N-1Report
4 passages
2.1.4 Customer Outreach - Before and during the event, NS Power employed a communication strategy which included a - phased roll out to customers, several customer-facing initiatives and outreach to stakeholders. - Social media posts were...
AI summary NS Power implemented a customer outreach strategy during an extreme cold event, including social media updates, a Grid Status Index webpage, and direct communication with Large Industrial Interruptible Rider (LIIR) customers. Measures highlighted included maximizing generation capacity, using battery storage, and importing electricity. Updates were shared with stakeholders and employees throughout the event.
3.7 Description of System Stability During the Cold Weather Event - During this cold weather event, all System Operating Limits (SOLs) and Interconnection - Reliability Operating Limits (IROLs) were respected and the Nova Scotia power syst...
AI summary During a cold weather event, Nova Scotia's power system maintained stability by respecting all System Operating Limits (SOLs) and Interconnection Reliability Operating Limits (IROLs). Remedial Action Schemes (RAS) were activated to prevent stability issues. The Onslow South corridor's capacity was increased by 45 MW due to new Battery Energy Storage Systems (BESS), avoiding the need for load shedding.
3.8.3 Battery Energy Storage Systems (BESS) The NS Power BESS currently consists of two sites (99W Bridgewater, 132H Spider Lake) with a combined output capability of 100 MW for up to four (4) hours. With the reduction of forecast wind gen...
AI summary NS Power's BESS at Bridgewater and Spider Lake provided 230 MWh and VAR support during a tight supply period, aiding system reliability by maintaining voltages during high load.
DATE FILED: March 6, 2026 Page 22 of 23 1 • The performance of NS Power's generation fleet provided maximum output from 2 all available units. 3 • The addition of BESS was beneficial during the event, providing capacity and 4 reactive powe...
AI summary The document highlights the performance of NS Power's generation fleet, the benefits of BESS during peak load periods, and the absence of firm customer interruptions. It also notes the effective operation of the Labrador Island Link and Maritime Link, localized outages resolved by the engineering team, and coordination with neighboring utilities during an extreme cold weather event.
N-2NSPI (NSEB) RIR 1 to 17
5 passages
1 field, resolving the issue. This device was originally missing from the list of at-risk devices planning team at the Independent Energy System Operator – Nova Scotia (IESO-NS), re-studied stability limits with the addition of new transmi...
AI summary The document discusses the establishment of a new transmission corridor limit after the addition of Battery Energy Storage Systems (BESS) in the Onslow South Corridor. The limit is determined by reactive power and voltage support capability rather than energy storage capacity. The NS Power Marketing group is responsible for managing the charging and discharging of BESS sites.
NON-CONFIDENTIAL Request IR-15: Reference page 21, Figure 13, Grid Battery Usage, of the report. (a) Please provide similar separate tables for each of the two respective battery storage sites. (b) Please explain the reason for the differe...
AI summary The response to Request IR-15 includes a figure showing grid battery usage for two battery storage sites, but does not provide separate tables for each site or explain differences in their performance.
1 (b) Both BESS sites performed well during the January 23-26 Cold weather event. As shown 2 in the above graphs, both sites were fully charged and available for the January 25 evening 3 peak. Each site is designed with a 50 MW capacity fo...
AI summary During the January 23-26 cold weather event, both BESS sites (132H Spider Lake and 99W-Bridgewater) performed well, providing 112 MWh and 118 MWh of energy support respectively during the January 25 evening peak. Both sites have identical configurations and were fully charged and available for the peak. After the peak, both were reduced to '0' MW output by the Energy System Operator.
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.