N-7Wind Integration Study
6 passages
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.
4.1 Existing Fault Level Assessment To understand the System Strength of the 2023 Nova Scotia grid, an "average" day dispatch was taken as the benchmark for existing SCMVA. Dispatch for benchmarking SCMVA has 3 thermal units, ML, all hydro...
AI summary The document discusses the existing fault level assessment for the 2023 Nova Scotia grid, using an 'average' day dispatch as a benchmark for SCMVA. It notes that wind generation is excluded to avoid including legacy wind's fault current contribution. The assessment is a high-level screening metric, with detailed studies planned for future grid conditions.
4.2 Minimum SCMVA for Sensitive Facilities While the above metric will be a measure of overall SCMVA and a measure of change over time, it will be necessary to monitor the minimum SCMVA for sensitive facilities such as manufacturing plants...
AI summary This section discusses the importance of monitoring the minimum SCMVA for sensitive facilities like manufacturing plants and HVDC facilities to ensure continued grid reliability. If future reductions in SCMVA are anticipated, studies will be conducted, and mitigation measures will be taken to maintain reliability.
4.4.1 Post Contingency Voltage Support To maintain post contingency voltage within the range required by NSPI, NPCC and NERC criteria, reactor and capacitor banks were added at several locations in the province. For the winter peak cases,...
AI summary To maintain post contingency voltage within required ranges, NSPI added reactor and capacitor banks at various locations in Nova Scotia. These additions were effective for many scenarios, but future load growth may necessitate dynamic reactive power support if growth exceeds current forecasts.
5.1 EMT Analysis Methodology NSPI, in collaboration with MHI, is in the process of developing the full NSPI network (including portions of neighbouring areas) in PSCADTM. The EMT model includes transmission details including 69 kV level an...
AI summary NSPI, in collaboration with MHI, is developing a detailed EMT model of the NSPI network in PSCADTM to analyze system behavior under various conditions. The model includes transmission and distribution levels and is used to study the impact of faults and IBR performance. Results are illustrative and do not reflect actual NSPI system responses.
7.2.1 Stable and Reliable Integration Recommendations to facilitate the integration of renewables on the timelines in place for Nova Scotia: - Based on study to date, there are significant concerns for the ability of the existing and futur...
AI summary The document outlines recommendations to ensure stable and reliable integration of renewable energy sources into Nova Scotia's grid. Key concerns include managing high RoCoF events, updating interconnection requirements, and addressing grid support needs as synchronous plants retire. Studies and system upgrades are recommended to mitigate risks of cascading tripping and maintain grid reliability.