HomeMy WebLinkAboutCity of Bethel Pt. 5Wind Turbine and Tower Product Information
NorthWind@ 100 Wind Turbine Proposal
Prepared for:
John Sargent
Grant Development Manager
City of Bethel, AK
Submitted by:
Northern Power Systems
182 Mad River Park
Waitsfield, VT 05673
Brett Pingree
802-583-7342
This proposal includes data that shall not be disclosed outside the customer and shall not be duplicated, used,
or disclosed - in whole or in part - for any purpose other than to evaluate this proposal. If, however, a contract
is awarded to this offeror as a result of - or in connection with - the submission of this data, the customer shall
have the right to duplicate, use, or disclose the data to the extent provided in the resulting contract This
restriction does not limit the customers right to use information contained in this data if it is obtained from
another source without restriction. The data subject to this restriction are contained in pages 1-89
Northern
A Distributed Energy
Systems Company
Proposal to City of Bethel Northern Power
NW100 Wind Turbine
Executive Summary
Northern Power is pleased to provide The City of Bethel with this proposal for the supply of a
North Wind 100 (NW 100) wind turbine for installation at the City Shop. The specification for
the standard cold -weather NW 100 turbine proposed for this site is contained in Appendix C.
Northern Power has by far the most significant experience in remote Alaska with successful
wind turbine and wind -diesel integration projects implemented to date. Northern Power has
been installing and integrating wind turbines of various sizes in remote, inaccessible areas in
Alaska for over a decade. Most recently and most directly relevant to this project, we have
completed successful installations for three NW 100's in Kasigluk, AK and three NW 100's in
Toksook, AK, all within the last 10 months. These turbines have been operating consistently
and offsetting fuel for our customer, the Alaska Village Electric Cooperative (AVEC) since
their installation. Our NW 100 experience in Alaska began over four years ago with the
installation of a single machine in Kotzebue. That unit has been operating reliably to this day.
Additionally, Northern Power was the engineering, procurement and construction (EPC)
contractor for the first ever wind only, high penetration, wind diesel system on St. Paul Island
for TDX Power. Besides TDX, and the wind diesel integration support we provide to AVEC,
Northern Power has been the EPC contractor on multiple wind -diesel integration sites
throughout the world. With this experience, Northern Power and our partners held a Wind
Diesel Energy Conference in Bethel, AK this summer to educate Alaskans on our experience
with wind -diesel integration technology.
AVEC Kasigluk, AK
41, 660 KwH have displaced 3,471 gallons of diesel
NW 100 Proposal -City of Bethel AWRG 082806.docPage 2 of 61 Printed on 9/19/2006
Proposal to City of Bethel
NW100 Wind Turbine
Table of Contents
Northern Power
ExecutiveSummary .......................................................................................................................2
Capabilities......................................................................................................................................6
ScopeOf Supply..............................................................................................................................8
A. Recommended City of Bethel Wind System....................................................................8
B. Wind Turbine.....................................................................................................................9
C. Installation, Erection, and Commissioning.....................................................................10
D. Civil Engineering..............................................................................................................10
E. Geo-technical Assessment and Permitting......................................................................11
F. Structural Engineering...................................................................
Scope of Services
11
12
1) Shipping: ............................................................................................................................ 12
2) Technical Support..............................................................................................................12
Scopeof Responsibilities..............................................................................................................12
Pricingand Payment Terms........................................................................................................13
HardwareTerms And Conditions..............................................................................................15
Software Licensing Terms and Conditions................................................................................23
Appendix A: 2006 Commercial Rate Schedule.........................................................................25
Appendix C: NW100 Product Spec Sheet.................................................................................27
Introduction............................................................................................................................28
Scope.......................................................................................................................................28
DesignCodes and Standards.................................................................................................28
Design Constraints and Deviations from CWT Design......................................................29
TurbineDescription...............................................................................................................29
Turbine Specifications...........................................................................................................31
Subsystem and Component Descriptions.............................................................................33
Theoryof Operation..............................................................................................................36
Performance .............
.............................3 6
RemoteCommunication........................................................................................................36
Logistics..................................................................................................................................37
Operationand Maintenance.................................................................................................37
NW100 Proposal -City of Bethel AWRG 082806.doePage 4 of 61 Printed on 9/19/2006
Proposal to City of Bethel Northern Power
NW100 Mnd Turbine
Safety.......................................................................................................................................37
Appendix D: Bidder Qualifications...........................................................................................38
Northern Power Relevant Project Experience....................................................................38
STG Relevant Project Experience........................................................................................55
HDL Relevant Project Experience.......................................................................................57
Appendix E: Alaska Wind Resource Group Information........................................................58
NW 100 Proposal -City of Bethel AWRG 082806.doePage 5 of 61 Printed on 9/19/2006
Proposal to City of Bethel
NW100 Wind Turbine
Northem Power
Not only is Northern Power the pre-eminent wind turbine supplier for Alaska but we are the most
capable wind -diesel integrator as well. Our experience with the various penetration levels of wind
diesel systems, especially in remote regions, is unrivalled and well documented. With the seven
turbines we have installed in Alaska and the six more scheduled for installation in the summer of
2007 (AVEC villages of Chevak and Hooper Bay) we are achieving a critical mass in the Western -
Central regions of Alaska.
AVEC Toksook, AK
171,141 Kw/H have displaced 14,258 gallons of diesel
The NW 100 is the turbine of choice for the City of Bethel application for the following reasons. It
—" was specifically designed for operation on Antarctica, as the only turbine in its class built for the
severe weather conditions found in Polar Regions, it is a robust yet simplified design. This turbine,
as has been demonstrated, can handle all the weather conditions that Alaska has to offer. It is built
for extreme temperatures including icing events. Its inverter -based interface makes connecting to
any grid much more simplified. While the cost of deploying a self sufficient, mobile workforce in
these regions is high, the customer can feel confident in our ability to get the job done well, on time
and end up with a turbine that will run dependably for a very long time. When you review the
qualifications of Northern Power's team you will see that we are the most experienced with this
type of project. We know the risks and how to solve them, in advance. Our competitors are still
learning this.
NW100 Proposal -City of Bethel AWRG 082806.docPage 3 of 61 Printed on 9/19/2006
Proposal to City of Bethel
NW100 Wind Turbine
Capabilities
Northern Power
Over a period of more than 30 years in business, Northern Power has built an exceptional team
of wind engineers, managers and technicians involved with the company's wind turbine
development, design, manufacturing and installation capability. The company's employees
have extensive prior work experience in the industry, with wind companies such as US
WindPower, Westinghouse, Enertech, NRG Systems, AOC, Makani Uwila Power Corp.,
Southwest Windpower, and General Electric. Northern Power, the oldest continually operated
renewable energy company in the US, has a team with well over 200 combined years of direct
wind industry experience; along with strong backgrounds in the electrical, power electronic,
and power generation industries.
This experience base, combined with Northern Power's position as a leader in the design and
installation of high -penetration wind -diesel hybrid power systems has provided valuable insight
into the design of the NW 100 wind turbine. Northern Power, a power solutions company with
more than 1000 systems installed worldwide, adheres to a strict Quality Assurance process
throughout all phases of each product and project. We have been reviewed and approved by
multiple government and private sector clients and are widely recognized throughout the
industry for the quality of the systems that we install and support. Northern Power has received
ISO 9000/2001 certification.
Figure 1: NW100 Turbines in Northern Power's
Barre, VT Facility Prior to Shipment to Alaska
NW100 Proposal -City of Bethel AWRG 082806.docPage 6 of 61 Printed on 9/19/2006
Proposal to City of Bethel
NW900 Wind Turbine
Regional Presence and Remote Location Expertise
Some key strengths as they apply specifically to the
City of Bethel project are as follow: STG's strong
presence in Bethel as a business hub and STG's
eight NW 100 factory trained and certified turbine
native technicians from villages such as Chefornak,
Kasigluk to Kongiganak. This gives us a rapid
response capability to address any issue that may
arise and to provide long-term service and support in
your region. STG has proven time and again to be
the experts in deploying a rapid, lean, and effective
construction team to any site to solve difficult
problems. HDL's recognized expertise in the geo-
technical and civil engineering field provides
confidence in foundation engineering in all the
major types of geological conditions that exist in
Alaska (including permafrost and ice conditions).
Northern Power
Northern Power provides the only turbine rated to
withstand the cold temperatures and the high wind Figure 2: NW100 Turbine in Kotzebue, AK
regime that exists in Bethel. The NW 100 is Four years of operation above the Arctic
American -made; the design was funded by NASA Circle
and DOE, and is specifically intended for rugged, inaccessible and harsh climates. Based on our
experience with previous Northern Power -made turbines in icing conditions (i.e., the HR3 turbine
installed and currently operating on Antarctica) and the NW 100 winter operations in Toksook, and
Kotzebue, Northern Power is well suited for managing the extreme icing events (including rime ice)
that occur in this region. The blades are designed specifically to withstand 30 mm of ice and still
produce power. We have experience with a unique mil -spec hydrophobic blade coating that
enhances the shedding of ice.
NW 100 Proposal -City of Bethel AWRG 082806.docPage 7 of 61 Printed on 9/19/2006
Proposal to City of Bethel
NW900 Wind Turbine
Northern Power
Due to Northern Power's extensive history of deploying remote systems, we have developed the
SmartView® Monitoring System (SVMS). This product can provide Web -based remote monitoring
as well as local monitoring that allows authorized users anywhere in the world with an Internet
connection to remotely manage, monitor and troubleshoot the NW 100 (or diesel genets for that
matter). This has proven to be extremely effective in areas where help can be several days away.
Our SVMS would allow managers at the site, at any city office or in Anchorage (any place with
Internet connection) to monitor performance and operation.
Figure 3: SmartView screenshot
Scope Of Supply
A. Recommended City of Bethel Wind System
Analysis of Site
Based upon the Bethel site visit, the information presented by John Sargent and other
alternative committee members, data from AEA, and Northern Power's preliminary system
modeling; Northern Power has conducted a preliminary evaluation and recommendation for the
site. We recommend a new 32 m tower, with one -meter blade extenders for a 20 m rotor with
an anticipated electrical output of 220,762 kWhours per year. This system would be a grid
NW 100 Proposal -City of Bethel AWRG 082806.docPage 8 of 61 Printed on 9/19/2006
Proposal to City of Bethel
NW900 Wind Turbine
Northern Power
connected system and with our inverter -based turbine would require no additional controls; it
can be integrated as is.
Fatigue ]Loading Concerns With Used Wind Turbines
While fatigue loading and strength is a critical consideration in the design of any wind turbine,
it is of particular importance at sites with a high-energy wind resource and extreme weather,
such as the YK delta region. According to the widely accepted International Electrotechnical
design standard, IEC 61400-1, any wind turbine installed at these types of sites should have
been designed to withstand the fatigue -loading regime of a Wind Turbine Generating Site
(WIGS) Class 1. For example, there are times when the "Bering lows" can bring hurricane
force gales (70 mph or higher). This is the class that the NW100/19 was designed and certified
to by Underwriter's Laboratory (UL) under a Department of Energy (DOE) contract. The
NW100 is designed to withstand 135 mph winds. The NW100 design standard includes the
ability to withstand class A turbulence, the highest class for turbulence. Any turbine not
designed to withstand the loading from the IEC WTGS class, and turbulence, carries the added
risk of experiencing a premature fatigue failure in the load regime of the YK delta region in
AK. Furthermore, if the turbine has already undergone fatigue loading from earlier operation at
a different site (e.g. one of the "refurbished" "remanufactured" turbines currently on the
market), then any reduction of fatigue strength, and hence machine life, will be exacerbated at
the your wind site.
It is important to note as well that with any turbine not specifically designed for these wind and
weather operating extremes, it is not uncommon to have to limit the production time of the
turbine during cold weather events, which limits production and energy offset savings. Often
these turbines, when put into a weather regime they are not meant for, are accompanied by
multiple heating mechanisms that complicate the design and provide additional areas prone to
failure and down time.
Turbine:
One, new NW 100 variable speed, direct drive, cold weather wind turbine (reference attached
specification)
• 100kW rated nameplate capacity, 20m rotor
• Power converter and electrical/control interface at tower base
• Fitted weatherproof nacelle with customer logo and heater
• Heated wind speed and direction sensors for turbine control
• Down tower wiring: power and communication
• SmartView Internet based remote monitoring system
• Sta-clean Hydrophobic blade coating to help shed ice
NW100 Proposal -City of Bethel AWRG 082806.docPage 9 of 61 Printed on 9/19/2006
Proposal to City of Bethel
NW100 Wind Turbine
Tower:
Northern Power
One, new 32m-hub height tubular tower, with internal lighting, ladders, and fall restraint
system.
Table 4: 32 m Tower Features
Hub Height (m)
32
Design Class
IEC WTGS I
Design Certification Standard
IEC 61400-1b
# Sections
3
Weight (lb)
28000
Aesthetic
Tubular, tapered
Door
Hinged steel, vented
Color
White
Finish
Two-part urethane exterior enamel (2
coats)
Lighting
Full Height Internal
Climbing system
Internal Ladder w/ Fall Restraint System
Design Life (years)
30
Rated Temperature (deg F)
-50
Shipping Configuration
Nested sections
C. Installation, Erection, and Commissioning
All the necessary heavy equipment, concrete, materials and tools will be barged to the site
using one barge to minimize cost. The onsite construction schedule will consist of two straight
months of road improvement, site work, foundation preparation and creation, tower/turbine
erection, installation and then commissioning. The controls and integration work will follow the
installation schedule and dovetail into the commissioning phase. Our crews work ten-hour days
seven days a week until the job is done.
D. Civil Engineering
HDL will develop construction civil drawings for the project. We will prepare preliminary
drawings and outline sheet specifications that describe the work. Plans will be presented at the
65% and 95% completion phase. HDL will prepare an assembly of detailed engineered
drawings and specifications that completely describes the civil portion of the work. The plans
will include plans, cross -sections, details, general notes, legend and abbreviations. HDL will
provide designs for the layout and foundation of the wind towers.
Plans will be prepared using AutoCAD® 2005 on 22" x 34" sheets with the ability to half-size
to 11" x 17" drawings. The specifications will be technical specification for concrete, rebar,
NW 100 Proposal -City of Bethel AWRG 082806.doePage 10 of 61 Printed on 9/19/2006
Proposal to City of Bethel
NW900 Wind Turbine
Northern Power
coatings, rock anchors, grouting, and steel fabrications. The specifications will be commercial
standards. The plans will include civil drawings as required to construct the wind tower
foundations. A professional engineer registered in the State of Alaska will stamp the final
drawings. Upon completion of the design, one set of reproducible Mylar drawings and two sets
of half size bond paper plots will be delivered to STG. One set of electronic construction
drawings will also be delivered to STG.
E. Geo-technical Assessment and Permitting
The soils in the Bethel area are typically barely frozen, silty sands to sandy silts; nearly
identical to Kasigluk. The subsurface temperatures range generally from 31.5 to 32.5 degrees
Fahrenheit. Based on existing reports we will develop preliminary design recommendations
and then conduct a pile load test after the first pile is installed. At that time the depth of the pile
may be adjusted depending upon the test results. From our experience in the area we believe
that a large diameter helical pier will provide the necessary resistance to the expected uplift
loads generated by the wind towers. The helical piers will also provide sufficient axial load
capacity for the expected wind tower loads.
HDL will be on -site at the beginning of the pier installation to observe the installation of the
piers. HDL will then return in two to three weeks for load testing the test pile. HDL will
provide the appropriate gages, thermistors, thermometers, and an engineer to conduct the load
test. For testing piles in permafrost, ASTM Standard D-5780-95 is generally followed. The
pier will be loaded in tension with four loadings in increments of 50 percent of the design load
to an ultimate loading of 200 percent of the design load. Pier movement or creep will be
monitored and recorded during each loading. The load will be applied to the test pier until a
constant creep rate is maintained by the pier, this may take up to three or four days for the
larger loadings. The pier will be unloaded at the completion of the test, with a final rebound
reading obtained 24 hours after unloading. At the completion of the field-testing, HDL will
prepare a written report presenting the data and results of the pile load test.
STG, Inc. will provide all the hardware and labor to construct the loading apparatus and
instrumentation mounts for the testing procedure. HDL will work closely with STG through
the setup process to ensure the testing needs are met.
F. Structural Engineering
David Thompson, PE will provide the structural design for the foundation. The uplift loads
will govern the design of the foundation. HDL will prepare design drawings of the foundation.
NW 100 Proposal -City of Bethel AWRG 082806.docPage 11 of 61 Printed on 9/19/2006
Proposal to City of Bethel Northern Power
NW100 Wind Turbine
Scope of Services
1) Shipping:
This proposal includes shipping of all items directly to the Bethel City site.
2) Technical Support
Northern Power will provide as part of this product sale suitable drawings and documentation.
This effort will include:
• Complete foundation design
• Complete electrical interconnection design
• Complete civil and pertinent geotechnical/ design
• Complete communications interconnect specifications
• General documentation of required installation details
• Complete NW 100 O&M manual
Scope of Responsibilities
Northern Power will provide:
a. (1) NW100 wind turbine hardware, foundation, full delivery to site and a complete
installation.
b. Towers to be equipped with internal lighting, ladders, and fall restraint system.
c. Cabling for power and communication from nacelle to base controller connected into the
diesel grid
d. Controls and integration so that the turbines run automatically and excess wind energy is
dumped to the grid.
e. All labor, services, materials and work relative to and incidental to the erection,
installation, and commissioning of the wind turbine system.
Customer Provisions And Northern Power Assumptions:
a. Geotech data provided by City of Bethel is equal to the specific site,
b. A preliminary foundation design will be verified after the pile load test is completed
c. All permitting is managed by City of Bethel
d. Work hours to be 10 hour days 17 days per week
e. Core installation and erection work to be performed in Summer of 2007
NW100 Proposal -City of Bethel AWRG 082806.docPage 12 of 61 Printed on 9/19/2006
Proposal to City of Bethel
NW100 Wind Turbine
Pricing and Payment Terms
Northern Power
The installed costs for this project are exactly in line with the costs incurred with the two
previous installations (Toksook and Kasigluk) we performed in remote Alaska in the last 10
months. In the previous cases our customer (AVEC) had coordinated several major
construction projects to occur concurrently at the time the turbines were being installed, this
helped to offset the high costs of deploying heavy equipment, materials and workers to their
remote sites. As with Kasigluk, the foundations require piles that are augured in like screws.
Concrete also needs to be used to stiffen the base. Thermal siphons are used to keep the
permafrost from melting in the summer. Barging in the crane, the concrete equipment, the drill
and the aggregate and concrete adds significant costs to this single turbine project. In
conclusion, we will continue to work at finding cost savings with the other two projects that we
will be conducting in Chevak and Hooper Bay in the summer of 2007.
To help illustrate the high costs of construction projects in remote Alaska, especially for
difficult sites, the product (turbine, controls, and integration) is 51% of the total while the
construct and install piece (including geotech surveys and foundation design) are 49% of the
total. A line item breakdown of these costs can be provided if requested.
Table 5. Construct and Install Wind Turbine
Line Item
(All labor, services, materials and work relative to and
Line Item Cost
incidental to the items listed)
1. Construction of civil drawings, pile testing and structural
foundation design
$49,940
2. Construction and installation of the wind turbine. All
transportation of equipment, disposal, and clean up of the
project. Includes all as-builts and warrantees.
$372,345
3. NW100 turbine and tower with necessary controls to
connect with the grid.
$378,000
4. Installation and commissioning support, remote monitoring
software, project management and training for site personnel.
$69,930
Total for Turnkey Project
$870,215
NW 100 Proposal -City of Bethel AWRG 082806.doePage 13 of 61 Printed on 9/19/2006
Proposal to City, of Bethel
NW100 Wind Turbine
Table 7. Service Agreement Option
Northern Power
The NW 100 requires routine maintenance at 6 month and 12 month intervals, as per the Operation
and Maintenance manual. Northern Power is capable of providing 2 year or 4 year service
agreements up to any number of years as requested to support the site. We provide reliable and
timely support with our team's regional presence.
These service agreements will require the team to dispatch 1 Factory Certified Field Service
Technician (FST) per trip. The 6-month trip will be 1 day in duration and the 12-month periodic
maintenance trip will be 2 days in duration. We priced this using a Factory trained technician out of
Kasigluk.
A service proposal would include all consumables required to perform maintenance as per the
O&M manual. The City of Bethel shall provide 1 cubic meter of climate -controlled storage for NP
to store consumables, such as grease and hydraulic fluid, required for this maintenance contract.
A one year service agreement (two trips) would cost $6,665.00
Additional Terms:
• Delivery schedule (estimated): July 2007
• Labor rates for additional requested support based upon Northern Power's 2006
Commercial Rate Sheet (see attached)
• Expiration: This price quote is valid until November 15th, 2006. A decision made after this
time jeopardizes the delivery schedule due to long lead items and barge schedules.
NW100 Proposal -City of Bethel AWRG 082806.docPage 14 of 61 Printed on 9/19/2006
Proposal to City of Bethel
NW100 Wind Turbine
Hardware Terms And Conditions
Northern Power
The following terms and conditions ("Agreement") apply to any orders submitted by Customer
in response to this proposal. Any additional or differing terms and conditions on Customer's
Purchase Order do not apply unless expressly agreed to in writing by Northern Power. A
standard order acknowledgment form will not be considered to be such writing. If Northern
Power does expressly agree in writing, such agreement applies only to the order that it
references.
In consideration of the mutual covenants contained in this Agreement, Northern Power and
Customer agree as follows:
1. DEFINITIONS
In this Agreement,
a. "Northern Power's Documentation" shall mean the operation and maintenance manual,
diagrams, documents for installation and start-up, spare parts list, and any other
documents customarily provided by Northern Power with the Northern Power Products.
b. "Northern Power Equipment" shall mean a hardware device manufactured by Northern
Power that supports only one (1) user of the Software, per license, at any given time, a
subassembly of such device, or a spare part for such device.
c. "Northern Power Products" shall mean all products manufactured by Northern Power
including Northern Power Equipment, Northern Power Software and any related
Northern Power Documentation and services.
d. "Northern Power Software" shall mean Northern Power's proprietary computer software
programs, firmware, and third party software, in machine readable object code form only,
intended to be used solely on and with the Northern Power Equipment supplied or
designated by Northern Power hereunder, and includes any Enhancements provided by
Northern Power to Customer pursuant to the terms of this Agreement.
e. "Enhancement" shall mean modifications; refinements and improvements that Northern
Power makes to the Software and which Northern Power elects to incorporate into and
make a part of the Software and does not separately market. Northern Power reserves
the right to determine which modifications, refinements and improvements will constitute
Enhancements.
f. "Product" shall mean Northern Power Products and Third Party Products.
g. "System" means the control, and/or balance of system systems that consist of Northern
Power Equipment or Third Party Equipment and Northern Power Software or Third Party
Software; the precise type and quantity of which, that are subject to this Agreement, are
set forth on the quotation accompanying this Agreement.
h. "Third Party" means a party other than Northern Power, herein also called the "Licensor".
i. "Third Party Documentation" shall mean the operation and maintenance manual,
diagrams, documents for installation and start-up, and any other documents customarily
provided by a Third Party for distribution with the Third Party Products.
j. "Third Party Equipment" shall mean a hardware device manufactured by a Third Party.
k. 'Third Party Products" shall mean all products manufactured by a Third Party and
distributed by Northern Power, including Third Party Equipment, Third Party Software and
any related Third Party Documentation.
NW 100 Proposal -City of Bethel AWRG 082806.docPage 15 of 61 Printed on 9/19/2006
Proposal to City of Bethel
NW100 Wind Turbine
Northem Power
I. 'Third Party Software" shall mean Third Parry proprietary computer software programs
and firmware, in machine readable object code form only, intended to be used solely on
and with the Third Party Equipment supplied or designated by Northern Power hereunder.
a. General
The sales contract for the Products between Northern Power and Customer, shall be
made by means of Customer placing a firm written order and Northern Power
acknowledging an acceptance in writing through an Order Acknowledgement Form. No
order will be binding on Northern Power or Customer until so confirmed.
b. Cancellation
In the event that Customer cancels the Order Acknowledgement Form on or after order
acceptance by Northern Power, the following cancellation charges, computed as a
percentage of the price of the cancelled Products, shall be payable by Customer to
Northern Power for cancellation notices received by Northern Power in the following
time frames:
Cancellation Received
But On or Before
Cancellation Charge
After
% of Product Price
Order Acceptance
Four (4) weeks after
30%
order acceptance
Four (4) Weeks After
The mid -point of the lead
50%
Order Acceptance
time
The mid -point of the Lead
The date by which three-
75%
Time
quarters (3/4) of the
Lead Time has passed
The date by which three-
The Scheduled Product
100%
quarters (3/4) of the Lead
Shipment Date
Time
Lead Time is defined as the period of time from Order Acceptance to Scheduled
Product Shipment
Products and materials existing at the time of cancellation are the property of
Customer. As long as payment terms are in good standing, Northern Power will
provide, to the best of its ability, value and or resale of product and materials.
3. PRICE
Title to the goods will transfer to Customer upon payment.
4. TERMS OF PAYMENT
a. Products are invoiced in a per unit basis in accordance with the payment terms in
SECTION III "PRICING AND PAYMENT TERMS" and, subject to credit approval.
Payment is due net 30 days from date of invoice unless otherwise stated. Late payments
are subject to interest of 1.5% per month.
NW 100 Proposal -City of Bethel_AWRG 082806.docPage 16 of 61 Printed on 9/19/2006
Proposal to City of Bethel
NW100 Wind Turbine
Northern Power
b. Taxes on the transactions under this Agreement (excluding income taxes or other taxes
imposed upon Northern Power and measured by the gross or net income of Northern
Power) are the responsibility of Customer.
c. Payment for transportation, custom duties, taxes, installation and custom services are
due upon receipt of Northern Power's invoice.
d. All payments, fees and charges under this Agreement are non-refundable, except as
expressly set out in this Agreement. Except, as expressly set out in this Agreement,
Products are not returnable to Northern Power.
5. DELIVERY
5(a) Delivery
Shipping terms are delivered direct to Bethel, AK.. Delivery shall be deemed to occur at
Bethel, AK. In addition, title (except for Software) and risk of loss shall pass upon
payment. Additional special packaging requirements requested by Customer will be at
Customers expense. {Currently defined loading/packaging specification is included in
the turbine sales price}
5(b) Delivery Schedule
Northern Power shall use reasonable commercial efforts to fill all orders promptly
upon issuance of the Order Acknowledgement Form therefore. Delivery dates for
the Products are estimates only.
5(c) Delay
i) Northern Power Delay
Customer agrees to take all commercially reasonable action to mitigate any
additional costs or expenses that Customer may incur as a result of such
delay. In the event that Northern Power fails to deliver products within thirty
(30) days of the agreed upon schedule, Customer shall have the right, as its
sole and exclusive remedy, to cancel any Order Acknowledgement Form for
such delayed Products
ii) Delays Due to Customer Modification
Delays with respect to Northern Power originally committed shipment dates
which result from customer -requested and Northern Power -approved
modifications to the Products in question shall be considered Customer's
responsibility and, in such cases, Customer waives its right to cancel the
pertinent Order Acknowledgement Form Northern Power reserves the right to
alter delivery schedules, prices and discounts of any and all Products modified
as agreed by Customer and Northern Power.
iii) Northern Power Limitation of Liability for Delay
IN NO EVENT SHALL NORTHERN POWER BE RESPONSIBLE FOR SPECIAL,
INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES RESULTING FROM
A DELAY IN SHIPMENT. IN SO FAR AS SUCH DELAY IS NOT CAUSED BY
ACTIONS OR INACTIONS OF NORTHERN POWER
6. TESTING
Northern Power shall test the Northern Power Products before shipment in accordance with
Northern Power's standard test procedure. Customer may attend such Northern Power
NW 100 Proposal -City of Bethel AWRG 082806.doePage 17 of 61 Printed on 9/19/2006
Proposal to City of Bethel
NW100 Wind Turbine
Northern Power
Product testing, or if Customer fails to attend, shall be deemed to have waived its right to observe
such factory testing. Unless otherwise mutually agreed, the Northern Power Products are deemed to
be accepted by Customer upon completion of commissioning post installation by Northern
Power. Third Party Products are also deemed to be accepted upon commissioning by Northern
Power or Third Party to Customer.
7. WARRANTY AND SERVICES
(a) Warranty
(i) Northern Power Products. Northern Power shall warrant the Northern
Power Products to be free from defects caused by faulty materials or poor
workmanship and to conform to specifications furnished or approved by
Northern Power for the period of eighteen (18) months from the date of
shipment from Northern Power to Customer or twelve (12) months for the
date of commissioning which ever comes first as set forth in Article 5(a)
hereof. If any non -conformities are found in the Northern Power Products
by Customer, and reported to Northern Power in writing, during the
warranty period, Northern Power shall provide Customer with the services
described in paragraph (iv) below, at no charge ("Warranty Services"). The
Warranty Services of this paragraph (i) shall only be provided during local
normal business hours and at a Northern Power facility selected by
Northern Power. Northern Power will pay the cost of shipping Northern
Power Products for Warranty Services from Customer's site to Northern
Power and the cost of shipping repaired or replaced Northern Power
Products from Northern Power to Customer's site provided that Customer
ships the Northern Power Products in accordance with Northern Power
shipping instructions: Should Northern Power deem it necessary,
Northern Power will provide the Warranty Services at Customer's site
and at no charge for parts, labor or travel.
(ii) Third Party Products. Northern Power does not warrant and is not
responsible for any Third Parry Products or services. Except those
provided by Northern Power with the Northern Power products covered by
this agreement. Customer's sole and exclusive rights and remedies with
respect to any such Third Party Products or services are against Third
Party and not against Northern Power. However, to the extent
permitted by agreement with a Third Party, Northern Power shall assign
to Customer any Third Party repair warranties applicable to the Third
Party Products.
(iii) THE FOREGOING WARRANTIES IN PARAGRAPHS (i) and (ii) ABOVE ARE
IN LIEU OF AND EXCLUDE ALL OTHER WARRANTIES NOT EXPRESSLY
SET FORTH HEREIN, WHETHER EXPRESSED OR IMPLIED BY
OPERATION OF LAW OR OTHERWISE, INCLUDING BUT NOT LIMITED
TO ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
FOR A PARTICULAR PURPOSE, OR NON -INFRINGEMENT.
(i) Northern Power's liability hereunder in any case is expressly limited to
the replacement (but not removal and installation) of components or
subcomponents of the Northern Power Products not complying with
this Agreement or at Northern Power's election, to the repayment of,
or crediting Customer with, an amount equal to the amounts
received by Northern Power for such Northern Power Products,
whether such liability is for breach of warranty or negligence. All
NW 100 Proposal -City of Bethel AWRG 082806.docPage 18 of 61 Printed on 9/19/2006
Proposal to City of Bethel Northern Power
NW100 Wind Turbine
replaced parts will become the property of Northern Power or its
representative on an exchange basis. The warranty under paragraph (i)
above shall not apply to any Northern Power Product which shall have
been: (a) repaired or altered other than by Northern Power or its
authorized or approved service personnel; (b) subjected to physical
or electrical or other environmental abuse or misuse, including, without
limitation, improper storage or installation which is not in accordance with
Northern Power specifications; (c) operated in any manner inconsistent
with the applicable Northern Power instructions for use; or (d) any reason
not attributable to Northern Power. Corrective services of any nature
required from Northern Power or its representatives, for the Northern
Power Products due to inadequate or inaccurate information supplied by
Customer, changes in Customer's business requirements, or any of the
conditions listed in the previous sentence, are not included as part of the
Northern Power obligations or warranties, and will be provided,
depending on available resources, at Northern Power's then current
rates. Northern Power's obligation under any warranty does not include,
and Northern Power shall not have any liability for, any work required to
restore or rebuild files or other data or material destroyed due to Product
malfunction.
(ii) Warranty Services may be performed by Northern Power subsidiaries,
branches or distributors ("Agent").
(b) Installation and Training
Northern Power shall provide installation, installation assistance and training
only to the extent expressly provided herein, or in a statement of work
referencing this Agreement. Except as expressly provided, site preparation
and installation is the sole responsibility of the Customer. Northern Power
does not accept responsibility for the connection of the Systems to non -
Northern Power - Customer products. Should Customer connect or
request Northern Power to connect the Systems to any non -Northern
Power - Customer products, Northern Power shall have no liability for any
malfunction or damage which may result.
(c) Post -Warranty Services
For Northern Power Products, Post -Warranty services provided to
Customer by Northern Power shall be provided in accordance with
Northern Power then -applicable Terms and Conditions of Field Labor
Services. For Third Party Products, Post -Warranty services provided to
Customer shall be provided by Third Party, and shall be provided in
accordance with the then -applicable Third Parry service agreement.
8. RETURN MATERIAL AUTHORIZATION NUMBER
If Customer returns Northern Power Products to Northern Power subject to Article 6 or 7
here above, Customer shall request a Return Material Authorization number from Northern
Power.
9. LIMITATIONS ON LIABILITY
IN NO EVENT SHALL NORTHERN POWER BE LIABLE TO Customer FOR ANY SPECIAL,
INDIRECT, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES. NORTHERN
POWER'S LIABILITY ARISING OUT OF THE MANUFACTURE, SALE OR SUPPLYING OF A
NW 100 Proposal -City of Bethel AWRG 082806.doePage 19 of 61 Printed on 9/19/2006
Proposal to City of Bethel
NW100 Wind Turbine
Northern Power
PRODUCT OR ITS USE OR DISPOSITION, WHETHER BASED UPON WARRANTY,
CONTRACT, TORT OR OTHERWISE, SHALL NOT EXCEED THE ACTUAL PURCHASE
PRICE PAID BY Customer FOR SUCH PRODUCT.
10. CHANGES AND DISCONTINUANCE
Northern Power reserves the right to make changes in the specification of the Northern Power
Products or parts thereof, or to discontinue manufacturing the Northern Power Products. In the
event such products are discontinued, Northern Power will continue provide technical and
software support and spare parts to the best of its ability.
11. SOFTWARE LICENSES
The terms and conditions set forth in Exhibit A, attached hereto and made a part hereof, are
applicable in the event that Customer is licensing Northern Power Software under this
Agreement. The terms and conditions in Exhibit A are intended to supplement, and not
replace, the terms and conditions in the rest of this Agreement. In the event of a conflict
between the terms and conditions of Exhibit A and the other provisions of this Agreement, the
terms and conditions of Exhibit A shall prevail.
The terms and conditions of a Third Party Software License Agreement, between Third Party
and Customer, are applicable in the event that Customer is purchasing Third Party Software
Licenses under this Agreement. The terms and conditions of such Third Party Software License
Agreement are intended to supplement, and not replace, the terms and conditions in the rest of
this Agreement. In the event of a conflict between the terms and conditions of the Third Party
Software License Agreement and the terms and conditions of this Agreement, the terms and
conditions of this Agreement shall prevail.
12. COMPLIANCE WITH EXPORT LAWS
Removed, as not applicable to sale within US
13. USE OF TRADEMARKS AND INTERNET
Customer will not alter, remove from the Northern Power Products, or interfere with
trademarks, trade names and service marks owned by Northern. Power (the "Marks").
Customer will comply with Northern Power requirements to protect the Marks and
ownership rights in the Marks, and shall have the right to monitor such use.
Customer now and in the future acknowledges Northern Power right, title and interest in and
to the Marks and will not represent that it has any ownership interest in the Marks. Customer
will not adopt or use any trademarks, trade names or service marks confusingly similar to the
Marks. Customer shall not use any of the Marks on or in connection with any goods or
services other than the Products. Upon termination of this Agreement, Customer will
discontinue any and all uses of the Marks.
Unless otherwise agreed to in writing by Northern Power, all designs, specifications, drawings,
software, materials, special dies, molds, patterns, jigs, fixtures and any other property used by
Northern Power to furnish the Products to Customer shall be and remain the sole property of
Northern Power. Nothing in this Agreement conveys to Customer any rights to make or have
made the Products supplied by Northern Power. No rights or licenses with respect to the
Products are granted or deemed granted hereunder or in connection herewith, other than those
rights expressly granted in this Agreement.
15. SURVIVAL CLAUSES
NW 100 Proposal -City of Bethel AWRG 082806.doePage 20 of 61 Printed on 9/19/2006
Proposal to City of Bethel
NW100 Wind Turbine
Northem Power
The following provisions will survive the expiration or termination of the transaction contained in
this Proposal: Article 1 (Definitions), Article 4 (Terms of Payment), Article 6 (Testing), Article 7
(Warranty and Services), Article 8 (Return Material Authorization Number), Article 9 (Limitations
on Liability), Article 11 (Software Licenses), Article 12 (Compliance with Export Laws), Article
14 (Proprietary Information of Northern Power ) Article 15 (Survival Clauses), Article 16
(Governing Law), Article 17 (Arbitration), Article 18 (Force Majeure), Article 19 (Miscellaneous),
and Exhibit A (Software Licensing Terms and Conditions).
This Agreement shall, in all respects, be governed by and construed in accordance with the
laws of the State of Alaska, U.S.A, excluding: (i) its conflicts of laws principles; (ii) the United
Nations Convention on Contracts for the International Sale of Goods; (iii) the 1974 Convention
on the Limitation Period in the International Sale of Goods (the "1974 Convention"); and (iv) the
Protocol amending the 1974 Convention, done at Vienna April 11, 1980.
All disputes arising out of or relating to this Agreement shall be finally resolved by arbitration
conducted in the English language in Anchorage, Alaska, U.S.A. under the commercial arbitration
rules of the United Nations Commission on International Trade Law. Each party shall appoint
an arbitrator and the two arbitrators so appointed shall jointly appoint a- third arbitrator. Both
parties shall bear equally the cost of the arbitration. All decisions of the arbitrator(s) shall be
final and binding on both parties and enforceable in any court of competent jurisdiction.
Notwithstanding this, application may be made to any court for a judicial acceptance of the
award or order of enforcement. Notwithstanding anything contained in this Article to the
contrary, Northern Power shall have the right to institute judicial proceedings against Customer
or anyone acting by, through or under Customer, in order to enforce Northern Powers rights
hereunder through reformation of contract, specific performance, injunction or similar equitable
relief.
18. FORCE NIAJEURE
Neither party hereto shall be liable for default of any obligation hereunder (other than payment
obligations) if such default results from the force majeure which includes, without limitation,
governmental acts or directives; strikes; acts of God; war; insurrection, riot or civil commotion;
fires, flooding or water damage; explosions, embargoes or delays in delivery, whether of the
kind herein enumerated or otherwise, which are not within the reasonable control of the party
affected.
19. (MISCELLANEOUS
(a) Entire Agreement
This Agreement constitutes the entire agreement between the parties with regard to the matters
dealt with herein, and supersedes all prior representations, negotiations, understandings and
agreements, oral or written, between the parties with respect thereto.
(b) Assignment
This Agreement is not assignable or transferable by Customer in whole or in part, except with
the written consent of Northern Power. This Agreement and any of Northern Powers rights
and obligations hereunder may be assigned by Northern Power, upon giving written notice
to Customer.
(c) Waiver
NW 100 Proposal -City of Bethel AWRG 082806.docPage 21 of 61 Printed on 9/19/2006
Proposal to City of Bethel
NW900 Wind Turbine
Northern Power
The failure of Customer or Northern Power to enforce any of the terms or conditions of this
Agreement shall not be deemed a waiver of any right to enforce any terms and conditions of this
Agreement.
(d) Separability
In case any one or more of the provisions, or portions of provisions, of this Agreement shall be
deemed by any governmental authority to be invalid, illegal or unenforceable in any respect, the
validity, legality and enforceability of the remaining provisions, or portions of provisions,
contained herein shall not be in any way affected or impaired thereby.
(e) Relationship of Parties
The parties hereto agree that Customer is not an agent or employee of Northern Power. Customer
has no expressed or implied authorization to incur any obligation or in any manner otherwise make
any commitments on behalf of Northern Power.
(f) Government Approvals
It is the responsibility of Customer to obtain, at its own expense, any non -United States
government consents, authorizations, approvals, filings, permits or licenses required for each of it
or Northern Power to exercise its rights and to discharge its obligations under this Agreement
NW 100 Proposal -City of Bethel AWRG 082806.doePage 22 of 61 Printed on 9/19/2006
Proposal to City of Bethel Northern Power
NW100 Wind Turbine
Software Licensing Terms and Conditions
a. General. The following terms and conditions are applicable in the event that Customer is
licensing Northern Power Software under this Agreement, and are intended to supplement,
and not replace, the terms and conditions in the remainder of this Agreement. In the
event of a conflict between the terms and conditions of this Exhibit A and the terms and
conditions in the remainder of this Agreement, the terms and conditions of this Exhibit A
shall prevail.
b. License. The grant to Customer of rights to the Northern Power Software embedded in
the Northern Power Products which Customer purchases from Northern Power hereunder
is a non-exclusive royalty -free perpetual license to use such Northern Power Software in
the operation of such Northern Power Products. Customer may use the Northern
Power Software only in machine-readable form. A separate license is required for each
item of Northern Power Equipment on which a copy of the Northern Power Software
will be used. Customer shall not sell, assign, transfer, copy or sublicense such
Northern Power Software, provided that a single copy may be made for archival and
systems recovery purposes. Customer must reproduce and include the original copyright
notice and other proprietary notices on any copy, in whole or in part, made of the
Northern Power Software programs and related documentation.
c. Ownership. The Northern Power Software, in any form, and any copies thereof, and
related Northern Power Documentation, and all copyright, trade secret, patent,
trademark and other intellectual or industrial property rights therein, is and shall remain
the sole property of Northern Power. Customer's rights and licenses to use such
Northern Power Software is governed by this Agreement, including this Exhibit A.
d. Warranties. The Warranties described in Article 7(a)(i) of the Agreement shall only apply
to the current release of the Northern Power Software and shall not apply to any custom
Northern Power Software or Customer specific changes to the Northern Power
Software.
e. Confidentiality. The Northern Power Software is valuable to Northern Power and shall be
treated as confidential information of Northern Power. The ideas and the expressions
thereof contained in the Northern Power Software are confidential and proprietary
information and trade secrets of Northern Power and/or its Licensors that are disclosed
to Customer in confidence. Customer shall not cause or permit reverse engineering,
disassembly or decompilation of the Northern Power Software or disclosure, copying,
display, loan, publication, transfer of possession (whether by sale, exchange, gift,
operation of law or otherwise) orother dissemination of the Northern Power Software, in
whole or in part, to any third party without prior written consent of Northern Power.
Customer shall not modify, enhance or otherwise change or supplement the Northern
Power Software. Customer shall limit use of and access to the Northern Power
Software to such of Customer's employees as is directly involved in the utilization of the
Northern Power Software. Customer shall take all reasonable steps to safeguard the
Northern Power Software and to ensure that no unauthorized persons have access to the
Northern Power Software.
Modifications by Northern Power. It is understood and agreed by Customer that the
Northern Power Software, and any Enhancements thereto, including without limitation,
unless otherwise expressly agreed to in writing between, Northern Power and Customer,
those resulting from any tasks, work, assignments or services supplied by Northern
Power to Customer or its suppliers or Customers (including training), shall be and remain
the sole and exclusive property of Northern Power and/or its Licensors, subject to the
use thereof by Customer only under the terms of this Agreement.
NW 100 Proposal -City of Bethel AWRG 082806.docPage 23 of 61 Printed on 9/19/2006
Proposal to City of Bethel
NW900 Wind Turbine
Northern Power
g. Termination. The licenses granted under this Agreement shall remain in effect until (i) a
refund is made pursuant to Article 7(a)(iv) "Warranty", (ii) Northern Power terminates the
licenses by reason of Customer's breach of any of the terms or conditions of this
Agreement and then its failure to cure such breach in accordance with the provisions of
this Agreement, or (iii) Customer terminates the licenses in writing. Upon termination of
this Agreement, Customer shall forthwith pay all sums invoiced to Customer by Northern
Power and return or destroy all copies of the Northern Power Software at Northern
Power's instruction and shall certify in writing by an officer of Customer that all copies and
systems recovery copies thereof have been destroyed and/or deleted from Customer's
computer libraries or storage facilities and are no longer in use.
IN WITNESS WHEREOF,
The parties have caused this Agreement to be executed and
delivered in:
as of the date and year written:
Its:
City of Bethel
By:
Its:
NW100 Proposal -City of Bethel AWRG 082806.doePage 24 of 61 Printed on 9/19/2006
Proposal to City of Bethel
NW100 Wind Turbine
Appendix A: 2006 Commercial Rate Schedule
Engineering Management
$ 165 / Hour
Engineering
$ 105 / Hour
Engineering Support
$. 85 / Hour
Project Management
$ 125 / Hour
Project Support
$ 80 / Hour
Field Services (FS)
$ 155 / Hour
Production Services
$ 65 / Hour
Northern Power
Overtime: Northern Power will invoice for work in excess of 10 hours per day and/or 50
hours per week (overtime work) at 1.5 times the above Field Services rate. Any
overtime will require prior written approval of the customer.
Reimbursable Costs: Northern Power will invoice all reimbursable costs associated
with the contract (airfare, lodging, meals etc.) at actual cost plus 15% for administrative
handling.
Terms: Net 30 Days from invoice issue date. Northern Power will invoice monthly or
upon completion of services, whichever occurs earlier, unless otherwise agreed to in
writing.
Effective Date: 1 January 2006
Prices will remain in effect until 31 December 2006. In support of specific proposals,
these rates may be extended, in writing, for a designated period.
Note: Northern Power reserves the right to alter the above commercial rates for
specific geographic regions and in response to particular customer requirements. Any
changes must be proposed by Northern Power and confirmed by the customer in
writing prior to Northern Power initiating billable work. Lastly in Alaska, 70-hour work
weeks (10 hour days, seven days a week) are considered normal during installation
and commissioning.
Use or disclosure of data contained on this sheet is subject to the restriction on the title page of the proposal
NW 100 Proposal -City of Bethel AWRG 082806.docPage 25 of 61Printed on 9/19/2006
m
0
Cl-
m
0
Z
Proposal to City of Bethel
NW100 Wind Turbine
Appendix C: NW100 Product Spec Sheet
Project: Bethel AK
Document Type: A
Document No.: TBD
Revision: 0
Northern Power
NORTHERN
_,.. POWER SYSTEMS
blame. le. ,. ° ._ �:
Prepared By: Dan Costin Acting Project Engineer
Checked By:
Reviewed
By:
Approved Garrett Wind Technology Group
By: Bywaters Leader
REVISION INDEX
0 1 8/10/06 ( First release for customer.
Use or disclosure of data contained on this sheet is subject to the restriction on the title page of the proposal
NW 100 Proposal -City of Bethel AWRG 082806.docPage 27 of 61Printed on 9/19/2006
Proposal to City of Bethel Northern Power
NW100 Wind Turbine
Introduction
The NW 100 turbine is a third generation turbine, which was developed under DOE contracts
specifically for cold weather operation.
Scope
This specification describes the current turbine design concept, its required specifications,
features, design and safety standards, and operational environment. This document also gives
a summary of the theory of operation, operation and maintenance, and logistics requirements.
The specification does not apply to turbines with larger rotor diameters, or towers other than
those mentioned herein. Operational parameters may be subject to change based on site -
specific data.
Design Codes and Standards
The following list of standards are broken into two categories: those that are formally used
and followed to the letter, shown in regular text, and those that are used for reference, shown
in italics.
Turbine & Structural Standards
1. International Electrotechnical Commission, Wind Turbine Generator Systems -Part 1:
Safety Requirements. International Standard 61400-1, 2nd Edition, 1998. Geneva,
Switzerland. 1998.
2. Eurocode 3: Design of Steel Structures Partl.1: General Rules and Rules for
Buildings. ENV-1993-1-1. English trans. European Committee for Standardization
(CEN).
3. VDI2230: Systematic Calculation of High Duty Bolted Joints, Joints with One
Cylindrical Bolt. Part 1. Verein Deeutscher Ingenieure. VDI Society for Product
Development, Design and Marketing. Dusseldorf, Germany. 1988.
4. Code of Practice for Fatigue Design and Assessment of Steel Structures.
BS7608:1993. London, England, 1993.
Electrical Standards
1. IEEE Recommended Practices and Requirements for Harmonic Control in Electrical
Power Systems, IEEE Standard No. 519-1992.
2. UL508A: Outline of Investigation for Industrial Control Panels, Underwriters
Laboratories Inc, 1993.
3. NEC1999: National Electric Code 1999, National Fire Protection Association, 1998.
Safety standards
The following safety standards were used as a reference.
Use or disclosure of data contained on this sheet is subject to the restriction on the title page of the proposal
NW 100 Proposal -City of Bethel_AWRG 082806.docPage 28 of 61Printed on 9/19/2006
Proposal to City of Bethel Northern Power
NW100 Wind Turbine
1. IEC20 Safety 2002 PersonelGuidelines
2. LabourSafetyEN50308
3. OSHA 3124 - Stairways and Ladders
4. OSHA Confined Space Entry
S. Guidelines Health and Safety in the British Wind Energy Industry
Design Constraints and Deviations from CWT Design
The CWT design is the standard design, which is employed at both the National Wind Test
Center in Boulder, Colorado, and Kotzebue, Alaska.
1) The rotor diameter for the turbines will be 18.7 meters due to constraints imposed by the
blade manufacturer. An option is available for a 19.7 m rotor for lower wind or lower density
sites.
2) The power inverter is re -designed to provide control of reactive power.
3) The nacelle was redesigned to fit into a ISO "high cube."
4) Some operational parameters have changed as a result of optimization and differing site
data.
Turbine Description
Turbine Architecture
The turbine will have a
1. Three bladed, stall controlled, upwind rotor
2. Rigid hub
3. Mechanical and dynamic brakes
4. Direct drive synchronous generator (wound -rotor )
5. Power conversion system allowing variable speed
6. Grid connected inverter allowing VAR selection
7. Active yaw drive system with friction damping
8. Tower type: steel tube monopole
Basic Features
The turbine will include the following features:
• The turbine will be designed to accept two tower heights.
• The turbine controller will allow remote access to monitor turbine operations, acquire
operation data, and reset faults.
• The rotor will be capable of being installed without the use of a crane.
• The turbine will be shipped in a standard ISO shipping container.
• A lightning protection system will be installed
The following will be included in the design:
Use or disclosure of data contained on this sheet is subject to the restriction on the title page of the proposal
NW 100 Proposal -City of Bethel AWRG 082806.docPage 29 of 61Printed on 9/19/2006
Proposal to City of Bethel
NW900 Wind Turbine
• Rotor lock
Northern Power
® The drive train will incorporate a speed sensor independent from the main controller,
which can trigger the dynamic and mechanical brakes.
• Emergency stop buttons located within reach of each service location.
• Lift points will be provided.
• Lanyard attachment points will be provided
• Fall restraint system for climbing the tower
• Nacelle emergency exit/service door.
Turbine Description Summary
The three bladed rigid rotor is bolted directly to the generator shaft. The generator input shaft
and bearing assembly act as the turbine mainshaft system. The generator is in turn bolted onto
a flange on the bedplate, and all turbine loads are transferred to the bedplate through this
connection. The bedplate is mounted to the tower through a yaw slew bearing. An electric
gear drive yaw system is utilized to actively orient the NW 100 to the wind. A spring applied,
hydraulically released caliper brake system is the primary emergency brake. An
electrodynamic brake acts as a secondary braking system for normal shutdown and
mechanical brake fault cases. A full nacelle and freestanding steel tubular tower allow access
to the up tower equipment without exposing personnel to the severe environment of the target
market sites. Figure 1 shows an assembly drawing of the tower top structure.
North Wind 100
Turbine Assembly
PT-B-0000-D-0100
PT-B.0100 -Rotor'
PT,B41200 Dri—Train
1'1'-"300 NaeeUr
PT-9-0400 Yaw Syma.
PT-B-0500 Tower
Figure 1. NW100 Tower Top Assembly
Use or disclosure of data contained on this sheet is subject to the restriction on the title page of the proposal
NW 100 Proposal -City of Bethel AWRG 082806.docPage 30 of 61Printed on 9/19/2006
Proposal to City of Bethel
NW100 Wind Turbine
Turbine Specifications
Table 1 NW100 Turbine System Data
Northern Power
Model Number j
North Wind 100/19.
Serial Numbers_
TBD
_
Turbine Assembly Drawing:
_ _
PT-B-0000-0100
Nacelle Assembly Drawing:PT-B-0000-0400
Orientation u wind / downwind)
Upwind
Power Control
Stall
Rotor Diameter (m)
19.7
_
Rated Tip Seed, mps
55.9
Rotor Speed, Rated, RPM
57.1
Rotor Speed Range, RPM
45.0 — 58.1
Rotor Speed, Overspeed Setpoint, j
RPM
60.0
Hub Height (m)
31.6
Wind Turbine Class (e.g. IA, 3B, S) S
If S-class enclose description Vavg = 10.2 mps, Vext=56mps, turbulence
ac.c.ording to IEC 61400-1, Annex A characteristic A; p =1.336 kg/m^3
Ice Loadin ' Yes
Design Life (years) 30
Rated Electrical Power (kW) 100
Rated Wind Speed (m/s) j 15
Cut -in Wind Speed (m/s) 4
Cut-out Wind Speed (m/s) 25
Extreme Wind Speed (m/s) 56
Power Curve (enclose table and graph) i See Graph
Blade
216
Hub i
209
Hub Extenders
0; 110.9 x 3=332.7
Rotor
875; 1207.7
_
Nacelle
6604
Tower Top (nacelle and rotor
7479; 7812
Tower mass
12384
Base Controller i
546
Manufacturer, Model of Blades TPI Composites, NPS-0100A
Len m 9.0
Material FRP
Use or disclosure of data contained on this sheet is subject to the restriction on the title page of the proposal
NW 100 Proposal -City of Bethel AWRG 082806.docPage 31 of 61Printed on 9/19/2006
Proposal to City of Bethel
NW900 Wind Turbine
First f!a wise uency 3.66 65 RPM
First edgewise frequency (Hz) j 5.66 0),, 65 RPM
Number of Blades i 3
Swept Area m) _ 274.6; 304.8
Synchronous Rotational S eed m) NA
Rated Rotational Speed See Above
Rotor Hub Type (e.g. rigid, teeter) Rigid
(zoning Angle deb 0
Tilt Angle (egg4.0
Rated Blade Pitch Angle (deg)2.2; 0.9
Direction of Rotation (looking Clockwise
downwind)
Northern Power
Gearbox Manufacturer, Type, Ratio I Direct drive
Generator: Manufacturer, Tye Cantare , Salient Pole Synchronous
Generator: Voltage, Frequency 575 VAC / 3 , Variable
Generator: Synchronous, Rated and ' NA, 58 RPM, 72 RPM
Max Speed
Parking / Service Brake: Dellner; Spring -applied calipers (Qty 2),
Manufacturer, Type, Location Mainshaft
Normal Shutdown Brake: Northern Power Systems, Dynamic brake,
Manufacturer, Type, Location Generator field circuit
Emergency Shutdown Brake: Dellner; Spring -applied calipers (Qty 2),
Manufacturers ems, Location I Mainshaft,
Brake Design Torque, kNm (min) 30.4
Wind Direction Sensor NRG
Yaw Control Method(passive, active) Active
Yaw Actuator (electrical, hydraulic) Electrical
Yaw Brake: Manufacturer, Type, i Northern Power Systems, Constant friction,
Location ; Slew bearing face
Controller: Manufacturer, Type Northern Power Systems, PS 2000 WT100
Software: Release, Version Number 1.10
Monitoring System: Manufacturer, Northern Power Systems, Smart View WT
Power Regulation (e.g. pitch, stall, Variable speed stall
active stall)_
Over speed Control (e.g. tip brake, Caliper brake, dynamic brake
itch, mech. brake
Generator Connection Ungrounded Wye, 3 wire to rectifier
Grid Side Phase Connection Delta or ungrounded Wye
Use or disclosure of data contained on this sheet is subject to the restriction on the title page of the proposal
NW 100 Proposal -City of Bethel_AWRG 082806.docPage 32 of 61Printed on 9/19/2006
Proposal to City of Bethel
NW100 Wind Turbine
Northern Power
Descrition
e(l lta/Wye) -�—
Nominal Electrical Output: Number of
Phases, Voltage, Frequency
3�, 480 VAC, 60 Hz
Grid Tolerances (voltae, frequency)
+10 / -15% of nominal voltage, +/-2 Hz
Inverter Output Reactive Power i
+/- 45 WAR 480 Vac
Tower ��r
Tower Type _ _ :,
_
Tubular steel monopole
Height m
25(Base to Hub
First tower modal frequency; not
including foundation stiffness (I3z)
1.15
First tower modal frequency; including i
foundation stiffness
1.00
Erechonr&;Service _. -;._. t
Crane Reqts
Includes provisions for rotor and service boom
use.
..x
Temperature Range, Operational
-34°C to 40°C
-30° F to 104' F
Humidity
100%, condensing
Rain j
Severe
Salt Water
Coastal siting possible, no direct spray
Icing
According to GL Guidelines
Wind Blown Particulate '
Periodic exposure to blowin dust and sand
Lightnin
Probable - adequate grounding re wired
Seismic Loading---
Zone 4
Subsystem and Component Descriptions
Rotor
The NW 100 turbine utilizes a blade manufactured by TPI Composites of Warren, RI, USA.
The blade was developed specifically for the NW 100, and is constructed using fiberglass
reinforced vinylester. It incorporates the wind turbine specific 5819, S820, S821 airfoil
series. This series was developed to reduce sensitivity to roughness caused by dirt, bugs, and
wear. The blade has an advanced root design, which is suitable for low temperature
operation, and integral lightning protection is provided. The rotor hub is of Y-shaped design
with integral shaft mounting flange.
Drivetrain
Generator Assembiy
The generator configuration is a 28 pole synchronous machine, with a salient pole wound
rotor.
The rotor poles are built up from 1.5mm low carbon cold rolled steel laminations. The rotor
poles were stacked in a jig, then compressed and welded together. The poles are wound with
Use or disclosure of data contained on this sheet is subject to the restriction on the title page of the proposal
NW 100 Proposal -City of Bethel AWRG 082806.docPage 33 of 61Printed on 9/19/2006
Proposal to City of Bethel
NW100 end Turbine
Northern Power
120 turns of 2.89mm X 7.34mm nominal conductor with quad build Class H insulation. The
individual pole assemblies were dipped and baked using the VPI process.
The rotor spider is a machined weldment, to which the 28 field pole assemblies are bolted.
The rotor spider is attached to the generator mainshaft with a shrink disk device. The field
poles are wired in a series connection, with alternating CW and CCW wound assemblies to
create N and S poles. The field power leads are connected to a slipring assembly mounted on
the mainshaft.
The stator is built up from 0.5mm thick, 60' arc lamination segments, using M-36 electrical
grade silicon steel, with a C-5 coating system. The stator also incorporates quarter section
fmgerplates and full section stiffening rings on each side of the stack.
The stator windings are form wound, with nine turns per coil of four 1.83mm X 5.18mm
nominal conductor with quad build Class H insulation. The stator is insulated, wired, brazed,
tested, dipped, and baked in the horizontal plane in the stator frame to maintain the stator
roundness and flatness criteria.
The stator assembly is mounted in a welded generator housing, which consists of the
structural stator frame and integral mounting pad for connection of the generator to the
turbine bedplate. The generator housing also contains the bearing mounts for the generator
mainshaft, which serves as the rotor mainshaft in this integrated design configuration. The
generator housing and shaft assembly is designed to transfer all turbine loads to the turbine
bedplate without affecting the generator operating clearances. Dual squirrel cage fan
assemblies are mounted to the stator frame to provide active cooling of the generator.
A rear generator cover shields the rear side of the generator, and provides mounting areas for
the stator, field, and RTD junction boxes, air exhaust hood, and slipring access door.
Main Shaft Brake Assembly
The NW 100 uses a mainshaft braking system consisting of two spring applied, hydraulically
released calipers for fail-safe operation, a 1.Om brake disk clamped between the hub and
mainshaft flanges, and a hydraulic power pack and associated controls. The hydraulic power
pack is supplied with an electric heater, and is housed in an insulated enclosure to enhance
low temperature performance.
Bedplate
The NW 100 bedplate is the main structural element of the towertop assembly, transmitting
the rotor loads from the mainshaft and bearings to the tower. The bedplate is an A709-50
weldment consisting of an L-shaped rectangular tube to which the drivetrain assembly is
bolted, and which is welded to longitudinal beams running rearward across the yaw bearing.
The brake caliper mounts, rotor service lock, yaw drive mount, and service boom mount are
integral to the bedplate.
Yaw Assembly
The NW 100 uses an active yaw drive system to orient the turbine to the wind. It is comprised
of a single planetary drive, pinion and integral slew ring/bull gear. A'/2 hp gearmotor
mounted to the turbine bedplate drives against the bull gear to yaw the turbine. A wind
azimuth error sensor mounted on the nacelle provides the yaw command input. A proprietary
friction system provides constant yaw friction to minimize low amplitude vibration of the
nacelle.
Nacelle Assembly
Use or disclosure of data contained on this sheet is subject to the restriction on the title page of the proposal
NW 100 Proposal -City of Bethel AWRG 082806.docPage 34 of 61Printed on 9/19/2006
Proposal to City of Bethel
NW900 Wind Turbine
Northern Power
The nacelle is fabricated from fiberglass reinforced polyester (FRP). The nacelle is sized so
that it can be shipped, assembled, in a standard ISO container. The design includes a
removable top with integral daylighting hatches, and a removable side for erection and major
service activities.
Turbine Controller
The NW 100 controller is used to autonomously control a 100kW wind turbine (the NW 100).
The controller is comprised of the base controller, which is the free-standing enclosure and
associated electrical equipment located in the base of the tower, the nacelle controller, which
is the small wall -mount enclosure located in the nacelle, and the software/firmware that runs
on the PLC and inverter DSP. The power converter assembly, including rectifier, inverter,
field exciter, and dynamic brake, is located within the base controller; the dynamic brake
loadbank is located outside of, but nearby, the base controller.
The main, or base, controller is housed in a freestanding IP65/NEMA 12 rated enclosure in
the base of the turbine tower. The base enclosure houses the PLC CPU and base backplane,
power circuits, field exciter, dynamic brake controls, and the variable speed power converter.
The base controller monitors the power circuits and the power converter, issues field exciter
and dynamic brake current commands, and communicates with the upper controller, the local
operator interface, and the remote operator interface.
The slave, or nacelle controller is interfaced to the base controller, and is mounted in the
turbine nacelle. The base controller communicates with the nacelle controller through a
dedicated RS485 serial link. The upper controller operates in slave mode to the base
controller, monitors the towertop subsystems, generator temperature, and environmental
conditions, and controls the mainshaft brake, yaw, and temperature control systems.
The power converter is an open frame device that mounts in the base system controller
enclosure. The power converter DSP controller is interfaced to and receives operating
commands from the overall turbine controller. The unit is designed to comply with IEEE 519,
and uses air-cooled IGBT switching devices. The power converter input stage rectifies the
generator output with a passive full bridge rectifier to create the internal nominal DC bus
voltage. This DC bus is then inverted and injected into the grid through a passive filter and
reactor in order to ensure low harmonic output.
The base controller local user interface includes hard controls that provide for emergency
stop and other critical user functions. The nacelle controller is equipped with hard switches
to allow safe service mode access to the nacelle, as well as manual yaw and brake control.
Tower
The standard NW 100 tower is a tapered tubular steel tower. Access is gained through a door
located at the tower base. The turbine controller and power converter are located in the tower
base for protection and ease of service. An internal ladder equipped with a fall restraint
system accomplishes access to the nacelle.
Foundation
The foundation design for the NW 100 is site specific. Concrete pad or pile type foundations
are dimensioned using design loads provided by NPS.
Transformer
A transformer (one per NW 100) is required for connecting the turbine with the
interconnected utility system. The transformer is not supplied or installed by Northern
Power, but is an important system component because it completes the inverter output filter.
Use or disclosure of data contained on this sheet is subject to the restriction on the title page of the proposal
NW 100 Proposal -City of Bethel AWRG 082806.docPage 35 of 61Printed on 9/19/2006
Proposal to City of Bethel
NW100 Wind Turbine
Northern Power
The turbine -side windings must be configured as ungrounded (floating) wye or delta, and the
transformer impedance must be specified to be approx. 5-6% p.u. at 110kVA (i.e. transformer
kVA rating must be closely matched to the turbine rated output). The utility system side
windings may be configured as specified by the customer (or local utility authority). For the
sites covered under this specification, the turbines are connected to the utility tie-in point
typically through three oil filled, pole mounted, single phase 37.5kVA transformers,
configured as a floating-wye bank on the turbine side windings.
Theory of Operation
The power converter is used in a wind turbine application to interface the output of a slow
speed, direct drive synchronous generator to an AC grid. The generator nominal rated output
is 120kW. The AC output voltage of the generator is rectified to DC, and the DC voltage is
regulated by the inverter. The speed of the turbine is controlled by loading the generator
using field control. The overall wind turbine operates in a fully automatic, unattended
manner, with the wind turbine system controller interfaced with the power converter
controller.
In addition to the inverter, two other power converters are operating from the DC bus. These
are a dynamic brake and the field exciter. The dynamic brake is used to limit the DC bus
voltage when the inverter goes off line or does not convert enough power to the utility to keep
the turbine from over charging the DC bus capacitance. The field exciter is a DC to DC
converter operating from the DC bus which provides field current to excite the synchronous
generator. The field current is controlled in response to the turbine speed to keep the wind
turbine operating at peak aerodynamic efficiency. Under normal operating conditions the
wind turbine provides the maximum possible power to the DC bus and the inverter converts
this power to the utility in response to the DC bus voltage changes.
The supervisory control system is a Koyo 450-CPU PLC system, the inverter control system
is a C240 DSP board, and the field exciter and dynamic brake control system is an analog
printed circuit board called the DB/Exc control board.
Refer to the Operation and Maintenance Manual for a more complete and practical
description of the operating procedures:
AVECWTG804-YO 1 -00 1 -Operation & Maintenance Manual
Performance
Power Curve and Energy Production
The turbine power curve and sample energy production estimates are shown in the Appendix
B, NW 100 Power Curve and Energy Production.
Availability and Reliability
No availability or reliability targets have been set.
Remote Communication
Interruptions in or failure of remote communications will not result in a shutdown of the
turbine.
Use or disclosure of data contained on this sheet is subject to the restriction on the title page of the proposal
NW 100 Proposal -City of Bethel AWRG 082806.docPage 36 of 61Printed on 9/19/2006
Proposal to City of Bethel Northern Power
NW100 Wind Turbine
Logistics
Transport
The turbine nacelle, including hub, generator, mainframe, nacelle cover, and power
conversion equipment, shall be dimensioned such that they can be transported in a single high
cube ISO container.
Erection
The turbine will be installed with a crane.
Operation and Maintenance
Operation
• Remote communication, fault monitoring and fault reset.
• Remote turbine operation and data retrieval.
Service
• Provisions for local shutdown and lockout of turbine will be provided.
• Provisions for manual operation of key subsystems (yaw system, mechanical
brake) for purposes of servicing and checking functionality will be provided.
• A safety climb system will be provided in the turbine tower.
• Attachment points will be provided in the tower top and nacelle for maintenance
personnel to secure harness lanyards.
• A system to remove and install the turbine rotor without the use of a crane is
required.
• Routine maintenance interval: 6 months.
Safety
Safety of personnel while installing, commissioning, and maintaining the turbine will be
considered. The installation, commissioning, and maintenance documents will include
procedures that reference guidelines and standards summarized above.
Use or disclosure of data contained on this sheet is subject to the restriction on the title page of the proposal
NW 100 Proposal -City of Bethel AWRG 082806.docPage 37 of 61Printed on 9/19/2006
Proposal to City of Bethel Northern Power
NW100 Wind Turbine
Appendix D: Bidder Qualifications
Northern Power Relevant Project Experience
Project Descriptions
Project #1: Toksook Bay, Alaska,
Three 100kW Wind Turbines for Grid Interconnected Wind/Diesel Grid
The Alaska Village Electric Cooperative (AVEC) installed its first Northern Power NorthWind
100 turbine in the community of Toksook Bay in late 2005 with three NorthWind 100 turbines
running in conjunction with diesel generators in a new power plant. It is estimated that these
turbines will produce approximately 675,000 kWh annually and could displace approximately
32% of the energy normally generated by diesel. The majority of the energy produced by the
turbines serves the local electrical load, but a portion is utilized as a "dump heat' load and is
transferred to the Toksook water plant by way of a recovered heat loop.
By AVEC estimations, based upon a diesel efficiency of 13.0 kWh/gallon, and the AVEC 2004
bulk fuel contract price for diesel of $1.8327 per gallon, approximately 51,900 gallons of diesel.
fuel will be displaced annually resulting in fuel cost saving at 2004 prices of nearly $95,000 per
year.
Turbine installation was completed in late 2005 and commissioning activities completed in early
2006. AVEC, the Denali Commission and the Coastal Village Resource Fund jointly funded the
project.
NorthWind 100 - 100kW Wind Turbine
AVEC, Toksook Bay, AK
NW 100 Proposal -City of Beth. -I AWRG 082806.docPage 38 of 61 Printed on 9/19/2006
Proposal to City of Bethel
NW100 Wind Turbine
Northem Power
Project #2: Kasigluk, Alaska,
Three 100kW Wind Turbines for Grid Interconnected Wins!/Diesel Grid
After successful installation and operation of the NW 100 in Toksook Bay, AK the Alaska Village
Electric Cooperative (AVEC) installed three additional Northern Power NorthWind 100 turbine
in the community of Kasigluk. The installation and commissioning was completed in June 2006
All three units are running in conjunction with diesel generators in a new power plant. It is
estimated that these turbines will produce approximately 675,000 kWh annually and could
displace approximately 32% of the energy normally generated by diesel. The majority of the
energy produced by the turbines serves the local electrical load, but a portion is utilized as a
"dump heat" load and is transferred to the Kasigluk water plant by way of a recovered heat loop.
This is nearly the exact same system as was installed in Toksook Bay.
By AVEC estimations, based upon a their diesel efficiency of 13.0 k)Wgallon, and the AVEC
2004 bulk fuel contract price for diesel of $1.8327 per gallon, approximately 51,900 gallons of
diesel fuel will be displaced annually resulting in fuel cost saving at 2004 prices of nearly
$95,000 per year.
Turbine installation, and commissioning activities was completed in June 2006. AVEC, the
Denali Commission and the Coastal Village Resource Fund jointly funded the project.
NorthlNind 100 - 100kW Wind Turbine
AVEC, Kasigluk, AK
NW 100 Proposal -City of Bethel_AWRG 082806.docPage 39 of 61 Printed on 9/19/2006
Proposal to City of Bethel Northem Power
NW900 Wind Turbine
Project ##3: Kotzebue, Alaska,
100kW Wind Turbine for Grid Interconnected Wind/Diesel Grid
Like most communities in rural Alaska, Kotzebue uses electricity produced by diesel engine
driven generators. Kotzebue Electric Association (KEA) operates six such generators with a
combined rated capacity of 11.2 MWe. During summer, when coastal harbors are free of ice,
barges carry diesel to Kotzebue from Seattle, a journey of over 3,000km The fuel is stored in
large tanks for use during the winter, but with ageing NorthWind 900 - 900kW Wind Turbine
storage facilities, stricter environmental regulations, and KEA, Kotzebue, AK
reduced state subsidies for diesel fuel, the costs for such
diesel delivery were becoming too high. In response,
KEA turned to wind generation. With long-term wind
speeds averaging over 6 m/s, the idea of harnessing wind
energy had long appealed to the towels 3,500 residents.
r .
About 6% of all electricity consumed in the town is
produced by the wind plant, which has a total capacity of
660 kWe. Northern Power's NorthWind® 100 (NW 100)
wind turbine, developed with support from the DOE was
one of 12 turbines installed.
The NW 100 was specifically designed for high
reliability and low maintenance in cold weather which is
Construction of the NW 100 turbine in Kotzebue took place during the winter of 2002. Currently,
KEA personnel provide ongoing operations and maintenance support for the wind project with
periodic support from an electrical contractor and a full-time wind energy engineer. Service
consists of standard, sight and sound inspection by the local utility personnel, along with several
local operators that perform tasks such as greasing the alternator and yaw bearings. Factory
personnel make a scheduled service trip every six months. Several attributes of the machine lend
themselves to simplifying service needs, such as an integral crane for lifting heavy objects, such
as a yaw drive unit, and SmartView, NPS' monitoring system, a fully -functioning remote
monitoring and database system that allows real-time queries via a satellite -based Internet Service
Provider.
NW 100 Proposal -City of Bethel AWRG 082806.docPage 40 of 61 Printed on 9/19/2006
Proposal to City of Bethel Northern Power
NW100 Wind Turbine
Project #4: POSS Camp, St. Paul Island, Alaska
Tanadgusix Corporation
Commercial High -Penetration Wind -Diesel Hybrid Power System
In March 1999, Northern Power commissioned a turnkey, high penetration wind -diesel hybrid
power system on the island of St. Paul, Alaska. This relevant project has many technical and
logistical similarities to hybrid systems under consideration for the Alaskan Bush. The success of
the TDX project has helped distinguish Northern Power as a world leader in utility -scale wind -
diesel systems, and demonstrates our ability to design and build complex, high quality power
systems in logistically challenging environments.
The High -Penetration Wind Diesel Hybrid Power System
St. Paul Island, Alaska
St. Paul Island is located approximately 200 miles off the coast if Alaska, in the Pribilof Islands
in the Bearing Sea. The island has a population of about 1,100 people, 80% of whom are native to
the island. The Tanadgusix Corporation (TDX) is an Alaskan native corporation that owns several
facilities on St. Paul. One of these facilities, the POSS camp, is located several miles from the
center of town on St. Paul, and includes a small airport and industrial facilities. TDX's goal was
to further develop this facility in order to increase employment and enterprise on the island.
During the mid 1990's TDX pursued several avenues that would allow them to take advantage of
the world -class wind resource on the island. TDX approached Northern Power with the idea of
disconnecting the POSS camp from the island's grid and building an isolated wind -diesel plant
for the facility's electric loads. The impetus for a high -penetration wind -diesel hybrid system was
to reduce the overall energy costs for the POSS Camp's electrical and heating loads, while
maintaining reliable, utility -grade electricity. The high -penetration configuration allows the POSS
camp to maximize the energy contribution from the wind, as the system is able to operate in a
"wind -only" mode during times that the wind turbine output exceeds the facility's load
requirements. Limiting the diesel run-time in this manner has resulted in long-term energy cost
savings. During times when the wind turbine's output exceeds the electric load at the POSS
Camp, the excess energy is diverted to a secondary load, consisting of multiple three-phase
NW 100 Proposal -City of Bethel AWRG 082806.docPage 41 of 61 Printed on 9/19/2006
Proposal to City of Bethel
NW100 Wind Turbine
Northern Power
resistive heaters that are switched on in a binary sequence. The resistive heaters are mounted in a
large insulated water tank and this water is used to heat the offices and shop space at the TDX
facility. A secondary load controller (SLC) switches elements of the binary load on or off to
match the total electrical load demand to the power being generated. The SLC acts as the prime
bus frequency control during operation at high levels of wind power penetration. In short, this
subsystem enhances overall system economics by significantly reducing the heating fuel
requirements at the facility.
Northern Power designed and installed the entire power system for this project from the ground
up. The power system includes:
® One 225 kW Vestas V27 Wind Turbine
® Two 150 kW Volvo Diesel Generators
® One 300 kVA Synchronous Condenser with a Synchronous Condenser Controller (SCC)
® One 5000 gallon thermal storage tank with 446 kW secondary load controlled by a
system
® Frequency Regulator
® One Supervisory wind -diesel controller (WDC)
® A Remote monitoring system
Each of the generators was automated with an Encorp GPC controller, and linked to the
supervisory WDC. Northern Power designed, built, programmed, and installed the SCC, the
WDC, and the generator switchgear/GPC cabinets. In addition, Northern Power installed the
entire wind turbine system including the foundation and electrical interconnection. Northern
Power also installed the synchronous condenser, the generators, and the secondary load system.
Upon completion of the wind turbine installation, Vestas-American Wind Technology, Inc. sent a
representative to St. Paul to assist Northern Power in the commissioning of the wind turbine.
Shortly thereafter, Northern Power commissioned the entire power system.
Northern Power employee Ed Linton was critical to the success of this project. As senior project
engineer, Ed Linton was responsible for all of the system design, programming, and testing. Ed is
a leading expert in wind -diesel hybrid control systems. His expertise included sizing system
components, including the secondary load and the synchronous condenser, and the programming
of the WDC system.
Northern Power provided long-term support for TDX, and we have been very successful in
training a local St. Paul Islander with limited technical background to operate this advanced,
automated power system. The hybrid power plant on St. Paul Island continues to serve as a model
for future isolated grid projects around the world. In summary, we believe that Northern Power's
work at the POSS Camp on St. Paul Island best exemplifies our relevant past performance with
integrating wind generators into isolated diesel -based electric grids.
NW 100 Proposal -City of Bethel AWRG 082806.docPage 42 of 61 Printed on 9/19/2006
Proposal to City of Bethel
NW900 end Turbine
Northern Power
Project #5: Burnt Mountain
Power System for US Air Force Nuclear Test Ban Treaty Monitoring Site
Northern Power designed, manufactured, and tested a hybrid TelePowerTM photovoltaic/
diesel power system and installed it on a mountaintop site at Burnt Mountain in Alaska.The
power system provides regulated DC power for the operation of a seismic array. This site
represents the third in a series of extreme cold environment power systems designed and
installed by Northern Power for the U.S. Air Force. The systems power seismic monitoring
sites are maintained by the Air Force to monitor international compliance with the
Comprehensive Nuclear Test Ban Treaty. Northern Power was contracted for these projects
by the Geophysical Services and Products (GSP) Company of Abilene,Texas.
The major power system components are located at a
central master site. The master site power system
uses a combination of a 5280-Watt photovoltaic
array and dual 6.5 kW diesel/JP-8 fueled engine
generator sets to charge a 3140 Amp -hour, valve
regulated, lead -acid battery bank. The seismic array
consists of 5 remote stations located from 0.9 mi. to
2.4 mi. away from the master site. The remote sites
are powered from the master site by an armored
cable distribution plant. The 24 VDC from the
master battery bank is converted to a nominal 300
VDC for distribution to each remote seismic array
station. DC converters at each remote site step down
the distributed 300 VDC to the 24 VDC required by
the seismic equipment.
Solar power is the primary source of energy for the Burnt Mountain power system from mid -
February until almost November. The generators provide backup power throughout much of
the year, and are the primary energy sources for the Burnt Mountain power system from
November through mid -February. The battery bank is sized to provide seven days of
autonomy to 80% depth of discharge during low sun conditions.
The specification for the hybrid power system demanded a minimum 20-year operating life.
For maximum reliability, redundant components were designed into every subsystem —
generators with integral fuel tanks, PV subarrays, battery strings, rectifiers, inverters, DC/DC
converters and heaters. All of the "extreme cold" systems use a Northern Power SC-300
hybrid power system controller, based on an industrial standard PLC (Programmable Logic
Controller).The architecture of the SC-300 system can be readily modified in hardware or
software to meet future requirements. The primary function of the SC-300 Controller is to
maintain the system batteries and provide power to the loads.To ensure the batteries are
optimally charged,the SC-300 can select and control the various energy sources available at
the site, while simultaneously performing load management, environmental control, data
acquisition, and alarm generation.
Power system monitoring and control is provided by Northern Power's proprietary
RemoteViewTM software package.Through RemoteView, the power system's PLC can
communicate to a remote PC over either a hardwire connection or a wireless telemetry path.
The RemoteView interface allows decisions regarding power system and load operation to be
evaluated and implemented from off -site.
The power system shelter is a modular refrigeration type enclosure customized with extra
interior insulation, gasketed doors, and an external support framework for the PV array. The
shelter is partitioned into two rooms. One room houses the generator sets, while the other
NW 100 Proposal -City of Bethel AWRG 082806.docPage 43 of 61 Printed on 9/19/2006
Proposal to City of Bethel
NW100 Wind Turbine
Northem Power
contains the control system, batteries, and space for the customer -installed electronics. The
shelter has a CO2 fire suppression subsystem. The main SC-300 system controller monitors,
but does not operate the fire system, which has its own control panel.
After completing a rigorous design and review process, the system was fully configured at
Northern Power's Vermont facility. As with similar Antarctic systems, specifications
demanded 100% power availability and only one maintenance visit per year. Once
assembled, the system was operated through one complete Vermont winter in order to ensure
absolutely reliable performance and minimal installation time in Alaska.
Installation of the system presented a considerable challenge. Burnt Mountain lies north of
the Arctic Circle, distant from any human development. All personnel and supplies had to be
flown in by helicopter from Fairbanks, 215 miles away. Northern Power personnel faced
cold, snowstorms, mud, and grizzly bear visits during the springtime installation. After a
foundation and the site grounding for the master shelter were installed, over 40,000 feet of
armored cable was laid out by helicopter for the power distribution to the remote array sites.
From the end of the Steese Highway at Circle, Alaska, the preassembled master site shelter was
then flown 110 miles by U.S.Army Chinook helicopter onto the waiting foundation.The Northern
Power installation team, with USAF personnel, erected the PV array and antenna tower, and
completed the system connection and site testing within three weeks.The system was brought
online immediately by the government. Despite lightning strikes, extreme cold, and high winds,
the Northern Power system has operated continuously since the installation.
NW100 Proposal -City of Bethel AWRG 082806.doePage 44 of 61 Printed on 9/19/2006
Proposal to City of Bethel Northern Power
NW100 Wind Turbine
Project #6: Black Island Antarctica
TelePower System Powering Remote Satellite Earth Station
Since January of 1985, the National Science Foundation's Black Island satellite earth station has
been powered by a hybrid TelePowerTI system which was designed, supplied, and installed by
Northern Power. The unmanned Black Island site was selected to provide year-round satellite
communications with the outside world for the U.S. McMurdo Station in Antarctica. Because the
McMurdo Station cannot "see" the communications satellite due to Mount Erebus (elevation
12,448% which towers behind the Station, the Black Island facility provides a terrestrial
microwave link to the station.
Black Island is located 20 miles from the McMurdo Station and is only accessible by helicopter
or a dangerous two-day traverse over the Ross Ice Shelf. The harsh conditions at Black Island,
coupled with the difficult access, encouraged the NSF to consider an alternative to the typical
"diesel only" power solution, which requires frequent maintenance and refueling. The initial
system selected consisted of a NorthWind® IM wind turbine (3kW peak), manufactured by
Northern Power, coupled with a 1.2kW Ormat
closed cycle vapor turbine generator. Both of Black Island Antarctic
these power sources charged a 24VDC battery Hybrid TelePower system for year -
bank with the entire system managed by a round satellite communications
Northern Power SC- 1000TM system controller.
Even though environmental conditions at
Black Island are among the worst in the world,
the availability of the power system has been
outstanding, exceeding 99.99% as of February
1999, despite documented wind speeds up to
197 mph and minimum temperatures as low as
—70' F. The power requirements of the Black
Island site have steadily increased as the
communications capabilities of Antarctic
facilities have been expanded. The site now
also supports a NASA tracking station.
Northern Power has been repeatedly contracted to upgrade the site by supplying additional power
components and systems integration.
The Black Island site includes satellite earth station terminals, terrestrial links, and both fixed and
mobile HF radio receiving equipment. The final power system for the site consists of four
NorthWind® HR3 wind turbines, three diesel gensets, and a 1 OkW photovoltaic array. The
addition of the photovoltaic array is significant in that it highlights the expense and undesirability
of fuel handling and delivery in Antarctica. Even though the site is in total darkness for several
months each year, the photovoltaic array is cost effective when compared to the delivered cost of
fuel at Black Island. A custom designed programmable logic controller manufactured by
Northern Power supplies system intelligence.
The renewable energy -based TelePower system for Black Island demonstrates the NSF's
commitment to protecting the unique environment on the Antarctic continent and to reducing the
impact of humans on this fragile ecosystem. At the same time, no sacrifice in system reliability
results from this primary reliance on clean, renewable energy power sources.
NW100 Proposal -City of Bethel AWRG 082806.docPage 45 of 61 Printed on 9/19/2006
Proposal to City of Bethel
NW100 Wind Turbine
Northern Power
Project #7: Lake Vanda and Mt. Newall, Antarctica
Air Force Technical Applications Center, Comprehensive Test Ban Treaty
Monitoring Site Remote Wind -Diesel Power Systems
The Lake Vanda and Mt. Newall power systems are a marquee project for Northern Power,
demonstrating our company's ability to successfully design, build, install, and maintain a
complicated hybrid wind project in a remote and harsh environment for a military client.
Northern Power was awarded the contract for this project on a sole -source basis because, in the
opinion of the USAF, we were the only company that had the indigenous capability and proven
experience to take on a project of its scope and degree of difficulty.
A Remote Wind -Photovoltaic -Diesel Hybrid Power System
Comprehensive Test Ban Treaty, Mt. Newell, Antarctica
As part of the Comprehensive Test Ban Treaty (CTBT), multiple seismic and infrasonic
monitoring stations have been installed to detect unauthorized nuclear detonations. Due to the
sensitivity of these monitoring stations, they must be installed in very remote regions of the
globe, but must also operate according to very high reliability standards.
In October 1998, the Geophysical Services and Products Company (GSP), on contract to the
United States Air Force Technical Applications Center (AFTAC), subcontracted Northern Power
to design, construct, test, and then install two hybrid power systems in Antarctica. These systems
provide power to a seismic monitoring site locate at Lake Vanda, in the Dry Valleys, and a
repeater site on the 6,700 ft. summit of Mount Newall. The seismic site is one of the primary
International Monitoring Site (IMS). Prior to contracting with Northern Power, hybrid systems at
these sites had never successfully operated for and entire winter. Northern Power was selected by
GSP as the sole source supplier of these systems based on our previous success on Black Island,
Antarctica. Black Island is located approximately twenty miles off the coast of Antarctica, and
serves as the primary telecommunications link between the National Science Foundation's
McMurdo Station, and the outside world.
Northern Power followed a rigorous design process to ensure these systems met GSP and USAF
specifications. This process included: Preliminary Design Review (PDR), Critical Design
Review (CDR), and Final Design Review (FDR) procedures.
NW 100 Proposal -City of Bethel AWRG 082806.docPage 46 of 61 Printed on 9/19/2006
Proposal to City of Bethel
NW100 Wind Turbine
A Photovoltaic -Diesel Hybrid Power System
Comprehensive Test Ban Treaty, Lake Vanda, Antarctica
Northem Power
Each of the power systems for this project is housed in a custom steel shelter. The shelters consist
of a.freezer building with a special exoskeleton designed to withstand wind speeds in excess of
200 miles per hour. The hybrid power system at the seismic monitoring site at Lake Vanda
consists of a 2,200 Watt photovoltaic array and dual Lister Petter diesel generator sets. The
hybrid power system at the telecommunications repeater system atop Mt. Newell consists of a
3,300 Watt photovoltaic array, a single Lister Petter diesel generator, and one of Northern
Power's time -tested and Antarctica -proven HR3 wind turbines. (Six HR3 wind turbines have
supplied reliable power to the remote telecommunication center on Antarctica's Black Island for
over ten years.) The HR3 is a wind turbine designed and built by Northern Power specifically for
extreme environments. The rigorous design specifications, coupled by the multiple power
generation sources, make Mt. Newell's hybrid power system arguably one of the most
sophisticated remote power systems ever built.
Once design was completed, each of the power systems was fully constructed at Northern
Power's facility in Vermont. The systems were then operated and tested for several months
during the winter to ensure successful performance. Following this, a factory acceptance test was
performed with GSP, and witnessed by representatives of Detachment 3, Airborne System
Command (ASC).
Both the Lake Vanda and Mt. Newell sites are over 100 miles from the nearest manned base
(McMurdo Station) and consequently, the sites are only accessible by helicopter. As a result,
following acceptance testing, the systems (together weighing over 85,000 pounds) were
meticulously marked, disassembled, and packed into loads no larger than 2000 pounds (the
helicopter lift limit). After the disassembled power systems were shipped to the McMurdo
Station, they were then flown, one lift at a time, to their respective sites in the Antarctic interior.
In January 1999, in conjunction with GSP and USAF personnel, Northern Power's field
technicians reconstructed the power systems in the field. During the installations, the field crews
were exposed to very extreme conditions, sleeping in tents, and living and working in sub -zero
temperatures for several weeks. Upon completion, GSP and USAF representatives witnessed final
testing and field commissioning. The project was completed on time and according to schedule.
Since commissioning in 2000 the Lake Vanda and Mt. Newell systems have operated flawlessly.
NW100 Proposal -City of Bethel AWRG 082806.doePage 47 of 61 Printed on 9/19/2006
Proposal to City of Bethel
NW900 Wind Turbine
Northern Power
Project #8: Windless Bight Antarctica
Solar Hybrid Power System for Nuclear Test Ban Monitoring Site
Northern Power provided a TelePowerTM photovoltaic/diesel power system for a Comprehensive
Nuclear Test Ban Treaty (CTBT) monitoring site, located in Windless Bight, Antarctica. The
system supplies regulated DC power for the operation of an acoustic sensor array. It is the fourth
such system that has provided for CTBT monitoring sites in extreme cold weather environments.
This Windless Bight system is one of three that exist on the continent of Antarctica, while
another site is located at the other end of the earth, above the Arctic Circle at Burnt
Mountain,Alaska.
The Windless Bight site is located near the main U.S. base in Antarctica, McMurdo Station. The
University of Alaska's Geophysical Institute (UAGI) maintains and operates the monitoring site.
The National Center for Physical Acoustics contracted Northern Power for the project, while the
UAGI served as Northern Power's contact for technical and logistical issues. The system's power
is generated by a combination of a 1,980-Watt photovoltaic array backed up by dual 6.5kW
diesel/JP-8 fueled generator sets. Power is stored in a large Valve Regulated Lead Acid Battery
Bank.The system's sophisticated environmental controls maintain the power shelter to an average
temperature of 50' F, while temperatures
outside the shelter routinely drop below — Windless Bight Antarctic
70°F during the winter months. Solar -Hybrid, Nuclear Test Ban Treaty
The system was designed for a 20-year
operating life. UAGI's acoustic sensor array
consists of 8 remote stations located from
1,000 ft. to 4,500 ft. away from the central
power site. The remote stations are powered
from the central site by a set of armored
cables. The 24 VDC from the main battery
bank is converted to a nominal 60 VDC for
distribution to each remote acoustic array
station. DC converters at each remote site
step down the distributed 60 VDC to the 12
VDC required by the equipment.
Monitoring Site
From the beginning of November through the end of February, solar power is the primary source
of energy for the Windless Bight power system. The JP8 fired gensets provide backup power
throughout much of the year, and are the primary energy sources for the power system from
March through October. The battery bank was sized to provide eight days of system autonomy in
the event of poor solar resource or failure of either genet to start.
The Windless Bight site, like the other Antarctic CTBT sites, is located in one of the world's
harshest environments and is not accessible most of the year. Since it was critical to have a
maximum reliability power source, Northern Power's engineers designed this system with time -
tested, performance -proven components. Single points of failure were eliminated and the system
was exhaustively tested before being shipped down to the "ice."
The brain behind the Windless Bight system is a Northern Power SC-300 hybrid power system
controller. This state-of-the-art controller is based on an industrial standard PLC (Programmable
Logic Controller). The architecture of the SC-300 system can be readily modified in hardware or
software to meet future requirements. The primary function of the SC-300 controller is to
maintain the system batteries and provide power to the loads. To insure the batteries are optimally
charged, the SC-300 can select and control the various energy sources available at the site, while
simultaneously performing load management, environmental control, data acquisition, and alarm
generation.
NW 100 Proposal -City of Bethel AWRG 082806.docPage 48 of 61 Printed on 9/19/2006
Proposal to City of Bethel
NW900 Wind Turbine
Northern Power
Power system monitoring and control is provided by Northern Power's proprietary
RemoteViewTM SCADA software package. Through RemoteView, the power system's PLC can
communicate to a remote PC over either a hardwire connection or a wireless telemetry path. The
RemoteView interface allows decisions regarding power system and load operation to be
evaluated and implemented from off -site. To withstand the extremely cold and harsh
environment, the system's shelter was a custom-built, highly insulated building with gasket
doors, ski skids, and an ice shield roof An external support frame was incorporated for the PV
array. The shelter was partitioned into two rooms, one that houses the gensets, the other the
control system, batteries, and space for the UAGI-installed electronics.
After completing a rigorous design and review process, the system was fully configured at
Northern Power's Vermont facility. As with similar Antarctic systems, specifications demanded
100% power availability and only one maintenance visit per year. Once assembled, the system
went through a complete Factory Acceptance Test in order to ensure absolutely reliable
performance and minimal installation time in Antarctica_ The system was shipped intact via a
dedicated ocean vessel to McMurdo where it was off-loaded and dragged on its ski skid bottom to
the field site, 23 miles away. The site receives close to four feet of snow a year so all field cable
connections are detachable to allow the shelter to be pulled up out of the snow and repositioned
once a year.
The Northern Power installation team, working alongside UAGI personnel, erected the PV array,
antenna tower, and meteorological station, and completed the system connection and site testing
in less than two weeks. The system was brought online immediately for the 2001 winter season.
NW 100 Proposal -City of Bethel AWRG 082806.docPage 49 of 61 Printed on 9/19/2006
Proposal to City of Bethel
NW900 Wind Turbine
Northern Power
Project #9: USDA Agricultural Research Service, Bushland, Texas
National Renewable Energy Laboratory (NREL) Subcontract XAT-8-18221-
01
Development of Commercialized Controls for Wind -Diesel Hybrid Power
Systems
Northern Power's work with the National Renewable Energy Laboratory (NREL) at the United
States Department of Agriculture's (USDA) Agricultural Research Service (ARS) facility in
Bushland, TX highlights our expertise as a leader in the development of control systems for
complex wind -diesel hybrid power systems. The USDA's ARS facility in Bushland, TX is an
isolated electric grid that was historically powered by three 40 kW diesel generators. During the
1980s, the ARS converted the facility's diesel generators into vegetable oil fueled bio-diesels.
ARS also installed two 50kW wind turbines and attempted to operate their facility as a hybrid
power system. ARS had difficulty with this system and unfortunately was not able to operate the
system in wind -only mode.
In 1998, NREL, in their continued effort to advance wind -diesel hybrid technology, awarded a
contract to Northern Power to develop and commercialize a wind -diesel control system. The
USDA's ARS facility was selected as an ideal choice for a Wind Hybrid Test Laboratory
(WHRL) for this work. The project objectives included:
• Identification of the most suitable generator supervisory control system
• Installation and programming of Encorp's GPC control system hardware, and developing
• firmware that allowed extending the Encorp controllers into wind -diesel system control
• Development and implementation of a test plan to fully characterize the performance of
the
• control system and provide a basis for refining/improving the control system
• Development of a plan for additional work, including field validation of the control
system.
This project was divided into two distinct phases. Phase I included the design and
commercialization of a control system for high -penetration wind -diesel hybrid systems without
battery storage. During Phase I, Northern Power developed, tuned, and tested a supervisory
control system that was suitable for the optimal operation of a high -penetration system. This
system was based on existing generator control components produced by Encorp. Once this was
completed, long-term and transient performance in all wind and load regimes, including all
system states, and state transitions was recorded. In addition to the installation of Encorp GPC
generator controllers for automation of the existing diesel generators, the power system required a
controller for the synchronous condenser, a secondary load controller, and the supervisory hybrid
system control software. The GPC controllers for the generators and the synchronous condenser
were standard Encorp products, however, special firmware modifications were required for the
supervisory hybrid system controller, and special internal PLC programs were required for all
controllers. Phase I of this project was commissioned in June 2000.
Phase II included the development of system controls for a high -penetration wind -diesel hybrid
power system with battery storage. Northern Power designed and installed a 100 kVA rotary
power converter and a 200 Ali battery bank, then worked with Encorp to develop firmware for the
Rotary Converter Controller. Once installed, the system was tuned and tested for performance in
all wind and load regimes. Comparisons were also made between system performance with and
without battery storage. Phase II of this project was commissioned in September 2001.
NW 100 Proposal -City of Bethel AWRG 082806.docPage 50 of 61 Printed on 9/19/2006
Proposal to City of Bethel
NW100 Wind Turbine
USDA Agricultural Research Service Wind Hybrid
Test Laboratory
Northern Power
Northern Power was successful in completing the objectives of this project, developing a
commercialized set of products for a variety of wind -diesel hybrid configurations. In addition, the
USDA's power system now operates successfully in wind -only mode, and fine-tuning of the
system control parameters has increased the periods in this mode of operation.
NW 100 Proposal -City of Bethel AWRG 082806.docPage 51 of 61 Printed on 9/19/2006
Proposal to City of Bethel
NW100 Wind Turbine
Northern Power
Project #10: Joanes, Brazil,
50kW Grid Interconnected Wind/PV Hybrid for Support of Weak Diesel Grid
In a project which demonstrates Northern Power's experience working with weak, diesel -based
island grids, in 1995 Northern Power designed and installed a grid interconnected wind/PV/batter
storage hybrid system to bring reliable, cost efficient power to the community of Joanes, Brazil.
Prior to the installation of the system, residents of Joanes, located on the island of Marajo at the
mouth of the Amazon River, were receiving costly, insufficient power from their local 1 MW
diesel plant. The 50kW system includes four IOkW wind turbines, a lOkW PV array and a
228kWh battery bank sized to carry the load during a typical daily peak period without any real
time contribution from renewable sources.
The configuration uses Northern Power's Rotary Converter, which is comprised of a synchronous
three-phase AC alternator coupled to a DC motor. The motor receives renewable DC electricity
from the wind turbines, photovoltaic panels or battery bank, supplying torque to the synchronous
alternator, which in turn converts the DC power to clean, regulated AC power. Use of the
synchronous alternator maintains grid stability by delivering all AC power from a single source,
free of harmonic content. There are no switching transients or harmonic distortion of the AC
waveform.
The National Renewable Energy Laboratory (NREL), working on behalf of the US Brazilian
Renewable Energy Rural Electrification Project, contracted Northern Power's turnkey services
for the Joanes system. Other partners included NREL's Brazilian counterpart, Centro de
Pesquisas de Energia Electrica (CEPEL), and the Brazilian utility, CELPA.
Grid Interconnected Wind/PV Hybrid System
Joanes, Brazil
NW 100 Proposal -City of Bethel AWRG 082806.docPage 52 of 61 Printed on 9/19/2006
Proposal to City of Bethel Northern Power
NW100 Wind Turbine
Project References
The list below includes contact information for each of the projects presented above.
Reference #1: Toksook Bay, Alaska, Three NW100 Wind Turbines
Mr. Brent Petrie
Alaska Village Electric Cooperative, Inc.
4831 Eagle Street
Anchorage, AK 99503
Phone:907-565-5358
Email: bpetrie@avec.orgT
Reference #2: Kasigluk, Alaska, Three NW100 Wind Turbines
Mr. Brent Petrie
Alaska Village Electric Cooperative, Inc.
4831 Eagle Street
Anchorage, AK 99503
Phone:907-565-5358
Email: bpetrie@avec.org
Reference #3: Kotzebue, Alaska, NW100 Wind Turbine
Mr. Matt Bergen
Kotzebue Electric Association, Inc.
907-442-3491 (main)
907-442-8662 (cell)
Email: m—bergan@kea.coop
Reference #4: Tanadgusix Corporation, Poss Camp, St. Paul Island, Alaska
Mr. Bruce Levy
TDX Power Corporation
Two West Market Street, Suite 400
West Chester, PA 19382
Phone: (610) 918-8581
Fax: (610)918-8583
Email: brace@tdxpower.com
Reference #5: Burnt Mountain
Mr. Norm Ruotanen
Geophysical Services and Products
401 Cypress Street, Suite 426
Abilene, TX 79601
Phone: (915) 677-1933
Fax: (915) 677-4015
Email: gsp@abilene.com
Reference #6: Black Island, Antarctica
Antarctic Support Association (ASA)
(No longer in business)
Reference #7: Vanda Lake Bed and Mt. Newell, Antarctica
Mr. Norm Ruotanen
Geophysical Services and Products
NW100 Proposal -City of Bethel AWRG 082806.docPage 53 of 61 Printed on 9/19/2006
Proposal to City of Bethel
NW900 Wind Turbine
401 Cypress Street, Suite 426
Abilene, TX 79601
Phone: (915) 677-1933
Fax: (915) 677-4015
Email: gsp@abilene.com
Reference #8: Windless Bight Antarctica USAF base
Dan Osborne
Research Scientist
Phone: (907) 474-7107
E-mail: Dosborne@gi.alaska.edu
Northern Power
Reference #9: USDA Agricultural Research Service, Bushland, Texas
Mr. Gerry Nix
National Wind Technology Center, NREL
1617 Cole Blvd., Building 27/264
Golden, CO 80401
Phone: (303) 384-7566
Fax: (303) 384-6925
Email: gerald—nix@nrel.gov
Reference #10: Joanes, Brazil, Wind/PV Hybrid System
Mr. Gerry Nix
National Wind Technology Center, NREL
1617 Cole Blvd., Building 27/264
Golden, CO 80401
Phone: (303) 384-7566
Fax: (303) 384-6925
Email: gerald_nix@nrel.gov
NW 100 Proposal -City of Bethel AWRG 082806.doePage 54 of 61 Printed on 9/19/2006
Proposal to City of Bethel
NW100 Wind Turbine
STG Relevant Project Experience
Experience
Northern Power
In 1996, St. George Construction was incorporated as STG, Inc. Since incorporation, STG
has become the preferred construction management company for both the Alaska Energy
Authority (AEA) and Alaska Village Electric Cooperative (AVEC). At least fifty percent of
the projects executed by these two entities are managed and constructed by STG.
The core competencies of STG, since inception, include bulk fuel systems and power
generation facilities. In recent years, the integration of wind generation systems with diesel
generators has become increasingly common. STG has either installed or is currently
installing wind generation systems for AVEC in Selawik, Toksook Bay, and Kasigluk,
Alaska. Heat Recovery Systems are another component of these integrated systems. STG
has installed 8 heat recovery systems in various villages throughout the Yukon Kuskokwim
Delta.
Pile foundations, a component of most bulk fuel tanks facilities and power systems, have also
become a niche for STG. STG is the prevalent pile foundation contractor in the interior and
Western Alaska.
Additionally, STG has expanded to become United Utilities preferred contractor for their
"Delta Net Project", which involves the installation of communication towers and related
equipment throughout the Yukon Kuskokwim Delta. STG has achieved this preferred status
by demonstrating competitive rates and the ability to perform in remote locations with
extreme logistical challenges.
STG's client list includes, but is not limited to the following:
Alaska Energy Authority
Alaska Native Tribal Health Consortium
Alaska Village Electric Cooperative
Alaska Village Council Presidents
Maniilaq
Neeser Construction
Nome Joint Utilities
Northwest Inupiat Housing
OTZ Telephone
SKW Eskimos, Inc.
UIC Construction
United Utilities, Inc
Yukon Kuskokwim Health Corporation
Project Execution
The STG team has developed and maintained the capacity to manage our projects through a
set of key deliverables to ensure appropriate management of our jobs through their complete
life cycle. These deliverables are as follows:
• Provision of a quality project at a fair and reasonable price
• Timely delivery within budget
• Safe and professional performance on all work
• Positive relationships with clients to ensure that project deliverables are met
• New modern equipment that results in high productivity
NW 100 Proposal -City of Bethel AWRG 082806.docPage 55 of 61 Printed on 9/19/2006
Proposal to City of Bethel
NW100 Wind Turbine
Northern Power
® State of Alaska Professional Land Surveyor (Reg. 10192) on staff with modern Topcon
GPS equipment
Project Planning
STG focuses pre -construction efforts on planning and preparation. A project team is
identified which includes management, administrative, and field supervision personnel. The
team establishes budgets, production targets, and generates a master construction schedule
and detailed work plan for each project.
The planning process involves all key supervisory personnel. All aspects of the project are
analyzed with particular attention to logistics, labor and equipment resource needs, and
material requirements. This results in a clear understanding of the goals of the client, the
contractual requirements, scope of work and potential obstacles that may impact the
successful completion of the job.
Quality Control
The project -planning phase puts in place key systems which help assure quality throughout
the project. This begins at the management level with a commitment to providing a quality
project to the client and carries through to the administrative level with timely, accurate
documentation and reporting, and on to the field level where clear goals of production and
quality are reinforced through the superintendent's and foremen's daily huddles and schedule
reviews.
Cost Containment
Cost containment and tracking is critical to the success of a project. STG maintains budgets
for all labor, material, and equipment for each project. These categories are tracked and
updated weekly by the project managers. This information is communicated to the field
supervision level for use in making timely, proactive management decisions. The project
manager and field superintendent work closely together to use this reporting system to
identify potential problem work activities and direct resources as required addressing these
problems before they impact the work. This proactive approach prevents us from having to
perform "crisis management".
It is STG's philosophy to deliver the highest level of quality within the industry. Our
employees realize the company's commitment to our clients and our civic responsibility to
the communities in which we live and work. The work that we perform is a reflection of that
commitment.
NW 100 Proposal -City of Bethel AWRG 082806.docPage 56 of 61
Printed on 9/19/2006
Proposal to City of Bethel
NW900 Wind Turbine
HDL Relevant Project Experience
Northern Power
Hattenburg Dilley & Linnell is pleased to present our qualifications for civil, geotechnical
engineering and environmental services for wind energy in Alaska. Our principals are hands-
on project managers who are supported by 17 senior and staff engineers, designers,
engineering technicians and administrative personnel. Our principals and engineers have
experience in designing wind turbine foundations and permitting turbines in Alaska. We
manage all phases of rural energy projects from the concept phase through final completion
of construction. We provide in-house civil, geotechnical, and environmental phase services
for these projects. HDL currently has two term agreements for design of rural energy
projects: one with Alaska Energy Authority and the other with Alaska Village Electric
Cooperative.
The following is a representative listing of our experience:
9. Nunapitchuk/Kasigluk Wind Turbine Civil, Geotechnical Engineering and
Permitting;
10. Hooper Bay Wind Turbine Geotechnical Engineering and Permitting;
11. Alaska Village Electric Cooperative Preliminary Wind Turbine Geotechnical
Engineering and Foundation Alternatives for Various Villages; and
12. Chevak Wind Turbine Civil and Geotechnical Engineering.
HDL is an engineering firm specializing in "client -focused" planning, civil engineering,
transportation engineering, project management, earth science, geotechnical services,
construction administration, and material testing.
Scott Hattenburg and Lorie Dilley started Hattenburg & Dilley in July 2000. Dennis Linnell
joined the firm in March of 2002, creating HDL. Our principals are actively involved with
projects and are hands-on managers. We have structured our firm to produce a quality -
centered, client focused atmosphere to provide you with superior services. Our main office
and U.S. Corps of Engineer certified soils laboratory is located in Anchorage and we
maintain a branch office in Palmer.
HDL maintains a seasoned full-time staff of twenty, including six licensed professional
engineers, one certified professional geologist, two roadway designers, three engineers -in -
training, three civil designers, one engineering technician, and four administrative support
personnel. We use state-of-the-art, field-to-fmish civil software and computer hardware. Our
workstations are equipped with a variety of the latest software including AutoCAD Release
2002 and 2005, Land Development Desktop and Civil Design Software, Microsoft Office,
MS Project, Adobe Photoshop and Illustrator, A Pile and L Pile, All Topo Maps, and Topo
Maps 3D. Our computer drafting personnel are high production graphic oriented technicians
experienced with generating presentation graphics, drawings, engineering plans, and 3-
dimensional graphic products.
NW 100 Proposal -City of Bethel AWRG 082806.docPage 57 of 61 Printed on 9/19/2006
Proposal to City of Bethel Northern Power
NW100 Mind Turbine
Appendix E: Alaska Wind Resource Group Information
NW100 Proposal -City of Bethel AWRG 082806_doePage 58 of 61 Printed on 9/19/2006
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Proposal to City of Bethel Northern Power
NW100 Wind Turbine
NW 100 Proposal -City of Bethel AWRG 082806.docPage 61 of 61 Printed on 9/19/2006
Prepared for, -
John Sargent
Grant Development Manager
City of Bethel, AK
Submitted by:
STG, Inc.
11820 S Gambell Streeet
Anchorage, AK 99515
David E. Myers
Tws
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Proposal To (Co nr,oany'
NW100 141ind Turbines
Pricing and Payment Terms
Northern Po.ver
The installed costs for this project are in line with (fie costa incurred with the two previous
installation-, (Toksook and hasigluk), ,xhich we performed in remotes Alaska. As wilh
Ka-sigluk, the foundations require piles that are augured in like screws. Concrete also needs to
be used to stiffen the base. Thennolsyphons are used to keep theperrna.frost >:roin inciting in the
suntriher. Batrginu in the crane, the conercte equipment, the drill and the aggregate and concreic
adds significant costs to this single turbine proiect. fit wnclusion, we will continues to work at
finding cost savings with the outer projects that we will be conducting in Chevak, blooper Bay,
Savoonga, and lvfeh oryuk in the- summer of 2(}0&
Tb help illustrate: the high costs of construction projects in remote; Alaska, especially for
difficult sites, the product (turbine, controls, and integration) is SI `/G of the total, while the
construct and install piece (including geoiech sui VQys and foundation design) are 49% of the
toiaL A line itern breakdown of these costs call be provided if requested.
Table 5. Construct and Install Wind Turbine
Line Item
(Ali labor, services, materials and work relative to and Line Item Cost
incidental to the items listed)
1. Construction of civil drawings, pile testing and structural
Foundation design, and Electrical Design $58,500
2. Construction and installation of the wind turbine. All
transportation of equipment, foundation materials, disposal,
and clean up of the project. includes all as -bunts and
warrantees. S389A54
3. h1W100 turbine and tower with necessary controls to
connect with the grid. $304,450
_..____.....___.._._.._.._._.._
4. installation and comrihissioning support, rernote monitoring
software. project management and training for site personnel, $47,150
Total for Turnkey Project
$799,554
Usr. oi-dtc�losure of data contairked oil this sheet is subiect try liar re tricti[xr Oft the title p ge of (fie proposal
Page 13 of -30
F, i) €7 ES (.S' LI R
A Distributed Energy, ^w-t'"c•
Systems Company: r''. _,,.NNOW
Northern Power's
NorthWind 100 wind tur-
bine provides cost-effec-
tive, highly reliable renew-
able energy in demanding
environments.
www.northernpowei-.com
The NorthWind® 100
Simplicity by Design
Designed specifically for isolated grid and distrib-
uted generation applications, the NorthWind 100 is
a state of the art, village -scale wind turbine.
Northern Power has drawn on 30 years of experi-
ence to engineer a wind turbine that provides cost-
effective, highly reliable renewable energy in remote
environments.
Meeting the needs of small utilities and independent
power producers, the NorthWind 100 has the fol-
lowing features:
Simplicity
High reliability and low maintenance were the focus
in developing the NorthWind I OO.The design inte-
grates industry proven robust components with
innovative design features to maximize wind energy
capture in severe and remote Iocations.The turbine
features a minimum of moving parts and vulnerable
subsystems to deliver high system availability.The
uncomplicated rotor design allows safe, efficient tur-
bine operation.
• Direct drive gen-
erator eliminates
the drivetrain
gearbox
• Dual fail-safe disk
brake and electro-
dynamic braking
system eliminates
blade brakes
Serviceability
All service activities can occur within the tubular
tower or nacelle housing, providing complete pro-
tection from severe weather conditions. Designated
work areas provide ample room to perform service
activities.
Power Quality
The most common generator utilized in the wind
industry is a gear driven asynchronous (induction)
generator. Induction generators must be connected
to a stable voltage source for excitation and reac-
tive power (VAR) support. While large power grids
can easily provide this support, power quality and
system stability is compromised in distributed gen-
eration and village systems where the power grid is
typically "soft and unbalanced."
Northern Power has solved this issue with the
NorthWind 100. Our synchronous, variable speed
direct drive generator and integrated power convert-
er increases energy capture, while elimi- > d
nating current in -rush during control transitions.This turbine can be
connected to large power grids and remote wind -diesel configurations
without inducing surges, effectively providing grid support rather than
compromising it.
System Description
ti-
The variable speed, stall controlled turbine rotor assembly consists of
three fiberglass reinforced plastic (FRP) blades bolted to a rigid hub,
which mounts directly to the generator shaft.This simple, robust
design eliminates the need for rotating blade tips, blade pitch systems,
and speed increasing gearboxes.
Using a state-of-the-art airfoil design increases the blade's aerodynamic
efficiency and renders them insensitive to surface roughness caused
by dirt build-up and insects.The advanced FRP-resin infusion molding
process ensures a high -quality blade while the cold chamber tested
root connection guarantees it will meet extreme temperature
requirements.
NorthW Ind 100/21 Power Curve
Standard Uen Ry
3 100
80
`m
60
c
a
40
u
b 20
u
to
0
to
0 5 10 15 20 25
Wind Speed at Hub Height (m/s)
Wind Ttxhiw Geamlor 2 =i
i
i
Integral web -based SmartViewTM monitoring system
The direct drive generator is a salient pole synchronous machine
designed specifically for high reliability applications. Electrical output
of the generator is converted to high quality AC power that can be
synchronized to conventional or weak isolated grids.The advanced
power conversion system also eliminates the inrush currents and poor
power factor of conventional wind turbines.
The variable speed direct drive generator/converter system is tuned
to operate the rotor at the peak performance coefficient, and also
allows stall point rotor control to contend with wide variation in air
density found in the target applications.
The safety system consists of a spring applied, pressure released disk
brake mounted on the generator shaft for emergency conditions, and
an electrodynamic brake system that provides both normal shutdown
and emergency braking backup functions.
NorthWind 100/21 Annual Energy Production
Standard Oensiq. Rayleigh Oistribution
500
400
300
a
C 200
C
w 100
0
5 6 7 8 9 10
Annual Average Wind Speed at Hub Height (m/s)
NorthWind 100 Technical Specifications
Design Specifications
Braking Systems
Turbine Class
IEC WTGS Class S
Mechanical Brake
Main Shaft Disc Brake w/ Dual Spring Applied
Design Life
30 year
Calipers
Design Standards
In accordance with IEC 61400-1
Electro-Dynamic Brake
Parking and emergency backup
Performance
Yaw System
Nominal Power Rating
100 kW
Type
Active Upwind
Rated Wind Speed
15 m/s (34mph)
Damping system
Adjustable Friction
Cut -In Wind Speed
4 m/s ( 9mph)
Yaw Drive
Electrically Driven Planetary Gearbox
Cut -Out Wind Speed
25 m/s (56mph)
Yaw Bearing
Slew Ring
Survival Wind Speed
60 m/s (132mph)
Tower
General Configuration
Type
Tubular
Rotation Axis
Horizontal
Hub Height
25/32 m (82/105 ft)
Orientation
Upwind
Material
Steel
Yaw Control
Active
Corrosion Protection
Marine Paint
Number of Blades
3
Hub Type
Rigid
Service Environment
Drive Train
Direct Drive
Tower
Fully Enclosed, Ladder, Safety Climb
Power Regulation
Variable Speed Stall
Nacelle
Fully Enclosed
Rotor
Controller
Diameter
19 m, 20 m
Type
Northern WTGS-100 Controller, Microprocessor -
Swept Area
284 m2, 314 m2
based
Speed Range
45-69 RPM
Functions
Complete Supervisory Control and Data
Speed @ rated power
57 RPM
Acquisition
Structural Configuration
Flange Mounted Blades, Rigid Hub
Remote Control/
Power Regulation
Variable Speed Stall
Monitoring Software
Integrated SmartViewTm Access
Rotor Rotation
Clockwise (Viewed from Upwind)
Power Electronics
IGBT Pulse Width Modulation (PWM) Converter
Coning
0°
Environmental Specifications
Blades
Temperature Operating
Airfoil
5819. 5820, 5821 Series
Range
-46°C to 50°C (-50°F to 122°F)
Material
Fiberglass Reinforced Plastic (FRP)
Lightning Protection
In Accordance with IEC 61024-1
Lightning Protection
Standard Integrated System
Icing/Dust/Dirt
Ice cover to 30 mm (1.2 in)
Seismic Loading
Zone 4
Drive Train
Configuration
Variable Speed Direct Drive
Packages available for specific
site condition such as coastal environment
Tilt Angle
4°
Generator Type
Salient Pole Synchronous
Masses
Insulation Class
NEMA H
Rotor
875 Kg (1,925 Ibs)
Generating Speed
45-69 RPM
Nacelle (excluding rotor)
6587 Kg (14,513 Ibs)
Generator Rating
100 kW w/ 1.15 Service Factor
Tower (25m)
6500 Kg (14,330 Ibs)
Speed Control
Caliper Brake, Dynamic Brake
Northern Power reserves the right to alter turbine specifications at any time.
Grid Connection
Grid Tolerance +10/-15% voltage;+/- 2Hz
Electrical Output 480 VAC, 3 phase, 50/60 Hz
Power Factor Compensation >0.99 PF at rated
Inverter Output Reactive Power +/- 45kVar@480V
Northern Power designs,
builds, installs and
services reliable power
solutions. Since 1974,
we have provided
turnkey energy solu-
tions for industrial,
commercial and gov-
ernment
customers worldwide.
Headquarters:
182 Mad River Park
Waitsfield, VT 05673
Phone: (877) 496-2955
Fax (802) 496-2953
Northern California
Office:
2082 Edison Avenue
San Leandro, CA 94577
Phone: (510) 638-7356
Fax: (510) 638-7394
www.northernpower.com
Copyright 2006, Northern Power. All
rights reserved. Northern Power and
the Yellow N Logo are trademarks of
Northern Power Systems, Inc.
pdb NWI00_3.0ab
J..4 Northern
A Distributed Energy
Sot.— Company
Development
The NorthWind100 turbine was
developed by Northern with sup-
port from cooperating agencies
within the U.S. government,
including the National
Aeronautics and Space
Administration (NASA); the
National Science Foundation
(NSF); the Department of Energy
(DOE); and the DOE -funded
National Renewable Energy
Laboratory (NREL). Siemens -Westinghouse acted as
a subcontractor to Northern in developing the
innovative direct drive generator subsystem.
Turbine certification testing was carried out at the
National Renewable Energy Laboratories National
Wind Test Site at Rocky Flats, CO.This resulted in
Type Testing Conformity Statements, for safety,
loads, performance, noise, and power quality. In
addition, in February 2004, the NorthWind 100
became the first wind turbine to receive a design
conformity statement through Underwriters
Laboratories (UL) to IEC 61400-I.
Northern Power's wind turbines at the South Pole
and the Antarctic coast have operated in more
extreme conditions than any other turbines, includ-
ing winds to 88.5 m/s (198 mph) and temperatures
to -80°C (-I 12°F) This experience gained in harsh,
remote conditions has been incorporated into key
NorthWind 100 design decisions affecting configu-
ration, materials selection, performance characteris-
tics, and deployment procedures.
ADVANCED WIND TURBINE
POWER CONVERTERS
WITH
FLEXPHASETM TECHNOLOGY
Northern
A Distributed Energy
Systems Company
Power Converters for tf e Next Generation of Wind Turbines
Northern Power understands wind energy and our 30 years of expertise is fully reflected in the design and manufacture
of our wind turbine power converters with FlexPhaser' technology. Unlike other converters which are really modified
motor drives, Northern Power designs its converters from the ground up to meet the challenges of variable speed wind
turbine operation. Our FlexPhase technology offers modular components with a very small footprint and 20-year design
life. At the heart of this proprietary technology is an innovative circuit design and control theory which delivers improved
efficiencies and the best voltage ride -through capability in the industry. Northern Power wind turbine converters use a
maximum torque -per -amp control algorithm, which captures the maximum power from generators with minimal losses.
I
0: IWI
L
COMPACT DESIGN
Ai only 5n1 . i,lortlurn Po.v�r's VVT2S00 2.5 l"IVA converter can elsily be configured •.vithin turbine nacelles.
High Reliability by Design
Northern Power's FlexPhase design is based on a distributed controls philosophy for both hardware and control deci-
sion -making. Each wind turbine converter is made from individual FlexPhase modules that contain their own switches,
capacitors, magnetics, controls and sensing. The proprietary power circuit requires fewer capacitors and fewer IGBT
switches due to the magnetics filter and controls. As a result, our modules are inherently more reliable. Each individual
module incorporates remote diagnostics and can be replaced by local field technicians, which greatly reduces mean time
to repair (MTTR).
High Power Density with High Efficiency
FlexPhase technology combines high power density (1MW/meter' for DC -AC converter) with high efficiency.
Fewer switches and smarter decision making yield better energy capture.
Wind Converter Efficiency Comparison
690 Volts Input and Output, 50 or 60Hz, DC bus at 1 150
98.0%
I _ I
C
°—� 97.0%
w
FlexPhase
—Two Level VS C
96.0%
0 500 1000 1500 2000 2500
Output Power in kW
Advanced Reactive Power Control
Specification
Power Rating
1,000 — 5,000 INA
Input voltage,AC
0 — 760 Volts
Output voltage, AC
690Volts (rms)
Output Frequency
50 — 60 Hz
Dimensions
1,000 kVA/m3
Cooling
Liquid or Air
Communications
Multiple options
FlexPhase technology has been designed to withstand the most severe grid and wind farm disturbances.
The converters can provide reactive power with or without the turbine in operation.
• Zero voltage ride -through
• Voltage sag ride -through
• VAR support
• Voltage regulation
• Power quality improvement for weak grids
Improved Performance with Permanent Magnet (PM) Generators
Northern Power's active rectifier converter option allows customers to get more power from their next
generation PM generator designs by enabling operation in a maximum torque -per -amp mode and allowing a
wider speed range. Power modules can easily be used in a number of different configurations.
IGBT
GBT
Rectfier
Inverter
PM
,I+
i
Generator
Diode IGBT
Rectfier Inverter
PM +
Generotor , 11 _ _ JU ti
Diode
IGBT
IGBT
Rectfier
DC to DC
Inverter
PM
Manufacturing and Quality
• More capacity
• Better energy capture
• Enhanced performance
Northern Power manufactures all of its wind turbine converters in its 110,000 square foot facility in Barre,Vermont.
We adhere to strict quality standards and are certified to ISO9001-2000.
History of Reliability
Northern Power has a 25-year history of development in the wind energy market. Most recently, Northern Power was
presented the 2006 American Wind Energy Association Award for Technical Achievement for our power converter develop-
ment. The US Department of Energy has contracted with Northern Power for development of its next generator wind
power converter, and our product team currently offers a variety of power converter, energy storage, and mobile static
compensator systems.
I" Northern
A Distributed Energy
Systems Company
AT GLANCE...
AVEC wanted to reduce its
dependence on expensive
diesel fuel while providing reli-
able power to its remote village
communities
Northern's solution:
Hybrid wind -diesel power
systems that will produce
approximately 1.4 MW of
semi -renewable electricity.
Northern Power Supplies 13 NorthWind® 100 Turbines to
Alaska Village Electric Cooperative
The Alaska Village Electric Cooperative (AVEC)
installed its first Northern Power NorthWind® 100
turbine in the community of Toksook Bay in late
2005 with three NorthWind 100 turbines running in
conjunction with diesel generators in a new power
plant. It is estimated that these turbines will produce
approximately 675,000 kWh annually and could dis-
place approximately 32% of the energy normally gen-
erated by diesel.The majority of the energy pro-
duced by the turbines serves the local electrical load,
but a portion is utilized as a "dump heat" load and is
transferred to the Toksook water plant by way of a
recovered heat loop.
By AVEC estimations, based upon a diesel efficiency
of 13.0 kWh/gallon, and the AVEC 2004 bulk fuel
contract price for diesel of $1.8327 per gallon,
approximately 51,900 gallons of diesel fuel will be
displaced annually resulting in fuel cost saving at 2004
prices of nearly $95,000 per year.
SYSTEM OVERVIEW
Power Application Remote village power
System Type Wind -diesel hybrid systems
utilizing 10 NorthWind IOOs
Location Toksook Bay,Alaska
Kasigluk, Alaska
Customer Alaska Village Electric
Cooperative (AVEC)
System Configuration
• NorthWind 100 IOOkW wind turbines
• Diesel generators
• SmartViewTm monitoring and control software
• Secondary load controller and electric boiler
www.northernpower.com The NorthWind 100 turbines were fabricated at Northern Power's Barre,VT facility then shipped to Alaska. > >
Northern Power designs, Turbine installation was
builds, installs and services completed in late 2005 and
reliable dower solutions.
commissioning activities
completed in early 2006.
Since 1974, we have pro-
AVEC, the Denali
vided turnkey energy solu-
Commission and the Coastal
tions for industrial, com-
Village Resource Fund jointly
funded the project.
mercial and government
customers worldwide.
Headquarters:
182 Mad River Park
Waitsfield, VT 05673 USA
Phone:1-877-496-29SS
Fax: 802-496-2953
Texas Office:
16360 Park Ten Place,
Suite 330
Houston, TX 77084 USA
Phone: I -281-492-8100
Fax: 281-492-8162
Mexico Office:
Periferico Norte No. 51
Interior 4
Colonia Benito Juarez
Cuidad del Carmen, Campeche
C.P.24140, Mexico
www.northernpower.com
Copyright 2006, Northern Power
Systems, Inc.All rights reserved.
Northern Power Systems, the Yellow
N Logo and'power without limits
are trademarks of Northern Power
Systems, Inc.
pib_rem AVEC_1.0let
Northern
A Dist,lb ted Energy
Systems Company
After successful installation
and operation of the
NW 100 in Toksook Bay, AK
the Alaska Village Electric
Cooperative (AVEC)
installed three additional
Northern Power
NorthWind 100 turbines in
the community of Kasigluk.
The installation and commis-
sioning was completed in June 2006.AI1 three units
are running in conjunction with diesel generators in a
new power plant.
Turbine installation, and commissioning activities was
completed in June 2006.AVEC, the Denali
Commission and the Coastal Village Resource Fund
jointly funded the project.
A Northern Power technician completes the installation of a new NorthWind 100
turbine at the Toksook site.
In the summer of 2007, seven additional wind tur-
bines will be deployed the remote Alaskan villages of
Hooper Bay and Chevak.
In Kasigluk, a remote village in Alaska, wind power is having a positive impact on reducing energy costs while also
reducing pollution.