HomeMy WebLinkAbout2023-07-28 IMC Agenda and docs INTERTIE MANAGEMENT COMMITTEE (IMC) REGULAR MEETING AGENDA July 28, 2023 9:00 AM
Alaska Energy Authority Board Room
813 W Northern Lights Blvd, Anchorage, AK 99503
To participate dial 1-888-585-9008 and use code 212-753-619#
1. CALL TO ORDER
2. ROLL CALL FOR COMMITTEE MEMBERS
3. PUBLIC ROLL CALL
4. PUBLIC COMMENTS
5. AGENDA APPROVAL
6. APPROVAL OF PRIOR MINUTES – June 23, 2023
7. NEW BUSINESS
A. Annual Meeting and Election of Officers
8. COMMITTEE REPORTS
A. Budget to Actuals
B. IOC Committee
C. Operator’s Report
9. MEMBERS COMMENTS
10. NEXT MEETING DATE – September 29, 2023
11. ADJOURNMENT
Alaska Energy Authority
AK Intertie Budget to Actual Revenues and Expenses
DRAFT
07/01/2022 to 06/30/2023
Page 1 of 4
FY23 Approved
Budget
BUDGET
07/01/2022 -
06/30/2023 Actuals
YTD Actuals as a
% of Total
Annual Budget
OVER (UNDER)
YTD Variance
Revenue From Utilities
AKI-GVEA 2,659,180 2,659,180 1,632,895 61%(1,026,285)
AKI-CEA 405,435 405,435 405,435 100%-
AKI-MEA 440,368 440,368 450,409 102%10,041
Total Revenue From Utilities 3,504,984 3,504,984 2,488,740 71%(1,016,244)
Interest - - 58,625 0% 58,625
Total Revenues 3,504,984 3,504,984 2,547,364 73%(957,619)
Total Revenues 3,504,984 3,504,984 2,547,364 73%(957,619)
56200 Station Expenses
Golden Valley Electric
AK Intertie-Substation Electricity Usage - - 478 0%478
Golden Valley Electric Total - - 478 0%478
56600 Misc Transmission Expense
Alaska Energy Authority
AK Intertie-Cell Phone Comm. Svc. for Wx Monitorng 13,000 13,000 10,983 84%(2,017)
AK Intertie-Miscellaneous Studies as Needed 330,000 330,000 - 0%(330,000)
Alaska Energy Authority Total 343,000 343,000 10,983 3%(332,017)
Golden Valley Electric
AK Intertie-Private Line Telephone Service SCADA 10,000 10,000 4,399 44%(5,602)
Golden Valley Electric Total 10,000 10,000 4,399 44%(5,602)
Matanuska Electric Association
AK Intertie-Miscellaneous Studies as Needed 216,000 216,000 13,242 6%(202,758)
Matanuska Electric Association Total 216,000 216,000 13,242 6%(202,758)
56601 Weather Monitoring Batteries
Alaska Energy Authority
AK Intertie-SLMS Support & Intertie Ground Patrol 140,000 140,000 106,932 76%(33,068)
Alaska Energy Authority Total 140,000 140,000 106,932 76%(33,068)
56700 Rents
Alaska Energy Authority
AK Intertie-Alaska Railroad 700 700 1,500 214%800
Alaska Energy Authority Total 700 700 1,500 214%800
Matanuska Electric Association
AK Intertie-Talkeetna Storage 7,200 7,200 6,600 92%(600)
AK Intertie-Equipment Rental - - 102 0%102
Matanuska Electric Association Total 7,200 7,200 6,702 93%(498)
57000 Maintenance of Station Equip
Chugach Electric Association
AK Intertie-Teeland Substation 173,200 173,200 65,070 38%(108,130)
Chugach Electric Association Total 173,200 173,200 65,070 38%(108,130)
Golden Valley Electric
AK Intertie-Healy, Cantwell, Goldhill 75,000 75,000 121,946 163%46,946
AK Intertie-SCADA Maint Healy, Cantwell, Goldhill 5,000 5,000 - 0%(5,000)
AK Intertie-Cantwell 4S2 Switch Repair 156,000 156,000 34,672 22%(121,328)
AK Intertie-Maint & Repaint Reactors Healy SVC Yd 80,000 80,000 4,472 6%(75,528)
Golden Valley Electric Total 316,000 316,000 161,091 51%(154,909)
Matanuska Electric Association
AK Intertie-Douglas Substation 25,000 25,000 - 0%(25,000)
Matanuska Electric Association Total 25,000 25,000 - 0%(25,000)
57100 Maint of OH Lines
Golden Valley Electric
AK Intertie-Northern Maintenance 100,000 100,000 63,914 64%(36,086)
ALASKA ENERGY AUTHORITY
AK INTERTIE BUDGET TO ACTUAL REVENUE AND EXPENSES
FOR THE PERIOD 07/01/2022 THROUGH 06/30/2023
Page 2 of 4
FY23 Approved
Budget
BUDGET
07/01/2022 -
06/30/2023 Actuals
YTD Actuals as a
% of Total
Annual Budget
OVER (UNDER)
YTD Variance
ALASKA ENERGY AUTHORITY
AK INTERTIE BUDGET TO ACTUAL REVENUE AND EXPENSES
FOR THE PERIOD 07/01/2022 THROUGH 06/30/2023
Golden Valley Electric Total 100,000 100,000 63,914 64%(36,086)
Matanuska Electric Association
AK Intertie-Special Patrols (Incl Foundation Insp)10,000 10,000 488 5%(9,512)
AK Intertie-Southern Maint. (Incl Ground Insp)140,000 140,000 18,494 13%(121,506)
AK Intertie-Equipment Repair & Replacement 684,000 684,000 - 0%(684,000)
Matanuska Electric Association Total 834,000 834,000 18,982 2%(815,018)
57102 Maint OH Lines-ROW Clearing
AK Intertie-Northern ROW Clearing 400,000 400,000 20,961 5%(379,039)
Golden Valley Electric Total 400,000 400,000 20,961 5%(379,039)
Matanuska Electric Association
AK Intertie-Southern ROW Clearing 500,000 500,000 525,520 105%25,520
Matanuska Electric Association Total 500,000 500,000 525,520 105%25,520
58306 Misc Admin
AK Intertie-IMC Admin Cost (Audit, Meeting, Legal)20,000 20,000 11,838 59%(8,162)
Alaska Energy Authority Total 20,000 20,000 11,838 59%(8,162)
58401 Insurance Premiums
Alaska Energy Authority
AK Intertie-Insurance 25,000 25,000 22,183 89%(2,817)
Alaska Energy Authority Total 25,000 25,000 22,183 89%(2,817)
Total Total Expense 3,110,100 3,110,100 1,034,647 33%(2,075,453)
Total Operating Expenses 3,110,100 3,110,100 1,034,647 33%(2,075,453)
71001 Total Expense, Budget
Administrative Support Services 200,000 200,000 160,781 80%(39,219)
Alaska Energy Authority Total 200,000 200,000 160,781 80%(39,219)
Total Total Expense 200,000 200,000 160,781 80%(39,219)
Total AEA Administration Expenses 200,000 200,000 160,781 80%(39,219)
Total Expenses 3,310,100 3,310,100 1,195,429 36%(2,114,671)
Surplus (Shortage)194,884 194,884 1,351,936 694%1,157,052
Page 3 of 4
Alaska Intertie FY23 Budget to Actuals Status Report for the Period 07/01/2022 through 06/30/2023
Budgeted Usage Actual Usage to Date
GVEA MEA CEA TOTAL GVEA MEA CEA TOTAL
MONTH MWH MWH MWH MWH MONTH MWH MWH MWH MWH
Jul 32,301 1,918 - 34,219 Jul 10,865 2,252 - 13,117
Aug 36,741 1,968 - 38,709 Aug 19,648 2,239 - 21,887
Sep 37,596 1,951 - 39,547 Sep 21,418 2,080 - 23,498
Oct 40,739 2,003 - 42,742 Oct 35,865 2,205 - 38,070
Nov 35,783 2,269 - 38,052 Nov 16,159 2,213 - 18,372
Dec 35,761 2,455 - 38,216 Dec 16,826 2,535 - 19,361
Jan 35,543 2,139 - 37,682 Jan 13,942 2,363 - 16,305
Feb 30,397 2,018 - 32,415 Feb 36,444 2,162 - 38,606
Mar 33,294 2,171 - 35,465 Mar 20,752 2,355 - 23,107
Apr 38,537 1,906 - 40,443 Apr 13,294 2,132 - 15,426
May 33,177 1,867 - 35,044 May 15,603 2,247 - 17,850
Jun 38,652 1,811 - 40,463 Jun 7,189 1,654 - 8,843
TOTAL 428,521 24,476 - 452,997 TOTAL 228,005 26,437 - 254,442
INTERTIE PROJECTED ENERGY USAGE TO DATE (MWH)452,997 INTERTIE ACTUAL ENERGY USAGE TO DATE (MWH) 254,442
Budgeted Operating Costs for the Period 3,110,100$ Actual Operating Costs for the Period 1,034,647$
(based on amended budget)
Budgeted Usage Revenue for the Period 2,319,345$ Actual (Billed) Usage Revenue for the Period 1,302,743$
(budgeted rate * projected usage)(budgeted rate * actual usage)
Estimated Budgeted Energy Rate per MWH 5.73$
(based on budgeted costs and usage)
Annual Budgeted Energy Rate (Billed Rate)5.12$ Projected Actual Energy Rate per MWH 3.40$
(based on minimum contract value)(based on actual costs and usage)
Page 4 of 4
Intertie Management Committee Meeting
IOC Report
July 28, 2023
1.Intertie Operating Committee
a.On June 17th an underfrequency load shed event occurred. A preliminary report of the
event is being drafted by southern controller, CEA, and will be provided once
completed. Preliminary analysis shows a high oil temperature on CEA’s plant 2, unit 7,
resulted in unit 7 tripping offline. This resulted in the loss of 35 MW and the majority of
CEA’s spin. Since the Alaska Intertie was not connected, the only other remaining spin
was from MEA and HEA, which was not sufficient to prevent UFLS. The system
frequency dropped to approximately 58.94 Hz and stage one UFLS occurred. Additional
information will be provided with the report from the southern controller. The
Dispatch Subcommittee is working with the SSS to develop a draft policy to address how
spinning reserves are allocated and scheduled to help prevent events like this one in the
future.
2.System Studies Subcommittee
a.The SSS presented an update on the sychrophaser project. Utilities are working with
their IT departments to determine how to safely and securely move data. This effort is
anticipated to run through the end of the year. Implementation of EPG’s software will
follow, and implementation is expected to run through the second quarter of 2024.
b.The SSS executed a contract with NREL (National Renewable Energy Laboratories) to
explore the impact of IBRs on the system. The scope includes looking at the impact of
known IBR projects such as solar, BESS, and wind projects that are in the planning or
development stages. Preliminary data collection is planned to run through the third
quarter of 2023. Modeling of the base cases will follow and run through the end of the
year. Once validation of the base cases is complete, modeling of the system with IBRs
will be done. Final modeling and a report on the results will be completed by the
second quarter of 2024.
3.SCADA & telecommunications Subcommittee
a.An agreement between AEA and CEA for the installation of AEA owned communication
between Anchorage and Douglas using AEA provided funds is complete and pending
final signatures from AEA and CEA.
b.The subcommittee is also looking into a project to extend communication between
Douglas and Healy through a similar agreement with AEA. A preliminary scope is being
developed for this project.
4.Dispatch Subcommittee
a.The subcommittee has been assigned the task of drafting a policy on allocation and
scheduling of spinning reserves. The draft policy should be ready be the next IMC
meeting.
Intertie Management Committee Meeting
Operator Report
July 28, 2023
1. Alaska Intertie usage report
a. MWh usage – Measured at Douglas Substation
GVEA MEA Total
i. July – June FY23 228,005 26,438 254,443
ii. July – June FY22 199,182 25,061 224,243
iii. Delta - FY23 to FY22 14.47% 5.49% 13.47%
2. No Alaska Intertie trips to report
Date Event SCADA Indication Cause
No trip events to report
3. IOC quarterly Reliability Report
For generation trips or transmission line trips where the loss of load is known, the Railbelt-wide
frequency response is calculated. The magnitude of the tripped power and the change in frequency
from the pre-trip value to the peak or nadir are used to calculate the MW/0.1Hz value often known as
‘Beta’. Chugach has calculated the Beta for several events and the table of the results is pasted below.
Events without data for the MW magnitude of the trip were excluded, as were events that did not cause
a frequency deviation of greater than 0.2 Hz.
Event Date MW
Tripped
Pre-Trip
Frequency (Hz)
High /Low
Frequency
(Hz)
Frequency
Response
(MW/0.1Hz)
Oscillation Event
6/16-
22/2023 -
Untriggered
Oscillation
0.2Hz/5 sec
period Oscillation Event
Sullivan 7 Trip (UFLS) 6/24/2023 34.3 60.013 58.946 UFLS Stage 1
EGS Unit Trip 7/3/2023 16.1 59.925 59.742 8.8
Nikkels 3 Trip 7/20/2023 17.3 60.017 59.782 7.4
Healy 2 Trip 7/24/2023 51.3 60.039 59.541 10.3
4. Sullivan 7 Trip Event
Sullivan Unit 7 Trip event resulted in a UFLS activation for a 34.3 MW loss of generation. This
appears to be a violation of the reliability standards. Analysis is underway. This is the second
activation of UFLS this summer. Once again indications are the activation was contributed to by
quality of spin issues.
The Alaska Intertie was open for this event. Response was seen by EGS, Soldotna BESS, Nikiski.
However, the total response fell short of the loss by over 10 MW.
Event Description:Sullivan 7 Trip with UFLS
Event Date:6/24/2023
Event Time:18:15:34
IOC Report #
Railbelt Beta:3.2 MW/0.1Hz
Chugach PFR:-2.4 MW/0.1Hz
Pre Event Frequency 60.013 Hz Synchrophasor
Frequency Minimum 58.946 Hz Sullivan 7 Tesla
Frequency Deviation 1.067 Hz
Time to Minimum Sec
Time to Return to 60 Sec
Primary Frequency Response (Beta)
Generator Trip Summary
Frequency Data
EVENT SUMMARY
Only enter data in shaded fields