Topic:"Planned Outage" in M08929

refine the capacity 15 estimates as required. Changes, if necessary, will be incorporated within future 10-Year 16 System Outlook Reports. 17 18 7.4 Load and Resources Review 19 20 The ten-year Load and Resources Outlook in Figure 22 and F...

AI summary The document discusses the need to refine capacity estimates and updates the 10-Year System Outlook Reports. It highlights a current forecast of a capacity deficit, which is expected to affect only one week in the coming years. NS Power is evaluating the Planning Reserve Margin in the upcoming Integrated Resource Plan (IRP) to comply with NPCC criteria and determine the optimal resource mix.

1 peak load in the near term. The Company expects to be able to manage through this 2 upcoming winter period, and can also find near-term solutions for access to firm capacity 3 if required. NS Power will continue to monitor potential defi...

AI summary The Company is managing near-term peak load and has not accounted for the return of the Tusket CT’s 33 MW capacity in its forecasts. A medium-term outlook is provided in Figure 22, showing available capacity resources compared to customer demand. The planning reserve margin (PRM) is discussed as a measure of generation capacity relative to the NPCC 20% requirement, though it does not account for all system needs such as wind-following and emissions compliance.

37 Attachment 5 - Pre-IRP Deliverables Page 39 of 89 Conclusions ¬ NSPI requires a 17.8% - 21.0% PRM to maintain a 0.1 days/yr loss of load expectation (LOLE) target • Dependent upon the specific portfolio ¬ Dispatch-limited resources such...

AI summary The text discusses the need for a 17.8% - 21.0% PRM (Planning Reserve Margin) to maintain a 0.1 days/yr loss of load expectation (LOLE) target, highlighting the diminishing returns of dispatch-limited resources like wind, solar, and demand response in contributing to ELCC (Effective Load Carrying Capability). It also notes the variability in reliability metrics and the limitations of using LOLE as a sole measure of system reliability.

ectricity sector by incorporating the unique characteristics of dispatch-limited resources such as wind, solar, hydro, battery storage, and demand response into the traditional reliability framework. RECAP calculates reliability metrics by...

AI summary The document discusses the use of RECAP to calculate reliability metrics for the electricity sector, incorporating dispatch-limited resources like wind, solar, hydro, battery storage, and demand response. It also highlights a key finding that NSPI should maintain a planning reserve margin (PRM) between 17.8% and 21.0% to meet a 0.1 days/year loss of load expectation (LOLE) target.

Attachment 17 - Pre-IRP Deliverables Page 17 of 85 « Unplanned forced generator outages « Higher than normal peak loads (i.e. very cold weather in Nova Scotia) « Operating reserve requirements The PRM is a convention that is typically base...

AI summary The document discusses the Planning Reserve Margin (PRM) and its calculation, noting that it is typically based on a comparison of installed generation capacity to the 1-in-2 median peak load. NSPI uses a winter day with -15°C temperatures for forecasting, which approximates this median peak load. PRM requirements vary among utilities depending on system size and diversity.

nd Capacity Value Study As described in Section 1.1, this study provides an update of the required PRM and confirms that a PRM of at least 20% is necessary to meet a target LOLE of 0.1 days/year. As a vertically integrated utility, NSPI is...

AI summary This study updates the required Planning Reserve Margin (PRM) to ensure a target Loss of Load Events (LOLE) of 0.1 days per year. Nova Scotia Power Inc. (NSPI) is responsible for developing an Integrated Resource Plan (IRP) that meets system needs, including the PRM, and submitting it to the Nova Scotia Utility and Review Board (UARB). The study uses E3’s Renewable Energy Capacity Planning (RECAP) model to assess resource adequacy.

en calculate what quantity of planning reserves are required to achieve that reliability target. Planning Reserve Margin and Capacity Value Study, Energy + Environmental Economics, July 2019 2020 IRP FINAL ASSUMPTIONS SET 47 IRP Update App...

AI summary The Planning Reserve Margin (PRM) should be between 17.8% and 21.0% to achieve a 0.1 days/year loss of load expectation (LOLE) target. NS Power will use a base case assumption of 20% PRM and refine it further in the Analysis Plan.

en calculate what quantity of planning reserves are required to achieve that reliability target. Planning Reserve Margin and Capacity Value Study, Energy + Environmental Economics, July 2019 2020 IRP FINAL ASSUMPTIONS SET 47 Nova Scotia Po...

AI summary The document discusses the Planning Reserve Margin (PRM) required by Nova Scotia Power to achieve a 0.1 days/year loss of load expectation (LOLE) target. It states that a PRM range of 17.8% to 21.0% is needed, with 20% being the base case assumption.

hen calculate what quantity of planning reserve are required to achieve that reliability target. Planning Reserve Margin and Capacity Value Study, Energy + Environmental Economics, July 2019 2020 IRP ASSUMPTIONS SET 46 PLANNING RESERVE MAR...

AI summary The document discusses the Planning Reserve Margin (PRM) and its role in achieving a reliability target of 0.1 days/year loss of load expectation (LOLE). Nova Scotia Power proposes maintaining a 20% PRM as the base case and iterating on portfolios to determine specific PRM requirements.

Category Participant Assumption Comment NS Power Response 6. Planning CA Consider whether feeder circuit outages could Distribution Feeder outage events do not affect the Reserve Margin (Chernick & significantly affect DAFOR for any genera...

AI summary The document discusses the impact of distribution feeder outages on the planning reserve margin and energy efficiency (EE) program load shapes. NS Power responds that feeder outages do not affect the capacity value of generation units and will work with E3 to assess modifications to load shapes if EV resources significantly alter assumptions.

Further, the updated PRM calculations completed on the three 2045 resource portfolios showed that the 9% UCAP PRM was sufficient and did not introduce significant excess capacity even under these very different resource portfolios; this pr...

AI summary The updated PRM calculations for 2045 resource portfolios confirm that a 9% UCAP PRM is sufficient and does not introduce significant excess capacity. NS Power has not addressed the future of its combustion turbine fleet in the draft action plan, though it claims the existing fleet is cost-effective.