N-3NSPI (Synapse) RIR 1 to 65
32 passages
- that shows the $1.8 billion broken out by Distribution, Transmission and Vegetation Management. Year Transmission Distribution Vegetation Management Total 2014 50.4 51.7 1.8 103.9 2015 53.5 59.8 3.7 117.0 2016 52.3 68.0 6.1 126.4 2017 82...
AI summary The document provides a breakdown of NS Power's expenditures of $1.8 billion across Distribution, Transmission, and Vegetation Management from 2014 to 2023, with detailed statistics on customer interruptions, including SAIDI and SAIFI metrics from 2015 to 2024.
Foreign interference Interruptions due to external contacts beyond the control of the utility (e.g. Birds, animals, vehicles, dig -ins, or other foreign objects)
AI summary The text discusses interruptions to utility services caused by external factors such as birds, animals, vehicles, dig-ins, and other foreign objects, which are beyond the control of the utility.
1 Request IR-20: 15 (a) NS Power is mandated to provide power service to customers via their electric meters and 16 the overall transmission and distribution grid. NS Power does not have the mandate or 17 ability to direct the installation...
AI summary NS Power explains that it is not responsible for directing or tracking customer-installed backup power equipment. It also notes that current reliability metrics do not account for behind-the-meter generation or backup power, which affects how performance standards are calculated.
1 3.0 2025 Overview – Year One of Five Year Reliability Plan 2 3 In 2025, NS Power's Reliability team has been focused on executing the projects identified in year 4 one of the Plan, with $206.6 million committed to strengthen the grid and...
AI summary In 2025, NS Power has committed $206.6 million to strengthen the grid and enhance its resilience, focusing on reliability upgrades, including coastal framing standards, insulator upgrades, conductor replacement, transformer replacements, and tree clearing. These efforts are part of the five-year reliability plan.
1 Figure 10: Completed Distribution Corridor Widening with Managed Rights-of-Way
AI summary The document presents Figure 10, which illustrates the completed distribution corridor widening with managed rights-of-way, highlighting infrastructure improvements in the electricity grid.
1 Figure 15: Completed Trimming and Removal of Trees Around Existing Power Lines 2 3 4 As described in the previous sections, NS Power expects to see improvement in tree-related 5 outages on feeder segments that have received targeted vege...
AI summary NS Power anticipates a reduction in tree-related outages following targeted vegetation management investments. Figures 16 and 17 show examples of improved distribution Right-of-Ways (ROWs) in Shelburne, Trenton, and Little Harbour, which increase visibility for inspections and outage restoration, supporting reliability and safety.
1 5.0 STORM HARDENING – TARGETED EQUIPMENT REPLACEMENTS AND 2 UPGRADES 3 4 2024-2029 Forecast Investment: $916 million 5 Forecasted Performance Standards SAIDI Reduction: 0.13 to 0.24 hours 6 7 2025 Anticipated Year End Investment: $152.4...
AI summary The document outlines a 2024-2029 forecast investment of $916 million for storm hardening through targeted equipment replacements and upgrades on the distribution, transmission, and substation systems. The initiative aims to improve grid reliability and resilience by reducing outage frequency, increasing capacity, and integrating advanced monitoring technologies.
- 17 These efforts are part of NS Power's ongoing commitment to improving system reliability, 18 enhancing customer experience, and supporting a more resilient energy future for the province. 1 5.1.1 Upgrade and Replace Aging Equipment 2 3...
AI summary NS Power is upgrading aging equipment and installing protective devices to improve system reliability, reduce outages, and enhance safety. Efforts include replacing aging assets and installing reclosers, with progress tracked across various regions.
5 Trip Savers are protective devices installed on smaller segments of the distribution system where 6 traditional fuses have historically been used. Like reclosers, Trip Savers rapidly detect and isolate 7 faults, enabling quicker restorat...
AI summary NS Power has installed 15 of 16 planned Trip Savers by December 2025, with the remaining unit expected to be completed before year-end. These devices help detect and isolate faults, improving service restoration and reducing outage duration.
18 Updated Overhead Standards 20 NS Power has updated its overhead distribution design standards to align with the current CSA 21 C22.3 overhead line standards. In the Board's decision on the 2025 Annual Capital Expenditure 22 (ACE) Plan (...
AI summary NS Power has updated its overhead distribution design standards to align with CSA C22.3 standards. The Board directed monitoring of upgraded poles and relocation of distribution lines to roadside locations to improve reliability and reduce outages. Progress on these initiatives has exceeded initial targets.
5 The Distribution Underground Program focuses on the targeted replacement and upgrade of aging 6 underground infrastructure, including padmount transformers, switches, vaults, and manholes. 7 These upgrades are essential to maintaining sy...
AI summary The Distribution Underground Program involves replacing and upgrading aging underground infrastructure, such as padmount transformers, switches, vaults, and manholes, to enhance system reliability and safety. NS Power exceeded its 2025 target for padmount transformer replacements and has made progress on vault and manhole upgrades.
1 6.0 ADVANCED GRID MODERNIZATION PROGRAMS 2 3 2025-2029 Forecast Investment: $78 million 4 Forecasted Performance Standards SAIDI Reduction: 0.06 to 0.11 hours 5 6 2025 Anticipated Year End Investment: $9.2 million 7 8 NS Power's Advanced...
AI summary NS Power's Advanced Grid Modernization program aims to improve grid reliability and efficiency through technologies like RTUs, FLISR, and DER integration. The 2025-2029 forecast investment is $78 million, with a target SAIDI reduction of 0.06 to 0.11 hours. Progress includes 6 completed RTUs and 64 remaining devices to be connected by 2025/2026.
1 7.2.1.2 Distribution System Build to Roadside - 3 To improve accessibility and reduce outage duration, NS Power is planning to relocate 7.1 - 4 kilometers of distribution lines to roadside in 2026. This investment aligns with NS Power's...
AI summary NS Power plans to relocate 7.1 kilometers of distribution lines to roadside in 2026 to improve accessibility and reduce outage duration, aligning with its broader reliability strategy and targeting areas with access limitations that have historically caused extended outages.
Table 3 – Absolute Limits of Note 2.1 Approach AC Systems - Qualified Personnel NSPI Nominal Circuit Voltage (Phase to Phase) C.S.A. Voltage Range (Phase to Ground) Limitof Approach Metres/Feet Note2.5 30 – 300V <220V Maintain air gap Main...
AI summary The document provides tables outlining absolute limits for approach distances to AC and DC systems based on voltage ranges, emphasizing the need to maintain air gaps and specific distances for safety. Notes reference additional details for different voltage levels.
82V-402 1 Request IR-44: 30 loading. Specifically, for TripSaver installations, there is also consideration for the ability to 1 improve fault isolation, reduce outage duration, and enhance restoration times through the 2 application of au...
AI summary The document discusses NS Power's investment in TripSaver installations, highlighting their potential benefits in improving fault isolation, reducing outage duration, and enhancing restoration times. It also notes the variability in reliability benefits depending on feeder configuration and topography, making it difficult to project improvements at the individual installation level.
6 (a) Please refer to the table below. CI# Project Title 5 YR 2025 Forecast Total Reliability Improvements Reason for work not completed Routine - Structure PROVINCIAL - PLANNED Replacements and Work 23118 TRANS LINE REPLACEMENTS $6,055,25...
AI summary The table outlines various infrastructure projects related to reliability improvements and upgrades, including line replacements, structure replacements, and compliance with NERC standards. Projects are listed with their CI numbers, titles, five-year forecasts, and statuses indicating whether the work was completed.
(ii) The purchase of the two spare units would provide coverage for transformer failures across the province. Having these spares in place ensures that if there is a transformer failure then NS Power has an available unit to put in its pla...
AI summary The document discusses the replacement of aging transformers at several locations in Nova Scotia, emphasizing the importance of having spare units to mitigate potential outages. It highlights the risks associated with transformer failures, particularly at generation sites and the only transformer serving Mahone Bay. The replacements were delayed due to resource availability.
NON-CONFIDENTIAL 1 2 (c) NS Power does not assess mitigation effectiveness at the level of each individual 3 Connected Asset intervention. For Fault Isolation and Service Restoration projects, please 4 see IR-58 for more details. As noted,...
AI summary NS Power does not assess the effectiveness of mitigation at the individual asset level for Fault Isolation and Service Restoration projects. Grid visibility and monitoring capabilities are limited, with most distribution feeders beyond the substation lacking real-time monitoring. Data collection is limited, and most switch operations require manual intervention.
1 8 14 20 (i) The RTUs that were commissioned in 2025 were implemented throughout the year. Reliability improvement estimates are averaged across the program and are not available per device upgrade. The specific quantitative impacts of ea...
AI summary In 2025, NS Power deployed RTUs across multiple sites, with six of eleven fully commissioned by year-end. The remaining five faced delays due to storm response and winter loading constraints. Total investment was approximately $893,000, with costs recorded on a project basis rather than per substation or feeder.
RTU Connectivity Substation Description Substation Criticality Substation Customers Feeder Criticality 23 included in Attachment 1. 24 25 (b) 26 (i) Reliability improvement estimates are averaged across the program and are not 27 available...
AI summary The document discusses RTU connectivity within Nova Scotia Power's infrastructure, including challenges related to reliability improvements, investment in Downline Recloser Connectivity in 2025, and disruptions caused by a cyber incident. It also outlines limitations in allocating costs to specific sites due to concurrent labour activities.
CI C0071528 – FLISR Implementation (NSEB M12417) NSPI Responses to NSEB Information Requests 1 (c) As noted in part (b), the project is not designed or intended to prevent outage events from 2 occurring, but improvements in reliability per...
AI summary The document discusses NS Power's FLISR implementation, noting that the project does not aim to prevent outages but improve reliability performance through faster restoration. Performance will be evaluated using asset management frameworks and risk-based assessments, with data from ADMS and AMI used for validation. A formal cost-benefit analysis was not conducted due to FLISR's unique functionality.
Fault Location, Isolation, and Service Restoration NS POWER ASSESSMENT 2025
AI summary The document outlines an assessment by Nova Scotia Power (NS Power) related to Fault Location, Isolation, and Service Restoration (FLISR) for the year 2025. It focuses on improving service reliability and outage management.
2.1 FLISR Technology FLISR is a system of distribution protection devices sited to allow automatic and remote reconfiguration of the distribution grid. Its purpose is to improve feeder reliability by minimizing the number of customers affe...
AI summary FLISR technology uses distribution protection devices to automatically reconfigure the grid during outages, improving feeder reliability. It includes automated segmentation, decentralized, and centralized approaches, each suited for different feeder configurations and grid complexity.
The primary goal of FLISR is to reduce the impact and duration of outages. The following table demonstrates how FLISR augments traditional technologies to provide the most benefits to customers. Method Customers Impacted Speed to Restorati...
AI summary FLISR aims to minimize outage impact and duration by improving restoration speed compared to manual and conventional automated methods. The text explains how FLISR provides faster service restoration by precisely locating faults and reconfiguring feeders, unlike traditional methods that rely on time-current coordination with inherent delays.
2.3.2 System Visibility and Flexibility - Visibility and remote-control enablement of devices provides higher situational awareness for Distribution System Operators. - Robust integrations with the ADMS enhances distribution system flexibi...
AI summary Enhanced system visibility and remote control capabilities improve situational awareness for Distribution System Operators. Integration with ADMS increases distribution system flexibility and coordination, while real-time data improves troubleshooting tools.
3.1 US FLISR Deployments
AI summary This section discusses US FLISR (Fault Location, Isolation, and Service Restoration) deployments, focusing on technologies and strategies used in the United States for grid reliability and outage management.
3.2 Canada FLISR Deployments
AI summary This section discusses FLISR (Fault Location, Isolation, and Service Restoration) deployments in Canada, focusing on their implementation and impact on grid reliability and outage management.
1 Request IR-5: 2 3 The application notes implementation of three versions of FLISR technologies and 4 equipment in four geographic areas within Nova Scotia. 5 6 (a) Keeping the reasons for outages noted above in mind, please list the rati...
AI summary The response to Request IR-5 explains the rationale for selecting different FLISR technologies for different feeders in Nova Scotia. Radial feeders (85S-401 and 11S-401) use devices for enhanced fault location and segmentation, while feeders in areas with alternative power flow sources (129H-412 and 137H-414) use a decentralized FLISR scheme for rapid response and partial restoration during outages.
1 Centralized 2 Feeders 2H-411, 2H-421, 104H-433, 104H-423, and 103H-433 form an important part of 3 the distribution network serving the Halifax Peninsula, increasing the potential impact of 4 unplanned outages due to the high density of...
AI summary The document highlights the importance of feeders in the Halifax Peninsula distribution network and discusses the potential benefits of implementing centralized FLISR and ADMS to optimize restoration actions and manage system constraints.
NON-CONFIDENTIAL Feeder Circuit or FLISR Type Average Outage Duration (> 100 cust) [hrs] FLISR Restoration Time (min) Average FLISR (10-25%) Reduced Outage Duration [hrs] 85S-401 4.6 1 3.8 11S-411 3.6 1 3.0 Centralized 2.7 10 2.3 Decentral...
AI summary This table presents data on FLISR performance and associated cost savings for different feeder circuits and FLISR types, including average outage durations, restoration times, and potential avoided operational costs. The data suggests that implementing FLISR systems can significantly reduce outage durations and associated labor and overhead costs.
2024 Annual Performance Standards Report (NSEB M12185) NSPI Responses to NSEB Information Requests 1 Request IR-12: 2 3 Another aspect of the reliability plan is a forecast expenditure of $13 million related to fault 4 location, isolation,...
AI summary The response to an information request discusses a self-healing grid project in Chattanooga, Tennessee, and the installation of FLISR technology on 113H Dartmouth East feeders in Nova Scotia. It highlights the benefits of such projects in reducing customer interruptions and improving grid reliability.
1 alternate feed to customers. This restores the maximum number of impacted customers, 2 typically within a minute. 3 4 5 The following table identifies events that triggered the IntelliTeam FLISR scheme since its 6 final commissioning on...
AI summary The IntelliTeam FLISR scheme has restored service to approximately 61% of impacted customers since its commissioning in November 2023, with six interruptions recorded by November 2024. It has avoided 14,484 customer interruptions and 35,643 customer hours. The system communicates with the ADMS at NS Power's Distribution Control Centre, providing situational awareness to Distribution Operators.