Topic:"Energy Storage" in M12916

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.

3.2.5 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.

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.

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.

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.

5.2.1 Generator and BESS Interconnection The Combined Transmission & Distribution (T&D) Advanced Stage Interconnection Request Queue[38](#page-23-1) provides the location and size of generating and BESS facilities seeking interconnection w...

AI summary The document outlines the status of generator and BESS interconnection requests in Nova Scotia, noting that 20 interconnection requests are associated with 18 projects expected to connect to the transmission system before 2030. These projects involve Transmission Provider's Interconnection Facilities (TPIF) and Network Upgrades (NU), though work related to these is not included in the report.

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...

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 impact on transmission line interruptions and system operations. The request also explores IESO-NS's views on the purpose and benefits of DLR, including congestion relief, renewable integration, and safety improvements.

Request IR – 1 2 Reference: Section 3.2.5 Battery Energy Storage Systems pdf page 15. - a) Please confirm whether the recent announcements by IESO-NS confirming the expansion and acceleration of the battery storage procurement affects the...

AI summary The document requests confirmation on whether recent battery storage procurement announcements by IESO-NS affect the 10-Year Outlook Resource Plan. The request references a specific section of a document discussing battery energy storage systems.

Response IR - 1 - a,b) The expansion and acceleration of IESO Nova Scotia's second procurement process is aligned with the resource plan identified in the 2026 10 Year System Outlook. - c) The commissioning of 150 MW of BESS capacity in 20...

AI summary IESO Nova Scotia's second procurement process is aligned with the 2026 10 Year System Outlook and the Clean Power Plan. The commissioning of 150 MW of BESS capacity in 2025 and 2026 partially meets the 300-400 MW energy storage target. The procurement process will refine the optimal capacity, timing, and technology for future resources.

- 6 values are based on the 2026 ELCC Report 1 . Additions Winter Generation Type Name Installed Capacity (MW) Firm Capacity (MW) Marginal ELCC Wind Rate Base Procurement 273 54.5 20% 2026/2027 Wind Renewable to Retail 36 7.2 20% 2026/2027...

AI summary The text presents a table of wind generation additions and their associated capacity values based on the 2026 ELCC Report. It includes details such as installed capacity, firm capacity, and marginal ELCC for various projects and years. The document also references a study by the Nova Scotia Independent Energy System Operator (IESO Nova Scotia) in response to information requests from the Nova Scotia Energy Board (NSEB).

Request IR – 7 - Please describe IESO Nova Scotia's contingency plan to meet projected system load, as well as - maintain system reliability and NPCC compliance, if IESO Nova Scotia has not put 250 MW of - battery storage in-service by 202...

AI summary IESO Nova Scotia explains that even without the 250 MW battery storage in-service by 2029/2030, the system can still maintain a 20% planning reserve margin due to other resource additions and a forecasted reserve margin surplus of 108 MW.

Response IR - 8 - a) The firm capacity values in Table 3 and Table 4 are based on Effective Load Carrying Capacity (ELCC) for variable renewable resources, like wind and solar, and energy limited resources, like batteries and demand respon...

AI summary The response discusses the calculation of firm capacity values for different types of energy resources, distinguishing between variable renewable resources (like wind and solar) and dispatchable thermal resources. It explains how Effective Load Carrying Capacity (ELCC) is used for variable resources and installed capacity for thermal resources, and how marginal ELCC decreases as resource penetration increases.

- a) Please provide a comparison table showing the ELCC values from the 2025 Report and the 2026 Report. Provide the average and incremental ELCC values for all penetration levels available. - b) The 2026 Report cites to the June 2026 E3 E...

AI summary The request seeks a comparison of ELCC values from the 2025 and 2026 Reports, clarification on which ELCC study was used in the 2026 Report, and an explanation of how interactive effects of wind, solar, and battery storage were incorporated into the 2026 Resource Plan.

NON-CONFIDENTIAL d) In Table 3 the annual incremental firm capacity attributed to the diversity credit is a function of the installed capacity of storage (existing plus incremental), and the annual incremental capacity additions of wind an...

AI summary The text discusses how the diversity credit in Table 3 is influenced by changes in the installed capacity of storage and the annual incremental capacity additions of wind and solar resources. It also references a follow-up study on wind-storage ELCC results for further analysis.

NON-CONFIDENTIAL Renewable to Retail Addition 36 57 2026/2027 2027/2028 90 2025/2026 2026 10 YSO reflects the updated timing of the project with implementation split between two Winter periods. Total capacity (90 MW) is unchanged. Port Haw...

AI summary The document outlines updates to various energy projects in Nova Scotia, including changes in implementation timelines and capacity adjustments. Key projects include the Renewable to Retail, Port Hawkesbury Paper Wind, and NS Community Solar, with updates reflecting revised schedules and capacities as outlined in the 2026 10 YSO.

Request IR-7: - Please describe IESO Nova Scotia's contingency plan to meet projected system load, as well as - maintain system reliability and NPCC compliance, if IESO Nova Scotia has not put 250 MW of - battery storage in-service by 2029...

AI summary The request asks IESO Nova Scotia to describe its contingency plan for meeting projected system load and maintaining system reliability and NPCC compliance if 250 MW of battery storage is not in-service by 2029/2030.

Request IR-10 Refer to the 2026 Report Section 3 – Existing Generation Resources, page 15, Table 3: Additions and Retirements in the 10-Year System Outlook Resource Plan, and the Demand Response additions. The Demand Response ELCC values v...

AI summary The document requests clarification on the discrepancy between Demand Response ELCC values in two different tables from the 2026 Report. It highlights significant variations in ELCC values across different time horizons and asks for an explanation of the drivers behind these changes and whether the values represent marginal or average ELCC.

Request IR-15 Refer to the 2026 Report Section 3 – Existing Generation Resources, page 18, Table 4: IESO-NS 10-Year Load and Resource Outlook, and the BESS additions. - a. Please confirm whether IESO NS has assumed any degradation of BESS...

AI summary The document requests clarification on the IESO-NS's assumptions regarding BESS capacity degradation and the qualification of new fast-acting generation under the Clean Electricity Regulations. It references specific sections and exhibits from the 2026 Report and NS Power 2025 Report.

Request IR-18 Refer to the 2026 Report Section 5.2.1 Generator and BESS Interconnection, page 23, which states "there are twenty (20) Interconnection Requests associated with eighteen (18) projects currently anticipated to connect to the N...

AI summary Request IR-18 asks for the full list of 20 interconnection requests and 18 associated projects anticipated to connect to the Nova Scotia transmission system before 2030, including details such as project names, generation types, installed capacities, and expected in-service dates.

1 2026 M12916 2 NOVA SCOTIA ENERGY BOARD 3 IN THE MATTER OF: The Public Utilities Act 4 IN THE MATTER OF: Nova Scotia Independent Energy System Operator's 2026 10- 5 Year System Outlook Report 6 7 INFORMATION REQUESTS To: Nova Scotia Indep...

AI summary The Industrial Group has submitted an information request to the Nova Scotia Independent Energy System Operator (IESO-NS) regarding the impact of recent battery storage procurement announcements on the 10-Year Outlook Resource Plan, including the scope, timing, and expected in-service dates of the expanded procurement.

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.

specially for beyond 2032, where they are based on projections from six years ago). The Ecology Action Centre would ask the regulator to require the system operator to revise their resource plans to: - 1. Demonstrate full compliance, with...

AI summary The Ecology Action Centre requests the regulator to require the system operator to revise resource plans, including compliance with RES and PRM targets, accelerating regional planning for import capacity, and piloting long-duration energy storage. This is part of a submission by Chris Benjamin.

4. Battery Degradation Assumptions IESO Nova Scotia stated that "battery degradation affects storage capacity (MWh) but not maximum output (MW) of the battery, which is a product of the inverter size" and therefore it has not assumed any d...

AI summary IESO Nova Scotia assumes battery degradation does not affect inverter capacity, but the SBA argues that degradation reduces storage capacity and thus the capacity value of battery energy storage systems (BESS), suggesting that battery augmentation may be needed for resource adequacy.

C. Sufficiency of Transmission Planning In addition to the coordination issues with NS Power discussed above, the Report suggests that IESO NS has not taken a sufficiently broad view of its role in driving cost-effective transmission 11 Ex...

AI summary The report highlights that IESO Nova Scotia has not sufficiently evaluated the results of NS Power's DLR project or considered its broader system benefits in transmission planning. The Board is urged to direct IESO Nova Scotia to adopt a more proactive approach in its transmission planning responsibilities.