Topic:"Planned Outage" in M12916

Thermal Retirement Schedule The thermal retirement schedule complies with the 2030 coal phase-out targets. Previous 10-year load and resource outlooks presented retirements of Trenton 5 and Lingan 2 in Winter 2027/2028. Based on the curren...

AI summary The thermal retirement schedule aligns with the 2030 coal phase-out targets. Previous retirements of Trenton 5 and Lingan 2 were planned for Winter 2027/2028, but IESO Nova Scotia now expects these units to remain in service until Winter 2029/2030 to maintain adequate Planning Reserve Margin (PRM) until new fast-acting generation is operational.

- b) For any item identified in the response to part (b) that has does not have a firm delivery date consistent with the target in-service date of 2028, please describe IESO-NS's understanding of any risk mitigation plan for late delivery....

AI summary The response refers questions about the NS-NB Reliability Intertie project to the project owner, Wasoqonatl Transmission Incorporated, and outlines contingency plans for delays in the project's completion by 2028, including potential operation as an electrical island and maintaining system reliability.

Request IR-2: - Referencing Table 2: 2026 Nova Scotia Generation Resources, pdf page 8. - a) Please explain whether all generation facilities listed in the table are fully functional or whether any facilities are subject to planned or unpl...

AI summary The request seeks clarification on the status of Nova Scotia's generation facilities in 2026, including their functionality, any planned or unplanned outages, the duration of unavailability, and available resources to compensate for any shortages.

Request IR-14 Refer to the 2026 Report Section 3.3.1 – Planning Reserve Criteria, page 16, which states that "NS Power studied the appropriate calculation of the PRM in Nova Scotia as part of the 2020 IRP, which confirmed that a 20% PRM ta...

AI summary The document references a 2026 report discussing the Planning Reserve Margin (PRM) target of 20%, as studied by NS Power in the 2020 IRP. It requests whether IESO NS plans to update the PRM study and who is responsible for restudying it, along with the anticipated timeline.

Request IR-8: - Reference : Exh. N-1, Table 9, and Matter M12592 regarding the ECC Dynamic Line Rating (DLR) project with a cost of $7 million, including $5.2 million in NRCan funding. - a) Please explain why this project is not included i...

AI summary Request IR-8 seeks clarification on the exclusion of the ECC Dynamic Line Rating (DLR) project from Table 9, the significance of the project, and its implications on transmission line interruptions, risk mitigation, and potential benefits such as congestion relief and cost savings. It also requests data analysis, evaluation plans, and comparisons with Ambient Adjusted Rating (AAR) solutions.

B. Trenton and Lignan Retirements With respect to the Trenton and Lingan coal units, the Report states: Previous 10-year load and resource outlooks presented retirements of Trenton 5 and Lingan 2 in Winter 2027/2028. Based on the current e...

AI summary The report discusses the retirement timeline for the Trenton 5 and Lingan 2 coal units, noting that they may need to remain in service until Winter 2029/2030 due to the need for reliable replacement capacity. The IESO NS highlights the need for coordination with NS Power and the lack of detailed cost information for maintaining these units.