Topic:"Electricity Generation" in M12665

mal generating fleet.115 The forecast of each generating unit Utilization Factor ("UF") over the 10- 115 NSPI, "2025 10-Year System Outlook," July 14, 2025 ("2025 10-Year System Outlook"), Figure 11. year plan, in addition to accounting fo...

AI summary The document discusses NSPI's 10-Year System Outlook, including generating unit utilization factors, the need for generating unit additions and retirements, and transmission expansion planning. It notes that the report does not clarify if the system plan represents the lowest production cost plan and highlights that integrated resource planning is now managed by the IESO.

III.B.2.a. Inputs and Assumptions used with PLEXOS in Fuel and Purchased Power Forecasting To accurately simulate the operation of the NSPI system, including accurate modelling of the transmission security constraints limiting the economic...

AI summary The document details the inputs and assumptions required for PLEXOS modeling in fuel and purchased power forecasting for NSPI. It includes load forecasts, transmission characteristics, fuel prices, generating unit data, operating costs, and emission assumptions.

There were contributing factors to these deviations that were outside of NSPI's control. For example, Surplus Energy from Muskrat Falls was lower than forecasted. This can be seen in the "Imports" row of the following two figures. In 2024,...

AI summary The text discusses deviations in energy supply forecasts due to factors outside NSPI's control, including lower-than-expected surplus energy from Muskrat Falls and underperformance of renewable resources. These deviations required replacement energy from other sources, and the text references specific reports and figures for further details.

Figure X-4: Net Capacity Factors, NSPI Generating Units 391 Thermal Plant 2024 Capacity 2025 Capacity Factor Factor Trenton 5 21.03% 29.22% Trenton 6 43.14% 55.10% Point Tupper 42.85% 52.54% Tufts Cove 1 60.36% 18.85% Tufts Cove 2 49.32% 4...

AI summary Figure X-4 shows a decline in the capacity factors of NSPI's thermal generating units from 2024 to 2025, with most units below 50%. Coal-fired generators saw increased capacity factors in 2025 due to the sulfur emissions compliance CoV received in March 2025, while natural gas units at Tufts Cove experienced a decline.

Figure X-6: Thermal Units' Average Load (MW) 395 Thermal Plant Max Net Capacity Average Load 2024 (MW) Average Load 2025 (MW) Lingan 1 153 86 106 Lingan 2 153 76 46 Lingan 3 148 84 104 Lingan 4 153 82 94 Tufts Cove 1 78 68 34 Tufts Cove 2...

AI summary The text presents data on the average load of various thermal units in Nova Scotia from 2024 to 2025, highlighting the performance of different power plants. It also discusses the economic minimum dispatch levels of these units, indicating how often they were operated at or below this level, which is unusual for baseload units.

Figure X-13: NSPI Thermal Unit Heat Rates (Btu/kWh)422 Thermal Plant Heat Rate (2024) Heat Rate (2025) Lingan 1 11,775 11,382 Lingan 2 12,226 11,304 Lingan 3 11,360 11,059 Lingan 4 11,423 10,236 Tufts Cove 1 11,350 11,548 Tufts Cove 2 10,8...

AI summary The document presents heat rate data for NSPI thermal units in 2024 and 2025, showing improvements in efficiency, particularly for solid fuel-fired generators. The average heat rate for coal in 2024 was 10,777 Btu/kWh, with only Trenton 6 performing better. Natural gas units had lower heat rates, though still higher than newer combined-cycle plants.

X.B.3.g.i. Performance Test Results at Unit 6 During the Audit Period, NSPI conducted a performance test at Unit 6. The tests assessed the unit's real power capabilities at full load pursuant to NERC Standard MOD-025-2. The tests showed th...

AI summary During the audit period, NSPI conducted a performance test at Unit 6, revealing that its gross and net real power outputs were below the NPCC declared values, as per NERC Standard MOD-025-2.

XII.B.1.c.i.2. Reliability Imports In our review of import transaction samples, we noted days during the Audit Period when NSPI imported energy for system reliability purposes. As NSPI has explained to us in the past, all reliability impor...

AI summary During the audit period, NSPI imported energy for system reliability, with transactions sourced from New Brunswick, ISO New England, and Newfoundland and Labrador. The highest-priced reliability import occurred in Allegro at $ /MWh, though the transaction ultimately saved USD $ due to system conditions and real-time pricing.

XV.B.5.b. Comparison of Wind Generation and PHP Load Figure XV-18 provides a comparison over the audit period of 14-day average hourly PHP load and system wind generation. Under ELIADC co-optimization, the expected relationship between the...

AI summary The audit period analysis of wind generation and PHP load under ELIADC co-optimization shows no significant correlation between the two, despite expectations of a positive relationship. Only a weak correlation of 0.14 was observed in the limited data available after a cyber event affected data integrity.