HomeMy WebLinkAboutCity of Pelican - Pelican Hydroelectric Upgrade Project_2013Pelican Hydro
Upgrade:
Rebuilding
A 70 -Year-
Old Rural
Alaska
Hydro
David Lockard
AEA
The
Pelican
Boardwal
k
Pelican Background and History
•Located on the NW side of Chichagof Island, SE Alaska
•100 miles west of Juneau
•Access by boat and seaplane only
•No runway
•Founded as a commercial fish processing site in 1938
•“Closest to the fish’
•One million pounds of fish processed and frozen in 1942
•More history and photos at Pelican.net
Original
Tank
Farm
(This is
why we
came to
Pelican)
New
Tank
Farm
(Denali
Comm.
Funding
)
Bulk Fuel
Upgrade
Completed
in 2008
Diesel Powerhous
e Upgrade
Completed
in 2008
Denali
Comm.
Funding
(920 kW,
$1,971,000
)
Denali
Commissio
n Staff in
new
Powerhous
e
Pelican Hydro Upgrade Funding
Summary
•2004 Denali Commission Grant, $1,350,000
•2008 Denali Commission grant, $2,274,000
•2008 State Match $300,000
•RE Fund Grant for $1,896,836 Awarded In 2011
•Total: $5,820,836
1940’s Dam
During
Construction
1940’s
Wood
Crib
Dam
1984
Barber
Turbine
and
Flywheel
(550 kW)
Pelican
Lake At
High
Water
1940’s
Woodstave
Penstock
With Blue
Tarp
1984
Hydro
Equipmen
t
1984
Cornell
Pump,
Induction
Motor/
Generator
(100 kW)
1984
Switchge
ar
May 2004
Site Visit
to Plan
Projects
Flume Failure In
2009
Existing
Dam
During
Demolition
Cofferda
m and
Spillway
Intake
Under
Constructio
n
Pumping
Out The
Cofferda
m
Rebuilt
600kW
Barber
Turbine
and 600kW
900rpm
Kato
Generator
Installed
2010
Wing Wall
Under
Constructio
n
Hydro Powerhouse Switchgear and Controls Upgrades: Upgrade existing
switchgear with new PLC with turbine
governor control algorithm and additional
control algorithms to monitor and control
other plant functions including: reservoir level
sensor; remote control of dam site video
cameras, lights and trash rack; both
hydroelectric generator breaker positions; the
turbine main bearing lubrication and water
cooling systems; remote electric boiler
dispatch; and other inputs that may be
required
Turbine Governor Replacement: Replace
existing mechanical/hydraulic Woodward UGHT
turbine governor with an electro-hydraulic control
interface. Install new electronic distributing valve
with servo amp for digital governor interface.
Install new hydraulic actuator with shut-down logic
and flow control. Replace existing mechanical
restoring device with electronic servomotor
position indication. Install new hydraulic system
including servomotor, hydraulic pressure system,
pumps, accumulator and dual hydraulic oil filtration
system. Replace all mechanical linkages between
governor actuator and wicket gate.
Fiber Optic Data Communication Cable:
Communication between the diesel plant PLC and
the hydro plant PLC will be provided by a new
single-mode fiber optic link. Install Figure 8 6-pair
fiber optic cable on existing overhead distribution
system poles between the diesel power plant and
the hydroelectric powerhouse (approximately
3,000 feet total length).
Electric Boilers: A dispatchable electric boiler will
be installed at the Pelican School complex to allow
excess hydroelectric power generation (above
community demand) to displace diesel fuel use for
space and domestic water heating.
600kW, 900RPM Kato Generator Refurbishment: Uncouple, disconnect and
remove generator end from powerhouse. Package and ship out for refurbishment.
Reinstall upon return of unit.
550kW Barber Turbine Refurbishment: Perform complete unit tear down and
rebuild. Remove wicket gate assembly, dress or replace gates as required, replace
stem bushing o-rings, seal plate seals, seal plate o-rings, and seal plate bolts.
Adjust or replace all BLOC clutch assemblies as required. Clean and re-bush
wicket gate fixed levers. Clean and re-bush transfer levers. Install new linkage
pins. Refurbish or replace regulating ring. Clean regulating ring holders, inspect
bearing surfaces and install new bolts. Replace the link shaft between the
regulating ring and the intermediate shaft, including new rod end bearings. Clean
servomotor link and replace bronze bushing. Remove runner from shaft, dress
surfaces as required. Inspect shaft bearing surfaces and machine as required.
Install new mechanical shaft seal and sleeve. Replace main bearings and seals.
Install new oil cooling system on main radial-thrust bearing, including
pump/reservoir, tubing and fan unit.
100kW Cornell Induction Pump Refurbishment: Replace mechanical shaft seal
and sleeve. Replace main bearings and seals. Remove impeller, dress or replace
as required
Planned and Potential Benefits of Hydro in
Pelican
•Electric boiler at school
•Electric heat for water plant building and circulating water system
•Ice machines for commercial and sport fishing (grant-funded,
producing installed in 2012, producing ice in 2013)
•Electric heat for City buildings
•Electric vehicles
•Commercial and interruptible electric rates
•Potential for re-newed and additional fish processing and freezing
Hydro
Runnin
g