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Competitive Constraint Test Updates and Bid Limit Adjustments

Review of CMWG meeting focusing on refining competitive constraint tests and setting bid limits for 2013 CRR auctions. Addressed issues like duration, nuclear units in ECI, wind incorporation in portfolio evaluation, and ERCOT's proposed RAPs for secondary constraints.

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Competitive Constraint Test Updates and Bid Limit Adjustments

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  1. CMWG Update to WMS 9-12-12 Report of CMWG Meeting of 9-11-12 M Wagner Edison Mission Marketing & Trading

  2. Discussion of Competitive Constraint Test • Two primary issues with respect to test • Duration of designation (annual, etc.) • Test itself • Do we need annual test? • Discussion that test potentially could be collapsed to monthly/weekly/and or daily—but existing PUCT rule: • §25.502. Pricing Safeguards in Markets Operated by the Electric Reliability Council of Texas (f)(2) • Competitive constraints and noncompetitive constraints shall be designated annually prior to the corresponding auction of annual congestion revenue rights. A constraint may be redesignated on an interim basis. • And corresponding Protocol Language: 3.19 Constraint Competitiveness Tests (6) • TAC shall approve the Competitive Constraints one month prior to the annual Congestion Revenue Right (CRR) Auction.

  3. Discussion of Competitive Constraint Test • A more flexible process may produce results more consistent with the direction of CRR auctions and the energy only market design • Regarding Test itself—for existing language—the issue of WN showing up as not competitive…could be fixed by modifying test with: • Treatment of nuclear units in Element Competitiveness Index (ECI)—currently they are included, proposal not to include them in the portfolio evaluation of generation under control (would be exempt) • Modification of ECI thresholds—last done in 2003 • Incorporate wind at Effective Load Carrying Capability • Change how Shift Factors are included for Stability limit • ….support for W—N being designated as competitive for 2013

  4. RAPs & 2% Shift Factor/Dispatchable Issue • Remedial Action Plans (RAPs) defined for specific constraint/contingency pair(s) • Can have ancillary effect of controlling for subsidiary constraints • ERCOT suggested developing additional RAPs for secondary constraints—CMWG supported • 2% Dispatchable Issue • ERCOT activates constraints when units w/ >2% SF are online and dispatchable, so when such units are offline, constraint may not be active • Goal is proposal from Oct CMWG for Nov WMS

  5. CRR Auction Updates • Credit Work Group meeting 9-27 • To discuss CRR auction credit…interested parties encouraged to attend • Bid limits for 2013 annual auction • Growth of CRR AH to 194. Existing Bid limit is 5000—CMWG & ERCOT comfortable reducing to 2500 per CRR AH for 2013 and 2014 auction • If see add’l bandwidth for 2014 will have time to increase limits prior to 2014 auction • See ERCOT presentation to 9-11 CMWG for add’l info

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