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Project 2008.02 Undervoltage Load Shedding

Project 2008.02 Undervoltage Load Shedding. Greg Vassallo, UVLS Standard Drafting Team Chair October 24, 2013. Standard Drafting Team. Background. NERC Project 2008-02 seeks to revise the current NERC undervoltage load shedding (UVLS) standards.

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Project 2008.02 Undervoltage Load Shedding

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  1. Project 2008.02Undervoltage Load Shedding Greg Vassallo, UVLS Standard Drafting Team Chair October 24, 2013

  2. Standard Drafting Team

  3. Background • NERC Project 2008-02 seeks to revise the current NERC undervoltage load shedding (UVLS) standards. • The key catalyst for this effort is based on the following Federal Energy Regulatory Commission (FERC) directive from Order No. 693, which included the following in regard to PRC-010-0: Modify PRC-010-0 to require that an integrated and coordinated approach be included in all protection systems on the Bulk Power System, including generators and transmission lines, generators’ low voltage ride-through capabilities, and UFLS and UVLS programs.

  4. Background • In January 2010, NERC posted the Project 2008-02 UVLS Standard Authorization Request (SAR). • The SAR proposed to revise and consolidate PRC-010-0 and PRC-022-1 to add specific criteria for UVLS programs and the assessments of those programs. • Work was deferred due to prioritization for the 2011–2013 Reliability Standards Development Plan (RSDP). • A drafting team was formed this past May, and the members decided to rewrite the SAR to ensure a results-based standard that considers current issues associated with UVLS.

  5. Current Development • The revised SAR proposes that: • PRC-010-0 will include appropriate requirements from PRC-020-1, PRC-021-1, and PRC-022-1 and be revised to PRC-010-1. • PRC-010-1 will apply ONLY to those entities that have or are planning to implement distributed UVLS programs. • Requirements will ensure an integrated and coordinated approach to the design, evaluation, and reliable operation of these programs. • Applicability will be to the Transmission Planner, Planning Coordinator, Transmission Owner, and Distribution Provider.

  6. Current Development • The drafting team is working on a draft of PRC-010-1, which currently considers: • A clear definition of a distributed undervoltage load shedding program • Coordination with other protection and control systems and generator voltage ride-through capabilities • Assessments of the program to verify its continued effectiveness and coordination • Program performance analysis to ensure that the program is working as intended • Maintaining and sharing UVLS program data

  7. Project Moving Forward • Development and outreach will continue through November. • The drafting team is coordinating with the Independent Expert and EOP-003-2 Five-Year Reviews. • Documents are scheduled to be posted for the first comment and ballot period in January. • Submittal to the NERC Board of Trustees and subsequent regulatory filing is targeted for Summer 2014.

  8. Stakeholder Involvement • Early consensus-building is our top priority. • We encourage stakeholders to follow our effort, attend outreach events, and provide constructive feedback. • Please contact Erika Chanzes at Erika.Chanzes@nerc.net with any questions and to be added to the project’s email distribution list.

  9. Questions and Answers

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