HomeMy WebLinkAbout2020-07-24 IMC Agenda and docs
INTERTIE MANAGEMENT COMMITTEE (IMC)
AGENDA
9:00 a.m. Friday July 24, 2020
Alaska Energy Authority Board Room
813 W Northern Lights Blvd, Anchorage, AK 99503
To participate dial 1-888-585-9008 and when prompted, enter code 676-392-603#
1. CALL TO ORDER
2. ROLL CALL FOR COMMITTEE MEMBERS
3. PUBLIC ROLL CALL
4. PUBLIC COMMENTS
5. AGENDA APPROVAL
6. PRIOR MINUTES – MAY 29, 2020
7. NEW BUSINESS
A. ELECTION OF OFFICERS
B. OPERATORS REPORT ML&P/GVEA
C. OSCILLATION STUDY REPORT Chair of OC
8. COMMITTEE REPORTS
A. OC REPORT Chair of OC
B. BUDGET TO ACTUAL REPORT AEA
9. MEMBERS COMMENTS
10. NEXT MEETING DATE – SEPTEMBER 25, 2020
11. ADJOURNMENT
IMC/BPMC 2020 Schedule
September 25, 2020
December 11, 2020 IMC approve FY20 refund &
BPMC approve FY20 audit/refund
Intertie Management Committee Meeting
Operator Report
July 24, 2020
1. Alaska Intertie usage report
a. MWh usage – Measured at Douglas Substation
GVEA MEA Total
i. July – June FY19 268,676 22,071 290,747
ii. July – June FY20 123,825 22,732 146,557
iii. Delta – FY20 to FY19 -117% 3% -98%
2. June 4, 2020 Alaska Intertie Trip
a. Douglas 138-1B1 tripped on 6/4/2020 at 9:24 pm with a three phase fault alarm
from Healy. Douglas 1B1 power flow north was 19.3 MW at the time of trip. The
system experienced oscillations for about five minutes following the breaker trip,
and the oscillations were un-damped for most of the period. Frequency reached
a high of 60.543 Hz and a low of 59.526 Hz. Power flow was recorded at UVSS
breaker 552 and shows an oscillating peak to peak power swing of about 30 MW.
b. Douglas 138-1B1 was closed back in at 10:38 pm
3. Maintenance
a. Marker Ball replacement project
i. Phase 1 of the project between Douglas and Cantwell began July 13. The
contractor anticipates completion by July 24, 5 days ahead of the
schedule.
ii. Phase 2 of the project between Cantwell and Healy will follow phase 1
and is expected to begin July 27. Anticipate completion by August 12.
iii. In addition to replacing missing and damaged marker balls, the
contractor is replacing spacers where we have rolled bundles as well as
replacing damaged insulators as they find them.
b. Lidar project
i. Manitoba Hydro expected to perform the aerial LiDAR inspection August
14 - 24
4. IOC quarterly Reliability Report – See attached
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Intertie Management Committee Meeting
Oscillation Study update Report by IOC
July 24, 2020
The Intertie Operating Committee has received the final report from Siemens PTI that provided
a detailed analysis of the low frequency electromechanical oscillations that were observed in
the Railbelt transmission system during four power oscillation events that occurred in 2018.
The report provides corrective actions and remedial solutions to increase the dampening of
dominate interarea oscillation modes.
Based on the results of the study analysis, and considering its corresponding impact and
effectiveness, the following are the most important remedial actions necessary to improve the
damping of the prominent oscillation modes that were identified and evaluated:
1. Tuning existing power system stabilizers
a. As a first and economically effective action, it is suggested to tune the existing
Power System Stabilizers at generation units at Bradley Lake, Nikiski CT, and both
Healy Power Plant Units
2. Addition and tuning of new power system stabilizers
a. A second action and in addition to the tuning of the existing power system
stabilizers, it is highly recommended to add new and properly tuned power
system stabilizers at North Pole and Beluga Power Plants. Due to the high
participation factors of these units in the dominant inter-area oscillation modes,
the addition of well-tuned power system stabilizers on these units provides a
significant and effective improvement on the damping of the targeted oscillation
modes.
3. Enable and tune existing out of service power system stabilizers
a. A third recommended remedial action is tuning and placing in service the
existing out-of-service power system stabilizers at Nikiski CT and Soldotna CT
units.
4. Addition and Tuning of New power oscillation dampening controls at SVCs of Goldhill,
Healy and Teeland Substations
a. A fourth recommended action to be considered is the addition of new power
oscillation dampening controls at the Goldhill, Healy and Teeland SVC’s.
Considering that the tuning of the existing and new power system stabilizers
described in items 1 and 2 above provide an important and effective
improvement on the damping ratio of the dominate interarea oscillation modes,
the addition of new power oscillation dampening controls for these SVC’s is
recommended as a supplementary action to be considered to further increase
the damping of the targeted interarea modes.
5. Tuning of power oscillation dampening controls for Daves Creek and Soldotna SVC’s
a. The results of the study show that only a moderate damping improvement is
obtained by the tuning of current parameters for the power oscillation
dampening controls of SVC’s at Dave’s Creek and Soldotna Substations. Thus, the
tuning of these power oscillation dampening controls has a lower priority
compared to the remedial actions described in action items 1 through 4. The
implementation of this recommendation is not considered strictly necessary,
unless other system operating conditions could show in the future that the
existing settings of these power oscillation dampening controls produce a
negative effect on the damping ratio of the analyzed interarea modes.
6. Disabling the PSS of the GVEA BESS
a. The study results show that the current power system stabilizer settings of the
BESS unit have a detrimental effect on the damping of the targeted interarea
modes. Hence, it is recommended to disable the power system stabilizer of the
GVEA BESS.
At the request of the Intertie Operating Committee, the Systems Studies Subcommittee and the
Machine Ratings Subcommittee are meeting jointly to review the final study and discuss the
implementation of the study recommendations specific to generation resources in the Railbelt.
Additionally, the Systems Studies Subcommittee is providing a written summary of
recommended work that will need to be accomplished, including proposing a schedule to
complete the recommended work. The work will likely require specialized consultant assistance
from an entity that provides field tuning and modeling of power system stabilizers. The
Subcommittees will likely recommend coordination and between the utilities including
standardizing the process. It has also been discussed it may be worthwhile retaining PTI study
consultants for limited support during the field tuning and model efforts. The subcommittees
have been asked to provide an update to the Intertie Operating Committee at their August 6
meeting.
Intertie Management Committee Meeting
Intertie Operating Committee Report
July 24, 2020
1. Intertie Operating Committee (IOC)
a. The IOC has not met since providing our report at the June 30 IMC meeting. Our
next regularly scheduled meeting is August 6.
b. On July 1, the IOC sent to each Subcommittee their specific assignments listed in
Section 2 of this report. The IOC requested they each provide a progress update
to the IOC ahead of our August 6 meeting.
c. IOC committee member assignments
i. Developing overview document to describe ICCP data exchange
requirements for the purpose of providing clear direction to the SCADA
and Telecommunications Subcommittee.
ii. Request AEA provide funding for the Douglas Substation microwave
communication project using the $6.9M grant, if available. ~$500k
project cost.
iii. Developing ShareFile site for IOC and all Subcommittees. The site will be
used to exchange and store information and documentation. Reviewing
to insure security concerns are addressed before proceeding.
d. The IOC Chair provided documentation to Kirk Gibson to assist him with
evaluating the IOC finding for Cantwell Substation ownership and cost sharing
allocation requirements. Kirk will share his findings with the IOC at our August 6
meeting. A final report to the IMC expected at their September 25, 2020
meeting.
2. Subcommittees
a. Dispatch and System Operations Subcommittee
i. Review current Railbelt maintenance scheduling process and reporting
methodology.
ii. Review current IOC Reliability Report for accuracy in providing data as
required by Railbelt Reliability Standards.
b. Engineering, Relay and Reliability Subcommittee
i. Review the attached United States Bulk Power System Executive Order
from the President. Provide initial analysis regarding potential impacts for
the Alaska Intertie asset.
c. Machine Ratings Subcommittee
i. Schedule meeting with the SSS to review Oscillation Study results. Work
with the SSS to determine the implementation of new settings and tuning
requirements for generation resources as required by the study.
d. SCADA and Telecommunications Subcommittee
i. The IOC is working on a document that will provide guidance to the
committee for what information is requested to be included in the ICCP
data transfer. Upon receiving the IOC document, review and provide
feedback to the IOC.
e. Operations, Maintenance and Scheduling Subcommittee
i. Coordinate a joint meeting with the Dispatch and System Operations
Chair to develop a process for insuring upcoming maintenance projects,
including projects that are tentative, are sufficiently coordinated
between the two subcommittees and other groups including the
Northern and Southern Controllers for the Alaska Intertie.
f. Budget Subcommittee
i. No Assignment
g. System Studies Subcommittee (SSS)
i. Provide an implementation plan and schedule as required by the
outcome of the Oscillation Study performed by PTI. Provide plan and
schedule to the MRS chair for review. MRS to schedule a meeting with
the SSS.
ii. Send the June 4, 2020 system event to PTI for the purpose of evaluating
which Railbelt grid resources contributed to the osculation.
Alaska Intertie FY20 Status Report for the Period July 1, 2019 through May 31, 2020
Effective 7/1/19 Budget %(OVER)
Approved 07/01/19 ACTUALS UNDER
FY20 Budget 05/31/20 @ 05/31/20 Budget to Date
REVENUES
GVEA 1,709,506 1,567,047 1,500,319 66,728
ML&P 237,938 218,110 222,751 (4,641)
CEA 258,090 236,583 242,903 (6,320)
MEA 438,503 401,961 419,120 (17,159)
INTEREST / CAPITAL CREDITS - 16,284 (16,284)
TOTAL REVENUES 2,644,037 2,423,701 2,401,376 22,324
EXPENSES
FERC 562 - Station Operation Expenses
GVEA - Substation Electricity Usage 8,000 7,333 9,322 (1,989) Per GVEA
8,000 7,333 9,322 (1,989)
FERC 566 - Miscellaneous Transmission Expense
Private Line Telephone Service for AKI SCADA (GVEA)60,000 55,000 11,255 43,745 Per GVEA
Cell Phone Comm. Svc for Weather Monitoring (Verizon)15,000 13,750 11,020 2,730 Per AEA
SLMS Support and Intertie Ground Patrol 100,000 91,667 78,641 13,025 Per AEA
175,000 160,417 100,916 59,500
FERC 567 - Transmission Expenses - Rents
Rents - Alaska Railroad 700 642 700 (58) Fixed
MEA - Talkeetna Storage 7,200 6,600 6,600 - Fixed
7,900 7,242 7,300 (58)
FERC 569 Maintenance of Structures
MEA - Maintenance of Structures 250,000 229,167 - 229,167 Per MEA
250,000 229,167 - 229,167
FERC 570 - Maintenance of Station Equipment
GVEA - Healy, Cantwell, Goldhill 63,812 58,494 102,530 (44,035) Per GVEA
GVEA - Healy, Teeland, Goldhill Dampers 200,000 183,333 59,016 124,317 Per GVEA
GVEA - SCADA Maintenance Healy, Cantwell, Goldhill 10,000 9,167 - 9,167 Per GVEA
GVEA - Healy SVC Fire Alarm Panel Replacement 15,000 13,750 - 13,750 Per GVEA
GVEA - Cantwell 4S2 Switch Repair 50,000 45,833 - 45,833 Per GVEA
GVEA - Perform Maintenance, repaint Reactors Healy SVC Yard 10,000 9,167 60,414 (51,247) Per GVEA
CEA - Teeland Substation 96,000 88,000 102,696 (14,696) Per CEA
MEA - Douglas Substation 5,000 4,583 53 4,530 Per MEA
CEA - Telecomm Support (Douglas Substation Communications)5,000 4,583 - 4,583 Per CEA
454,812 416,911 324,709 92,202
FERC 571 - Maintenance of Overhead Lines
GVEA - Northern Maintenance 125,000 114,583 22,975 91,608 Per GVEA
GVEA - Northern ROW Clearing 75,000 68,750 89,493 (20,743) Per GVEA
MEA - Special Patrols [Incl Helicopter Inspections]25,000 22,917 - 22,917 Per MEA
MEA - Southern Maint (Incl Ground and Climbing Inspect)340,000 311,667 93,394 218,273 Per MEA
MEA - Southern ROW Clearing 125,000 114,583 2,316 112,268 Per MEA
MEA - Equipment Repair and Replacement 539,818 494,833 16,521 478,312 Per MEA
1,229,818 1,127,333 224,699 902,634
FERC 924 - Property Insurance
AK Intertie - Insurance 42,861 39,289 21,100 18,189
Per AEA (Gen Liab/
Commercial Umbrella) &
MEA (includes Aviation)
42,861 39,289 21,100 18,189
Intertie Operating Costs Total 2,168,391 1,987,692 688,047 1,299,645
FERC 920 - AEA Administrative Costs
Personal Services, Travel and Other Costs 89,000 81,583 58,914 22,669 Per AEA
89,000 81,583 58,914 22,669
FERC 920 - IMC Administrative Costs
IMC Administrative Costs (Audit, meetings, legal)40,000 36,667 9,914 26,753 Per IMC Chair
40,000 36,667 9,914 26,753
FERC 566 - Miscellaneous Transmission Expense
Misc. System Studies 300,000 275,000 69,023 205,977 per IOC
LIDAR Survey 300,000 275,000 - 275,000 per IOC
600,000 550,000 69,023 480,977
Intertie Administration Costs Total 729,000 668,250 137,851 530,399
TOTAL EXPENSE 2,897,391 2,655,942 825,898 1,830,044
SURPLUS (SHORTAGE)(253,354) (232,241) 1,575,479 1,807,720
7/14/2020 1 of 3
Alaska Intertie FY20 Status Report for the Period July 1, 2019 through May 31, 2020
Budgeted Usage Actual Usage to Date
GVEA MEA CEA ML&P TOTAL GVEA MEA CEA ML&P TOTAL
MONTH MWH MWH MWH MWH MWH MONTH MWH MWH MWH MWH MWH
Jul 8,750 2,080 - - 10,830 Jul 14,996 2,164 - - 17,160
Aug 6,300 1,949 - - 8,249 - Aug 17,753 2,039 - - 19,792
Sep 7,500 1,895 - - 9,395 Sep 3,638 1,956 - - 5,594
Oct 10,500 1,548 - - 12,048 Oct 10,207 1,752 - - 11,959
Nov 10,500 1,238 - - 11,738 Nov 9,686 1,774 - - 11,460
Dec 9,100 1,484 - - 10,584 Dec 10,837 1,900 - - 12,737
Jan 11,750 2,061 - - 13,811 Jan 16,001 2,513 - - 18,514
Feb 13,500 1,904 - - 15,404 Feb 14,144 2,046 - - 16,190
Mar 7,000 1,992 - - 8,992 Mar 8,747 2,194 - - 10,941
Apr 32,000 1,685 - - 33,685 Apr 7,630 1,566 - - 9,196
May 7,500 1,944 - - 9,444 May 6,113 1,358 - - 7,471
Jun - Jun -
TOTAL 124,400 19,780 - - 144,180 TOTAL 119,752 21,262 - - 141,014
INTERTIE PROJECTED ENERGY USAGE TO DATE (MWH)144,180 INTERTIE ACTUAL ENERGY USAGE TO DATE (MWH) 141,014
Budgeted Operating Costs for the period Jul 19-May 20 1,987,692$ Actual Operating Costs for the period Jul 19-May 20 688,047$
(based on amended budget)
Budgeted Usage Revenue for the period Jul 19-May 20 1,389,895$ Actual (Billed) Usage Revenue for the period Jul 19-May 20 1,359,375$
(budgeted rate x projected usage)(budgeted rate x actual usage)
Estimated Budgeted Energy Rate per MWH 11.51$
(based on to date budgeted costs and usage)
Annual Budgeted Energy Rate (Billed Rate)9.64$ Projected Actual Energy Rate per MWH 4.07$
(based on minimum contract value)(based on to date actual costs and usage)
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