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Underfrequency Load Shedding Report

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Presentation on theme: "Underfrequency Load Shedding Report"— Presentation transcript:

1 Underfrequency Load Shedding Report
Jerry Rust WECC October 21, 2010

2 NERC PRC WECC Consolidated Coordinated Plan Recommendations

3 Automatic Underfrequency Load Shedding – WECC Focus
Preserve the existing WECC Consolidated Coordinated Plan - Variance Applicable to Correct Entity UFLS entities – responsible for the ownership, operation, or control of UFLS equipment (WECC-0065 Criterion)

4 Automatic Underfrequency Load Shedding – WECC Focus
WECC Consolidated Coordinated UFLS Plan 13-page document posted for 30 days September 22, – closes October 22, 2010 Response to comments due back November 21, 2010 Is it complete? Did we miss something or miss-quote something?

5 Automatic Underfrequency Load Shedding – WECC Focus
Some issues within the approved standard may cause WECC OC and PCC to re-think implementation M.E.B.12. Each Planning Coordinator shall have dated evidence such as reports, data gathered from an historical event, or other dated documentation to show that it participated in a UFLS design assessment per Requirements E.B.12 and E.B.4 if UFLS program deficiencies are identified in E.B.11

6 Automatic Underfrequency Load Shedding – WECC Focus
E.B.11 Each Planning Coordinator in whose area a BES islanding event results in system frequency excursions below the initializing set points of the UFLS program, shall participate in and document a coordinated event assessment with all affected Planning Coordinators to conduct and document an assessment of the event within one year of event actuation to evaluate: E.B The performance of the UFLS equipment E.B The effectiveness of the UFLS program

7 Automatic Underfrequency Load Shedding – WECC Focus
So what does this mean Compare to the simulations that established the plan and determine if the actual event did not match the simulations – why? What is wrong? What changed? Etc. Does WECC have the simulation model that establish the plan – in the past an ad-hoc group does the simulation analysis. It is maintained and updated? Is it an operating case with reflection of reserve?

8 Automatic Underfrequency Load Shedding – Recommendation
WECC form a permanent group to maintain the simulation model and to be able to run a comparison analysis in the event it needs to be done. (maintain some kind of continuity of personnel) Reports to the JGC Event Analysis has been under OC in the past

9 Automatic Underfrequency Load Shedding – Implementation
Effective one year following the first day of the first calendar quarter after applicable regulatory approvals. January 1, 2011 anticipated date Finish WECC-0065 Address where and whom to maintain simulation

10 Questions

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