Topic:"Infrastructure Planning" in M12247

IRP Action Plan Overview

AI summary The document provides an overview of the Integrated Resource Plan (IRP) Action Plan, outlining strategies and initiatives related to resource planning and management. Specific details are not included in the provided text.

Action Plan Items Nova Scotia Power's IRP Action Plan consists of 5 Action Plan Items, some of which include multiple elements: This Annual Report provides an update on each of these Action Plan Items Descriptions of the Action Plan Items...

AI summary Nova Scotia Power's IRP Action Plan includes 5 items with multiple elements. The Annual Report updates progress on these items, referencing an updated 2023 Evergreen IRP Action Plan and Roadmap document. The text contains images and links to additional resources.

For Action Plan/Roadmap Items with the most recent updates included in the Path to 2030 document filed with the 2025 ACE Plan in December of 2024, please see the references below (UARB Matter M12012): Action Plan/Roadmap Item Topic Path to...

AI summary The document outlines updates to the Action Plan/Roadmap Items included in the Path to 2030 document, filed with the 2025 ACE Plan. It references specific sections and pages from the document, including topics such as regional integration, electrification strategy, wind procurement, and demand response programming.

Planning Environment Updates Clean Electricity Regulations – Alignment to Provincial Policy - Roadmap Item 5 Emitting generation is required to balance wind and ensure grid reliability and to meet customer demand - o Level of use of emitti...

AI summary The document outlines Nova Scotia Power's (NSP) alignment of the Clean Electricity Regulations (CER) with provincial policy, emphasizing the need for emitting generation to balance wind energy and ensure grid reliability. It highlights the 80% renewable energy target by 2030, the role of combustion turbines as fast-acting generation, and the CER's support for thermal fleet flexibility.

The following table defines the application of the AEL based on the definition of various units on the system: Type of Unit Description Date AEL starts to apply New Units A unit commissioned on or after January 1, 2025, and that is not a p...

AI summary The table outlines the application of the AEL (Assessment and Evaluation Limit) based on the type of unit and its commissioning date. New units commissioned after 2025 face AEL application starting in 2035 or upon commissioning, while existing units have AEL application dates tied to their commissioning dates and specific regulations.

Planning Environment Updates Components of the CER – Planned Units Roadmap Item 5 - Planned Units - o Planned thermal units (examples: fast acting combustion turbines) are new thermal units in which investments have been made and planning...

AI summary The document outlines exemptions for planned thermal units under the Clean Electricity Regulations (CER). These units, including fast-acting combustion turbines, are exempt from the AEL if they meet construction and commissioning milestones by 2025, 2027, and 2035, respectively, to support variable renewable energy integration.

Planning Environment Updates Clean Electricity Regulations – Impacts on NSP Long Term Strategy Roadmap Item 5 What does this mean for NSP and the Province? - The CER supports and is in alignment with Path to 2030 and the Integrated Resourc...

AI summary The Clean Electricity Regulations (CER) align with NSP's Path to 2030 and Integrated Resource Plan (IRP), allowing existing resource plans to remain compliant. NSP anticipates incremental system costs to meet CER targets, though no changes to the Path to 2030 plan are required. Flexibilities from NS Power's engagement with ECCC support alignment with Evergreen IRP resource plans.

Regional Integration Strategy Action Plan Item 1 This strategy will identify methods of gaining access to firm capacity and low-carbon energy while increasing the reliability of Nova Scotia's interconnection with North America. The key com...

AI summary The Regional Integration Strategy aims to enhance Nova Scotia's access to firm capacity and low-carbon energy while improving interconnection reliability with North America. Key components include monitoring firm capacity imports and advancing the reliability tie project.

Regional Integration Strategy Action Plan Item 1a: Reliability Tie - On April 9th, NS Power filed the Reliability Tie application with the Nova Scotia Energy Board (NSEB) - The scope of the application is to seek approval for the capital s...

AI summary NS Power submitted an application to the Nova Scotia Energy Board (NSEB) on April 9th to approve capital expenditures for constructing a 345kV transmission line and associated infrastructure connecting Onslow, NS to Salisbury, NB.

Electrification Impacts – T&D System Action Plan Item 2c & Roadmap Item 6 As outlined in Roadmap Item 6 , NS Power continues to monitor electrification and load growth, to reflect these impacts in developed load forecasts for Nova Scotia....

AI summary NS Power is analyzing electrification impacts on its transmission and distribution system, leveraging SCADA and AMI data to refine load forecasts, model system peaks, and identify overloaded equipment. Improved modelling techniques now capture varied peak patterns (morning, afternoon, summer) and enable granular feeder-level load reallocation.

Electrification Impacts – T&D System Action Plan Item 2b & Roadmap Item 6 The 2024 load forecast, the Province's Clean Power Plan and the 2024 10 Year System Outlook provide a clear picture of the generation resources required to serve loa...

AI summary The 2024 load forecast, Clean Power Plan, and 10-Year System Outlook outline generation resource needs. NERC TPL assessment identified three corrective actions, including transformer upgrades and corridor adjustments. Overloaded feeders and transformers are expected but manageable within 5-10 years. Detailed studies were completed in 2024, with planning studies prioritized for 2025.

Thermal and CT Investment Roadmap Item 2 Updated sustaining capital profiles are included as an assumption in the ongoing Evergreen IRP update and corresponding modeling work (please refer to the Evergreen IRP assumptions material).

AI summary Updated sustaining capital profiles are incorporated into the Evergreen IRP update and modeling work, reflecting assumptions used in the ongoing Integrated Resource Plan process for Nova Scotia Power.

Thermal investment: The sustaining capital profiles for the thermal units have been updated based on the Evergreen IRP utilization factor approach and the 2030 coal phase out requirements. To maintain resource adequacy while minimizing cap...

AI summary Thermal unit capital profiles were updated using the Evergreen IRP approach and 2030 coal phase-out requirements. Operating restrictions at Trenton 5 limit hours to maintain resource adequacy while minimizing capital investment.

CT investment: The sustaining capital values for the diesel CTs has decreased as compared to the 2020 IRP assumptions for 2023, with 2023 values being lower than 2022 sustaining capital. This confirms the Evergreen modeling approach to ass...

AI summary Sustaining capital values for diesel CTs have decreased compared to 2020 IRP assumptions, with 2023 values lower than 2022. This supports the Evergreen modeling approach assuming ongoing diesel CT fleet operation.

Hydrogen Roadmap Items 3 & 11 NS Power is engaged with the prospective H2 developers is to assess both the impacts of future development on the power system and assess future opportunities for the use of H2 as a green fuel source. - Hydrog...

AI summary NS Power collaborates with H2 developers to evaluate hydrogen's impact on the power system and its potential as a green fuel. A hydrogen tariff is under development for NSEB approval, while the Evergreen IRP assessed hydrogen's role, excluding it as a resource. Future hydrogen fuel pricing will be revisited via the Evergreen IRP process.

Geothermal in NS – Overview Roadmap Item 8 - As part of the Evergreen Integrated Resource Planning (IRP) process, NSP considers both existing/commercially available sources of generation as well as emerging resources when evaluating our lo...

AI summary Nova Scotia Power (NSP) evaluates geothermal energy as an emerging resource in its Integrated Resource Plan (IRP) up to 2050. Research highlights geothermal's potential for direct heat use and grid-scale electricity via enhanced systems, though the latter remains in global pilot phases. This inclusion supports NSP's long-term electricity strategy.

Geothermal – Conclusion Roadmap Item 8 Based on these observations and discussions with geothermal developers, the following is noted for reflecting and evaluating geothermal in NS Power's long-term planning work: - More temperature and se...

AI summary The document outlines the need for more temperature and seismic data in Nova Scotia to assess geothermal potential, notes the need for updated cost assumptions in future Integrated Resource Plan (IRP) work, and highlights that commercialization of Enhanced Geothermal Systems (EGS) is unlikely before 2030.

Small Modular Reactors (SMRs) Roadmap Item 8 - As part of the emerging resources modeled in the Evergreen IRP, Small Modular Reactors (SMRs) were included as potential resources for consideration in the future. - There have also been two m...

AI summary The document discusses the inclusion of Small Modular Reactors (SMRs) in the Evergreen Integrated Resource Plan (IRP) as potential future resources. It highlights legislative updates in Nova Scotia (Bill 404 - Energy Reform 2024 Act) and the Federal Government's SMR Action Plan aimed at promoting SMRs as part of a low carbon future. No immediate IRP update is required, but NS Power will monitor SMR developments.

Hydrogen Enabled Combustion Turbines (CTs) Roadmap Item 8 - In addition to modeling a generic domestic hydrogen production plant load, the availability of a domestic source of hydrogen fuel for the CTs was also enabled in the Evergreen IRP...

AI summary The document discusses updates to the Evergreen Integrated Resource Plan (IRP) regarding hydrogen-enabled combustion turbines (CTs), including current manufacturer capabilities for hydrogen blending, retrofitting requirements, and capital cost adders. The updated information does not necessitate an IRP update, but NS Power will continue monitoring the resource as part of Roadmap Item 8.

Hybrid Peak Electrification Scenario Action Item 4b - As part of the electrification study, a hybrid heating electrification profile was assessed: - o Represents the peak load reduction associated with retaining back up heating sources (na...

AI summary A hybrid peak electrification scenario was assessed as part of the Evergreen Integrated Resource Plan (IRP), demonstrating value in reducing system costs and resource capacity requirements. NS Power is committed to participating in further studies led by Net Zero Atlantic to assess the cost and benefits of the hybrid approach, with work continuing into 2025.

Evergreen IRP Roadmap Item 7 - The most recent Evergreen IRP Action Plan and Roadmap was released on [August 8](https://irp.nspower.ca/files/key-documents/annual-evergreen-materials/Evergreen-IRP-Update-to-IRP-Action-Plan-and-Roadmap-2023....

AI summary The document outlines the progress made by NS Power in preparing for future Evergreen Integrated Resource Plan (IRP) updates. It mentions the need for an updated Effective Load Carrying Capability Study (ELCC), advancements in renewable integration based on the IBR report, and monitoring policy changes such as the Clean Electricity Regulations (CER). The NSIESO is required to initiate an IRP within one year of Bill 404 coming into force.

2025 Evergreen IRP Action Plan and Roadmap Update (NSEB M12247) NSPI Responses to Consumer Advocate Information Requests

AI summary The document outlines the 2025 Evergreen Integrated Resource Plan (IRP) Action Plan and Roadmap Update (NSEB M12247) and includes NSPI's responses to information requests from the Consumer Advocate. The update likely involves strategic planning for energy resources and customer-related initiatives.

2025 Evergreen IRP Action Plan and Roadmap Update (NSEB M12247) NSPI Responses to Consumer Advocate Information Requests

AI summary The document outlines NSPI's responses to information requests from the Consumer Advocate regarding the 2025 Evergreen IRP Action Plan and Roadmap Update (NSEB M12247). It provides details on NSPI's approach to integrated resource planning and related initiatives.

2025 Evergreen IRP Action Plan and Roadmap Update (NSEB M12247) NSPI Responses to Consumer Advocate Information Requests 1 Request IR-2: 2 3 RE: Action Plan Item 2b 4 5 Please provide a description of data that NS Power monitors, or antici...

AI summary NSPI responds to a request for information on data monitored to understand electrification impacts. The response references the 2025 IRP Action Plan Update and mentions the use of annual load forecasts, SCADA, and AMI data for monitoring. Some data, like interconnection requests, are accessible on the NS Power Oasis site.

OASIS Nova Scotia Power 2025 Evergreen IRP Action Plan and Roadmap Update (NSEB M12247) NSPI Responses to Consumer Advocate Information Requests

AI summary Nova Scotia Power Inc. (NSPI) has provided responses to information requests from the Consumer Advocate regarding the 2025 Evergreen Integrated Resource Plan (IRP) Action Plan and Roadmap Update, identified as matter M12247.

Date Filed: July 15, 2025 NSPI (CA) IR-3 Page 1 of 2 2025 Evergreen IRP Action Plan and Roadmap Update (NSEB M12247) NSPI Responses to Consumer Advocate Information Requests

AI summary This document outlines NSPI's responses to consumer advocate information requests related to the 2025 Evergreen IRP Action Plan and Roadmap Update, which is part of the NSEB M12247 matter.

REDACTED 2025 Evergreen IRP Action Plan and Roadmap Update CA IR-3 Attachment 1 Page 1 of 3 REDACTED (CONFIDENTIAL INFORMATION REMOVED)

AI summary This document is a redacted update to the 2025 Evergreen IRP Action Plan and Roadmap, part of a Nova Scotia regulatory proceeding. It includes confidential information removed, with context provided on acronyms and canonical topics for analysis.

2022 Evergreen Pricing Date Contract NG Market NG Future Contract NG LFO May-29 Jun-29 Jul-29 Aug-29 Sep-29 Oct-29 Nov-29 Dec-29 Jan-30 Feb-30 Mar-30 Apr-30 May-30 Jun-30 Jul-30 Aug-30 Sep-30 Oct-30 Nov-30 Dec-30 REDACTED 2025 Evergreen IR...

AI summary The document discusses the 2022 Evergreen Pricing and the 2025 Evergreen IRP Action Plan and Roadmap Update, focusing on geothermal generation potential in Nova Scotia. It includes a request and response from NSPI regarding the need for additional data and funding for geothermal development.

NON-CONFIDENTIAL 1 Response IR-5: 2 3 (a-c) Please refer to Section 3.2.7 in the 2025 10-Year System Outlook for an update on the 4 generation capacity.1 status and timing of the fast-acting 5 6 (d) NS Power has not pursued updates since t...

AI summary NS Power has not updated its generation capacity plans since the project was transferred in September 2024, as outlined in M12012. They are not currently re-evaluating investment between resources for 2030 targets but will do so as part of the next Integrated Resource Plan (IRP) conducted by the NSIESO. Fast-acting generation is highlighted for its firm capacity value in enabling coal unit retirement.

1 NS Power 2025 10 Year System Outlook report (M12386), July 14, 2025, p.22. 2 NS Power 2025 ACE Plan (M12012), December 9, 2024, Appendix H, p.35 of 54 2025 Evergreen IRP Action Plan and Roadmap Update (NSEB M12247) NSPI Responses to Cons...

AI summary The text references several regulatory filings, including the NS Power 2025 10 Year System Outlook report and the 2025 ACE Plan, as well as the Evergreen IRP Action Plan and Roadmap Update. These documents are part of a regulatory proceeding and include responses from NSPI to consumer advocate information requests.

NON-CONFIDENTIAL 1 not be undertaking an update to the relative rate impact comparison document from the 2 2020 IRP at this time. Date Filed: July 15, 2025 NSPI (CA) IR-7 Page 2 of 2

AI summary NSPI states it is not updating the relative rate impact comparison document from the 2020 Integrated Resource Plan (IRP) at this time. The filing date is July 15, 2025, and the document is labeled as non-confidential.

NON-CONFIDENTIAL Request IR-2: Please provide the Renewable Electricity Standard (RES) contributions by renewable energy source, and the corresponding installed capacity by renewable energy source, for the year 2024. And, please provide th...

AI summary The document outlines requests and responses regarding the Renewable Electricity Standard (RES) contributions and thermal asset generation profiles for 2024, 2030, and 2035. The responses reference the 2025 10-Year System Outlook report and the Evergreen IRP scenario for compliance forecasts and data sources.

NON-CONFIDENTIAL 1 Request IR-1: 2 3 Reference: N-1, IRP Action Plan Update – Clean Electricity Regulations – Impacts on 4 NSP Long Term Strategy, p. 16. 5 6 (a) What is the "current policy" referenced here? 7 8 (b) NSPI notes it anticipat...

AI summary The document outlines regulatory requests and responses regarding environmental policy measures, renewable energy targets, and system planning. It references the Clean Electricity Regulations, the 80% renewable energy standard, and the integration of the Reliability Intertie into the Evergreen Integrated Resource Plan (IRP).

[nspi-combined-interconnection-request-queue(pdf).pdf](https://www.nspower.ca/docs/default-source/pdf-to-upload/nspi-combined-interconnection-request-queue(pdf).pdf?sfvrsn=d56d149_88) IR SIS Status COD 826 System Impact Study in Progress 1...

AI summary The document discusses questions raised regarding sustaining capital values for diesel CTs, specifically addressing decreased values, investment amounts in VJ-1, variations in sustaining capital, and failed starts at Burnside 3. The response highlights the economic rationale for maintaining CTs based on 2020 IRP forecasts.

Peak Load Hour 2035-01-09 18:00 Installed Capacity (MW) 1179 1634 1571 463 1017 603 1879 1043 1961 752 918 451 534 232 124 245 7 397 305 996 2406 1263 1884 1697 1114 396 479 85 432 96 347 80 341 1 Request IR-2: 2 3 Please describe the curr...

AI summary The document outlines the Integrated Resource Plan (IRP) goals for wind power generation capacity in Nova Scotia, aiming for 1,000 MW by 2030 and between 500 MW and 900 MW by 2035. It also mentions the Clean Power Plan's alignment with these goals and the progress made through the Rate Base Procurement program and Power Purchase Agreements.

NON-CONFIDENTIAL 1 Request IR-3: 2 3 Please describe the current IRP results for installed energy storage capacity (e.g., Battery 4 Energy Storage Systems (BESS), Pumped Storage Hydro (PSH), and Long Duration Energy 5 Storage (LDES) (MW an...

AI summary The document discusses Nova Scotia Power's Integrated Resource Plan (IRP) results for energy storage capacity by 2030 and 2035, including Battery Energy Storage Systems (BESS), Pumped Storage Hydro (PSH), and Long Duration Energy Storage (LDES). It also mentions the assumptions used in the IRP analysis and how they have been updated recently.

NON-CONFIDENTIAL 1 Request IR-1: 22 (b) Please refer to Dept. of Energy IR-009 from the NS-NB Reliability Intertie Project 23 application proceeding (M12217). For convenience the response has been reproduced 24 below: 25 26 27 28 29 30 31...

AI summary The document references a request related to the NS-NB Reliability Intertie Project, noting that Phase 2 discussions are not currently underway. The focus remains on Phase 1, with Phase 2 work and import/export opportunities yet to be determined.

1 import/export opportunities from a Phase 2 are not being factored into NS Power's resource or transmission planning at this time.[1](#page-6-0) 2 1 DOE IR-009, NS-NB Reliability Intertie Project application proceeding (M12217), May 30, 2...

AI summary NS Power has identified overloaded feeders and substation transformers in its 2024 Feeder Assessment and System Load Snapshot reports, which are expected to become overloaded within the next 5-10 years. These assessments are directional and not detailed in terms of capital requirements, but they guide further planning studies to identify necessary upgrades and evaluate alternative solutions.

This report provides a moment in time summary of substation loading (and an estimation on average feeder loading) for the system peak that occurred February 21st, at 7:30am. This 2024 System Snapshot is used to flag potential substation, f...

AI summary This report provides a snapshot of substation and feeder loading during the system peak on February 21st, 2024, identifying transformers operating above 100% of their nameplate rating and feeders with average loading above 300A. It outlines methods used to determine loading conditions and discusses how Distributed Energy Resources (DERs) affect substation load calculations. The report also references the Capital Expenditure Justification Criteria for transformer upgrades.

Distribution Planning Priorities The following distribution planning priorities are recommended from the results of the feeder assessment: - 1. Complete full planning studies for the following areas in 2025, considering expected transforme...

AI summary The document outlines five distribution planning priorities for 2025, including completing studies for specific areas, initiating preliminary assessments, refreshing a study for the Dartmouth 69 kV Loop, long-term planning for Halifax Peninsula growth, and monitoring impacted areas. Collaboration with HRM and development of a CYME model are emphasized.

Priority Capital Work There are several outstanding planning recommendations that are required to address existing and forecasted feeder overloads. These capital items are summarized in the following three recommendations: - 1. Monitor the...

AI summary The document outlines three priority capital work recommendations to address existing and forecasted feeder overloads, including new substation construction, feeder extensions, and re-prioritization of 12 kV conversion work.

- New Auburndale Substation by 2026 1 Request IR-6: 25 vintage to operate using 35 percent hydrogen blending. New units offered on the market 26 are capable of using up to a 35 percent hydrogen blend. To achieve 100 percent hydrogen 27 ble...

AI summary The text discusses the New Auburndale Substation project by 2026 and mentions the use of hydrogen blending in new units, which can operate with up to 35% hydrogen. Retrofitting may be required to achieve 100% hydrogen blending. A 10% capital cost adder was included in the 2023 Evergreen IRP for a natural gas-fired aeroderivative CT to enable 100% hydrogen operation.

1 Request IR-1: 2 3 Regarding NS Power's plans regarding the addition of thermal combustion turbines. 4 5 (a) Has NS Power had any conversations with CT suppliers to collect updated pricing and 6 timelines for new thermal resources? 7 8 (b...

AI summary The document contains two requests and responses related to NS Power's procurement plans and rate impact analysis. Request IR-1 asks about conversations with CT suppliers regarding thermal combustion turbines, and the response indicates that NS Power has not engaged with suppliers since the NSIESO took over procurement. Request IR-2 asks for an updated rate impact analysis based on the Evergreen IRP, with a reference to another part of the document.

NON-CONFIDENTIAL 1 Request IR-4: 2 3 Refer to Exhibit N-1, 2025 Evergreen IRP page 20 of 42, stating that "NS Power will continue 4 to monitor opportunities for near-term firm imports over existing and planned transmission 5 infrastructure...

AI summary The document discusses NS Power's ongoing monitoring of potential firm import opportunities through existing and planned transmission infrastructure, referencing the 2023 Evergreen IRP and previous engagement with Hydro-Quebec, including a studied 550MW import.

NON-CONFIDENTIAL 1 Request IR-1: 2 3 Reference: Extent of new modeling in support of Action Plan update. 4 5 (a) State whether NSP conducted any new capacity expansion or production cost 6 modeling as part of this IRP Action Plan and Roadm...

AI summary The document outlines a request for information regarding the extent of new modeling conducted by NSP in support of an IRP Action Plan and Roadmap update, including how modeling results were used, whether new modeling was conducted post-Clean Electricity Regulations, and whether the update incorporates recent load forecasts and DSM plans.

(c) NS Power is not aware of how the NSIESO will determine the specific quantity or timing of new battery energy storage resources. (d) The Clean Power Plan indicates up to 600 MW of new fast acting generation by 2030. This is in alignment...

AI summary NS Power is unaware of how the NSIESO will determine the quantity and timing of new battery energy storage resources. The Clean Power Plan aligns with the 2025 10-Year System Outlook report, which highlights the need for up to 600 MW of new fast acting generation by 2030, based on the most recent load forecast and the 2023 Evergreen IRP.

1 Request IR-4: 2 3 Reference: Clean Electricity Regulations, slides 8-16. 4 5 (a) Describe if and how the CER treatment of new versus planned units will impact future 6 actions related to near-term procurement of thermal generators. 7 8 (...

AI summary The text discusses responses to requests regarding the Clean Electricity Regulations, fuel conversions, and fast-acting generation. NS Power indicates that procurement of thermal units has been transferred to NSIESO, there have been no updates on fuel conversions, and the need for 600 MW of fast-acting generation is based on modeling scenarios and decarbonization goals.

Duties of IESO - 10 (1) In furtherance of the objects of the IESO, the IESO shall - (a) develop terms of reference for and carry out an integrated resource planning exercise as required; - (b) carry out competitive procurements of energy r...

AI summary The IESO is mandated to conduct integrated resource planning, execute competitive energy procurements aligned with the Province's 2030 Clean Power Plan, enforce market rules, and manage transmission interconnection processes. It must base initial planning on NSPI's most recent integrated resource plan submitted to the Utility and Review Board.

Integrated resource planning exercises - 11 (1) The IESO shall commence its first integrated resource planning exercise within one year following the coming into force of this Section. - … (3) The IESO shall file the results of its integra...

AI summary The IESO is required to conduct its first integrated resource planning exercise within one year of the regulation's effective date (October 24, 2024) and file results with the Energy Board. The NSIESO did not file a notice of intervention in this proceeding.

Transition to the Nova Scotia Independent Energy System Operator As noted in prior IRP Updates, NS Power must meet important environmental targets by 2030, which include the phase-out of coal-fired generation and achieving 80% of its sales...

AI summary Nova Scotia Power (NSP) must transition integrated resource planning (IRP) functions to the Nova Scotia Independent Energy System Operator (NSIESO) by 2027 to meet 2030 environmental targets. The NSIESO will assume system planning and procurement responsibilities starting Q4 2025, with full transition by Q2 2027. Stakeholders emphasize urgency in continuing IRP work during the transition, while Synapse recommends procedural considerations for NSIESO’s first IRP.

NS Power's IRP-related studies and activities Synapse expressed concerns that NS Power has not conducted new IRP modeling since the 2022/2023 Evergreen IRP study and that it is important not to delay the process of conducting the next IRP...

AI summary Synapse raised concerns that NS Power has not conducted new IRP modeling since the 2022/2023 Evergreen IRP study, emphasizing the need for updated studies to inform the next IRP. Key factors requiring updates include load forecasts, battery storage developments, and import capacity from New Brunswick by 2029/2030.

Conclusion The Board directs NS Power to conduct the ELCC study without delay and to continue its participation in the Net Zero Atlantic Hybrid Peak study. The Board also directs NS Power to provide an update by May 31, 2026, on the status...

AI summary The Board mandates NS Power to conduct the ELCC study and continue participation in the Net Zero Atlantic Hybrid Peak study, with a May 2026 update deadline. It also accepts NS Power's Evergreen IRP Update. Key entities include NS Power and regulatory board members.

April 30, 2025 Crystal Henwood Regulatory Affairs Officer/Clerk Nova Scotia Energy Board 1601 Lower Water Street, 3rd Floor P.O. Box 1692, Unit "M" Halifax, NS B3J 3S3 Re: M11307 – Nova Scotia Power Inc. – 2023 Evergreen Integrated Resourc...

AI summary Nova Scotia Power Inc. submits an update to its 2023 Evergreen Integrated Resource Plan (IRP) Action Plan & Roadmap for the Nova Scotia Energy Board's review. The document is also publicly available on NS Power's website.

May 23, 2025 Mark Peachey, LL.B. [[email protected]](mailto:[email protected]) Manager, Regulatory System Planning & Innovation Nova Scotia Power Inc. 1223 Lower Water Street Halifax, NS B3J 2W5 Dear Mr. Peachey: M12247 – Nova...

AI summary Nova Scotia Power Inc. filed an update to its 2025 Integrated Resource Plan (IRP) Action Plan and Roadmap. The Board will conduct a paper hearing, setting timelines for stakeholder interventions, information requests, and submissions. Participants from prior matters M10504 and M11307 have formal standing, with opportunities for new intervenors.

(902) 422-9663 [[email protected]](mailto:[email protected]) WWW.NATURALFORCES.CA TO: The Nova Scotia Energy Board ("Board") AND TO: Nova Scotia Power Inc. ("NSPI") RE: M12247 - Nova Scotia Power Inc: 2025 Evergreen IRP Action Plan...

AI summary Natural Forces requests intervenor status in M12247 to ensure renewable energy is properly represented in NSPI's 2025 Evergreen IRP. The intervenor highlights their 300 MW renewable portfolio and commitment to supporting NSPI's renewable targets, emphasizing the need for accurate modeling of renewable supply in the IRP.

NOVA SCOTIA ENERGY BOARD IN THE MATTER OF: The PUBLIC UTILITIES ACT -and- IN THE MATTER OF: a review of the 2025 EVERGREEN IRP ACTION PLAN AND ROADMAP UPDATE of NOVA SCOTIA POWER INCORPORATED

AI summary The Nova Scotia Energy Board is reviewing the 2025 EVERGREEN Integrated Resource Plan (IRP) Action Plan and Roadmap under the Public Utilities Act, with Nova Scotia Power Incorporated submitting an update to its plan.

June 13, 2025 Nova Scotia Energy Board c/o Crystal Henwood, Regulatory Affairs Clerk Transmitted electronically to: [[email protected]](mailto:[email protected]) Dear Ms. Henwood, RE: NSEB Matter No. M12247 – Nova S...

AI summary Marine Renewables Canada notifies the Nova Scotia Energy Board of its intent to participate in Matter M12247, concerning Nova Scotia Power Inc.'s Evergreen IRP Action Plan & Roadmap Update. The organization represents tidal, offshore wind, and other renewable energy stakeholders.

NOVA SCOTIA POWER INCORPORATED – 2025 Evergreen IRP Action Plan and Roadmap Update

AI summary Nova Scotia Power Incorporated provides an update to its 2025 Evergreen Integrated Resource Plan (IRP) Action Plan and Roadmap, outlining strategies for energy resource planning and regulatory compliance.

NOVA SCOTIA ENERGY BOARD IN THE MATTER OF: THE PUBLIC UTILITIES ACT - and - IN THE MATTER OF: AN APPLICATION by NOVA SCOTIA POWER INCORPORATED (NS Power) 2025 Evergreen IRP Action Plan and Roadmap Update NON-CONFIDENTIAL INFORMATION REQUES...

AI summary The Nova Scotia Energy Board has issued a non-confidential information request to Nova Scotia Power Inc. (NS Power) regarding their 2025 Evergreen Integrated Resource Plan (IRP) Action Plan and Roadmap Update. Responses are due by July 15, 2025, with contact details provided for follow-up.

Request IR-1: - On page 13 regarding pooling allowable emissions, NS Power stated: - The ability to share emissions "room" amongst units allows for: - The shift of dispatch to our lower cost and lower emitting units (e.g. Tufts Cove) by tr...

AI summary NS Power's Request IR-1 discusses emissions sharing among generating units, capital expenditure reductions through efficient fleet use, and impacts on the preferred resource plan. Questions seek clarification on emissions cost data, capital expenditure reductions, and effects on the resource plan.

Request IR-2: - Regarding Planned Units, on page 14 NS Power stated: - o Planned thermal units (examples: fast acting combustion turbines) are new thermal units in which investments have been made and planning has been advanced in good fai...

AI summary Request IR-2 seeks clarification on whether planned thermal units in the Evergreen IRP meet criteria for exemption from AEL and details the required progression milestones by 2025.

Request IR-4: - On page 20, NS Power stated that the Reliability Tie (Stage 1 Onslow to Salisbury) has a future - potential firm import capacity of 100 MW. However, NS Power has also stated that the Reliability - Tie is essentially a backu...

AI summary NS Power claims the Reliability Tie (Stage 1) has 100 MW future potential firm import capacity but clarifies it serves as a backup to the existing 345 kV tie line, not for increasing imports. Questions seek clarification on reconciling this statement and Stage 2's capacity.

Request IR-5: - On page 23, NS Power stated that " The 2024 Feeder Assessment and 2024 System Load - Snapshot reports have identified feeders and substation transformers that are overloaded or - expected to become overloaded within the nex...

AI summary The regulator is requesting copies of the 2024 Feeder Assessment and System Load Snapshot reports from NS Power, which identified overloaded or soon-to-be overloaded feeders and transformers in the grid.

Request IR-6: - On page 27, NS Power stated that " The sustaining capital values for the diesel CTs has decreased - as compared to the 2020 IRP assumptions for 2023… " - a) Please explain the factors contributing to the decreased sustainin...

AI summary Request IR-6 seeks clarification from NS Power on changes in sustaining capital values for diesel CTs, noting a decrease from 2020 IRP assumptions in 2023, a nearly doubling of values in 2024, and projected trends for 2025 and beyond. The inquiry focuses on factors influencing these changes and their alignment with the Integrated Resource Plan.

Request IR-7: - On page 39, NS Power provided the following statements: - Today manufactures can support between 5% and 35% hydrogen blending. - Current models would need to be retrofitted to operate using 100% hydrogen as a fuel source. •...

AI summary NS Power states current models require retrofitting for 100% hydrogen operation but not 35% blending. The 10% capital cost adder for hydrogen-capable turbines aligns with the Evergreen IRP. Questions seek clarification on retrofit needs for 35% blending and the 10% assumption's basis (hydrogen vs. diesel CT costs).

1 Request IR-1: Reference: Extent of new modeling in support of Action Plan update. - 2 a. State whether NSP conducted any new capacity expansion or production cost 3 modeling as part of this IRP Action Plan and Roadmap update. - i. If yes...

AI summary The document requests information on NSP's new modeling for the IRP Action Plan update, including capacity expansion, production cost modeling, compliance with Clean Electricity Regulations, use of recent load forecasts and DSM Plan, and reference to Matter M12217.

Request IR-2: Reference: The Path to 2030 - 2024 Update, pages 5-6, new NSIESO: 9 8 - 10 a. Describe the transition process as it relates to NSIESO taking on modeling 11 responsibilities for the next IRP, given that NS Power is currently w...

AI summary Request IR-2 seeks clarification on NSIESO's transition to model the next Integrated Resource Plan (IRP), including confirmation that NSIESO—not NS Power—will conduct all new modeling. NS Power is currently updating the ELCC study to support the IRP.

Request IR-3: Reference: The Path to 2030 - 2024 Update, Figure 1 - 2030 Clean Power Plan Resources, page 7, including footnotes 3 and 4; and Figure 2 – Nova Scotia's 2030 Clean Power Plan (October 2023), page 14. 16 - a. Confirm, or expla...

AI summary Request IR-3 seeks clarification on the alignment of the updated Action Plan with the 2030 Clean Power Plan, specifics of battery storage modeling, and discrepancies in timing for Stage 2 fast-acting generation resources between the IRP and Clean Power Plan timelines.

Request IR-6: Reference: The Path to 2030 – 2024 Update, page 35, fast-acting generation. a. State the current megawatt need and year of need for new fast-acting generation that is included in the current action plan and the basis for that...

AI summary Request IR-6 seeks clarification on the current megawatt requirement and timeline for new fast-acting generation included in the Path to 2030 – 2024 Update. The request, filed on June 24, 2025, asks for the basis of this need and timing, referencing page 35 of the document.

17 Request IR-2: 18 19 RE: Action Plan Item 2b 20 21 Please provide a description of data that NS Power monitors, or anticipates monitoring, to 22 understand trends in electrification impacts. If available, please provide those data. For e...

AI summary NS Power requests data on electrification impacts, including interconnection and upgrade requests, overloaded facilities, and mitigation efforts. The request seeks insights into trends related to grid infrastructure and system reliability.

26 Request IR-3: 27 28 RE: Roadmap Item 2 29 30 (a) Please provide a summary of NS Power's seasonal fuel price forecast through 2030. 31 32 (b) Please provide a discussion of the current operational practices with respect to dispatch of 33...

AI summary Request IR-3 includes three parts: (a) requesting NS Power's seasonal fuel price forecast through 2030; (b) inquiring about operational practices for dispatching natural gas, HFO, and LFO; and (c) asking about the IRP's considerations for sustaining capital investment in thermal infrastructure. The request focuses on fuel forecasting, dispatch practices, and infrastructure planning.

13 Request IR-5: - 17 (a) Please provide an update on the status of the fast-acting generation capacity. - 19 (b) What is the role of the NSIESO in planning and procuring the fast-acting generation 20 resources? - 22 (c) Is the fast-acting...

AI summary Request IR-5 seeks updates on fast-acting generation capacity status, NSIESO's role in planning/procuring resources, delays in timelines, gas turbine contract delivery periods, market assessments, and NS Power's evaluation of BESS vs fast-acting generation investments. Questions focus on scheduling, procurement processes, market dynamics, and infrastructure planning.

1 M12247 2 3 NOVA SCOTIA ENERGY BOARD 4 5 IN THE MATTER OF: The Public Utilities Act, 6 7 8 - and - 9 10 IN THE MATTER OF: a review of the 2025 Evergreen IRP Action Plan and Roadmap 11 update of Nova Scotia Power Incorporated. 12 13 14 15...

AI summary The Nova Scotia Energy Board has issued an information request (IR-1) to Nova Scotia Power Inc. (NSPI) regarding the 2025 Evergreen Integrated Resource Plan (IRP) Action Plan and Roadmap update. Responses are due by July 15, 2025, and the request was issued by the Nova Scotia Small Business Advocate.

- Regarding NS Power's plans regarding the addition of thermal combustion turbines. - a) Has NS Power had any conversations with CT suppliers to collect updated pricing and timelines for new thermal resources? - b) If so, please provide a...

AI summary The text inquires about NS Power's engagement with CT suppliers regarding updated pricing and timelines for thermal combustion turbines and whether this information would affect the Integrated Resource Plan (IRP) analysis.

Request IR-3: - Please provide an assessment of the implication of the province's offshore wind objectives on NS - Power's long-term resource plan and provide all analysis on the financial and operational impacts.

AI summary Request IR-3 seeks an assessment of how Nova Scotia's offshore wind objectives impact NS Power's long-term resource plan, including analysis of financial and operational implications. The request focuses on evaluating alignment between provincial renewable energy goals and NS Power's strategic planning.

Request IR-8: Refer to Exhibit N-1, 2025 Evergreen IRP, page 16 of 42, which states that "The use of emitting generation beyond 2035, which was demonstrated to be part of the low-cost resource plans in the Evergreen IRP, continues to be pe...

AI summary Request IR-8 questions whether the Evergreen IRP's modeling constraints included emissions offset costs or compliance specifics under the Clean Electricity Regulations (CER). It seeks details on how these factors were represented in the 2025 plan's low-cost resource scenarios.

Request IR-11: - Refer to Exhibit N-1, 2025 Evergreen IRP page 22 of 42, stating that "… the annual load forecast - has also been used to better understand system peak on a more granular level by reallocating the - load at the feeder level...

AI summary Request IR-11 seeks clarification on data sources used in the 2025 Evergreen IRP's annual load forecast and their implications for long-term resource planning, specifically referencing granular system peak analysis via feeder-level load reallocation.

Request IR-14: Refer to Exhibit N-1, 2025 Evergreen IRP, page. 23 of 42, stating that "More detailed studies to support the NERC TPL and NPCC Area Transmission Review requirements were completed in 2024." Please provide these studies.

AI summary The request refers to a 2025 Evergreen Integrated Resource Plan (IRP) exhibit, which states that studies supporting NERC TPL and NPCC Area Transmission Review requirements were completed in 2024. The request seeks these studies.

Request IR-15: Refer to Exhibit N-1, 2025 Evergreen IRP page 26 of 42, listing six new projects selected under the Green Choice Program (GCP): Yellow Birch; Melvin Lake; Rhodena; Blueberry Acres; Sugar Maple and Eigg Mountain. - a) Please...

AI summary Request IR-15 seeks the expected in-service dates for six Green Choice Program (GCP) projects (Yellow Birch, Melvin Lake, etc.) and a comparison of their capacity addition schedules with the Evergreen IRP's assumptions.

Request IR-16: Refer to Exhibit N-1, 2025 Evergreen IRP, page. 33 of 42, regarding the development of the hydrogen tariff. - a) What is the current status of the hydrogen tariff? - b) Has NS Power collaborated with hydrogen project develop...

AI summary Request IR-16 seeks information on the status of a hydrogen tariff, collaboration with developers, draft materials, and progress summaries. It references the 2025 Evergreen IRP, page 33 of 42, and focuses on NS Power's role in hydrogen tariff development.

Request IR-17: - Refer to Exhibit N-1, 2025 Evergreen IRP, page 41 of 42, regarding the Net Zero Atlantic study.

AI summary The document references Exhibit N-1 from the 2025 Evergreen Integrated Resource Plan (IRP), specifically page 41 of 42, which discusses the Net Zero Atlantic study. This highlights the connection between the IRP and broader climate and energy goals.

- a) Please provide an update on the status of that study and the expected completion date. 2 implications for NS Power's resource planning process? 3 i) If so, please explain the implications. 4 5 Request IR-18: 6 Refer to Exhibit N-1, 20...

AI summary The text includes a request for an update on the status of a study and its expected completion date, as well as questions regarding the implications of a transition of IRP responsibilities to NSIESO and communication between NS Power and NSIESO.

19 1 2025 M12247 2 NOVA SCOTIA ENERGY BOARD 3 IN THE MATTER OF: The Public Utilities Act 4 5 IN THE MATTER OF: An Application by Nova Scotia Power Incorporated 2025 Evergreen IRP Action Plan and Roadmap Update 6 7 INFORMATION REQUESTS To:...

AI summary The Nova Scotia Energy Board has issued information requests to Nova Scotia Power Incorporated regarding the 2025 Evergreen IRP Action Plan and Roadmap Update, specifically inquiring about the 'current policy' referenced and the anticipated incremental system costs associated with meeting new Clean Electricity Regulations targets.

- 6 (a) If there is a scope of work that has been prepared, please provide. Did 7 NSPI have any input into the scope? If not, is NSPI satisfied that the work 8 will meet the needs of the utility and its ratepayers for planning purposes? -...

AI summary The text includes questions regarding the scope of work for a committee, the involvement of NSPI, the schedule for deliverables, and whether NSPI has updated the Relative Rate Effect Model appended to the 2020 IRP Final Report.

(902) 422-9663 [[email protected]](mailto:[email protected]) WWW.NATURALFORCES.CA TO: The Nova Scotia Energy Board ("Board") Date: June 24, 2025 RE: M12247 - NS Power: Evergreen IRP Action Plan and Roadmap Update To whom it may conc...

AI summary The letter submitted to the Nova Scotia Energy Board includes formal information requests regarding the Evergreen IRP Action Plan and Roadmap Update. It seeks data on generation capacity, supply mix, wind power and energy storage scenarios, and assumptions used in the IRP analysis for various energy storage technologies.

C ONTENTS 1. SUMMARY OF FINDINGS 2. Background 3 3. 2025 Action Plan Update 6 3.1. Changes to Electricity Planning Environment 7 3.2. Progress Updates on Action Plan Items for 2024/2025 to Date 8 3.3. Progress Updates on Roadmap Items for...

AI summary The document provides a summary of findings from a regulatory proceeding, outlining key points such as the lack of justification for 600 MW of new CTs by 2030, the need for a new Evergreen IRP, and discussions on reliability tie and Mersey matters.

The Nova Scotia Energy Board ("NSEB") engaged Synapse Energy Economics ("Synapse") to review Nova Scotia Power Inc.'s ("NS Power" or "NSPI") 2025 Integrated Resource Plan (IRP) Action Plan Update. The following comments outline Synapse's a...

AI summary The Nova Scotia Energy Board commissioned Synapse Energy Economics to review Nova Scotia Power Inc.'s 2025 Integrated Resource Plan Action Plan Update. Synapse provided an overview of its findings and will discuss them in detail in the report.

Misalignment of new combustion turbine additions between the IRP and other planning documents The Action Plan Update continues to reference 600 MW of new combustion turbine (CT) resource by 2029/2030.[1](#page-2-0) Synapse identifies the d...

AI summary The text highlights a discrepancy between the 600 MW of new combustion turbine (CT) capacity projected in the Action Plan Update and the 450 MW in the Evergreen IRP's preferred scenario. Synapse notes that other planning documents, like the 10-Year System Outlook and Path to 2030 reports, also reference 600 MW, conflicting with the IRP. NS Power has not rigorously modeled drivers affecting CT resource needs by 2030.

2023 Evergreen IRP In 2019 and 2020, NSPI conducted an extensive IRP process, the first since 2014.[11](#page-4-4) Its 2020 IRP was submitted in November of 2020. Through the IRP process, NS Power identified Action Plan and Road Map items...

AI summary NSPI conducted an IRP process in 2019-2020, with the 2020 IRP submitted in November 2020. The 2022/2023 Evergreen IRP was triggered by changes in environmental policy, load, and resource assumptions since 2020. NSPI submitted the updated Evergreen IRP in August 2023, reflecting comprehensive modeling updates.

3.2025 ACTION PLAN UPDATE NSPI recently filed an update to its 2023 Evergreen IRP Action Plan.[16](#page-7-0) This is the fourth annual Action Plan Update. It contains information on changes to the electricity planning environment, as well...

AI summary NSPI updated its 2023 Evergreen IRP Action Plan in 2025, relying on the 2025 10-Year System Outlook and Path to 2030 reports but omitting recent load forecasts and capacity modeling. Critics note it failed to justify increased CT usage in resource plans or compare updates to the 2023 IRP. The plan aligns with the Nova Scotia Clean Power Plan’s 600 MW fast-acting generation target by 2030.

3.2. Progress Updates on Action Plan Items for 2024/2025 to Date - Regional Integration Strategy: NSPI filed the Reliability Tie application with NSEB on April 9, 2025, seeking to build the Reliability Tie identified in its 2023 Evergreen...

AI summary NSPI filed a Reliability Tie application with NSEB in April 2025, aligning with its 2023 Evergreen Action Plan. NS Power notes a 136 MW reduction in 2030/2031 firm winter peak load forecasts between the 2023 and 2025 10-Year System Outlook Reports, citing improved data from SCADA and AMI systems for electrification planning.

3.3. Progress Updates on Roadmap Items for 2024/2025 to Date - Existing thermal unit cost updates: NSPI has updated cost profiles for sustaining capital investment for its existing thermal units. These will be incorporated in future IRP mo...

AI summary NSPI has updated thermal unit costs for future IRP modeling, engaged with hydrogen developers, assessed geothermal potential, and monitored SMR policy changes. Hydrogen blending data and SMR legislation did not trigger IRP updates, while geothermal requires more data and is unlikely to be commercialized before 2030.

3.4. Related Matters and Plans Outside of the IRP matter, NSPI has presented forward-looking resource and generation plans in other places, including the Path to 2030 Update, its recent Reliability Intertie Application, and the 2023, 2024,...

AI summary NSPI has presented forward-looking resource and generation plans in various documents, including the Path to 2030 Update and 10-Year System Outlooks, but none of the changes in these plans resulted from resource planning modeling, except for the Evergreen IRP work and an abbreviated modeling effort in the Reliability Tie case.

Table 1. Related Documents and Efforts Release Date Document Description June 30, 2023 2023 10-Year System Outlook Based on 4/30/23 load forecast update and the Evergreen IRP modeling results August 8, 2023 2023 IRP Based on modeling condu...

AI summary The document outlines a series of related documents and efforts in Nova Scotia's energy sector, including system outlooks, integrated resource plans, electrification reports, and reliability studies. These documents are based on load forecasts and modeling updates conducted over several years, with ongoing stakeholder engagement and revisions to project scopes.

4.1. No justification for 600 MW of new CTs by 2030 Synapse finds that NS Power seems to minimize its own IRP modeling implications in the Evergreen IRP case when it comes to near-term projected CT builds. Namely, NSPI presents new CT addi...

AI summary Synapse argues that NS Power's 600 MW CT build projection by 2030 lacks justification, contradicting its own Evergreen IRP model (which shows 450 MW) and the CPP (which supports only 300 MW pre-2030). NS Power cites load forecast changes but ignores other studies and factors.

Table 2. New CT Capacity as Percent of Firm Peak Load in IRP, 10-Year System Outlook reports and Reliability Intertie modeling 2030 Nameplate Capacity New CT Capacity as Percent of Firm Peak 2023 IRP 20% 2023 System Outlook 29% 2024 System...

AI summary Table 2 presents the percentage of new combustion turbine (CT) capacity relative to firm peak load in various planning documents, including the Integrated Resource Plan (IRP) and 10-Year System Outlook reports, as well as Reliability Intertie modeling. The data shows varying percentages from 20% to 29% across different years and models.

4.2. A new Evergreen IRP – as soon as possible Given the uncertainty around projected firm capacity resource needs by and beyond 2030, a new Evergreen IRP is necessary to appropriately include all the factors that will impact such an estim...

AI summary A new Evergreen Integrated Resource Plan (IRP) is urgently needed to address uncertainties in Nova Scotia's capacity needs beyond 2030. The transition of IRP responsibilities from NSPI to the IESO under Bill 404 requires a robust NSPI IRP Update to guide the IESO until its first IRP is completed. Key studies like ELCC and Net Zero Atlantic must inform the IRP, along with updated assumptions on resource costs and load projections.

4.4. Mersey Roadmap Item 2 is Sustaining Capital. In the section of the Action Plan Update pertaining to this item, NSPI provides updates on thermal resources and does not provide any updates on sustaining capital investments at the Mersey...

AI summary Mersey Hydro System provides 35 MW firm capacity and 220 GWh/year of renewable energy. NSPI notes that the next IRP should evaluate alternatives like wind and battery storage for cost-effectiveness, referencing the 2025 ACE Plan for sustaining capital details. Historical IRP modeling favored New Brunswick imports over local capacity in 2020.

5.RECOMMENDATIONS Synapse remains concerned that NSPI has stated in various documents that it expects to have 600 MW of CT capacity by 2030 but has not shown this as an outcome of the IRP or the IRP updates. Enough has changed since NSPI c...

AI summary Synapse expresses concern that NSPI's claim of 600 MW CT capacity by 2030 lacks IRP alignment. Recommendations emphasize updating the Evergreen IRP with new data, evaluating resource options, and carefully assessing CT capacity economics. Scenarios must consider Mersey rehabilitation costs and regional coordination with New Brunswick Power.

August 13, 2025 Crystal Henwood Clerk of the Board Nova Scotia Energy Board 1601 Lower Water Street, 3rd Floor Halifax, NS B3J 3S3 Re: M12247 - Evergreen IRP Action Plan and Roadmap Update – Refile of Natural Forces IR-1 Attachment 1 Dear...

AI summary Nova Scotia Power (NS Power) corrected an error in the '2030 – Curtailment Peak' tab of Natural Forces IR-1 Attachment 1, resubmitting the corrected document in PDF and Excel formats after discovering misaligned generation values in Wind, Solar, and other columns. The correction relates to the Evergreen IRP Action Plan and Roadmap Update proceeding.

NS Power should expedite completion of supporting analysis for the next IRP There are multiple key IRP assumptions that will need to be updated prior to the next IRP, and NS Power should use its expertise to support the development of the...

AI summary The document urges NS Power to expedite updates to CT price assumptions and complete the ELCC study for the next IRP. NS Power has delayed updating CT cost estimates, citing NSIESO's procurement role, but the document argues NS Power is best positioned to provide accurate Nova Scotia-specific data. The ELCC study's scope was finalized in July 2025, but no consultant has been engaged yet.

Offshore wind has uncertain impact on future portfolio One particular planning issue of note is the future of offshore wind in Nova Scotia. The province has set a target to lease 5 gigawatts (GW) of offshore wind by 2030; 12 has produced a...

AI summary Nova Scotia's offshore wind target of 5 GW by 2030 is highlighted, but offshore wind is not included in the selected Integrated Resource Plan (IRP). NS Power notes it as a candidate resource but excluded in scenarios. The analysis calls for NS Power to propose methods to assess offshore wind's impact on the resource portfolio, as NSIESO will handle future IRP analysis.

(902) 422-9663 [[email protected]](mailto:[email protected]) WWW.NATURALFORCES.CA - 3.1. As it relates to the relative cost of new firm capacity resources, assumptions that have been used to model Pumped Storage Hydro (PSH) in the c...

AI summary Natural Forces argues that the current Integrated Resource Plan (IRP) overestimates the cost of TPSH due to shorter assumed lifespans and urges broader modeling of non-BESS storage. It also highlights TPSH's local economic and environmental benefits over BESS, requesting the Board to consider 'sustainable prosperity' in IRP decisions even if projects aren't 'lowest cost.'

Review of NS Power's 2025 IRP Action Plan and Roadmap Update

AI summary The document outlines the review of NS Power's 2025 Integrated Resource Plan (IRP) Action Plan and Roadmap Update, focusing on strategic initiatives and implementation timelines for energy resource planning in Nova Scotia.

Prepared for the Nova Scotia Consumer Advocate August 18, 2025 John D. Wilson, Grid Strategies LLC NS Power's 2025 IRP Update is generally reasonable, but the Board should direct NS Power to initiate work – to be completed by the NSIESO –...

AI summary The 2025 IRP Update by NS Power is deemed reasonable but requires the Board to mandate immediate IRP modeling by NSIESO, prioritizing fast-acting generation procurement. Urgency is emphasized to avoid delays in system planning during administrative transfers.

1. Update to Evergreen IRP The NSIESO expects to assume responsibility for system planning, transmission interconnection, and energy and capacity procurement functions in Q4 2025. 1 Synapse Recommendation 1 appropriately points to the need...

AI summary The document outlines updates to the Evergreen Integrated Resource Plan (IRP), emphasizing NSIESO's upcoming role in system planning by Q4 2025. It highlights the need to evaluate Mersey's economic prudence, complete ELCC studies, and align the IRP with the Reliability Tie project. The Board is urged to expedite IRP modeling to avoid delays, even as NS Power transitions responsibilities to NSIESO.

2. Stage 2 of the NS-NB Reliability Intertie Project Application Similar to the Evergreen IRP, NS Power does not identify a schedule for the Stage 2 Reliability Intertie. This resource has been identified as critical to increasing access t...

AI summary NS Power has not provided a timeline for Stage 2 of the NS-NB Reliability Intertie Project, citing the need for 'further study.' The project is deemed critical for enhancing market access and reliability, with calls to analyze it in the next Evergreen IRP update due to reliance on costly peak resources like HFO- and LFO-fueled units.

3. Procurement Schedule for Fast-Acting Generation Project In its 2025 10-Year System Outlook, NS Power states that it does not expect the 300 MW of new thermal generation expected for 2027 in-service will be available for the 2027-28 wint...

AI summary NS Power faces delays in thermal generation, requiring 600 MW of fast-acting generation to be procured simultaneously rather than in stages. The 2025 Outlook lacks updated system modeling, and Synapse highlights factors like ELCC studies and load forecasts influencing capacity needs. Updated IRP modeling is urged to avoid inefficient investments and adjust procurement decisions.

19 August, 2025 NOVA SCOTIA ENERGY BOARD C/O CRYSTAL HENWOOD ([email protected]) Dear Ms. Henwood, RE: Intervenor Submission – Evergreen IRP Action Plan & Roadmap Update (M12247) Energy Storage Canada (ESC) is the national trad...

AI summary Energy Storage Canada (ESC) submits that curtailed renewable electricity in 2030 presents an opportunity to enhance energy security through storage. ESC supports Synapse's call for evaluating alternatives to fossil fuels, recommending lithium-ion batteries, pumped storage, compressed air, and thermal storage as firm capacity options.

2025 Evergreen IRP Action Plan and Roadmap Update NS Power Reply Submission September 4, 2025

AI summary This document is NS Power's reply submission to the 2025 Evergreen Integrated Resource Plan (IRP) Action Plan and Roadmap Update, filed on September 4, 2025.

NON-CONFIDENTIAL 1 TABLE OF CONTENTS 2 3 1.0 INTRODUCTION 3 4 2.0 TRANSITION OF THE IRP TO THE NSIESO 4 5 3.0 SYNAPSE SUBMISSION 8 6 4.0 CONSUMER ADVOCATE SUBMISSION 12 7 5.0 SMALL BUSINESS ADVOCATE SUBMISSION 14 8 6.0 SOLAR NOVA SCOTIA SU...

AI summary The document outlines the submission process for Nova Scotia Power Inc.'s 2025 Evergreen Integrated Resource Plan (IRP) Update, including stakeholder responses and comments from various entities such as the Consumer Advocate, Small Business Advocate, and Energy Storage Canada. The Consumer Advocate generally supports the IRP Update as reasonable.

not allow for delay of critical system planning work to begin while the NSIESO transfer process is completed.[3](#page-3-2) DATE FILED: September 4, 2025 Page 4 of 19 Synapse Submission, Re: Comments on Nova Scotia Power's 2025 Integrated...

AI summary The transition of IRP responsibilities to NSIESO raises concerns about potential planning gaps during the transfer. Submissions highlight uncertainty in the transition timeline and the need for continuous system planning. NSIESO has initiated steps like establishing a Board of Directors and filing its first Expenditure and Revenue Requirement application (M12412).

SBA Submission, Re: M12247 - Nova Scotia Power Inc. (NS Power) - 2025 Evergreen IRP Action Plan and Roadmap Update, August 19, 2025, page 1. NSIESO, IN THE MATTER OF an application by the Nova Scotia Independent Energy System Operator for...

AI summary The document discusses the transition of Integrated Resource Planning (IRP) responsibilities from Nova Scotia Power Inc. (NS Power) to the Nova Scotia Independent Energy System Operator (NSIESO) by October 2025. NS Power will continue to advance IRP-related work and assist NSIESO during the transition. The timeline for this transition is outlined in the NSIESO's Expenditure and Revenue Requirements application.

those activities, such that there is no gap in work required to set-up the NSIESO for success. Namely, NS Power will continue to advance work on the Effective Load Carrying Capacity (ELCC) study, as well as continued participation in the N...

AI summary NS Power highlights ongoing efforts to prepare the NSIESO for success, including the ELCC study and participation in the Net Zero Atlantic Hybrid Peak study. It also references the Evergreen IRP and PLEXOS modeling from previous proceedings, such as the Reliability Intertie application (M12217), to support its planning assumptions and modeling accuracy.

3.0 SYNAPSE SUBMISSION Synapse provided four recommendations as follows: 1. After establishment of the IESO, we recommend a rapid ramp-up of the capability to conduct a new Evergreen IRP… The previous IRP modeling efforts associated with t...

AI summary Synapse recommends updating the Evergreen IRP by late 2026/early 2027 with new assumptions, including fast-acting generation and battery storage, while comparing scenarios with and without Mersey rehabilitation costs. This aims to ensure accurate resource planning and cost analysis for Nova Scotia's energy needs.

DATE FILED: September 4, 2025 Page 9 of 19 2023 Load Forecast Report (M11108), April 28, 2023, Figure 2: Historical and Predicted Annual System Peak, page 8. 2023 10 Year System Outlook Report (M11221), June 30, 2023, Figure 19: NS Power 1...

AI summary The document discusses the need for additional firm capacity, particularly fast-acting generation, to maintain the target PRM in Winter 2029/30 and support the transition off coal as outlined in the 2025 10-Year System Outlook Report. It references the Evergreen IRP and the Province's Clean Power Plan, and notes that NS Power supports the procurement of 300 MW of fast-acting generation.

Grid Strategies, on behalf of the CA, provided comments regarding "Update to Evergreen IRP", "Stage 2 of the NS-NB Reliability Intertie Project Application", "Procurement Schedule for Fast- Acting Generation Project", and "Relative Rate Im...

AI summary Grid Strategies, representing the Consumer Advocate, urged the Board to direct NS Power to advance IRP modeling before transferring planning responsibilities to NSIESO. It also highlighted NS Power's lack of a Stage 2 schedule for the NS-NB Reliability Intertie Project, advocating for its inclusion in the next IRP update. NS Power agreed but clarified it is focused on Phase 1 and not engaged in Phase 2 discussions with NB Power.

CA Submission, Re: M12247 – Nova Scotia Power Inc. – 2025 Evergreen IRP Action Plan and Roadmap Update, August 19, 2025, page 2. CA Submission, Re: M12247 – Nova Scotia Power Inc. – 2025 Evergreen IRP Action Plan and Roadmap Update, August...

AI summary The Consumer Advocate (CA) submission discusses the need for updated Integrated Resource Plan (IRP) modeling by Nova Scotia Power (NSP) and the Nova Scotia Independent Energy System Operator (NSIESO) to ensure efficient resource procurement decisions. NSP indicates that a general rate application (GRA) will be filed in 2025, which will reflect the impact of The Path to 2030 resource plan on rates. NSP also states that it will not update the relative rate impact comparison document from the 2020 IRP at this time, contingent on an updated IRP from the NSIESO.

5.0 SMALL BUSINESS ADVOCATE SUBMISSION The SBA "identified several key issues that are critical for effective long-term resource planning to serve Nova Scotia customer needs in a safe, reliable, and economical manner", including "NS Power...

AI summary The SBA highlights the importance of NS Power-NSIESO collaboration for the updated IRP, aligns near-term capacity needs with prior studies (300-900 MW fast-acting generation by 2030), notes limited ELCC study changes, and stresses the need for offshore wind impact analysis. NS Power confirms offshore wind inclusion in the IRP and ELCC updates.

6.0 SOLAR NOVA SCOTIA SUBMISSION - SNS provided comments regarding the ongoing Distributed Energy Resources Integration - Roadmap (DERIR) work and stakeholder consultation process (M11621). In that proceeding, the - NSEB directed NS Power...

AI summary Solar Nova Scotia (SNS) urges expedited completion of the DERIR process to align with 2026 NSIESO planning, warning delays could exclude DERs from procurement and necessitate costly utility-scale investments. NS Power asserts DERIR outcomes will be timely for the upcoming IRP update, which is expected to begin by late 2025.

7.0 ENERGY STORAGE CANADA SUBMISSION ESC provided three points in its submission related to curtailment, consideration of various battery - technologies, and energy security. NS Power takes no position and offers no submissions on ESC's -...

AI summary Energy Storage Canada (ESC) submitted three points regarding curtailment, battery technologies, and energy security. Nova Scotia Power (NS Power) did not take a position or provide submissions on ESC's comments, which may be considered by the Nova Scotia Independent Energy System Operator (NSIESO) in its Integrated Resource Plan (IRP) update.

DATE FILED: September 4, 2025 Page 17 of 19 1 8.0 NATURAL FORCES SUBMISSION 2 3 Natural Forces submission highlights its Pumped Storage Hydro project and provides three related 4 requests: 5 6 • Natural Forces asks that the Board broadens...

AI summary Natural Forces submitted a request to the Board to broaden Synapse's modelling recommendations in the next Integrated Resource Plan (IRP) to include non-BESS storage, specifically the Touquoy Pumped Storage Hydro project. It also requested guidance on considering a project's contribution to sustainable prosperity and ensuring the IRP enables energy resources to maximize their value-stack and monetize ancillary services. NS Power noted that these requests are directed to the Board and will be addressed by the NSIESO in the context of the next IRP.

9.0 CONCLUSION It appears that stakeholders broadly recognize that responsibility for the IRP is transitioning from NS Power to the newly established NSIESO, as outlined in Bill 404. Several submissions emphasize the need to avoid delays i...

AI summary Stakeholders recognize the transition of IRP responsibility from NS Power to NSIESO under Bill 404. NS Power will continue planning activities like the ELCC study to ensure continuity until NSIESO initiates its first IRP by October 2025.

Duties of IESO - 10 (1) In furtherance of the objects of the IESO, the IESO shall - (a) develop terms of reference for and carry out an integrated resource planning exercise as required; - (b) carry out competitive procurements of energy r...

AI summary The IESO is mandated to conduct integrated resource planning, competitive energy procurements, and transmission studies, aligning with the Province's 2030 Clean Power Plan. It must rely on the most recent Integrated Resource Plan (IRP) submitted by NSPI to the Utility and Review Board before initiating new planning exercises.

Integrated resource planning exercises - 11 (1) The IESO shall commence its first integrated resource planning exercise within one year following the coming into force of this Section. - … (3) The IESO shall file the results of its integra...

AI summary The NSIESO is required to conduct its first integrated resource planning exercise within one year of the section's effective date (October 24, 2024) and file results with the Energy Board. The NSIESO did not intervene in the current proceeding.

Transition to the Nova Scotia Independent Energy System Operator As noted in prior IRP Updates, NS Power must meet important environmental targets by 2030, which include the phase-out of coal-fired generation and achieving 80% of its sales...

AI summary The transition to the NSIESO involves phasing out coal and achieving 80% renewable sales by 2030. Stakeholders emphasize urgency in continuing IRP without delay, with NS Power cooperating on transitioning planning functions. NSIESO's first IRP must begin by October 2025, with full transition expected by Q2 2027. Synapse's recommendations are cited for NSIESO's consideration.

NS Power's IRP-related studies and activities Synapse expressed concerns that NS Power has not conducted new IRP modeling since the 2022/2023 Evergreen IRP study and that it is important not to delay the process of conducting the next IRP...

AI summary Synapse urged NS Power to complete pending studies for the next Integrated Resource Plan (IRP), citing delays in updating core assumptions. Six factors, including load forecasts, battery storage, and New Brunswick import capacity, require urgent attention to inform the 2030 resource plan. The 2022/2023 Evergreen IRP study's limitations were highlighted as a barrier to timely planning.