Wholesale Market Subcommittee (WMS) Meeting

January 09, 2013
9:30 AM - 3:30 PM
ERCOT Austin Room 206
7620 Metro Center Dr.
Austin, TX 78744
Teleconference: 1-877-668-4493
Meeting number: 655 539 330
Meeting password: WMSm123!!



Antitrust Admonition 


9:30 a.m.


Election of WMS Chair and Vice Chair (Vote)

  • Welcome New Members 


9:35 a.m.


Approval of Meeting Minutes (Vote)

  • December 5, 2012 

WMS Chair

9:40 a.m.


ERCOT Technical Advisory Committee (TAC) and Public Utility Commission of Texas (PUCT) Updates 

WMS Chair

9:40 a.m.


TAC Assignments (Possible Vote)

  • Criteria for Load Provided Capacity - RCWG
  • Regular Updates on Future Credit Designs - MCWG
  • Revision to Constraint Competitiveness Tests Methodology - CMWG (See CMWG Update)
  • Method for Distributing Congestion Revenue Rights (CRR) Auction Revenues - CMWG (See CMWG Update)
  • Alternatives to Definition of Wholesale Storage Load Created by NPRR461, Energy Storage Settlements Consistent With PUCT Project 39917
  • Potential Locational Marginal Price Variance From Power Storage Operation
  • Other TAC Assignments 

WMS Chair

9:50 a.m.


ERCOT Operations and Market Items:

  • NPRR429, HASL Offset Provision, Draft Alternative NPRR discussion
  • ERCOT Rolling Auction update (NPRR463) - Review Draft CRR Auction Calendar (Possible Vote)
  • Confidentiality of Reliability Must-Run (RMR) Unit Heat Rate Information (Possible Vote)
  • 2013 Ancillary Services Methodology (Vote)
  • Market Impacts of the Dollar Value of Energy for Generation Resources Committed by the RUC Process Per Protocol Section, Energy Offer Curve for RUC-Committed Resources


I. Flores

M. Mereness

I. González 

C. Thompson

R. Surendran

10:00 a.m.


NPRR219, Outages for Resource Owned Equipment and Clarification of Changes in Status of Transmission Element Postings (Possible Vote

WMS Chair

10:30 a.m.


NOGRR050, Resolution Reporting Issues Related to NPRR219 (Possible Vote

WMS Chair

10:35 a.m.


NPRR503, Removal of Language Related to NPRR219 (Possible Vote

WMS Chair

10:45 a.m.


Congestion Management Working Group (CMWG)

  • General Update
  • DRAFT NPRR, Over-mitigation in SCED (Possible Vote)
  • Revisions to Methodology for Setting Max Shadow Price Other Binding Document (OBD) (Vote)
  • NPRR484, Revisions to Congestion Revenue Rights Credit Calculations and Payments (Possible Vote)
  • CRR Auction Revenue Distribution (CARD) Expiration 

M. Wagner

11:00 a.m.


Generation Adequacy Task Force (GATF)

  • General Update
  • Review of 2012 Loss of Load Expectation (LOLE) Study Results

A. Pieniazek

11:30 a.m.





11:45 a.m.


Demand Side Working Group (DSWG)

  • NPRR505, ERS Weather-Sensitive Loads (Possible Vote)


P. Wattles

1:00 p.m.


QSE Managers Working Group (QMWG)

  • General Update
  • NPRR486, Calculation of Generation to be Dispatched (Possible Vote)
  • NPRR491, Updated Distributed Generation and Demand Response Information for ERCOT Referred to WMS by PRS (Possible Vote)
  • NPRR495, Changes to Ancillary Services Capacity Monitor (Possible Vote)
  • 30 min ERS Pilot Review Pilot Results for Recommendations (Possible Vote)
  • Wind Forecast Accuracy Review
  • Wind Generation Resource Energy Deployment Performance (GREDP) Calculation Revision to Incorporate Curtailment Flag Update
  • GREDP and High Dispatch limit (HDL) / Low Dispatch Limit (LDL) Reports
  • Review of draft 2013 Ancillary Service Methodology
  • Discussion of Wind GREDP Revisions 

S. Looney



1:30 p.m.


Resource Cost Working Group (RCWG)

  • General Update
  • NPRR444, Supplemental Reliability Deployments - Recommendations (Possible Vote)
  • Procedure for Determining Actual Fuel Costs for RUC Make-Whole Disputes
  • Long Term Solution on the Value of X (VOX) for short term gas purchase and shaping
  • Draft NPRR Clarifications for RMR Settlement
  • Verifiable Cost Manual Change Control Procedure

B. Hellinghausen


2:00 p.m.


Other Business

  • Emerging Technology Working Group (ETWG) 

WMS Chair

2:30 p.m.


Market Credit Working Group (MCWG) - No Update

M. Holler



Metering Working Group (MWG) - No Update

D. DiSanto





2:45 p.m.

Key Documents

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