VSS and Reactive Study Requirements for Co-Located Resources
Learn about VSS and Reactive Study requirements for co-located resources as outlined in the ERCOT Resource Integration Working Group. Explore the implementation of NPRR1005, clarifying the definition of POI and POIB, and the evaluation of co-located resources behind the same POI with different operating regimes to meet VSS. Discover the importance of conducting reactive studies for scenarios involving solar, energy storage, and their combination to address deficiencies and ensure compliance with VSS standards.
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Presentation Transcript
VSS & Reactive Study requirement for Co-located Resources Jenifer Fernandes ERCOT Resource Integration Working Group April 19, 2022
VSS Requirement NPRR1005-Clarifying the definition of POI and POIB was implemented on Feb 1st, 2022. Nodal Protocol 2- Point of Interconnection Bus (POIB): Electric Bus at the TSP substation that is electrically closest to the Generation Resource s POI or any electrically equivalent Electrical Bus at that station. Nodal Protocol 3.15 (4): VSS requirement is at the POIB. Reactive Study should account for the gen-tie line regardless of ownership. Part 3 Test: VSS requirement is calculated at the POIB. 2
Reactive Study: Co-located Resources behind the same POI Co-located resources with different operating regimes should evaluate each resource independently and jointly to ensure the entire plant will be able to meet VSS. E.g. Solar +Energy Storage. Reactive study should evaluate three scenarios i.e Solar, Storage and Solar + Storage. Reactive deficiencies identified in the Solar + Storage scenario must be addressed to meet VSS. Reactive losses depends on MW flow. MVAr losses are non-linear I2X. Additional shunts may be required. 3
Part 3 Tests: Co-located Resources behind the same POI Reactive Test- Each Resource (solar, storage) is tested individually to meet requirement per NOG 3.3.2.2 VSS: Each Resource independently and combined must meet VSS per NP 3.15. Solar Storage Solar + Storage AVR Test- Test three scenarios Solar Storage Solar + Storage: the combined test is to verify that the plant can control the voltage at the POIB with both Resources online. 4
Questions? Thank you!
