TAC Meeting

August 03, 2006
09:30 AM - 04:00 PM
ERCOT Austin
8000 Metropolis (Building E), Suite 100
Austin, TX 78744
Dial-In: 512.225.7280
Dial-In Code: 1173



Antitrust Admonition

R. Comstock

9:30 a.m.


Approval of the Draft July 6, 2006 TAC Meeting Minutes (Vote)* 


R. Comstock

9:35 a.m.


ERCOT Board Update *

  • PRR650, Balancing Energy Price Adjustment Due to Non-Spinning Reserve Service Energy Deployment (Vote)*


R. Comstock


9:40 a.m.



April EECP Follow Up

R. Comstock


10:00 a.m.



Credit Working Group Update


M. Davies


10:15 a.m.


Protocol Revisions Subcommittee Report *

  • Nodal Protocol Revision Requests:
    • NPRR002, Section 3, Zonal PRR Synchronization and ERCOT Staff Clarifications (Vote)*
    • NPRR008, PRR307 Inclusion in Nodal (Vote)*
    • NPRR009, Section 6, Adjustment Period and Real-Time Operations (Vote)*
    • NPRR010, Synchronization of PRR630 and Section 3, Management Activities for the ERCOT System (Vote)*
  • Protocol Revision Requests:
    • PRR658, Requirements for Entities Re-entering the ERCOT Market (Vote)*
    • PRR663, Payment When a Resource Receives an OOME Down to Zero (0) MW Dispatch Instruction (Vote)*
    • PRR664, Revise Non-Spinning Reserve Services Performance Monitoring Criteria (Vote)*
    • PRR665, Revise Responsive Reserve Service Performance Monitoring Criteria (Vote)*
    • PRR668, Distribution Loss Factor Calculations (Vote)*
    • PRR672, Retail Market Timing Necessary for PUCT Project 29637 - URGENT (Vote)*
    • Possible PRR to address RPRS issues as directed by July Board - URGENT (Possible Vote)*
  • Notice of PRR Withdrawal:
    • PRR476, Ramp Rate Adherence During Local Congestion*

K. Gresham













10:45 a.m.





12:00 p.m.


Texas Nodal Implementation

  • ERCOT Report*
  • TPTF Report*
    • Milestone-Completion of DAM AS Settlement Business Requirements (Vote)*
    • Milestone-Completion of DAM AS Energy Settlement Business Requirements (Vote)*
  • Post Nodal Implementation Plan (Possible Vote)*


K. Hager

T. Doggett


T. Doggett

1:00 p.m.



Retail Market Subcommittee Report*

  • CMGRR005, Process for Competitive Metering Guide Revisions (Vote)*


S. Bowling

1:45 p.m.



Wholesale Market Subcommittee Report*

  • EECP Action Item Status Update
  • Nodal Assignments
    • Co-optimization Recommendation (Possible Vote)*


B. Belk




2:15 p.m.


Reliability and Operations Subcommittee Report *

  • EECP Action Item Status Update
  • Nodal Assignments


S. Nelson

2:45 p.m.


Commercial Operations Subcommittee Report*

  • EECP Action Item Status Update
  • LPGRR007, IDR Requirement Change (Vote)*


BJ Flowers


3:15 p.m.


Operations Update

  • CenterPoint Dynamic Reactive Project (Vote)*
  • Q&A on June Scores Related to SCE Performance and Monitoring*



D. Woodfin

L. Grimm

3:45 p.m.


Other Business


R. Comstock


4:15 p.m.




R. Comstock


4:30 p.m.


Future TAC Meetings

  • September 7, 2006
  • October 6, 2006 (Friday)




Open Action Items from Previous Meeting(s)

Responsible Party

  • Emergency Demand Service - Demand Side Working Group


  • Review of Cost Benefit Analysis (CBA) Methodology and Process


  • WMS to look at long-term solutions to market issue of LaaRs submitting bid prices less than zero to ensure participation in the RRS market


  • RMS to include retail outage statistics post-implementation of SCR745 in monthly report to TAC


  • RMS and COPS Communications Working Group to review communication issues related to ERCOT December System Outage/Storage Failure and provide recommendations.  In the interim, TAC and RMS should be notified of any system outage issues.


  • TPTF to consider (1) Cost-Based offers in Transition Period to Nodal and (2) Implementation of Orders issued from Project 31540


  • Review of Market Guides (use, naming convention, authority)


  • TPTF to report back to TAC after NMMS business process document discussions with ROS and WMS.


  • Subcommittee Assignments for Nodal Action/Review
    (Responsible subcommittee to provide monthly status reports to TAC):
    • 3.1.1 ERCOT must work with the appropriate TAC Subcommittee to develop procedures for characterizing a Simple Transmission Outage.  (Priority: Low)
    • 3.19(2) An appropriate subcommittee approved by TAC may develop an alternative list through the analysis described below for determining Competitive Constraints.  (Priority: Optional)
    •  3.19(3) The TAC Subcommittee shall perform the following analysis with the goal of developing an objective standard for determining Competitive Constraints.  (Priority: Optional)
    •  5.61(4) The process for determining the verifiable actual costs must be developed by ERCOT, approved by the appropriate TAC subcommittee.  (Priority: Low)
    •  5.6.3(3) The process for determining the verifiable actual costs for a startup attempt under paragraph (2) above must be developed by ERCOT, approved by the appropriate TAC subcommittee.  (Priority: Low)
    • ERCOT shall develop a methodology, subject to TAC approval, to determine the optimal frequency bias for given system conditions.  (Priority: Low)
    • ERCOT shall develop a procedure approved by TAC to deploy Resources providing Non-Spinning Reserve Service.  (Priority: Medium)
    • ERCOT shall develop a procedure for determining which Load Resources to interrupt and to equitably allocate Load Resources to one of two deployment stacks to enable a 50% deployment, which procedure must be approved in advance by TAC.  (Priority: Low)
    • 7.2.1 The appropriate TAC subcommittee shall establish a task force that is open to Market Participants, comprised of technical experts, to develop a naming convention for CRRs consistent with the requirements of the Protocols.  (Priority: Medium)
    • 8.0 In some instances Section 8 requires ERCOT to develop other performance measures that must be approved by the TAC.  (Priority: Medium)


















  • Determine whether co-optimization is feasible and beneficial to implement in the nodal wholesale market as approved by PUCT in Docket 31540.


  • Review reserve margin calculation based on the following (1) previous year?s experience, (2) the forthcoming PUCT rulemaking on resource adequacy, and (3) issues raised by B Bojorquez in 5/4/06 CDR presentation to TAC. 


  • Provide a methodology by August TAC to establish the appropriate level for the scaling factor used in the SCE Performance Charge calculation as defined by PRR661. 


  • Create post Nodal implementation effectiveness evaluation plan.

M. Dreyfus

  • PRR650 sponsor to work with ERCOT to develop analysis requested at June Board and report back to August TAC.


  • Review/revise transmission planning charter based on TAC recommendation for Board approvals presented to June Board.

M. Walker

  • PRR for BOD approvals based on TAC recommendation presented to June Board.

M. Walker

  • Review NPRR003 language (Section 5.5.1(5)) for consistency with Operating Guides.


  • Review PRR653 for further consideration.


  • Consider allocation issues associated with the distribution of RPRS charges.


EECP Action Items:


  • Review of EECP Steps


  • Load forecasting methodology review forum


  • Review of Resource plans and how related to EECP event


  • Review of Settlement calculations specific to RPRS due to capacity insufficiency situation and OOM Replacement Reserve calculation


  • Review of LaaR performance during April EECP event and whether other interruptible load responded.


  • Communication review related to Emergency and Short Supply situations: When to communicate, what to communicate, to whom and how?


  • Review of scheduling of planned generation outages


Scheduled TAC Meetings

Key Documents

Sep 7, 2006 - doc - 179.5 KB
Jul 27, 2006 - doc - 117.5 KB
Aug 4, 2006 - zip - 1 MB
Jul 27, 2006 - doc - 181.5 KB
Jul 27, 2006 - ppt - 143.5 KB
Jul 27, 2006 - pdf - 1.9 MB
Jul 31, 2006 - ppt - 121 KB
Aug 2, 2006 - ppt - 151.5 KB
Aug 2, 2006 - ppt - 127.5 KB
Jul 27, 2006 - doc - 745.5 KB
Jul 27, 2006 - doc - 643 KB
Jul 21, 2006 - doc - 36 KB
Jul 27, 2006 - ppt - 40 KB
9. WMS Report To August TAC_v2
Updated August 4, 2006
Aug 4, 2006 - ppt - 94.5 KB
Aug 3, 2006 - ppt - 34.5 KB
Aug 1, 2006 - ppt - 132.5 KB
Jul 27, 2006 - ppt - 458.5 KB
Jul 27, 2006 - ppt - 143.5 KB
Aug 4, 2006 - zip - 4.7 MB

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