Topic:"Energy Storage" in M11764

1 Figure 5: Firm Capacity Changes & DSM New Resources 2025-2034 Net MW DSM Peak reduction 241 Demand Response (Firm contribution) 15 14F 38 Total Demand Side MW Change Projected Over Planning Period 279 Maintenance/Repairs: Hydro derates d...

AI summary The document presents a summary of firm capacity changes and demand-side management (DSM) contributions from 2025 to 2034. It outlines reductions in peak demand through DSM initiatives, additions from new renewable energy sources, and maintenance/repair impacts, including the Wreck Cove LEM project.

S 17 Represents additional wind projects above and beyond the Rate Based Procurement Program or Green Choice Program from 2030-2034 in alignment with Evergreen IRP Scenario CE1-E1-R2. DATE FILED: June 27, 2024 Page 16 of 67 2024 10-Year Sy...

AI summary The document outlines additions and retirements in the 2024 10-Year System Outlook Resource Plan, including new wind and battery storage projects, with details on installed and firm capacities. These additions align with the Evergreen IRP Scenario CE1-E1-R2 and are part of NS Power's ongoing planning and adjustments.

stalled capacity 58.5 MW • Total RTR capacity 148.5 MW • New firm capacity 6 MW20 • Total RTR firm capacity: 15 MW Battery Storage – NS Power BESS • Installed capacity: 50 MW • Firm capacity: 23.7 MW Solar - NS Community Solar Program • In...

AI summary The document outlines stalled and new capacity additions and retirements for the 2024 10-Year System Outlook, including details on renewable energy installations, battery storage, and combustion turbine retirements.

MW • Lingan 2 (-148 MW) • Firm Capacity: 300 MW Battery Storage • Installed capacity 150 MW • Firm Capacity: 48.5 MW Solar - NS Community Solar Program • Installed capacity 25 MW • Firm capacity: 0 MW • Diversity capacity credit: 3 MW 2028...

AI summary The document outlines the installed and firm capacity of various energy generation and storage projects in Nova Scotia, including wind, solar, battery storage, and coal-to-gas conversions, with projections spanning from 2024 to 2032.

12 - T 597 07-May-21 Queens 36.00 36.00 50W Wind 30-Sep-25 GIA NRIS Executed 13 - T 647 06-Oct-21 Cumberland 1.50 1.50 37N Tidal 31-Dec-23 GIA in NRIS Progress 15 - D 654 16-Feb-22 Halifax 0.125 0.125 127H- Solar 20-Sep-22 GIA N/A 413 Exec...

AI summary The document presents a list of generation and storage projects, including their locations, capacities, technologies, completion dates, and associated agreements. These projects include wind, tidal, solar, and battery systems across various regions in Nova Scotia, with some projects in progress and others completed.

Complete 21 - T 668 03-Aug-22 Antigonish 94.40 94.40 L-7003 Wind 01-Apr-26 FAC NRIS Complete 22 - T 618 21-Jul-21 Guysboroug 130.20 130.20 L-7003 Wind 30-Sep-25 FAC NRIS h Complete 23 - T 673 09-Aug-22 Hants 33.60 33.60 L-6054 Wind 31-Dec-...

AI summary The text presents a list of energy generation and infrastructure projects, including wind and solar installations, along with associated details such as location, capacity, completion dates, and related terms like FAC, SIS, and NRIS.

ling. This needs to be carefully re- 13 examined in conjunction with an updated portfolio ELCC analysis, which considers 14 the interactive effect of all four clean resources (i.e., wind, solar PV, battery energy 15 storage, and demand res...

AI summary The document discusses the need for an updated portfolio ELCC analysis considering the interactive effects of clean resources like wind, solar PV, battery energy storage, and demand response during winter peak periods. The Board supports further study to evaluate the incremental diversity benefits from increased interaction among renewable resources.

2,71 2,720 2,718 2,739 2,767 2,833 2,876 2,925 2,982 3,051 C Required Capacity (A + B) 1 Existing Resources (NS Power 2,55 2,551 2,551 2,551 2,551 2,551 2,551 2,551 2,551 2,551 D and IPPs) 1 Existing Resources 4 4 4 4 4 4 4 4 4 4 (Wholesal...

AI summary The text presents a table outlining required capacity, existing resources, and various resource additions including biomass, hydro, tidal, and wind energy. It also includes procurement details for new wind and gas conversion projects.

150 O Conversion P Additions - New Gas CTs 300 300 Q Additions - Battery 72 24 49 36 Additions - Coal to HFO 459 R Operation S Diversity Credit 3 3 3 3 -298 -150 -781 T Retirements Total Annual Firm Additions -57 182 80 54 36 17 24 12 12 1...

AI summary The document presents a 10-year system outlook for NS Power, detailing cumulative firm additions and total firm capacity from the winter of 2024/2025 to 2033/2034. It includes data on new gas CTs, battery additions, and retirements, reflecting the evolution of the energy infrastructure over time.

27/2028 - 2025 $940M 2 Stage 1 1F Fast Acting Gen - 300 2029/2030 - - - Stage 2 Gas Conversion 150 2028/2029 - - $39M 3, 4 (Point Tupper) 2F 3F HFO Operation - 459 2029/2030 - - $0.6M3,4 Lingan 1/3/4 14 1 N-12, UARB Approval Sheet, Nova Sc...

AI summary The document outlines capital expenditures for energy projects in Nova Scotia, including a Battery Energy Storage System (BESS) and gas conversion initiatives. It references the 2024 ACE Plan and Evergreen IRP assumptions, with costs estimated in 2022 dollars. NSPI seeks NSUARB approval for these projects, citing directional cost estimates.

significant technical challenges that can be identified through careful planning and detailed studies, and mitigation measures implemented to ensure safe and reliable operation of the electric system. The system studies scope to understand...

AI summary The document outlines technical challenges in integrating 80% renewables into Nova Scotia's grid, emphasizing the need for EMT studies and mitigation measures. Key findings indicate that NSPI can incorporate renewables but will require grid support as legacy plants are phased out. Concerns are raised about the system's ability to handle high RoCoF events, potentially leading to cascade tripping.

4 2024 10-Year System Outlook Report NSUARB IR-15 Attachment 1 Page 14 of 60 Frequency Control and System Strength Assessment The design of PE interfaced devices under low inertia and low SCR is technically challenging. To overcome these t...

AI summary The document discusses technical challenges related to frequency control and system strength in power systems with low inertia and low short circuit ratio (SCR). It highlights concerns such as reduced system stability, voltage control, fault ride-through capabilities, and control interactions, based on expert analysis and literature review.

es in close proximity, leading to unstable or poorly damped oscillations. • Impact from torsional oscillations, sub synchronous Interactions (SSTI), on thermal generator shafts. There has been much study and industry discussion on how to m...

AI summary The document discusses challenges related to frequency control and system strength in power systems with high penetration of renewables and power electronics. It highlights the need for careful planning and specialized studies, such as electromagnetic transient simulations, to address low short circuit ratios (SCR) and sub-synchronous interactions (SSTI) caused by the phasing out of thermal plants and the integration of renewable energy sources.

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 the 2024 10-Year System Outlook Report, focusing on identifying potential issues related to system strength, fault levels, and control interactions, and recommending measures such as synchronous condensers and BESS to maintain grid stability by 2030.

ts and ultimately, the stability of the overall system. High SCR is an indication of the presence of synchronous machines in the local area and/or a strong, meshed transmission system. SCR, including Effective SCR and Weighted SCR, has bee...

AI summary The document discusses the importance of Short Circuit Ratio (SCR) in assessing grid stability and system strength when integrating new inverter-based resources (IBR) into the grid. MHI recommends conducting full grid studies and annual assessments to ensure frequency control and system strength requirements are met as renewable penetration increases.

ies compensated transmission lines in the local area. • Specific technology (vendor specific) and specific protection and control settings of the PE inverters and other plant equipment. • The MW rating or the MW output of the PE based plan...

AI summary The document discusses the impact of inverter-based plants on system strength and frequency control, emphasizing the importance of considering reactive power capacity and dynamic response under weak grid conditions. It highlights the need for detailed studies and the relationship between inertia constraints and system strength analysis.

ould cause a drop in reliability for customers. MHI recommends maintaining, and where possible improving the grid conditions to enable generation and customer load to ride-through system disturbances. As an example, with results of the fir...

AI summary The text discusses the impact of replacing traditional generation with IBR on grid reliability, highlighting the need for grid improvements to maintain system stability. It notes that while IBR can provide frequency support, System Strength support is still under development and not commercially viable in many cases.

ro resources are offline. Variations of FFR and inertia were simulated with the goal of taking inertia as low as possible while providing for well damped and stable frequency response. • The cases for winter peak are more complex. Small hy...

AI summary The document discusses simulations of frequency response and inertia variations, the complexity of winter peak cases requiring small hydro and thermal resources for stability, and the potential use of wind and BESS to reduce reliance on thermal units. Load flow and dynamic assessments were conducted for the loss of the NB tieline with high NS imports.

he 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 online, di...

AI summary The analysis discusses system reliability under varying thermal unit configurations and the impact of renewable energy and battery storage. Winter peak load cases showed voltage issues as thermal units decreased, and RoCoF exceeded 4 Hz/s in some scenarios. The Maritime Link with FFR can reduce inertia requirements, and future grid planning considers FFR from IBRs to support frequency control.

2024 10-Year System Outlook Report NSUARB IR-15 Attachment 1 Page 26 of 60 Frequency Control and System Strength Assessment Table 2: Minimum Inertia and FFR Required for Frequency Control Total Case Dispatch Inertia Dispatch Notes (MW s) 5...

AI summary The document discusses the frequency control and system strength assessment for the 2024 10-Year System Outlook Report, focusing on inertia and Fast Frequency Response (FFR) requirements under various dispatch scenarios, including light and peak load conditions with maximum renewable energy integration.

901 MW new wind, 182 MW BESS Winter peak load has the highest inertia requirement for stable frequency response. The case dispatches for the peak load, with maximum renewables: • System load 2145 MW (2030 peak as forecast in 2020), includi...

AI summary The document discusses the impact of renewable energy and battery storage on frequency response and RoCoF in Nova Scotia's power system. It highlights the need for FFR as synchronous generation declines and renewable generation increases, referencing NERC's whitepaper on FFR and bulk power system reliability.

19 2024 10-Year System Outlook Report NSUARB IR-15 Attachment 1 Page 29 of 60 Frequency Control and System Strength Assessment As BESS grid support capability is evolving rapidly, a test run was initiated on the 6 RoCoF cases with 200MW of...

AI summary A test run was initiated to assess the impact of BESS FFR support on RoCoF in various load cases. The results show a significant reduction in RoCoF, indicating that integrating BESS with FFR capabilities can reduce the inertia required for frequency control on the NSPI grid.

le maximum wind study, with and without a second 345kv tie to New Brunswick, is ongoing and will provide direction on the quantity and location of grid support mechanisms. 4.4.5 Stability Requirement When sufficient inertia, FFR and reacti...

AI summary The document outlines ongoing studies regarding grid stability and frequency control, including the development of an EMT model in PSCADTM by NSPI with MHI. These studies assess the need for grid support mechanisms and analyze stability requirements based on inertia, FFR, and reactive support criteria.

acting exciters and PSS. • Interactions between windfarms. • Interactions between HVDC ties (Ex: Nemo & Nautilus in Europe) and windfarms. • Interaction with the rest of the AC power system. ERCOT has dealt with sub synchronous interaction...

AI summary The text discusses challenges in frequency control and system strength assessment, including sub-synchronous resonance (SSR) and synthetic inertia resource (SIR) interactions. It highlights difficulties in detecting SSR/SSCI events, the need for detailed EMT simulations, and the complexity of controller tuning. Mitigation strategies are vendor-specific and require collaboration.

rators online, they have identified grid forming inverters as having the potential to support System Strength over and above what is needed to facilitate their own connection to the grid [19]. • The Dalrymple Battery Energy Storage System,...

AI summary Grid forming inverters, such as those used in the Dalrymple Battery Energy Storage System in South Australia, can enhance system strength and provide reliability services, enabling higher levels of renewable energy integration. These inverters replicate the behavior of synchronous machines and offer services like fast power injection and seamless islanding.

istribution network [21, 22]. The addition of frequency control, System Strength and high fault current from the grid forming BESS can allow higher levels of renewables to connect and operate. • The Maritime Link (ML), a VSC HVDC link betw...

AI summary The document discusses the role of frequency control and system strength in the distribution network, highlighting the benefits of grid-forming battery energy storage systems (BESS) in supporting higher levels of renewable integration. It also describes the Maritime Link (ML), a VSC HVDC link between Nova Scotia and Newfoundland, which provides frequency support and system stability during contingency events.

. • First Stage Studies assessment of inertia (including RoCoF) and SCMVA based on PSS®E studies, considering the present system and the 2030 projected system. 7.1 Findings NSPI can incorporate renewables, in particular IBR resources, limi...

AI summary The document discusses the integration of Inverter-Based Resources (IBRs) into the grid for frequency and system strength support, noting that while IBRs were previously not considered effective for this purpose, new control strategies have changed this. NSPI can incorporate renewables, but technical challenges and the need for grid support are highlighted as significant considerations.

very quickly to help frequency recovery in Nova Scotia as it passed the triggering threshold. Seconds Figure 6: Maritime Link Frequency Response Based on the above, with new technology and FFR capability, the inertia requirement for stable...

AI summary The document discusses frequency control and system strength in Nova Scotia, highlighting how new technologies like FFR can dynamically meet inertia requirements. It notes that the minimum inertia requirement ranges from 2224 MW s to 3181 MW s, and FFR can reduce these values. The assessment focuses on frequency control, with additional SIR requirements depending on location.

time data needs may increase substantially and real time calculations for inertia and SCMVA at critical buses may need to be visible to Transmission Operations staff. • Distributed Energy Resources Increases in the total MW of DER and othe...

AI summary The document outlines potential challenges and recommendations related to system strength, distributed energy resources, protection and control, motor load customers, and transformation in the context of grid modernization and increasing renewable energy integration.

of inverter-connected generation”, CIGRE WG C4.56 Technical brochure, 2022 [7] “Modelling and Simulation Studies to be performed during the lifecycle of HVDC systems”, CIGRE Working Group B4.38, 2013 [8] “A novel virtual synchronous machin...

AI summary The text references various technical documents and studies related to frequency control, system strength, and the integration of inverter-based resources into power systems, including guidelines from CIGRE, IEEE, and NERC.

eries, December 2022 [15] “Practical experience with mitigation of sub-synchronous control interaction in power systems with low system strength”’ Cigre Science and Engineering, Vol No. 21, June 2021 [16] Di Wu, Gangan Li, Milad Javadi, et...

AI summary The document references various studies and reports on power system stability and renewable energy integration, including analyses of sub-synchronous control interaction, system strength, and grid-forming energy storage systems. It also includes a reference to a stability study conducted by Nova Scotia Power for renewable integration.

Path to 2030 2024 10 YSO Project Reconciliation Capacity (MW) Year Capacity (MW) Winter As indicated in the Nova Scotia Power Incorporated Battery Energy Storage System (BESS) Project Capital Cost Approval Application (M11539) two NS Power...

AI summary The Nova Scotia Power Inc. BESS Project (M11539) seeks approval for two 50 MW battery storage sites in 2025 and a third in 2026, with capacities available for winter periods. The application details implementation timelines and aligns with provincial regulatory processes under Section 4D.

, no projects under Provincial Section Provincial 4D have come forward. Section 4D NS Power estimates the 150 2026 150 2027/2028 Energy Storage earliest online date for any Projects new projects to be available for the Winter 2027/2028 per...

AI summary NS Power reports no projects under Provincial Section 4D have advanced, with energy storage projects under Section 4B estimated to be online by Winter 2029/2030. Timelines for Section 4D projects remain unchanged, with no new developments reported.

1 regional system operator, NS Power suggests a pause until the NSIESO is operating 2 successfully as an independent entity and then encourage that organization to 3 engage with neighbouring utilities. 16 4 5 It is appropriate to address t...

AI summary NS Power recommends pausing engagement with neighboring utilities until the NSIESO operates independently. The CA highlights a discrepancy between NS Power's Path to 2030 submission and its BESS project positioning, questioning whether merging ECEI and Section 4D projects into a single 150 MW application reduces anticipated energy storage capacity through 2029. NS Power awaits Board feedback on its August 2024 letter.

of the ECEI and Section 4D battery storage projects into a single 150 MW project 23 application represents a reduction in anticipated energy storage projects through 2029”. 19 24 The Path to 2030 provided the following: 25 16 NS Power Lett...

AI summary The document discusses the consolidation of ECEI and Section 4D battery storage projects into a single 150 MW initiative, noting a reduction in anticipated energy storage projects through 2029. It references the 2024 10-Year System Outlook Report and includes submissions from the Consumer Advocate and NS Power regarding regional dispatch optimization and system outlook.

1 In addition to NS Power’s 150 MW ECEI BESS project (described below), NS 2 Power anticipates that up to an additional 150 MW may be designated by the 3 Province under Section 4D in the near term (anticipated in Q2-2024 with an in- 4 serv...

AI summary NS Power's 150 MW BESS project, along with additional 150 MW under Section 4D and 100 MW under Section 4B of the Electricity Act, aims to reach 400 MW of battery storage by 2030, as mandated by provincial regulations. The Province retains prerogative to procure under both sections.

ncial Section 4B projects for a total of 400 MW of 4-hour battery storage capacity by 25 2030. Likewise, Figure 6: Additions and Retirements as in the 10-Year System Outlook Resource 26 Plan in the Report shows the same expected battery ca...

AI summary NS Power projects 400 MW of 4-hour battery storage by 2030, citing the 10-Year System Outlook Report. The Consumer Advocate (CA) highlights Reliability Tie risks, referencing prior proceedings (M11458, M11539). NS Power states no updates to battery capacity plans.

Document: 305605 Date Filed: Aug. 27, 2024 NSUARB (NS Power) Page 1 of 6 1 Request IR-1: 2 Referencing pages 6 and 15 of 67, NS Power stated that Evergreen scenario CE1-E1-R2 (net 3 zero 2035, current policy and trends for electrification,...

AI summary NS Power selected the Evergreen scenario CE1-E1-R2 for its 2024 10-Year System Outlook due to alignment with provincial and federal decarbonization targets, despite other evaluated plans having lower costs. The Board highlighted the need for further study on battery energy storage's ELCC profile and interactive effects of renewable resources, as recommended by Synapse.

ak mitigation scenario, 26 and an updated analysis of battery energy storage capacity, prior to any significant 27 commitment regarding 2029 or 2030 CT additions. This work needs to proceed. 28 29 Figure 6 on page 18 notes the addition of...

AI summary The text requests updates on NS Power's progress with two recommendations related to mitigation scenarios and battery storage analysis. It references combustion turbine capacity additions (300 MW in 2027/2028 and 2029/2030) and cites a prior response to Board IR-3 in Matter M11221 regarding Nova Scotia Block's winter peak capacity.

Please refer to: David Roberts Email: [email protected] Assistant: Heidi Day Assistant’s email: [email protected] October 4, 2024 VIA EMAIL Crystal Henwood Regulatory Affairs Officer/Clerk of the Board Nova Scotia Utility and Revie...

AI summary The Consumer Advocate submits comments on Nova Scotia Power’s 2024 10-Year System Outlook Report, highlighting major changes including new wind and battery resources, coal-to-gas conversions, and a new intertie facility with New Brunswick, informed by prior planning documents and updated data.

eratives of (1) engaging with other utilities on regional joint dispatch and (2) supporting the formation of the Nova Scotia Independent Energy System Operator are contradictory. Finally, it is also worth noting a discrepancy between NS Po...

AI summary NS Power faces contradictions in its support for regional joint dispatch versus NSIESO formation. Discrepancies exist between its 2024 ACE Plan and energy storage application regarding 150 MW projects. The Reliability Tie is highlighted as critical for grid reliability but not for firm capacity access.

d geothermal system resources to be an emerging technology that it will “monitor” along with small modular nuclear reactors, which have not been demonstrated at production scale. Respectfully, Nova Scotia Power appears to have misapprehend...

AI summary The Consumer Advocate argues that Nova Scotia Power (NSP) underestimated the potential of enhanced geothermal systems and requests the Board to encourage deeper evaluation. They also seek clarification on NSP's hybrid peak scenario, regional dispatch engagement, and energy storage project reductions, as well as assurances for system reliability during dual-outage events.