Topic:"Generation Grid Resources" in M12694

Power Production - NS Power maintains and implements its Cold Weather Preparedness plan as outlined in the NERC - Standard, EOP-012-2 "Extreme Cold Weather Preparedness and Operations". Planning and - preparations for the severe weather an...

AI summary NS Power outlines its Cold Weather Preparedness plan aligned with NERC Standard EOP-012-2, detailing pre-event planning, generation fleet hardening, fuel inventory management, and contingency measures like supplemental heating and coal pile management to ensure reliable operations during extreme cold weather.

1 Figure 5 - Hourly Megawatt Flows January 25 and 26 25 January 2026 Hour-Ending: 1:00 2:00 3:00 4:00 5:00 6:00 7:00 8:00 9:00 10:00 11:00 12:00 Net Load 2172 2140 2099 2066 2076 2114 2164 2241 2311 2336 2320 2294 Highlands Export -5 -5 -5...

AI summary Figure 5 presents hourly megawatt flows for January 25-26, 2026, showing net load, exports (e.g., Highlands, East End, Cape Breton), imports (e.g., Onslow, Western, Valley), and wind generation. Data highlights fluctuations in energy distribution across regions, with significant variations in export/import volumes throughout the day.

3.8.1 Generation - The decision was made on January 20th to bring Lingan 2 online on January 24th to support the - fleet and reduce the risk of firm customer load shedding throughout the event. The remainder of - the fleet was available an...

AI summary The decision to bring Lingan 2 online on January 24th was made to support the fleet and prevent load shedding. Other generators had planned outages or temporary issues, including maintenance at Wreck Cove 2 and Victoria Junction 2, derating at Tufts Cove 6 due to freezing, and a startup failure at Burnside 2.

3.8.2 Wind - Wind generation resources performed well during the event. Hourly average wind generation - and forecasts are shown in the following table. DATE FILED: March 6, 2026 Page 19 of 23

AI summary The document notes that wind generation resources performed well during a specific event, with hourly average wind generation and forecasts presented in a table. The text was filed on March 6, 2026, as part of a regulatory proceeding.

1 field, resolving the issue. This device was originally missing from the list of at-risk devices 7 Link operating at 900 megawatts, please provide an estimate of the Maritime Link imports 8 that could be expected in the future events, ass...

AI summary The response discusses the Labrador Island Link (LIL) and its current operational capacity, noting that while increased flows are possible, they depend on factors like generation availability and market conditions. It also clarifies that increased LIL capacity would not affect NS Power's system reserves.

1 Request IR-17: 2 3 (a) Please provide the hourly load forecasts the utility prepared in advance of the 4 January weather forecast that were used for generation dispatch planning. 5 6 (b) Referencing the hourly net load in Figure 5 of the...

AI summary The document includes a request and response related to load forecasts, generation resources, and power supply during a cold weather event in January 2026. The utility provided hourly load forecasts, generation resources, and details about units delayed coming online due to a hydro plant icing issue.

Date: Sun January 25, 2026 HOUR LOAD FORECAST RESERVE REQMT SYSTEM MARGIN PA1 LIN1 LIN2 LIN3 LIN4 TR5 TR6 PT2 TUC1 TUC2 TUC3 TUC6 CT TOTAL IPP TOTAL PT BIO HYDRO TOTAL BESS WIND TOTAL FIRM NB PURCH FIRM NFLD PURCH 21 2287 218 -162 165 148...

AI summary The document presents a detailed table of hourly load forecasts, reserve requirements, and system margins for a specific date, along with various power generation and transmission metrics. It includes data on different power sources such as battery energy storage systems (BESS), wind, and hydroelectric generation, as well as firm purchases from New Brunswick and Newfoundland.

on, it also received emergency energy assistance from Maritime Electric Company Limited via the New Brunswick System Operator as the transmission flow corridor from New Brunswick was fully subscribed. No issues were reported for the Mariti...

AI summary During the January 2026 cold weather event, NS Power received emergency energy support from Maritime Electric via New Brunswick's system operator. The Maritime Link operated successfully, providing reactive support. NS Power increased transmission capacity via BESS and activated Lingan 2 generation. Issues arose with Tufts Cove 6 and Burnside 2, but were resolved. Key grid and generation performance details were reported.

Request IR-8: - Reference page 13, Figure 5, of the report. - The table shows peak Maritime Link imports of just over 250 megawatts in the early evening hours - of January 25, 2026. Given the recent positive test on the Labrador Island Lin...

AI summary Request IR-8 seeks an estimate of future Maritime Link imports under similar conditions to January 25, 2026, and whether the Labrador Island Link's 900 MW capacity would increase NS Power's reserve capacity. The reference is to Figure 5 on page 13, showing 250 MW peak imports on that date.

Request IR-9: - Reference page 17 of the report. - "Pre-event, NS Power's operational power system engineers, with support from the planning team - at the Independent Energy System Operator Nova Scotia (IESO-NS), re-studied stability limit...

AI summary Request IR-9 seeks clarification on how NS Power and IESO-NS established a 45 MW increase in the Onslow South Corridor limit following BESS integration, including battery charging/dispatch planning and the basis for the limit (linked to 100 MW/4-hour BESS capacity).

Request IR-10: - Reference page 18 of the report. - 70W High Street "Rotating feeder outages were initiated at 70W High Street to avoid overload - conditions reaching the protection limit for transmission line L-5545:" … "At 10:41, it was...

AI summary Request IR-10 seeks details on Transmission Line L-5545's capacity during a January cold-weather event, temporary solutions to avoid rotating outages, timeline of actions taken since the issue was identified, and changes to protection settings in 2023. The report references a proposed new substation and adjusted protection settings post-2023.

Request IR-16: Page 20 of 23, Figures 11 and 12 provide hourly average wind generation and forecasts. - a) Please confirm whether the generation forecast was adjusted for cold weather. - i. If not, please provide Figure 11 and Figure 12 wi...

AI summary Request IR-16 asks NS Power to confirm if wind generation forecasts were adjusted for cold weather and to provide both unadjusted and cold-adjusted figures from Figures 11 and 12.

Request IR-17: - a) Please provide the hourly load forecasts the utility prepared in advance of the January weather forecast that were used for generation dispatch planning. - b) Referencing the hourly net load in Figure 5 of the report, p...

AI summary Request IR-17 seeks data on hourly load forecasts, generation resources supplying net load, underutilized resources, and visualizations of January 24-25, 2026, energy supply. The utility is asked to disclose operational details for regulatory review, focusing on generation dispatch and resource availability during specific dates.

on, it also received emergency energy assistance from Maritime Electric Company Limited via the New Brunswick System Operator as the transmission flow corridor from New Brunswick was fully subscribed. No issues were reported for the Mariti...

AI summary During the January 23-26, 2026 cold weather event, NS Power managed grid stability through emergency energy assistance, increased transmission capacity via BESS, and activated Lingan 2 generation. Issues included derated Tufts Cove 6 and failed Burnside 2, though both were resolved. The Maritime Link supported both NLSO and NS Power systems with reactive power.