Topic:"Generator Interconnection" in M12619

CI# Project Title 2026 Budget ($) Project Total ($) and intermediate pressure steam from the boiler to produce power through the generator. C0082195 LIN2 2025/26 Capacity Requirement 299,478 3,162,203 This project is for the component refu...

AI summary The document outlines several infrastructure and maintenance projects across Nova Scotia's energy sector, including asset refurbishment, replacement of equipment, and system upgrades to ensure operational reliability and compliance with environmental regulations.

REDACTED 2026 ACE Plan C0080133 Page 2 of 5 excess of 50,000 hours since its last major inspection and will be due for overhaul in 2027 based on NS Power’s asset management strategy. Completing this project in a planned manner, assessing c...

AI summary The document discusses the planned refurbishment of the Intermediate Pressure (IP) turbine at Tufts Cove 3 (TUC3) during the 2027 outage to ensure continued safe and reliable operation, mitigate risks of unplanned outages, and align with NS Power’s asset management strategy. The project aims to reduce operational risks and maintain system reliability.

ting investment. These units offer valuable operational flexibility and enhance system security through black start capability, rapid response, and improved system stability. Why do this project now? Completing the refurbishment of this en...

AI summary This text discusses the need to refurbish an engine in 2026 to prevent unplanned failures. Inspection in 2025 revealed damage to blades in the low-pressure and high-pressure compressor stages, indicating hidden wear that can only be confirmed through depot-level disassembly. The project is necessary due to the risk of failure and the need for compliance with OEM procedures.

uch larger portion of the transmission system and in some cases affects a higher number of customers. This project will complete replacement of four Pennsylvania circuit breakers on NS Power’s system. Summary of Related CIs +/- 2 years: Pu...

AI summary The document discusses the replacement of Pennsylvania circuit breakers on NS Power’s transmission system due to poor performance and reliability concerns. The project is justified based on safety, system reliability, and the unavailability of replacement parts from the original equipment manufacturer. Related capital items and depreciation class information are also provided.

REDACTED (CONFIDENTIAL INFORMATION REMOVED) 2026 ACE Plan C0080612 Page 5 of 5 Legend: Inclusions: Date: December 12, 2025 Page 430 of 782 REDACTED REDACTED (CONFIDENTIAL INFORMATION REMOVED) 2026 ACE Plan C0080111 Page 1 of 5 CI Number: C...

AI summary This document outlines the 2026 RTU Deployment project, which involves installing 21 Remote Terminal Units (RTUs) in Nova Scotia substations to improve grid operation and emergency response times. The project is part of General Plant function and has a forecasted cost of $8,322,655.

genera on, o en at a higher cost than the exis ng genera on. These costs are es mated using the probabilis c produc on model and incorporated into the Economic Analysis Model. 17.8 System Design Nova Sco a Power’s transmission system is di...

AI summary Nova Scotia Power Inc. estimates generation costs using a probabilistic production model integrated into the Economic Analysis Model. The transmission system is classified into primary, secondary, and electrically remote categories with distinct design criteria. NS Power adheres to NPCC Directory #1 for bulk power system design, ensuring alignment with interconnected grid standards.

ill be 14 cycles. c. Where breaker failure protec on is required to trip remote breakers to isolate the fault described in item a), the fault clearing me will be 16 cycles. d. For a three phase or phase to ground fault on any element direc...

AI summary The document outlines technical requirements for breaker failure protection, fault clearing times, and system stability criteria for the Interconnected Transmission System. It references the 2026 ACE Plan and Nova Scotia Power Inc.'s capital expenditure justification criteria, emphasizing system reliability and dynamic response standards.

1 • Submitting an annual report, on or before January 31 of each year, to the Minister and the 2 Board as required under the Green Choice Program Regulations. 12 3 4 In January 2025, six renewable energy projects were selected by the Procu...

AI summary The Green Choice Program (GCP) selected six renewable energy projects in 2025, with two entering the System Impact Study phase. Projects like IR 732 – Eigg and IR 826 – Sugar Maple Wind have pending interconnection agreements and target COD in 2028. Nova Scotia Power (NS Power) will support development, while the Province announced a new procurement process in September 2025 to meet GCP capacity targets.

2026 ACE Plan Appendix F Page 20 of 55 The Path to 2030 – 2025 Update Non-Confidential 1 NS Power has been supporting the PHP Wind project as it moves through the GIP. There are 2 currently two IRs associated with the project. Goose Harbou...

AI summary NS Power is supporting the PHP Wind project through the Generator Interconnection Process (GIP), with two Information Requests (IRs) in progress. The Minas Highlands Wind Limited project (IR 762) is also advancing, with System Impact and Facilities Studies ongoing. Both projects aim for commercial operation by late 2026.

1 2 (IR 675) is forecast to reach commercial operation in Q1 2027, with the supporting operating 2 study to be completed beforehand to assess system impact. This will bring the total installed 3 capacity of the Mersey River Wind projects t...

AI summary The document outlines the progress of Mersey River Wind projects (Phases I and II) with capacities of 90 MW and 112.5 MW, respectively, and their expected commercial operation dates. It also notes the status of other interconnection requests (IR 739, IR 785) and the Generator Interconnection Process (GIP) for Renewable to Retail (RtR) projects.

- West Withdrawn Wind Farm 14 1 This is a change from the 2024 update as the EMT analysis for IR 597 was incorporated into the IR 675 15 plant model, which was modified to include both IR 597 and IR 675 as a single plant. 16 2 March 31, 20...

AI summary The 2026 ACE Plan incorporates EMT analysis for IR 597 into the IR 675 plant model, modifying it to combine both as a single plant. The first 54 MW of Mersey Wind 2 is scheduled for COD on March 31, 2027, reflecting updates to the 2024 IRP analysis.

Currently operating in Cold Reserve Lingan 3 2029 Converted to HFO operation (reliability resource) Lingan 4 2029 Converted to HFO operation (reliability resource) Trenton 5 2027 Trenton 6 2029 Point Aconi 2029 Point Tupper 2028 Converted...

AI summary The document outlines the operational status of several power plants, including conversions to HFO (Heavy Fuel Oil) and scheduled decommissioning dates. NS Power notes that retaining thermal units in cold reserve supports system reliability during commissioning and testing, as part of ongoing resource planning by IESO-NS.

al 1 replacement of RTUs and enhanced communications with distributed protection equipment, 2 strengthening real-time visibility, operational responsiveness, and overall system reliability. 3 4 7.3.1.1 Remote Terminal Units (RTUs) 5 6 In 2...

AI summary NS Power plans to replace and upgrade end-of-life RTUs in 2025 and 2026 to improve grid reliability, with a focus on enhancing real-time visibility and operational resilience. Additionally, efforts will continue to expand connectivity to downline devices by integrating advanced telemetry and remote control capabilities.

2026 ACE Plan NSEB IR-7 Attachment 1 Page 1 of 1 REDACTED (CONFIDENTIAL INFORMATION REMOVED) CI# Project # Project Long Title Invesment Trigger Retire by 2030 TRECP C0061331 Steam TRE0 - 6A Service Air Compressor Replacement Trenton Genera...

AI summary The document outlines a list of projects under the 2026 ACE Plan, focusing on the refurbishment and replacement of equipment at the Trenton Generating Station. These projects include air compressor replacements, fan refurbishments, boiler upgrades, and various other maintenance activities, all scheduled for retirement by 2030.

NON-CONFIDENTIAL 1 Request IR-81: 20 nondestructive examinations, are designed to detect degradation and provide insight into 21 last-stage blade failure modes. The collective condition assessments determined that the 22 cracking was consi...

AI summary An inspection in March 2025 found five cracked blades on LP2 and LP3, leading to the conclusion that full last-stage blade replacement is required for TUC1 to ensure reliability. A total of 318 blades will be replaced, and 24 spare blades will be purchased.

2026 Annual Capital Expenditure (ACE) Plan (NSEB M12619) NSPI Responses to NSEB Information Requests 1 Request IR-100: 3 and help System Operators manage variability from wind generation. NS Power also 4 maintains the ability to source a l...

AI summary NS Power is addressing the 2026 Annual Capital Expenditure (ACE) Plan by responding to information requests regarding the CT-BGT2 engine refurbishment. They argue that refurbishing the existing FT4 engine is more cost-effective than purchasing a used engine, citing stable refurbishment costs and the high cost of major overhauls for LM6000 units.

Integrated Resource Plan," prepared for the Nova Scotia Consumer Advocate, NSUARB Matter No. M08059, with Paul Chernick, January 2021. - "Implementing All-Source Procurement in the Carolinas," prepared for Natural Resources Defense Council...

AI summary The document lists various reports and studies prepared for regulatory proceedings and organizations, focusing on energy planning, procurement, grid strategies, and interconnection processes. These reports were prepared for entities such as the Nova Scotia Consumer Advocate, the Natural Resources Defense Council, and the Mississippi Power Company, among others.

Natural Resources and Renewables Office of the Minister PO Box 698, Halifax, Nova Scotia, Canada B3J 2T9 • Telephone 902-424-4037 • Fax 902-424-0594 • novascotia,ca October 9, 2024 Judith Ferguson Nova Scotia Power 1223 Lower Water Street...

AI summary The Minister of Natural Resources and Renewables directs Nova Scotia Power Inc. (NSP) to ensure stability, reliability, and power quality of the transmission system for wind generation facilities prescribed under the regulations. NSP may set minimum technical requirements for wind turbines, and owners of prescribed facilities must make a one-time payment to NSP, with annual adjustments based on the Consumer Price Index, unless exceptions apply.

2.2.3 C0080135 – Burnside #2 Combustion Turbine (CT-BGT2) Engine Replacement [23] CT-BGT2 is a 33 MW combustion turbine located in the Burnside Industrial Park in Dartmouth. It provides black start capability, 10-minute reserve, Volt-Amper...

AI summary The document discusses the need to replace the deteriorated engine of the Burnside #2 Combustion Turbine (CT-BGT2) in Nova Scotia. NS Power has proposed a capital project involving a full tear down and refurbishment of the turbine engine. The Board raised concerns about whether NS Power had thoroughly reviewed alternative options, such as purchasing a previously owned and refurbished engine.

nt under this program was shown as 2028. NS Power did not have any additional information on this procurement, other than the September 2025 public announcement that there would be a new solicitation. [196] The New Wind and Solar generatio...

AI summary NS Power is progressing with BESS projects and fuel conversions under provincial programs. The Board approved these projects in 2024, and the Bridgewater and Spider Lake BESS sites are now operational. White Rock BESS is also in service, providing 50 MW of storage capacity to support peak demand during low wind generation periods.

Request IR-66: - What is the required lead time for expected parts delivery? - a) Will parts be purchased in advance of the planned outage to limit the impact that delivery delay may have on overall outage time? - b) After completion of th...

AI summary The document requests information about NS Power's procedures for managing parts delivery during planned outages, including whether parts will be pre-purchased and whether delays in delivery can be managed without extending outage times.

Request IR-68: - a) NS Power indicates that this investment only has a 50-year life. Will this estimated life need major repair or replacement to reach 50 years, or can it be expected that the structure will go without a major repair or re...

AI summary The document contains three questions submitted to NS Power regarding the lifespan and maintenance of infrastructure and the retirement timeline of the Tufts Cove Generating Station.

General Plant Capital Investments

AI summary The section discusses General Plant Capital Investments, focusing on infrastructure and capital expenditures related to energy generation and distribution. It highlights the importance of strategic planning and investment in power generation facilities.

Request IR-167: - On page 659, NS Power states, "In addition, the CER establishes the potential for "planned unit" - designation, which allows units in development that meet specific milestone criteria by the end of - 2025, have started co...

AI summary NS Power outlines the 'planned unit' designation under the CER, which allows certain units to be exempt until 2049 if they meet specific criteria. The question asks if Fast-Acting Generation Resources or Fuel Conversion of Existing Units in Figure 1 qualify for this designation.

Request IR-174: - The transmission planning team, along with the system security team, have been collaborating to - ensure the control system design parameters of the new inverter-based resources (IBRs) aid in - maintaining the stability o...

AI summary The document outlines a request concerning the control system design parameters of new inverter-based resources (IBRs) and their impact on grid stability. It asks whether the configuration of these parameters will increase costs and who would bear those costs.

Request IR-15: - Please refer to the Application Page 35 of 782, Figure 10: Capital Items Forecast for Subsequent Submittal, Transmission, CI# C0081985 Michelin DVR Phase 2. - a) How does this project connect or interact with the previousl...

AI summary The text requests clarification on how the Michelin DVR Phase 2 project connects or interacts with the previously approved Michelin Waterville Dynamic Voltage Restorer project in M11656.

2026 ACE Plan Hearing Transcript, April 22, 2026, page 423 (PDF page 71 of 254). 1 would also continue to operate the diesel CTs, including BGT2, as part of the resource portfolio 2 mix to meet both the capacity needs and support the integ...

AI summary NS Power argues that leasing a combustion turbine engine is not a viable long-term solution for maintaining system stability and meeting renewable energy targets. They emphasize the importance of refurbishing a known engine with a documented history to ensure reliability and support the Clean Power Plan and the 80% renewable energy target by 2030.

2.2.3 C0080135 – Burnside #2 Combustion Turbine (CT-BGT2) Engine Replacement [23] CT-BGT2 is a 33 MW combustion turbine located in the Burnside Industrial Park in Dartmouth. It provides black start capability, 10-minute reserve, Volt-Amper...

AI summary The document discusses the replacement of the Burnside #2 Combustion Turbine (CT-BGT2) engine due to damage observed during an inspection. NS Power plans to refurbish or replace the turbine engine following OEM guidelines, but the Board expressed concerns about whether alternative options, such as purchasing a used engine, were thoroughly evaluated.

2.2.4 C0080111 – 2026 RTU Deployment [28] This project will install 21 new Remote Terminal Units (RTU) in substations throughout Nova Scotia over the next three to four years. The RTU and telecom will be installed at substations that curre...

AI summary This section discusses the 2026 RTU Deployment project by NS Power, which involves installing 21 new Remote Terminal Units (RTU) in Nova Scotia substations to improve grid visibility and emergency response times. The project supports the Advanced Grid Modernization program and aims to enhance grid resilience and reliability by enabling faster fault detection and outage resolution.

nt under this program was shown as 2028. NS Power did not have any additional information on this procurement, other than the September 2025 public announcement that there would be a new solicitation. [196] The New Wind and Solar generatio...

AI summary NS Power is advancing renewable energy and battery storage projects under provincial programs. The Board has approved three BESS projects, with two already operational and the third expected to be in service. These projects support renewable integration and provide flexibility during peak demand, as demonstrated during a cold-weather event in January 2026.