Topic:"Electricity Generation" in M11307

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.

Table 1. Modeling Scenario NPVRR Metrics Scenario Info, All Scenarios NZ 2035 Current Policy and TrendsAtlantic Loop Modified-mid DSM CE1-E1-R1 MMDSM 20 $ 3,210 20% 14 $ 3,160 14% 18 $ 1,250 5% NZ 2035 Current Policy and TrendsAtlantic Loo...

AI summary The table presents NPVRR metrics for various modeling scenarios under different policy conditions, including modified DSM, high DER, and adjusted timing scenarios, showing variations in costs and percentages across different years and assumptions.

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 correctly identifying capacity needs for Integrated Resource Plan (IRP) runs and the need to evaluate energy storage options for meeting peak demands. It also highlights the potential changes in customer behavior due to decarbonization policies and the financial condition of Eastward Energy. Additionally, concerns are raised about the assumptions behind the Atlantic Loop bidirectional flow sensitivity run.

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.

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.

7.1.3 EMT Model Quality IBR control systems and operating modes are evolving rapidly and have the potential to strengthen the grid and support a 100% renewable energy dispatch in Nova Scotia. Detailed analysis of options may provide more t...

AI summary The document emphasizes the importance of high-quality EMT models for IBR control systems to support grid reliability and renewable energy integration in Nova Scotia. Current vendor models lack robustness in large simulations and may not align with actual equipment, hindering effective analysis and solution development.

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.

3.2.1 Overview of E3's EV Load Shaping Tool To calculate electricity bills and supply costs for EV charging, E3 developed a forecast of potential EV charging loads consistent with achieving Nova Scotia's policy goals. Charging loads depend...

AI summary E3 developed an EV Load Shaping Tool to forecast EV charging loads based on Nova Scotia's policy goals. The tool models driving and charging behavior using a bottom-up approach, considering factors like vehicle type, charging access, and driving patterns. It distinguishes between unmanaged, managed, and VGI charging scenarios to calculate electricity bills and supply costs.

Recommendation 3. Support development of infrastructure "backbone" for electric vehicle charging to improve geographic coverage and fill gaps where third parties may have less incentive to invest. - Create infrastructure backbone: A robust...

AI summary The text recommends developing a robust electric vehicle charging network in Nova Scotia to address range anxiety and support EV adoption. Nova Scotia Power is encouraged to build a backbone of public chargers and invest in make-ready infrastructure in high-traffic locations to facilitate third-party investments.

ort an equitable transition through programs directly aimed at lower income or disadvantaged communities. Identify underserved communities and prioritize investments to ensure equitable access: Without intentional program design, electrifi...

AI summary The text emphasizes the need for equitable electrification by identifying underserved communities and prioritizing investments to ensure access for lower-income and disadvantaged groups. It highlights challenges such as lack of self-funding capacity and limited infrastructure, and suggests targeted initiatives like setting specific EV charging targets in disadvantaged areas.