N-3NS Power 2019 Ten Year System Outlook dated July 2, 2019
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..... 19 15 3.3.4 Steam Fleet Retirement Outlook ......................................................................................... 25 16 4.0 NEW SUPPLY SIDE FACILITIES ..................................................................
AI summary The document outlines sections of a regulatory proceeding, including environmental requirements, resource adequacy, transmission planning, and policy changes. Key topics include renewable energy mandates, emissions regulations, reserve criteria, and upcoming policy adjustments in Nova Scotia's energy sector.
................................................................................................ 45 29 8.0 TRANSMISSION PLANNING ........................................................................................ 51 30 8.1 System Desc...
AI summary The document outlines a 2019 Ten-Year System Outlook, focusing on transmission planning and system description under section 8.0. It includes subsections on transmission design criteria and system description, dated July 2, 2019, and marked as non-confidential.
32 8.2.1 Bulk Power System (BPS) .................................................................................................. 53 33 8.2.2 Bulk Electric System (BES) .......................................................................
AI summary The document outlines sections related to bulk power systems, bulk electric systems, transmission planning, and grid modernization from 2019 to 2029. Topics include transmission life extension, project approvals, wind integration studies, and development plans for the Western Valley Transmission System. The conclusion section is also referenced.
1 TABLE OF FIGURES 2 3 Figure 1: Net System Requirement with Future DSM Program Effects (actuals are not adjusted for 4 weather) .................................................................................................................
AI summary The document lists figures analyzing demand-side management (DSM) program impacts on system requirements, generating capacity, energy mix forecasts, and infrastructure investments. Key themes include DSM effects on peak demand, firm generating capability, energy mix trends, and transmission/distribution interconnection queues.
regulatory requirements, as well as 17 forecast compliance in Section 6. This section also includes projections of the 18 level of renewable energy available. 19 20 • A Resource Adequacy Assessment in Section 7. 21 22 • A discussion of tra...
AI summary The document outlines the NSPSO system plan, covering transmission investment, DSM programs, generation planning, and new generating facilities. It references the 2019 Ten-Year System Outlook and the UARB-directed IRP process, with pre-IRP deliverables nearing completion by July 31, 2019.
Page 27 of 67 2019 Ten-Year System Outlook NON-CONFIDENTIAL 1 5.0 QUEUED SYSTEM IMPACT STUDIES 2 3 Figure 12 below provides the current combined Transmission and Distribution Advanced 4 State Interconnection Queue. 5 6 Figure 12: Combined...
AI summary This section outlines the queued system impact studies for the 2019 Ten-Year System Outlook, including details on various interconnection requests, their associated capacities, and statuses, such as GIA Executed and SIS Complete.
, 2019 Page 29 of 67 2019 Ten-Year System Outlook NON-CONFIDENTIAL 1 5.1 OATT Transmission Service Queue 2 3 There is presently one request in the OATT Transmission Queue, as shown in Figure 14. 4 5 Figure 14: Requests in the OATT Transmis...
AI summary The document outlines the current status of the OATT Transmission Service Queue, noting one pending request related to a 330 MW project between Nova Scotia and New Brunswick. It also introduces a section on environmental and emissions regulatory requirements for the 2019 Ten-Year System Outlook.
NSPSO’s OASIS site in the Forecast and Assessments Section. Figure 24 shows a 12 graphical representation of NS Power’s 18 month assessment with the updated 2019 Load 13 forecast. DATE FILED: July 2, 2019 Page 49 of 67 2019 Ten-Year System...
AI summary The document discusses NS Power's 18-month load and capacity assessment, including the existing transmission system with details on the length and configuration of transmission lines at various voltage levels.
1 The 138 kV transmission system is approximately 1871 km in length and is comprised of 2 303 km of steel structures and 1568 km of wood pole lines. 3 4 The 69 kV transmission system is approximately 1560 km in length and is comprised of 5...
AI summary The document outlines the length and composition of Nova Scotia's 138 kV and 69 kV transmission systems, as well as its interconnections with New Brunswick and Newfoundland. It also discusses NS Power's transmission design criteria and the integration of the Maritime Link DC tie with the broader power system.
2019 Page 54 of 67 2019 Ten-Year System Outlook NON-CONFIDENTIAL
AI summary The 2019 Ten-Year System Outlook provides a long-term view of the Bulk Electric System (BES) and outlines key considerations for the future of electricity generation, transmission, and distribution in Nova Scotia.
1 The final report summarizing the Phase 2 findings and recommendations of the A-10 2 Working group entitled Classification of Bulk Power System Elements, Document A-10 3 review Phase 2 – Final Report, was submitted to TFCP on November 30,...
AI summary The document outlines the submission of a final report from the A-10 Working Group on the classification of Bulk Power System (BPS) elements, the methodology for classifying BPS buses, and the ongoing applicability of Directory 4 for BPS protection. It also discusses NS Power’s transmission maintenance program aimed at extending asset life and ensuring reliability.
1 • Visual inspection of every line once per year via helicopter, or via ground patrol 2 in locations not practical for helicopter patrols. 3 • Foot patrol of each non-BPS (Bulk Power System) line on a three year cycle. 4 Where a Lidar sur...
AI summary The text outlines inspection protocols for power lines, including annual helicopter or ground patrols, three-year foot patrols for non-BPS lines, and biennial Lidar surveys for BPS lines. It also discusses the transmission project approval process, emphasizing the need for system reliability, compliance with standards, and potential changes due to technical studies or regulatory approvals.
1 reliability. The MATPC forms the core resource for coordinating input to studies 2 conducted by each member organization and presenting study results, such as evaluation 3 of transmission congestion levels in regards to the total transfe...
AI summary The text discusses the role of the MATPC in transmission planning and the impact of new large load customer interconnection requests due to the legalization of cannabis in Nova Scotia. It also references a directive from the NS-UARB for NS Power to conduct a wind integration stability study.
“Establish requirements to allow increased levels of wind on the NSPI system. 27 Two threshold criteria to allow increased levels of cost-effective wind resources 28 are completion of a second 345 kV intertie to New Brunswick, and assessme...
AI summary The document outlines requirements for increasing wind energy integration on the NSPI system, including the need for a second 345 kV intertie to New Brunswick and technical improvements. NS Power is conducting a wind integration stability study with Power Systems Consultants, with results expected in mid-2019 as part of the pre-IRP deliverables.
1 9.0 TRANSMISSION DEVELOPMENT 2019 TO 2029 2 3 9.1 Impact of Proposed Load Facilities 4 5 As noted in Section 8.5 of this report, there are a number of system upgrades that may be 6 required to serve new cannabis facilities that are being...
AI summary The text discusses the impact of proposed cannabis facility load upgrades on Nova Scotia's transmission system, outlining specific substation and transformer upgrades needed by 2019/2020. It also outlines 2019 transmission development plans, including an uprating of the 2C Port Hastings 138kV substation to meet NPCC BPS standards.
1 are not connected to BES buses and the Transmission Owner has not been 2 identified them as BES buses requiring sequence-of-events and fault recording 3 capabilities. 4 5 3. At 1N Onslow and 103H Lakeside there are deficiencies in the mo...
AI summary The text discusses deficiencies in monitoring capabilities at specific substations and updates regarding the correct location of a site mentioned in a prior report. It also outlines a study initiated in 2017 to address transmission line capacity, clearance, and age issues in the Western Valley over a 15-year planning horizon.
re being developed to study specific DR programs. 27 28 The outcome of this IRP process will impact and inform all future Ten-year System Outlook 29 Reports and related long term planning processes. The Company expects the IRP will provide...
AI summary The 2019 Ten-Year System Outlook discusses the impact of the Integrated Resource Plan (IRP) on future planning processes, including the need to address potential capacity deficits and the role of transmission planning, particularly in relation to new load facilities and the Maritime Link.
N-92020 Integrated Resource Plan
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reliability and rate stability. This is not new thinking for the utility. When natural gas first became available in Nova Scotia in 1999, Nova Scotia Power converted the three units at the Tufts Cove Generating Station to utilize this newl...
AI summary Nova Scotia Power has historically transitioned to natural gas and wind energy, reducing emissions. Recent infrastructure, including interconnections with New Brunswick and the Maritime Link HVDC project, enhances grid reliability and supports long-term rate stability through access to zero-carbon electricity.
n emissions by 2050 - Accelerated Net Zero: Coal plants retired no later than 2030. GHG reduction trajectory consistent with reaching net-zero carbon emissions by 2045 - Low Electrification: Current pace of growth in building and transport...
AI summary The document outlines multiple scenarios for achieving net-zero emissions by 2045, including accelerated coal plant retirements, varying electrification levels (Low, Mid, High), and regional integration options. It emphasizes stakeholder-informed sensitivity analyses to ensure robust findings.
the change in greenhouse gas emissions, coal generation, and low-carbon generation over time across scenarios. Figure 7. Transformation of Generation Mix Across Scenarios The IRP analysis demonstrates that wind is the lowest-cost domestic...
AI summary The IRP analysis highlights wind as the preferred renewable energy source due to lower costs and higher capacity factors, with solar playing a limited role. Regional integration, including grid interconnections, is identified as critical for economic and system reliability under low-emission scenarios.
1.9.1 Action Plan The Action Plan includes insights and ranges informed by the model outputs and findings, as analyzed across the scenarios. These will continue to be reviewed and updated, and should be understood in terms of their orders...
AI summary The Action Plan outlines a Regional Integration Strategy to enhance Nova Scotia's energy reliability and access to low carbon energy, including the development of a Reliability Tie and Regional Interconnection. Electrification is highlighted as a key variable in the Integrated Resource Plan, supporting provincial decarbonization goals.
3.1.3.2 Synchronous Inertia Inertial Response is a key property of a power system which helps to ensure reliability. It is the ability of synchronous generators to release kinetic energy stored in their rotating generators in response to a...
AI summary This section discusses the importance of synchronous inertia in maintaining grid reliability, the impact of replacing coal-fired generators with inverter-based and gas turbine generators, and Nova Scotia Power's approach to ensuring sufficient inertia through system modeling and studies. The pre-IRP study recommended minimum inertia levels and the use of various sources to meet these requirements.
4.5.1 Existing Transmission Interconnections Nova Scotia Power has two existing interconnections to neighboring regions: the Maritime Link connecting Nova Scotia to Newfoundland, and an existing AC interface connecting Nova Scotia to New B...
AI summary Nova Scotia Power has two existing transmission interconnections: the Maritime Link to Newfoundland and an AC interface to New Brunswick. These interconnections are included in the Integrated Resource Plan (IRP) model. The Maritime Link provides access to energy and capacity resources, while the AC interface has limited firm import capacity due to reliability and transmission constraints.
4.5.2 Transmission Expansion Options This IRP explored two transmission expansion options as part of the suite of integrated resources available to the model. The first is the development of a Reliability Tie, which allows for the integrat...
AI summary The Integrated Resource Plan (IRP) evaluated two transmission expansion options: a Reliability Tie and a Regional Interconnection. The Reliability Tie provides system inertia and integrates renewable generation, while the Regional Interconnection offers access to firm capacity and energy in addition to reliability benefits.
4.5.2.1 Reliability Tie The Reliability Tie comprises development of a new 345 kV AC line between Onslow, Nova Scotia and Salisbury, New Brunswick. This transmission option was an available resource in all the key scenarios. During the Pre...
AI summary The Reliability Tie involves constructing a new 345 kV AC line between Onslow, Nova Scotia, and Salisbury, New Brunswick. It was identified as a critical resource for system stability and enabling the integration of up to 400 MW of additional wind capacity. Alternative solutions, such as synchronous condensers and battery storage, were also considered.
4.5.2.2 Regional Integration In addition to the available Reliability Tie, the Regional Integration scenarios add two additional candidate transmission expansion options: 1) an HVDC line connecting Salisbury, New Brunswick to Quebec, and 2...
AI summary The document discusses two regional integration transmission expansion options: an HVDC line connecting Salisbury, New Brunswick to Quebec, and a 345 kV AC line from Salisbury to Coleson Cove, New Brunswick. These options provide access to ISO New England power markets and are modeled as flexible resources available starting in 2026.
4.5.3 Characteristics of Imported Energy and Capacity As discussed in the previous sections, both existing and candidate transmission options can provide energy, and in some cases firm capacity.52 Depending on the import source and availab...
AI summary The section discusses the characteristics of imported energy and capacity, including emission considerations and modeling assumptions for different transmission options. It highlights how imports from various sources are treated in terms of emissions and capacity contributions, with firm and non-firm imports categorized differently.
Firm Import Options: - • Access to firm capacity via existing transmission up to ~150 MW firm; and/or, - • Access to firm capacity via new transmission build up to ~450 MW firm
AI summary The document outlines two options for accessing firm import capacity: utilizing existing transmission up to 150 MW or building new transmission to access up to 450 MW of firm capacity.
Non-Firm Import Options: - • Import energy via existing transmission (Maritime Link and New Brunswick tie-line); and/or, - • Import energy via new transmission (either HVDC to HQ, or AC to link to Coleson Cove/ISO-NE). 52 Firm transmission...
AI summary The document discusses non-firm import options for energy, including existing and new transmission methods, and explains the difference between firm and non-firm transmission capacity, noting that non-firm capacity may be curtailed and requires additional reserve requirements.
w these caps, particularly in the intermediate years of the planning horizon, as the generation mix transitions away from carbon-intensive sources and coal units retire. Decarbonizing Nova Scotia Power's electricity supply will require inv...
AI summary Decarbonizing Nova Scotia Power's electricity supply requires investment in diverse, low-emission resources. Regional integration, such as the Reliability Tie and a larger Regional Interconnection, is shown to be economically beneficial in the Integrated Resource Plan (IRP) analysis, reducing costs compared to current and distributed resource scenarios.
7.2 Action Plan As set out in the IRP Terms of Reference, The IRP Action Plan describes the key tasks to be undertaken in the next five years to implement the long-term electricity strategy. These Action Plan items are built on the items i...
AI summary The IRP Action Plan outlines steps for developing a regional integration strategy to enhance reliability and access to low-carbon energy, and proposes an electrification strategy to support decarbonization while maintaining rate stability. Key actions include developing a reliability tie and regional interconnection, conducting studies on firm import options, and initiating electrification programs with oversight from UARB.
N-9-(i)Appendices A-N
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NAL ASSUMPTIONS SET 69 Nova Scotia Power IRP Final Report Appendix B Page 71 of 112 2020 IRP: IMPORTS MARCH 11, 2020 2020 IRP FINAL ASSUMPTIONS SET 70 Nova Scotia Power IRP Final Report Appendix B Page 72 of 112 SUMMARY – IMPORTS • Firm im...
AI summary The 2020 Integrated Resource Plan (IRP) outlines assumptions regarding imports, including firm and non-firm transmission options. Firm imports could support lower GHG emissions and replace coal-fired generation, requiring firm transmission via existing or new infrastructure. Non-firm imports can use existing or new transmission but may be subject to curtailment.
up to ~450 MW. Non-Firm Import Options: • Import energy via existing transmission (Maritime Link and New Brunswick tieline); and/or • Import energy via new transmission. 2020 IRP FINAL ASSUMPTIONS SET 72 Nova Scotia Power IRP Final Report...
AI summary The document discusses enabling transmission investment, outlining qualitative and quantitative benefits, including enhanced system reliability, renewable integration, and economic energy imports. It also provides cost estimates for new transmission projects, such as the 345kV Onslow-Salisbury-Coleson Cove and the HVDC to QC line.
Onslow-Salisbury-Coleson Cove $600M 700 345kV Onslow-Salisbury ; HVDC to QC 2 $1.7B 1000 • Assumptions presented here would be subject to additional feasibility study if selected during the IRP modeling. • The transmission costs above are...
AI summary The text outlines transmission project costs, assumptions for the Integrated Resource Plan (IRP), and pricing for firm imports, including capacity and energy provision based on Platts Analytics forecasts and emissions accounting standards. The projects are subject to feasibility studies and cost-sharing opportunities.
Scotia Power IRP Final Report Appendix H Page 17 of 321 SMALL HYDRO • The sustaining capital forecast for hydro assets are based on Q1 2020 Forecast (an update of the Hydro Asset Study). 2020 IRP ASSUMPTIONS SET 96 Nova Scotia Power IRP Fi...
AI summary The document discusses interconnection costs for new generation and storage resources in the context of Nova Scotia Power's Integrated Resource Plan (IRP). It highlights that these costs can vary significantly based on location and that the IRP provides directional insight rather than specific project decisions.
m. Non-Firm Import Options: • Import energy via existing transmission (Maritime Link and New Brunswick tie-line); and/or, • Import energy via new transmission per above. 2020 IRP ASSUMPTIONS SET 68 ENABLING TRANSMISSION Nova Scotia Power I...
AI summary The document outlines non-firm import options for energy, including existing and new transmission lines, and discusses the benefits of transmission investment, such as enhanced reliability and renewable integration. It also covers pricing assumptions for firm imports based on Platts Analytics forecasts, emphasizing clean energy sources.
Nova Scotia Power IRP Final Report Appendix H Page 133 of 321 Input on Draft Assumptions Set Page 9 of 10 • What consideration, if any, is given to weather trends in the long-term weather dataset? For example, if there is a trend towards m...
AI summary The text raises questions about the consideration of weather trends in long-term forecasts, the correlation between weather and generation efficiency, and the modeling of import-related issues, including transmission costs, new tie lines, and the impact of fossil fuel imports on emissions and costs.
ution system where only the utility has been allowed to do so, but the flicker and effects on voltage profiles on the feeders may ultimately lead to distributed voltage or reactive power flow control. We are concerned as well, that as the...
AI summary The submission expresses concern that the utility may not prioritize upgrades to valley transmission lines, which could hinder the integration of renewable energy technologies. It emphasizes the need for the utility to demonstrate a commitment to supporting renewable energy development in the region.
Article history: Digby, Nova Scotia, is a largely rural area with a wealth of renewable energy resources, principally wind Received 23 August 2015 and tidal. Digby’s electrical load is serviced by an aging 69 kV transmission line that ofte...
AI summary This study explores the potential of smart charging of electric vehicles in Digby, Nova Scotia, to increase export capacity on an aging transmission line and utilize renewable energy. With 10% EV adoption, time-of-day charging increased renewable energy usage by 20%, while smart charging increased it by 73% and added 3 MW of load during transmission constraints.
1. Introduction and collect from small hydroelectric facilities inland. In 2010 a 30 MW wind energy converter (WEC) field, consisting of twenty The Municipality of Digby (Fig. 1, left) is embarking on an ambi- GE 1.5 MW units, was commissi...
AI summary The Municipality of Digby is pursuing a strategy to increase the use of locally produced renewable energy. Transportation is a major energy consumer in Nova Scotia, relying on imported fuels. Digby has significant renewable resources, particularly wind and tidal, but faces transmission constraints that limit further renewable development without upgrades, curtailment, or local load additions.
In this section, the interactions and influence of EVs on the elec- To illustrate the impacts of the three charging scenarios on the tric grid are discussed, with a focus on how they would relate to electricity grid we examine the first we...
AI summary This section discusses the impact of electric vehicles (EVs) on the electricity grid in Digby, focusing on renewable electricity generation and transmission line L-5533. It examines load and generation data from 2012 to 2014, highlighting concerns about transmission constraints during periods of high export.
100 Probability of Digby exporting Jan-Feb address the grid constraint on Transmission L-5533, their influence Mar-Apr is directly applied to L-5533 power to create a modified load time- 80 May-Jun series in Fig. 12. electricity (%)
AI summary The text discusses the probability of Digby exporting electricity, referencing a grid constraint on Transmission L-5533 and the modification of load time-series data to address this constraint.
ccelerating the Coal Phase Out: Nova Scotia and the Climate Emergency A technical report and modelling analysis of a low-carbon transition for Nova Scotia’s electricity and energy systems by 2030’ The report offers a low-carbon scenario ba...
AI summary This report outlines a low-carbon transition for Nova Scotia's electricity and energy systems by 2030, focusing on a complete phase-out of coal. It includes a 7% drop in electricity demand, increased energy efficiency, the addition of renewable energy sources, and the integration of energy storage and transmission upgrades.
encyOne assumes that significantly 26 different scenarios such as this one will produce a broad range of transmission and 27 distribution costs which should be considered in the overall cost of each study. 28 9 Gellings, Clark, Evolving pr...
AI summary The text discusses the impact of different scenarios on transmission and distribution costs, referencing studies on demand-side management and reliability. It also mentions Nova Scotia Power's Integrated Resource Planning (IRP) report and a related proceeding.
10. Imports CA Reflect correlation of temperature & load (NL, NS & NB) This type of granularity is not included in NS Power’s long (Chernick & and availability /cost of imports. term planning model. Wilson) 10. Imports CA Potential cost of...
AI summary The text discusses the impact of imports on Nova Scotia Power's planning model, including the correlation of temperature and load, potential costs of new transmission, the significance of an 800 MW tie line, and the assumption that imports may underestimate emissions from New Brunswick. Reliability and operability screening is also mentioned as part of the process.
Category Participant Assumption Comment NS Power Response 15. Natural Treatment of interconnectors critical. NS Power agrees that additional transmission Interconnection Forces Firm imports could support transition to lower GHG interconnec...
AI summary The text discusses concerns regarding interconnection and transmission and distribution (T&D) systems, including the impact of interconnectors on renewable energy integration and the limitations of the Integrated Resource Plan (IRP) in considering substation-level capacity. NS Power acknowledges the importance of interconnections and has included additional assumptions to support renewable integration.
2042 2043 2044 2045 2 0 2 0 I R P I N T E R I M M O D E L I N G U P D AT E 15 Nova Scotia Power IRP Final Report Appendix I Page 18 of 44 T&D AVOIDED COST METHODOLOGY UPDATE NS Power’s T&D Avoided Cost methodology will be reviewed during t...
AI summary Nova Scotia Power's Transmission and Distribution Avoided Cost methodology is set to be reviewed during the 2020 Integrated Resource Plan process, indicating a potential update to how avoided costs are calculated in the context of transmission and distribution planning.
D E L I N G U P D AT E 16 Nova Scotia Power IRP Final Report Appendix I Page 19 of 44 T&D AVOIDED COST METHODOLOGY UPDATE CONSIDERATIONS • There is no universally accepted methodology for calculating Avoided T&D Costs • A methodology which...
AI summary The document discusses considerations for updating the methodology to calculate Avoided T&D Costs, including the use of load growth forecasts and the potential for deferring investments through Demand Side Management. The revision is to be completed by Sept. 15, 2020.
ry Nova Scotia Power IRP Final Report Appendix J Page 34 of 245 Comparator, Low Elec./Base DSM, Regional Integration Key Observations Metric 2035 2045 Model selects firm imports when available; ~600 MW of GHG Emissions (MMT) 3.7 1.0 tran...
AI summary The document discusses the impact of new transmission lines on GHG emissions and energy costs in Nova Scotia. It highlights that the model selects firm imports when available, leading to a reduction in GHG emissions by 2045. Additionally, new transmission lines enable higher wind capacity integration and reduce annual GHG emissions to 1 MMT.
Nova Scotia Power IRP Final Report Appendix J Page 70 of 245 3.1B MID ELEC. / BASE DSM / ACCEL. ZERO 2045 / DISTRIBUTED RESOURCES $MM Scenario Notes 25-yr NPVRR $12,575 • Reliability Tie build in 2034 enabled wind integration • Regional In...
AI summary The document presents financial and planning scenarios related to Nova Scotia Power's Integrated Resource Plan (IRP), including 25-year and 10-year Net Present Value of Revenue Requirement (NPVRR) figures, and notes on infrastructure projects such as a Reliability Tie and Regional Interconnection to support wind integration and firm imports.
ing scenarios appropriately examine these questions to provide the Board with the context it needs to evaluate the need for and potential scheduling of the reliability tie. DSM impacts – There are two case pairs that contrast base and mid...
AI summary The text discusses discrepancies in the NPVRR differences between base and mid DSM scenarios, questioning why the incremental costs are higher than the supply resources they replace and whether avoided T&D costs could offset these differences. It also raises concerns about the model's counter-intuitive changes and the timing of the reliability tie construction.
of 245 Nova Scotia IRP Review a stabilizing and economic plant like Wreck Cove (or if Wreck Cove was not available, some thermal capacity) was not committed. Case 2: The contingency evaluated was the loss of 1 of 2 poles of Maritime HVDC l...
AI summary The document evaluates different contingency cases in the Nova Scotia Integrated Resource Plan (IRP), focusing on the impact of losing capacity from the Maritime HVDC link and the implications of high imports from New Brunswick during high wind events. It questions the validity of selected cases and suggests operational strategies that prioritize local generation.
d to indicate if additional checks were performed to try to confirm that the result was indeed due to an infeasible operating condition. Therefore it is difficult to draw a defendable conclusion here. Case 4: Additional wind was added by b...
AI summary The text discusses issues with a case involving the addition of wind power and the tripping of AC ties, leading to load-shedding stages. It highlights concerns about the contingency being an N-2 event and the lack of defined acceptable load shedding levels. The analysis of a system with an additional 345kV line is noted as not being thoroughly scrutinized due to unresolved questions in the base case.
hen the units are more likely to be called upon. Availability of fuel supply has decreased following the closure of local refineries. Reliability issues associated with maintaining units out to their 2 Page 16 – IRP Modeling Results Worksh...
AI summary The text discusses the impact of aging power generation units and decreased fuel supply on reliability, as well as the potential increase in peak load due to electrification and its implications for transmission and distribution costs. Heritage Gas notes that these issues were not previously considered in Integrated Resource Plans.
• Provide information regarding whether the battery+ synchronous condenser option for system inertia would also provide system capacity. b. Reliability Tie and Regional Integration -Treatment of risk: The Reliability Tie and Regional inter...
AI summary The text addresses questions regarding the system inertia provided by a battery+synchronous condenser option, the risks and studies required for reliability tie and regional integration, and the inclusion of offshore wind in the renewable resource portfolio. It emphasizes the need for cost-benefit analysis and planning flexibility.
Reliability Tie SBA-02 Treatment of risk: The Reliability Tie and Regional The Reliability Tie and Regional Interconnection and Regional interconnection are significant components of the initial options have been selected in multiple plans...
AI summary The document discusses the importance of evaluating risks and costs associated with the Reliability Tie and Regional Integration projects. It emphasizes the need for additional studies and cost comparisons if these projects are selected, ensuring that alternatives are considered and that decisions are made based on a balanced assessment of cost and risk.
The Reliability Tie is the term used in the 2020 IRP for a 2nd 345kV AC Transmission Line between Onslow, NS and Salisbury, NB I R P D R A F T F I N D I N G S , R O A D M A P, & A C T I O N P L A N 10 Nova Scotia Power IRP Final Report App...
AI summary The document discusses the Reliability Tie, a second 345kV AC transmission line between Onslow, NS and Salisbury, NB, as outlined in the 2020 Integrated Resource Plan (IRP). It also includes resource portfolio comparisons and changes for 2026 and 2045, focusing on MW capacity and transmission planning.
acity drops in 2045, identify the resources the model substitutes for battery capacity, and discuss implications of late- model treatment of battery storage in the end effects calculation. Transmission and system inertia The modeling raise...
AI summary The document raises concerns about the modeling of battery storage and system inertia in the Integrated Resource Plan (IRP), noting inconsistencies in how battery capacity and inertia impact the timing of the reliability intertie and regional integration. It also highlights sensitivity of the model to small changes in battery costs.
optimize a transition to a more adaptive resource mix, and that some of these interactions might be enabling higher retirements of “slow inertia” units. This concept is consistent with the model output from 2.1C.IMPORT-3: with the reliabil...
AI summary The document discusses the impact of the reliability intertie on inertia, unit retirement, and resource mix, including questions about inertia contributions from steam units, the role of the reliability intertie in enabling imports, and the implications for future resource planning and RFP processes.
also notes that an increase of this size in natural gas consumption in the region requires long-term natural gas transportation commitment planning, which should also be reflected in the Action Plan. Electrification and Associated Transmis...
AI summary The text discusses the need for long-term natural gas transportation planning due to increased consumption, significant investments in transmission and distribution infrastructure driven by electrification and environmental targets, and the role of natural gas in supporting the transition to low carbon fuels. It also references ongoing DSM Matter No. M09471 regarding avoided T&D costs.
The Action Plan and Roadmap should specifically identify hydrogen as a means to assist the province in meeting the GHG reduction targets established in the SDGA. General Comments The assumptions and scenario modelling used in this IRP re...
AI summary The document highlights the need to identify hydrogen in the Action Plan and Roadmap to meet GHG reduction targets. It also discusses significant changes in the future electric sector in Nova Scotia, including the separation of capacity from energy, increased reliance on imports, and the need for new transmission and fast-acting generation.
options, and a service life of 50+ years that give it unique advantages over batteries and makes it the ideal storage solution for integrating Nova Scotia’s considerable wind resources into the grid. It is also important to note that since...
AI summary The text promotes A-CAES (Advanced Compressed Air Energy Storage) as a viable energy storage solution for Nova Scotia, highlighting its advantages over batteries, its ability to provide grid inertia, and its potential to reduce costs by avoiding new transmission infrastructure. It notes that A-CAES has been successfully proposed in other regions and that Hydrostor has studied Nova Scotia’s geology as suitable for A-CAES.
(21) Planning for transmission should proceed in parallel to an all-source RFP. Cost estimates for completion of the reliability tie for different in-service dates (several options, covering the range from the earliest feasible date to 203...
AI summary The document discusses the planning of transmission projects in parallel with all-source RFPs, emphasizing the need for cost estimates across various in-service dates. It also highlights a trade-off between imported power and battery resources, noting that the absence of a reliability tie may lead to higher procurement of batteries and synchronous condensers.
hronous inertia in the IRP modeling assumptions; batteries as modeled are not an alternative source of inertia. RII recommends that planning for potential transmission projects proceed. NS Power believes it is generally appropriate that th...
AI summary The document discusses the modeling assumptions related to synchronous inertia in the Integrated Resource Plan (IRP) and notes that batteries do not provide an alternative source of inertia. NS Power supports the recommendation for transmission planning and aligns with the advancement of the Reliability Tie for low-cost wind projects.
in Nova Scotia. These fundamental changes include for the first time a general future separation of capacity from energy, a potential focus on electricity growth versus NS Power has identified as an Action Plan item the development of a Re...
AI summary The document outlines fundamental changes in Nova Scotia's energy landscape, including the separation of capacity from energy, increased focus on electricity growth, development of a Regional Integration Strategy following the Integrated Resource Plan (IRP), and the need for significant regional transmission and fast-acting generation to support renewable development and peak response.
nt services on certain generators (e.g. wind) are found to reduce the synchronous inertia constraint, the resources to address these needs (conventional generators, the Reliability Tie, Maritime economics of building more variable renewabl...
AI summary The document discusses the need to address reliability challenges due to reduced synchronous inertia from wind generators, suggesting solutions such as conventional generators, the Reliability Tie, and load resources. NS Power is committed to studying these issues and has incorporated these considerations into its Integrated Resource Plan (IRP) Action Plan. Coordination with New Brunswick and supply availability are emphasized for the Reliability Tie and Regional Integration.
important concerns, we have gained a better understanding of NS Power’s current thinking and we hope that an improved articulation of our concerns will convince NS Power to adopt our recommendations. Summary of RII Recommendations 1. Short...
AI summary The document outlines recommendations for NS Power's Integrated Resource Plan (IRP), including an aggressive near-term RFP for up to 700 MW of wind by 2025, parallel transmission planning, and incorporating updated data into capital applications for hydroelectric redevelopment.
in the near term, it should be included in the all-source procurement process because successful battery storage bids could influence the relative value of other bids, including the reliability link. Transmission and wind integration plann...
AI summary The text discusses the need for NS Power to integrate battery storage and transmission planning with wind integration studies and all-source RFPs. It highlights the importance of evaluating various wind integration strategies, including the Reliability Tie, fast frequency response, and battery storage, to optimize grid investments and reliability.
Nova Scotia Power IRP Final Report Appendix L Page 13 of 125 Comments on Draft IRP Report Page 8 of 21 pace…” 13 Exploration of options other than transmission connections may reveal that NS Power can retire steam plants sooner and acquire...
AI summary The text discusses the potential benefits of the Reliability Tie and the Regional Interconnection projects, including reduced reliance on steam plants, increased wind integration, and cost savings. It suggests exploring these options further and adjusting planning timelines and cost estimates to account for sensitivity and uncertainty.
Nova Scotia Power IRP Final Report Appendix L Page 17 of 125 Comments on Draft IRP Report Page 12 of 21 on the T&D system,” much more is needed over the near term. One significant shortcoming of this IRP analysis is that it lacked a meanin...
AI summary The text highlights the need for Nova Scotia Power to improve its Integrated Resource Plan (IRP) by incorporating better estimates of transmission and distribution (T&D) costs related to electrification. It emphasizes the importance of aligning T&D planning with demand-side management (DSM) programs to optimize cost management and planning.
on, given the urgency of climate action. Moreover, since electricity sector-specific targets are not yet fully developed in the SDGA, it weakens the confidence that these scenarios are SDGA compliant. While retiring coal earlier would prov...
AI summary The text emphasizes the urgency of climate action and the need for the electricity sector to align with provincial climate goals. It highlights the importance of retiring coal and transitioning to clean energy, while noting the risks of relying on natural gas beyond 2050. Regional interconnection and enhanced transmission upgrades are seen as critical for a low-cost, rapid clean energy transition.
$50 per tonne (2022 federal backstop) form a reasonable range for consideration. Nova Scotia Power IRP Final Report Appendix L Page 42 of 125 The qualitative reporting of DSM’s effects within the IRP Report is appreciated, acknowledging th...
AI summary The document discusses the qualitative reporting of DSM effects in the IRP, noting that higher DSM programs lead to earlier coal retirement and lower emissions. It also raises concerns about the lack of T&D effects in the IRP, arguing that this ignores established benefits of DSM and values them at zero.
s (T&D costs are assumed to be invariant between cases). To have DSM compete in a “generation-focused” IRP effectively means that established T&D benefits of DSM are being ignored, and valued at zero. The assessment that both T&D avoided c...
AI summary The text argues that demand-side management (DSM) should not be evaluated solely in a 'generation-focused' Integrated Resource Plan (IRP), as it ignores the Transmission and Distribution (T&D) benefits of DSM. The text highlights that T&D avoided costs should be considered in the Net Present Value of Renewable Resources with Energy Efficiency (NPVRR w/EE) calculations, and provides data showing the impact of these avoided costs across different DSM scenarios.
n the electrical grid and regional interconnections associated with increased electrification needs to be considered with respect to energy security and reliability for the province. General Comments Heritage Gas notes that NSPI distribute...
AI summary Heritage Gas comments on the need for a rigorous timeline for a T&D study to understand the full costs of electrification and the reliability of aging infrastructure, as part of NSPI's Integrated Resource Plan. They emphasize the importance of this study for informing future investments in regional interconnection and transmission by 2030.
Wind Consumer Plan for potential transmission projects in parallel to NS Power will continue transmission planning (for both integration Advocate (1b) both additional study of wind integration as well as the the Reliability Tie and Regiona...
AI summary NS Power is planning transmission projects in parallel with wind integration studies and the recommended all-source RFP. This includes evaluating strategies such as an early in-service date for the Reliability Tie and implementing operating practices to ensure system reliability.
We encourage NS Power to acknowledge that province-wide benefits (such as reducing the carbon reduction pressure in other sectors) exist with electrification, to avoid creating the impression that rates should be a singular basis for decid...
AI summary The text encourages NS Power to recognize province-wide benefits of electrification, such as reducing carbon reduction pressure in other sectors, and emphasizes the need to update T&D cost forecasts and planning reserve margin findings in the IRP to support informed program investment decisions.
Category Participant Comment NS Power Response Electrification Consumer Adopt a definition of electrification and principles for NS Power has adjusted IRP Action Plan Item 2a to specify Advocate (3a) maximizing its benefits as developed by...
AI summary The text discusses consumer advocate comments on electrification, transmission and distribution (T&D) costs, and hydro model performance. NS Power responds by adjusting its Integrated Resource Plan (IRP) to incorporate best practices and industry analyses, as well as incorporating T&D avoided costs into its IRP Final Report.
Category Participant Comment NS Power Response required to confirm and/or expand the conclusions from the PSC Study, given the limited number of cases studied. Wind / PSC CanREA In the PSC Study the loss of the New Brunswick intertie NS Po...
AI summary CanREA suggests that reducing imports over the NB intertie may be more effective than reducing wind generation during high import levels, as imports have higher incremental costs and could provide grid services. NS Power agrees but notes that pre-curtailment of imports may not be economic due to the significant quantities of non-firm imports being dispatched.
y the end of the planning horizon. The model such as the Atlantic Loop presented in the Speech from was offered up to 615 MW of new firm import capacity, the Throne and the $10 billion Canada Infrastructure which was economically selected...
AI summary The text discusses the importance of enhanced transmission connections and upgrades for a clean transition, citing the Atlantic Loop and Maritime Link projects. It notes that current plans fall short of 'optimal' due to limited regional integration opportunities and highlights the need for further analysis on potential firm capacity imports.
2a. Regional Integration (i.e. investment in stronger AREA No comment n/a interconnections to other jurisdictions) is an economic CA Supportive of additional steps to be taken to consider 2020-11-16, 6/21, 8/21 component of the least-cost...
AI summary The text discusses the economic value of regional integration through interconnections and grid investments, such as the Reliability Tie and Regional Interconnection, as part of least-cost planning. It recommends that NS Power commit to planning for potential transmission projects alongside wind integration studies and an all-source RFP.
FINDING STAKEHOLDER STAKEHOLDER COMMENT REFERENCE ratepayers, and draft findings statement 2 echo the same. At the same time, the Reliability Tie is a welcome move, which would strengthen the province’s grid further. However, it is not sho...
AI summary The stakeholder comments highlight the importance of the Reliability Tie in strengthening the province’s grid and transitioning off coal. They also mention the need for fully replacing coal generation with interconnection infrastructure and clean firm imports, emphasizing the role of wind energy and the potential of regional interconnection projects like the Atlantic Loop.
covery strategy to Item 3d: ‘[recommends] action plan should commit to better align depreciation with updated useful lives for planning for potential transmission projects in parallel generation assets. Invest sustaining capital into to bo...
AI summary The text discusses recommendations for aligning depreciation with updated useful lives for generation assets, investing in capital for thermal units, and developing plans for replacing natural gas-powered steam turbines. It also mentions the need for parallel planning on transmission projects and wind integration studies.
Request / Directive Originator Status NS Power Comments Per IRP and GUO letter from NSUARB about pre-IRP NSUARB Complete As part of its pre-IRP deliverables, Nova Scotia deliverables: Power engaged PSC to complete a Renewables 5. Establish...
AI summary Nova Scotia Power was directed by the NSUARB to establish requirements for increasing wind energy on the NSPI system, with specific criteria including a second 345 kV intertie to New Brunswick and an assessment of the provincial transmission system. The work involved a stability study and modeling of system stability requirements.