TABLE OF ABBREVIATIONS Abbreviation Description 10 YSO 10-Year System Outlook AAS Automatic Action Schemes BESS Battery Energy Storage System CER Clean Electricity Regulations CO2 Carbon Dioxide CPP Critical Peak Pricing DC Direct Current...
AI summary The document contains a table of abbreviations used in a Nova Scotia regulatory proceeding, including terms related to energy, environmental regulations, and infrastructure.
). The creation of the Independent Energy System Operator of Nova Scotia (IESO, IESO Nova Scotia) has implications for the continued ownership of these filing requirements, which are described herein. NS Power and IESO Nova Scotia have bee...
AI summary The document discusses the transition of responsibilities for the Load Forecast and 10-Year System Outlook (10YSO) reports between NS Power and the newly created IESO Nova Scotia. NS Power will prepare the Load Forecast report while IESO Nova Scotia will take over the 10YSO report, avoiding duplication of efforts. The 10YSO report is an annual assessment of system capacity and resource adequacy, reflecting progress toward 80% renewable energy and the phase-out of coal by 2030.
System Peak (MW) Net System Requirement (GWh) Year System Peak (MW) Growth (%) Nova Scotia Power Net System Requirement (GWh) Renewable -to Retail Energy (GWh) Municipa lity Energy (GWh) Behind-the Meter Solar (GWh) IESO-NS Net System Requ...
AI summary The table provides a projection of system peak demand and net system requirements for Nova Scotia from 2026 to 2036. It includes data on renewable energy, municipal energy, behind-the-meter solar, and the IESO-NS net system requirement. Footnotes reference a Wholesale Market Backup/Top-up Service Tariff, a letter from IESO NS to the NSEB, and a 2026 Load Forecast Report.
3.1 Existing Generation Resources The Nova Scotia generation fleet comprises a diverse mix of thermal, renewable, and energy storage resources. Thermal units operate on coal, petroleum coke, light and heavy fuel oil, and natural gas; renew...
AI summary Nova Scotia's generation fleet includes thermal, renewable, and energy storage resources, with 100 MW of Battery Energy Storage Systems added in 2025. Resource adequacy depends on the type of resource, with thermal and hydro units providing more reliable capacity than energy-limited resources like wind, solar, and storage.
6 Nova Scotia Effective Load Carrying Capability Study, Energy+Environmental Economics, June 2026. Generation Resource Fuel Type Owner Capacity (MW) ELCC (%) Firm Capacity (MW) Total Steam 1590.0 - 1590.0 Combined Cycle Tufts Cove 4,5,6 Na...
AI summary The document presents a table listing various generation resources in Nova Scotia, including their fuel types, owners, capacities, Effective Load Carrying Capability (ELCC), and firm capacities. It includes data on natural gas, wind, solar, biomass, hydro, and battery energy storage systems, as well as independent power producers and wholesale market participants.
3.2.1 Rate Base Procurement The Rate Base Procurement program is made up of four (4) projects totaling 306 MW and 1,165 GWh of wind generation. [13](#page-12-0) Benjamins Mill Wind (IR 673) was commissioned in December 2025, and is reflect...
AI summary The Rate Base Procurement program includes four wind generation projects totaling 306 MW and 1,165 GWh, with one already commissioned and the others expected to be operational by the end of 2026.
3.2.2 Green Choice Program & Additional Energy Procurements The Green Choice Program (GCP) was established by the Government of Nova Scotia in April 2022 following amendments to the Electricity Act . [14](#page-12-1) In June 2025, two (2)...
AI summary The Green Choice Program (GCP) was established in 2022 and has procured 262 MW of wind energy from two projects expected to be operational by 2028. NS Power has identified the need for an additional 350 MW of wind generation to meet 2030 renewable energy targets, with a second procurement round announced in 2026. A further 1,200 MW of wind capacity is included in the 2030-2036 10-Year System Outlook.
3.2.4 Fast-Acting Generation IESO Nova Scotia has initiated a procurement process for 300 to 600 MW of fast-acting generation capacity for the province. The draft Request for Proposals (RFP) and Tolling Agreement was made available for pro...
AI summary IESO Nova Scotia has initiated a procurement process for 300 to 600 MW of fast-acting generation to support the province's clean energy transition. This capacity is critical for maintaining supply reliability as renewable energy penetration increases and peak demand grows. The 2026 10-Year Outlook Resource Plan includes 450 MW of fast-acting generation, with additional needs identified by 2035/2036.
3.2.5 Battery Energy Storage Systems The Government of Nova Scotia's Clean Power Plan calls for 300 to 400 MW of battery storage capacity to be added by 2030. In 2025, 100 MW of BESS was added to the Nova Scotia system (referenced in [Tabl...
AI summary The Clean Power Plan aims to add 300 to 400 MW of battery storage by 2030. In 2025, 100 MW of BESS was added, with 50 MW planned for 2026. IESO Nova Scotia has included 250 MW of BESS in the 10-Year Outlook Resource Plan and will continue studying optimal storage additions in the 2026 IRP.
3.2.7 Firm Imports — New Brunswick On May 28, 2026, the New Brunswick Energy and Utilities Board approved NB Power's Renewable Integration Grid Stability (RIGS) project. [26](#page-14-4) The project will provide IESO Nova Scotia with acces...
AI summary On May 28, 2026, the New Brunswick Energy and Utilities Board approved NB Power's RIGS project, providing IESO Nova Scotia with 100 MW of firm generation capacity starting as early as 2028. This capacity is included in the Resource Plan for Winter 2028/2029 under a 10-year agreement.
Table 3: Additions and Retirements in the 10-Year System Outlook Resource Plan Additions Retirements Winter Generation Type Name Installed Capacity (MW) Firm Capacity (MW) Name Retired Capacity (MW) Wind Rate Base Procurement 273 54.5 Wind...
AI summary Table 3 outlines the additions and retirements in the 10-Year System Outlook Resource Plan, detailing wind, solar, battery storage, and other generation and demand response resources for various years from 2026/2027 to 2035/2036, along with retirements such as coal-to-gas conversions and coal plants.
Firm Resource Additions For energy limited resource additions (wind, solar, battery, demand response), the firm capacity contributions reflect the ELCC rather than installed capacity as discussed in Section [3.1.](#page-7-2) Wind projects...
AI summary The document discusses firm resource additions, focusing on wind, solar, battery, and demand response projects. It highlights the use of Effective Load Carrying Capacity (ELCC) for firm capacity contributions and mentions specific projects with established procurement timelines, as well as future procurements outlined in the 2023 Evergreen IRP.
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.
Winter 2026/ 2027 2027/ 2028 2028/ 2029 2029/ 2030 2030/ 2031 2031/ 2032 2032/ 2033 2033/ 2034 2034/ 2035 2035/ 2036 1 Load Forecast 2 System Peak (with DSM) 2,497 2,526 2,549 2,563 2,593 2,620 2,652 2,689 2,730 2,765 3 Interruptible Load...
AI summary The table presents a 10-Year System Outlook (10YSO) with load forecasts, system peak, required capacity, existing and new firm resources, retirements, and reserve margin percentages for various years from 2026/2027 to 2035/2036. It outlines the capacity additions and retirements, including wind, storage, and coal-to-gas conversions, along with the resulting reserve margins.
4.1 Renewable Electricity Requirements The More Access to Energy Act 2024[28](#page-19-2) directs IESO Nova Scotia to plan and operate the bulk electricity system in accordance with renewable electricity standards (RES). The current RES ta...
AI summary The More Access to Energy Act 2024 directs IESO Nova Scotia to plan and operate the bulk electricity system in accordance with renewable electricity standards (RES). The RES target is currently 40% renewable generation, increasing to 80% by 2030.
5.1.1 Interconnection Requirements IESO Nova Scotia sets performance and interconnection requirements for BESS, generation, and load connecting to the Nova Scotia transmission system. These performance and interconnection requirements will...
AI summary IESO Nova Scotia establishes interconnection requirements for BESS, generation, and load connecting to the transmission system. These requirements are being refined as technology advances and local experience grows. Inverter-based resources (IBRs) like solar and wind can be integrated, though they may require additional grid support mechanisms. The TSIR, last updated in February 2025, will be reviewed in 2026.
5.4.1 Reliability Intertie On April 10, 2025, Wasoqonatl Transmission Incorporated (WTI) filed the NS-NB Reliability Intertie Project Application to build the reliability intertie, a second 345 kV AC transmission line between the Nova Scot...
AI summary On April 10, 2025, Wasoqonatl Transmission Incorporated (WTI) submitted an application for the NS-NB Reliability Intertie Project, which was approved by the NSEB on November 20, 2025. This project involves constructing a second 345 kV AC transmission line between Nova Scotia and New Brunswick to support renewable energy integration and meet provincial renewable energy mandates.
6 CONCLUSION This report constitutes IESO Nova Scotia's 10-Year System Outlook for the 2026-2036 horizon and satisfies the requirement under Section 3.3.1.3 of the Nova Scotia Wholesale and Renewable to Retail Electricity Market Rules . Th...
AI summary IESO Nova Scotia's 10-Year System Outlook (2026-2036) outlines the province's transition to 80% renewable energy and coal phase-out by 2030. The report highlights the need for successful implementation of projects to maintain system adequacy and meet decarbonization targets, while studying impacts of load and generation, including inverter-based resources, to ensure system reliability.
Appendix A: RES Compliance Forecast Year 2027 2028 2030 Energy Requirements (GWh) Energy Requirement 11,951 12,142 12,284 Losses 837 850 860 Sales 11,114 11,292 11,424 RES (%) Requirement 40% 40% 80% RES Requirement (GWh) 4446 4517 9139 Re...
AI summary This appendix provides a forecast of RES (Renewable Electricity Standards) compliance from 2027 to 2030, outlining energy requirements, renewable energy sources, and compliance status. It shows a significant increase in renewable energy production, particularly from wind and solar sources, with a forecasted surplus in 2030.
Disclaimer: These summaries were generated by AI from the filings they describe. We take care to make them accurate, but errors are possible - and they aren't advice. Only the filings themselves are the record: if you're relying on something here, confirm it against the source documents or the Nova Scotia Energy Board's own record. Full disclaimer →