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WECC Reliability Based Control Field Trial

WECC Reliability Based Control Field Trial. NERC Draft Standards BAL-007 – BAL-011. Overview. Background PWG/SDT role/responsibilities, Scope, and Time Frame BA role/responsibilities RC role/responsibilities Issues Questions. Background. Draft BAL-007 – BAL-011

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WECC Reliability Based Control Field Trial

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  1. WECCReliability Based ControlField Trial NERC Draft Standards BAL-007 – BAL-011

  2. Overview • Background • PWG/SDT role/responsibilities, Scope, and Time Frame • BA role/responsibilities • RC role/responsibilities • Issues • Questions

  3. Background • Draft BAL-007 – BAL-011 • RBC – Frequency based ACE Limit • EI Field Trial underway for 2-3 years • 14 BAs with 60% of load • “No” modifications to BA EMS’ • Waiver of CPS2 compliance requirement • Draft under review/revision with new posting in next couple of months

  4. WECC FT – Control,Scope,Time • Administered by PWG with assistance from SDT • All data will be collected, analyzed by PWG or WECC Staff, and forwarded to SDT • PWG will establish WECC interconnection specific data collection requirements • PWG will establish participation requirements, SDT will maintain list of participating BAs • PWG/SDT will review regularly review data and, if necessary, will consult with BAs on withdrawal from FT • PWG will survey BAs regarding readiness for FT • WECC FT will last 1 calendar year, after which performance per the Standard will be reviewed

  5. BA execution of RBC in WECC FT • All BAs with Peak Load or Max Gen > 500 MW must participate • All BAs must be able to meet the data collection reporting requirements • While CPS2 is waived, it must still be calculated • BAL-007 – a frequency based ACEclock-min limit (BAAL) with a 30 min time limit • No EMS modifications are required and BAs may “loosen” control BUT • BAs must still continue to calculate and report all required quantities.

  6. BA execution of RBC – cont’d • BAs must provide explanation and examples of interfaces Operators will use for RBC compliance • BAs can self-implement the BAAL calculation and monitoring of ACE or use tools provided by the SDT • The SDT tools are for monitoring only and reference the ACE history (e.g. a PI database)

  7. RC participation in WECC RBC FT • RC has authority to direct participating BAs to take corrective action if the RC observes problems it believes may be attributed to the BA operation under the FT. • RC, PWG, SDT will conference call to assess such situations. • The WECC FT document details specific RC actions for different limit violations

  8. Issues and Concerns • There is no CPS2 (L10) limit • PWG proposes an ACE “cap” of 2*L10 beyond which BAs will be expected to reduce ACE within the cap after some duration. • Should the FT run concurrent with other major control changes? • It’s not clear if a BA is allowed to continue to control for ACE, in any manner, while ACE is within the BAAL. Discussion is continuing. • PWG understands that anonymity of the BA to the SDT is required as CPS data is involved. • The resources to collect and analyze FT data is more than PWG can provide. PWG recommends a WECC staff resource

  9. Questions?

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