HomeMy WebLinkAbout2022-07-29 IMC Agenda and docs INTERTIE MANAGEMENT COMMITTEE (IMC)
REGULAR MEETING
AGENDA
July 29, 2022 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 24, 2022
7. NEW BUSINESS
A. Annual Meeting and Election of Officers
8. COMMITTEE REPORTS
A. IOC Committee
i. Strategic Planning Update
ii. Asset Management Update
B. Operator’s Report
9. MEMBERS COMMENTS
10. NEXT MEETING DATE – September 30, 2022
11. ADJOURNMENT
Intertie Management Committee Meeting
Operator Report
July 27, 2022
1. Alaska Intertie usage report
a. MWh usage – Measured at Douglas Substation
GVEA MEA Total
i. July – June FY22 199,182 25,061 224,243
ii. July – June FY21 174,622 22,018 196,640
iii. Delta - FY22 to FY21 14.0% 13.8% 14.0%
2. No Alaska Intertie trips to report
Reportable Railbelt Events
3. System Response Summary
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.
Frequency data is sourced from the Teeland Tesla phasor measurement unit. MW data is sourced from
Chugach SCADA, which receives data from other utilities via ICCP.
Event Date MW Tripped High /Low
Frequency
(Hz)
Frequency
Response
(MW/0.1Hz)
138KV NIS-NPS Trip 6/20/22 9.7 MW 60.35 Hz 2.8 MW/0.1Hz
NPP GT2 Trip 7/6/22 37.6 MW 59.50 Hz 7.5 MW/0.1Hz
HLP ST1 Trip 7/20/22 12.9 MW 59.79 Hz 6.1 MW/0.1Hz
69KV GHS-SSS-FWS
and UFLS Event
7/21/22 No Data /
Event Under
Review
60.28 Hz and
58.82 Hz
-