Topic:"Energy Storage" in M11307

KEY FINDINGS Based on the common themes observed, the following are the key guiding principles to inform the Action Plan and Roadmap Items: - Variable renewable capacity additions are required to meet the 2030 targets. Up to 1500MW of addi...

AI summary Key findings emphasize the need for 1500MW additional wind, 200MW solar, and 100-900MW firm capacity by 2030. Battery storage (≥100MW) and the Reliability Tie are critical across scenarios. The Atlantic Loop reduces costs/emissions with government support. Synchronous condensers and SMRs (late 2030s) address system reliability and decarbonization. NS Power updated its 2020 IRP based on 2023 modeling.

Battery Storage - Battery storage is added to all scenarios with additions beginning as soon as 2025 in many scenarios. - At least 100MW of 4-hour battery storage is added by 2030 in the majority of scenarios. - Increased additions of batt...

AI summary Battery storage is projected to be deployed starting in 2025, reaching at least 100MW by 2030. No Atlantic Loop scenarios show higher adoption. Storage provides energy arbitrage, curtailment reduction, and wind integration, but voltage/frequency support is not modeled in the IRP framework.

GENERATION MIX The evergreen IRP modeling results demonstrate that annual generation profiles are increasingly decarbonized through the planning horizon in line with environmental policy changes in 2030 and 2035 (please refer toFigure 4)....

AI summary The document discusses the decarbonization of Nova Scotia's generation mix through 2030 and 2035, emphasizing wind energy's role, curtailment rates (10–45%), and emission reductions. Gas resources are used in peaking capacity, with lower emissions in all scenarios compared to 2005 levels.

Item 3f: Battery Storage Capacity Develop 4-hour battery storage additions to the system targeting at least 100MW in-service by 2030, with battery storage additions beginning by 2025. Continue to explore the potential benefits of additiona...

AI summary The proceeding recommends developing 4-hour battery storage capacity targeting 100MW by 2030, with initial additions by 2025. It also suggests exploring benefits of exceeding this target as part of the 2030 energy transition.

A. NSPI should maximize use of best practices competitive procurement to mitigate costs, risks in needed resource investments We note that the Evergreen Update includes a substantial amount of identified investments in the near term that a...

AI summary NSPI must adopt competitive procurement practices to manage costs and risks associated with significant near-term investments outlined in the Evergreen Update, including 1,500 MW wind, 200 MW solar, transmission upgrades, battery storage, and synchronous condensers by 2030.

4. Battery Energy Storage Resource Selection and Capacity Accreditation for Portfolio of Renewables and Battery Energy Storage, with Associated Peak Mitigation Effects from Hybrid and Demand Response Resources The model selects 4-hour dura...

AI summary The model selects 4-hour duration battery energy storage resources based on the ELCC parameter's effect on capacity value. Matter 10905, which is ongoing, addresses interconnection study needs. The table outlines battery resource additions by year and scenario.

In our opinion, the pre-IRP capacity value study from 2019 (used in the 2020 IRP) does not fully capture the diversity effects that exist among battery energy storage, wind, solar, and demand response resources, and the capacity accreditat...

AI summary The pre-IRP capacity value study from 2019 is criticized for not fully capturing diversity effects among battery energy storage, wind, solar, and demand response resources. This affects the PLEXOS model optimization and the ELCC profile used in the IRP update. An updated study is recommended to better reflect the interactive effects of these resources on portfolio ELCC and capacity expansion modeling.

8. Hydrogen as a Fuel or Hydrogen Production as Additional Load The model is allowed to select hydrogen as a zero emissions fuel in all runs. Notably, only 50 MW of hydrogen-fueled CTs are added, and very late in the planning horizon (2047...

AI summary Hydrogen as a fuel is only considered in a high-cost renewable energy scenario, adding 50 MW of CTs by 2047. Increased load from hydrogen production raises NPVRR but doesn't affect pre-2030 Action Items related to procurement and reliability.

Table 1. Modeling Scenario NPVRR Metrics Scenario Info, All Scenarios NZ 2035 Current Policy and TrendsAtlantic Loop Adjusted Atlantic Loop Timing CE1-E1-R1 AAT $ 18,700 $ 7,440 $ 26,140 $ 8,970 $ 8,970 NZ 2035 Current Policy and TrendsAtl...

AI summary The table presents various modeling scenarios with their corresponding Net Present Value of Revenue Requirements (NPVRR) metrics under different conditions, such as adjusted timing, wind integration constraints, and the inclusion of carbon capture or hydrogen. The scenarios explore the financial implications of different policy and infrastructure choices.

Diversity Benefit of Wind, Solar and Batteries Feedback received from Synapse, E1 and NRR requested additional study work to evaluate the additional effective load carrying capacity (ELCC) diversity benefit of having combinations of batter...

AI summary Feedback from Synapse, E1, and NRR requested further study to evaluate the diversity benefit of combining battery, wind, solar, and demand response resources in terms of effective load carrying capacity (ELCC). This highlights the need to assess how these resource combinations enhance system reliability and capacity.

simultaneously. As part of the 2019 Planning Reserve Margin and Capacity Value Study (Capacity Study), which informed the 2020 IRP, Energy and Environmental Economics (E3) calculated the diversity benefit of having both battery and renewab...

AI summary The 2019 Capacity Study, informing the 2020 IRP, quantified diversity benefits of combining battery storage with wind/solar, crediting 4.8 MW in 2030 for wind + storage. Solar + storage benefits were excluded from PLEXOS modeling due to the 2019 study's focus on wind + storage, with minimal solar inclusion in early IRP stages.

that correctly iden�fying the need for capacity is paramount for all subsequent IRP runs. The study should also ask whether energy to meet those peak demands should be stored in a batery, a tank, a lake or in a regionally linked, diversifi...

AI summary The text emphasizes the importance of accurately identifying capacity needs for Integrated Resource Plan (IRP) runs and evaluating energy storage options to meet peak demands. It also raises concerns about NS Power's ability to value bidirectional transactions over future transmission projects and the need to improve forecasting methods.

The ini�al analysis – failing to provide a clear ELCC for the three technologies together – was iden�fied to NSP the moment the ini�al report was presented, but, three years later, remains unaddressed. This error will make it difficult for...

AI summary The initial analysis failed to provide a clear ELCC for three technologies and remains unaddressed three years later, complicating the UARB's approval of new capacity construction. The ELCC diversity benefit of wind + storage was included in the Evergreen IRP model, but the diversity benefit of solar and storage was not included in the PLEXOS model due to limitations in earlier studies.

e renewable resource added in both the ini�al insights and dra� modeling results phases of the Evergreen IRP, with litle grid-connected solar seen in any resource plans at those stages of the process. NS Power notes that in the Final Model...

AI summary The document discusses the inclusion of renewable resources in the Evergreen Integrated Resource Plan (IRP), noting that grid-connected solar was not prominently featured in initial stages but became more significant in the Final Modeling Results. The inclusion of federal Investment Tax Credits is highlighted as a key driver for increased solar and storage deployment, with potential concerns about over-crediting diversity benefits.

batery energy storage, PHP is concerned with further study that could poten�ally delay firm inprovince resources which will be required to maintain the reliability of the system, especially with the addi�on of significantly greater amounts...

AI summary PHP emphasizes the need for expedited studies to avoid delays in firm in-province resources required for system reliability, especially with increased non-dispatchable renewables. The Evergreen IRP Update highlights the need for 300 MW of new fast-acting generation by 2027. The document also discusses the Federal Government's proposed clean electricity regulations and the importance of updating modeling work regularly.

While batery storage does assist with the curtailment issues, wind integra�on and capacity, and addi�onal batery storage is called for in the No Loop scenarios, NSPI lays out in some detail in its responses to stakeholder comments (see pag...

AI summary The text discusses the limitations of battery storage in replacing fast-acting generation and the need for synchronous condensers to support wind integration by 2030, as outlined by NSPI and PHP in their responses to stakeholder comments.

will be released to stakeholders for their review and NS Power will request feedback on the findings. will be evaluated by further study work (Updated Ac�on Plan page 7), including generator site– specific system impact studies for new var...

AI summary The document discusses the need for further study on the impact of adding synchronous condensers to the grid, particularly in relation to variable renewable generation. It highlights the potential cost implications and the need for a comprehensive, system-wide review rather than a site-specific approach. The Integrated Resource Plan (IRP) is referenced as requiring assessment of reserve margin, energy, and emissions value.

that correctly iden�fying the need for capacity is paramount for all subsequent IRP runs. The study should also ask whether energy to meet those peak demands should be stored in a batery, a tank, a lake or in a regionally linked, diversifi...

AI summary The text discusses the importance of accurately identifying capacity needs for Integrated Resource Plan (IRP) runs and explores options for storing energy to meet peak demands. It also highlights the need for clear standards in making trade-offs among energy resources and how customer behavior may evolve with changes in carbon pricing and technology.

The ini�al analysis – failing to provide a clear ELCC for the three technologies together – was iden�fied to NSP the moment the ini�al report was presented, but, three years later, remains unaddressed. This error will make it difficult for...

AI summary The initial analysis failed to provide a clear ELCC for three technologies, leading to unresolved issues that affect the UARB's ability to approve new capacity construction. The ELCC diversity benefit of wind + storage was included in the Evergreen IRP model, but the diversity benefit of solar and storage was not considered in the PLEXOS model due to limitations in earlier studies.

batery energy storage, PHP is concerned with further study that could poten�ally delay firm inprovince resources which will be required to maintain the reliability of the system, especially with the addi�on of significantly greater amounts...

AI summary PHP emphasizes the need for expedited decision-making on energy storage and new generation capacity to maintain system reliability, especially with increasing non-dispatchable renewables. The Evergreen IRP Update calls for 300 MW of new fast-acting generation by 2027. Future modeling refinement will not eliminate the need for new firm capacity.

While batery storage does assist with the curtailment issues, wind integra�on and capacity, and addi�onal batery storage is called for in the No Loop scenarios, NSPI lays out in some detail in its responses to stakeholder comments (see pag...

AI summary The text discusses the limitations of battery storage in replacing fast-acting generation and the need for synchronous condensers to support wind integration by 2030. NSPI explains that battery storage has duration limitations and must be supplemented with other resources during peak periods. PHP highlights the addition of 80 MVA of synchronous condensers for wind integration.

will be released to stakeholders for their review and NS Power will request feedback on the findings. will be evaluated by further study work (Updated Ac�on Plan page 7), including generator site– specific system impact studies for new var...

AI summary The document discusses the need for further study on the impact of variable renewable generation and the potential use of synchronous condensers. It also mentions the importance of evaluating battery storage implementation. NSPI's Action Plan and PHP's recommendations are referenced.

Acronyms Acronym Term BES Bulk Electric System BESS Battery Energy Storage System CI Control Interaction EMT Electromagnetic Transient FACTS Flexible AC Transmission System FFR Fast Frequency Response IBR Inverter Based Resource LVRT Low V...

AI summary The document outlines the acronyms and terminology used in the analysis of frequency control and system strength within the Bulk Electric System (BES), including terms related to power electronics, energy storage, and system impact studies.

This document outlines the general planning criteria and recommendations to specifically address large scale integration of Inverter Based Resources (IBRs) such as wind generation and grid scale battery projects. Results and observations f...

AI summary The document outlines planning criteria and recommendations for integrating large-scale Inverter-Based Resources (IBRs), including wind generation and grid-scale battery projects, based on results from first-stage assessments and studies.

ngth generally leads to increased network voltage volatility under normal and disturbed operating conditions. Potential concerns under low System Strength of a power system are summarized below [2,3]: - A weak system may take longer to sta...

AI summary Weak system strength in power systems can cause instability, voltage volatility, and degraded performance of inverter-based resources (IBR) like wind and BESS. Issues include delayed stabilization, poor ride-through responses, control interactions, torsional oscillations, and harmonic distortions. IBR requires a strong grid to maintain stable voltage and frequency at the point of interconnection.

1.2.2 System Strength - Perform a screening level assessment to benchmark 2023 SCMVA levels at 69, 138 and 230 KV buses. - Document minimum SCMVA at load sensitive locations. - Document minimum SCR at all Wind Plants, SVC and HVDC location...

AI summary The document outlines a system strength assessment for Nova Scotia's grid, focusing on benchmarking SCMVA/SCR levels, identifying IBR connection issues, and recommending support measures like BESS or synchronous condensers to maintain reliability by 2030. Initial findings are published ahead of full EMT study results.

o large and rapid voltage phase shifts. Until IBR technology is further advanced, some SIR will be required to maintain acceptable performance for an NSPI generation mix that includes large scale IBR. As mentioned previously, converter-bas...

AI summary The document discusses challenges in maintaining frequency control with inverter-based resources (IBR) in Nova Scotia's grid. IBR, such as wind energy converters (WECs), lack synchronous inertial response (SIR) and rely on fast frequency response (FFR). NSPI requires 4 Hz/s RoCoF ride-through for new generation, evaluated via PSS®E and PSCADTM studies. Solutions include synchronous generation, HVDC, and energy storage.

2.3 Iterative Assessment The initial assessment and metrics used for these studies follow the traditional load flow and dynamics methodologies with the intent to then take critical cases into PSCADTM for EMT analysis. Upon examination of t...

AI summary The text discusses an iterative assessment process for grid stability, focusing on the challenges of maintaining system inertia and frequency response with the integration of inverter-based resources (IBR). It highlights the need to decouple frequency control requirements from system strength requirements and outlines a multi-step approach to ensure system reliability.

Table 1: Minimum Inertia for Frequency Control, First Iteration Case Dispatch Thermal Units or Equivalent Dispatch Notes 1 Light Load 4 TUP, TR6, TUC2 & ML, Biomass / existing wind 2 Light Load 3 TUP, TR6 & TUC2/ existing wind 3 Light Load...

AI summary The table presents different cases for minimum inertia requirements in frequency control under various load conditions, including light load and winter peak scenarios, with varying combinations of thermal units, renewable energy sources, and energy storage systems.

- The light load cases were run with 6 variations. In light load, NSPI has sufficient wind and imports to serve load with 100% renewable energy. Hydro resources are offline. Variations of FFR and inertia were simulated with the goal of tak...

AI summary The text discusses simulations of light load and winter peak scenarios in Nova Scotia's power system, analyzing the use of wind, hydro, and battery energy storage systems (BESS) for stability and inertia. It also examines the impact of losing the New Brunswick tieline with high Nova Scotia imports.

o meet the load, while reducing the thermal units, new wind and BESS was added to the simulation cases. Load Flow and Dynamic assessment was performed for the loss of NB tieline with high NS imports. Case 5, with a low amount of inertia on...

AI summary The document discusses grid simulations analyzing the impact of reducing thermal units and adding renewable resources like wind and BESS. It highlights voltage issues under winter peak load conditions and the potential of FFR from IBRs to reduce reliance on synchronous resources for frequency control in the 2030 grid.

from IBRs as a potential source to reduce synchronous resources required to be online. IBR technology is evolving rapidly and both WEC and BESS may be able to support frequency in the 2030 timeframe. Notwithstanding the voltage issues and...

AI summary The document discusses the potential of Inverter-Based Resources (IBRs) such as Wind Energy Conversion (WEC) and Battery Energy Storage Systems (BESS) to reduce the need for synchronous resources in the 2030 timeframe. It also highlights the minimum inertia and Fast Frequency Response (FFR) requirements identified through iterative studies for maintaining stable frequency response during light load and winter peak load scenarios.

3.2 RoCoF Historically, there have been RoCoF requirements for generation facilities and some protection devices to ensure they function as expected during frequency swings. The requirements are as needed to stay online for a grid with goo...

AI summary The document discusses the Rate of Change of Frequency (RoCoF) requirements for the Nova Scotia Power Inc. (NSPI) grid, analyzing how changes in grid inertia due to the phasing out of synchronous generation and the increase of renewable generation affect RoCoF. Simulations show varying RoCoF values under different load and generation scenarios, with a 500ms sample time used for calculations.

Table 4: First Iteration for 2030 RoCoF Case Load Total Inertia (MW s) ML FFR RoCoF 51 Light Load 1044 50MW 2.65 52 Light Load 1102 0MW 3.41 53 Light Load 1603 offline 2.32 101 Peak Load 2404 50MW 3.02 102 Peak Load 2404 0MW 3.27 103 Peak...

AI summary The text discusses the analysis of RoCoF (Rate of Change of Frequency) under various load conditions and the impact of BESS (Battery Energy Storage System) FFR (Fast Frequency Response) support. Tables show the initial and revised inertia levels and RoCoF values, with BESS significantly reducing RoCoF. The study indicates that integrating BESS with FFR capabilities can reduce the inertia required for maintaining RoCoF below 2.5 Hz/s.

5.3 Detailed PSCADTM Simulation Detailed PSCADTM simulations are used to identify stability and fault ride though concerns and further assess potential RoCoF concerns. EMT simulations have become critical when integrating PE inverter-based...

AI summary Detailed PSCADTM simulations are used to assess stability, fault ride-through, and RoCoF concerns when integrating inverter-based resources (IBR) into AC networks. Traditional RMS simulations may miss critical design considerations, and EMT simulations are essential for identifying system challenges. Increasing short circuit levels and using synchronous support are recommended solutions, though new transmission may not be economically viable. Future NSPI grid analysis will explore IBR controls for system inertia and strength.

6.1.2 Grid Following and Grid Forming Inverters Typically, IBRs have been grid following – taking a reference signal from the grid and matching output to synchronize with the grid angle and voltage. System voltage and frequency is maintain...

AI summary The document discusses the transition from grid-following to grid-forming inverters in Nova Scotia's power system. As synchronous generators are retired and IBR penetration increases, system strength may decline, leading to synchronization issues. Grid-forming inverters, which can emulate synchronous machines and control voltage and frequency, are being explored as a solution to maintain grid stability in a high-renewables environment.

6.1.3 Fast Frequency Response [Figure 6](#page-49-0) in Section [7.1.2](#page-48-0) demonstrates the ability of FFR from an IBR in damping a frequency deviation for a system disturbance. FFR from HVDC, BESS and other fast acting devices wi...

AI summary This section discusses the role of Fast Frequency Response (FFR) from Inverter-Based Resources (IBR), HVDC, and Battery Energy Storage Systems (BESS) in stabilizing frequency deviations in Nova Scotia's power system during generation disturbances. These systems offer flexibility in rapidly adjusting power injection or consumption based on the state of charge.

6.2 BESS BESS can support the management of the energy supply in a renewable energy dominated NSPI system. Additionally, with appropriate specifications, the fast-acting nature of BESS inverters can also be used to mitigate stability relat...

AI summary Battery Energy Storage Systems (BESS) are highlighted for their ability to manage energy supply in a renewable energy-dominated Nova Scotia Power Inc. (NSPI) system and mitigate stability concerns through fast-acting inverters. They are considered a strong near-term candidate for providing grid-forming and virtual synchronous machine response.

6.5 Fast Acting Synchronous Generation As the penetration of IBR increases, many of the larger synchronous thermal units will be phased out or operating infrequently. To plan for peak load periods when sufficient wind and imports are not a...

AI summary As the use of inverter-based resources (IBR) increases, traditional synchronous thermal units may be phased out. To address potential energy shortfalls during peak load periods, fast acting synchronous generators will be deployed. These generators can also function as synchronous condensers to support the local grid when not generating power, increasing their overall value.

6.7 Operating Guidelines It is important to consider credible operating conditions when identifying potential issues and corresponding additional investments to strengthen the system. As an example, curtailing a portion of wind output duri...

AI summary The text discusses the importance of considering credible operating conditions when identifying system issues and potential investments. It suggests that curtailing wind output during outlier conditions may be more cost-effective than building a more robust system. It also notes that curtailed wind farms can be used for AGC control and provide FFR to the grid.

7.1.2 Minimum System Inertia and FFR The PSC study [23] performed for NSPI in 2019 documented the following: - A minimum of 3266 MW.sec of synchronous inertia will be required for steady state operation. - o Synchronous condensers generall...

AI summary The document discusses the minimum system inertia and Fast Frequency Response (FFR) requirements for Nova Scotia Power Inc. (NSPI), noting that a minimum of 3266 MW.sec of synchronous inertia is required for stable operation. It highlights various sources of inertia and FFR, including thermal units, hydro plants, biomass facilities, and the Maritime Link. The approach to maintaining inertia is based on RoCoF limits and current operating guidelines.

7.2.2 Resource Planning for High IBR Penetration Recommendations to facilitate current and future economic generation dispatch for increased renewables on the timelines in place for Nova Scotia: - Update IBR and inertia constraints for Ple...

AI summary The document discusses resource planning for high Inverter-Based Resources (IBR) penetration in Nova Scotia, emphasizing the need to update models, incorporate frequency response, and maintain system strength through inertia or Frequency Response (FFR) as key metrics for stable grid operation.

8 References - [1] "Fast Frequency Response Concepts and Bulk Power System Reliability Needs", NERC Inverter-Based Resource Performance Task Force, March 2020 - [2] "Experiences with Wind Power Plants with Low SCR", Lessons learned from th...

AI summary The document provides a list of references related to power system reliability, renewable energy integration, and grid management, including studies on inverter-based resources, system strength, and high-voltage direct current (HVDC) systems.

e designs and demand response programs. AMI enables widespread adoption of TOU rates, which are a good starting point for encouraging load to shift from on- to off-peak periods. However, TOU rates do not facilitate customer responsiveness...

AI summary The text discusses the importance of advanced metering infrastructure (AMI) in enabling time-of-use (TOU) rates and dynamic rate strategies to manage load shifts and support flexible electrification technologies. It highlights the need for cost-effective communication and interconnection requirements, and mentions Vehicle Grid Integration (VGI) as an early use case. The text also notes the potential of offering electric rates for all-electric customers using heat pumps, while cautioning against cost shifting.

effective managed charging by offering more dynamic rates that better capture hourly variations in electricity prices. Charge management requires and leverages advanced metering infrastructure (AMI). EVs can also participate in V2G chargin...

AI summary The text discusses the importance of dynamic electricity rates and advanced metering infrastructure (AMI) in enabling effective managed charging for electric vehicles (EVs). It also highlights the potential for V2G (Vehicle-to-Grid) charging, where EVs can supply energy back to the grid, requiring appropriate export rates and market mechanisms. FERC Order 2222 is mentioned as a relevant regulation in the U.S.

A summary of transit bus cost-benefit analysis ratios are shown in [Table 4-5.](#page-65-1) Table 4-5. Cost-benefit analysis results for transit busses 2022 2030 Charging Scenario PCT RIM SCT PCT RIM SCT Unmanaged 0.7 1.7 0.9 0.8 1.5 1.2 M...

AI summary A cost-benefit analysis of transit bus charging scenarios shows net costs in 2022 but net benefits by 2030 due to lower vehicle costs and higher diesel prices. Charging scenarios include unmanaged and managed with TOU and VGI, with managed scenarios showing slightly better ratios.

). See section [9.2](#page-113-0) for detailed BCA assumptions. Key Finding 4. Utility actions to manage transportation loads will be crucial to minimizing costs and achieving ratepayer benefits. In the transportation sector, time of use r...

AI summary Key Finding 4 emphasizes the importance of utility actions, such as time-of-use (TOU) rates and smart programs, to manage transportation load and avoid rebound peaks. Key Finding 5 highlights the need to encourage advanced building technologies like heat pumps and energy efficiency measures to mitigate peak load impacts.

Transmission System Design and SMEs - Developing good quality EMT simulations models: - o Faster response to grid disturbances - o Higher frequency oscillatory response - o Work with IC, OEM, Simulation and EMT consultants - Existing Plant...

AI summary The document outlines the development of EMT simulation models to enhance grid response, the modeling of existing and new plant technologies, and the importance of accurate load modeling, including non-traditional loads like EVs and hydrogen.

General Findings - IBR for Frequency Support Grid Following Limits - IBR for System Strength - Minimum Inertia and FFR - o Non traditional sources can reduce the need for synchronous support - o A sliding load/IBR generation online scale w...

AI summary The document discusses technical aspects of inverter-based resources (IBR) for frequency support and system strength, the development of a sliding load/IBR generation scale, EMT model quality, and operability considerations including dispatch guidelines, inertia, and uncontrolled distributed energy resources (DER).

, on December 22, 2023, NS Power filed its "Path to 2030" plan, which was subsequently made part of the 2024 ACE Plan proceeding, describing how the Utility will meet its 2030 decarbonization targets. Finally, on April 5, 2024, the Legisla...

AI summary NS Power submitted its 'Path to 2030' plan, integrated into the 2024 ACE Plan proceeding. The Energy Reform (2024) Act establishes a new IESO to take over integrated resource planning from NS Power. The Board accepts the Evergreen IRP Update but urges further analysis of battery storage and renewable resource interactions, emphasizing the urgency of meeting 2030 decarbonization targets.

Solar, Storage and Battery Capacity interplay Synapse addresses this issue more comprehensively in its comments on the Evergreen update, and NRR agrees with Synapse that correctly identifying the need for capacity is paramount for all subs...

AI summary Synapse and NRR emphasize the critical need for accurate capacity identification in IRP runs, citing unresolved issues in the initial analysis that failed to provide a clear ELCC for solar, storage, and battery technologies. This omission risks delaying UARB approval of new capacity due to lingering doubts about necessity.

2. Hybrid Peak Mitigation, Battery Storage, and New Fast-Acting Generation On the issue of ongoing study of the hybrid peak mitigation scenario, PHP notes NSPI's stated support at page 4 of its responses to stakeholder comments for a multi...

AI summary PHP supports a third-party-led multi-stakeholder process to analyze hybrid peak mitigation but raises concerns about Synapse's uncertainty regarding battery storage's capacity value and the need for updated IRP analysis before committing to CT additions by 2029–2030.

Fast Acting Generation and Coal to Gas Conversions NSPI Action Plan Item 3c includes the initial development of approximately 300MW of new fastacting generating capacity by 2027 and an additional 300-600MW by 2030, to address growing deman...

AI summary NSPI plans to develop 300-900MW of fast-acting generation by 2030, emphasizing fuel flexibility and hydrogen. Synapse questions the robustness of coal-to-gas conversions and battery storage, while Eastward supports natural gas and hydrogen as critical for reliability. The IRP Evergreen Update highlights the need for flexible resources to integrate renewables.

RE: Energy Storage Canada Submission on 2023 Evergreen IRP Action Plan & Roadmap Update (M11307) Energy Storage Canada (ESC) is the national trade association dedicated to accelerating the deployment of energy storage projects and technolo...

AI summary Energy Storage Canada (ESC) submitted comments to Nova Scotia Power Inc. and the Nova Scotia Utility and Review Board regarding the 2023 Evergreen IRP Action Plan & Roadmap Update (M11307), emphasizing their participation in stakeholder sessions and advocating for energy storage deployment.

Appendix: ESC Submission on 2023 Evergreen IRP Action Plan & Roadmap Update (M11307) - 1. " In the Nova Scotia context with the expected increase in variable renewable energy resources, expansion of transmission ties, and phase out of coal...

AI summary ESC argues that energy storage will play a critical role in Nova Scotia's energy future due to increasing renewables and coal phase-out. They highlight storage's contributions to firm capacity, peak shaving, and reduced wind curtailment, noting the current IRP underestimates its potential due to modeling limitations.

Recommendations - 5. Energy storage can be the solution to so many of the challenges that Nova Scotia must navigate to realize the coal phase-out, and 80% renewable electricity, by 2030 targets. There are many energy storage projects and/o...

AI summary ESC recommends a more comprehensive review of energy storage in future IRPs, arguing current plans understate its potential. They propose an IRP Roadmap Item to explore both short- and long-duration technologies, emphasizing stakeholder input to address technical, policy, and market factors.

into the estimation of avoided costs of T&D. E1 expects these avoided costs to grow - with increased level of system build-out anticipated as part of increased load growth in coming - years. - Action Plan Item 4b: Hybrid Peak Mitigation Sc...

AI summary NS Power and E1 collaborate on initiatives including hybrid peak mitigation, wind integration studies, renewable cost tracking, and electrification forecasts. E1 emphasizes non-technical factors, demand response, and updating load forecasts. Both parties agree on monitoring solar, storage costs, and IRP evolution.

- The Consumer Advocate and Small Business Advocate noted the need to assess future hydrogen development (load, generation) in Nova Scotia and the need for tariff development to support hydrogen production. NS Power noted that hydrogen pro...

AI summary The Consumer Advocate and Small Business Advocate emphasized the need to assess hydrogen development and tariff requirements in Nova Scotia. NS Power clarified that hydrogen-related initiatives are outside the Evergreen IRP process but may tie back through roadmap items. Synapse, E1, and NRR recommended studying the ELCC diversity benefits of combining battery, wind, solar, and demand response resources, noting that wind + storage credits were included in the 2020 IRP, while solar integration increased due to federal tax credits. NS Power expressed concerns about potential 'double counting' of diversity credits.

, on December 22, 2023, NS Power filed its "Path to 2030" plan, which was subsequently made part of the 2024 ACE Plan proceeding, describing how the Utility will meet its 2030 decarbonization targets. Finally, on April 5, 2024, the Legisla...

AI summary NS Power's 'Path to 2030' plan is part of the 2024 ACE Plan proceeding. The Energy Reform (2024) Act establishes a new IESO to take over integrated resource planning. The Board accepts the Evergreen IRP Update but requires further analysis on battery energy storage ELCC and renewable resource interactions. Urgency for 2030 decarbonization targets and engagement with government agencies are emphasized.

Effective Load Carrying Capability (ELCC) Study Scope Memo February 6, 2025 In its Decision letter of May 23, 2024, regarding NS Power's 2023 Evergreen IRP Update (Matter M11307), the Board highlighted certain Synapse recommendations and s...

AI summary The Nova Scotia Utility and Review Board directed NS Power to update its ELCC study to assess interactive effects of wind, solar, battery storage, and demand response. NS Power supports the update, plans to develop a scope of work by year-end, and proposes three study topics: resource interaction analysis, demand response ELCC recalibration, and seasonal ELCC assessment. The Board emphasized refining diversity benefits and aligning with current programs.