Lead from the front Texas Nodal 1 TPTF Update for TAC March 30, 2007 Trip Doggett

Lead from the front Texas Nodal 2 Agenda ItemDescriptionPurpose 1. Meeting SummarySummary of recent TPTF activitiesFor review 2. Next MeetingsUpcoming activitiesFor review 3. Approval of Milestones Request TAC approval of the following Milestones – Business Requirements Complete for: SCADA Wind Power Forecasting Voltage Support State Estimator Outage Evaluation Network Security and Stability Analysis Load Forecasting Data Models Dynamic Ratings Energy Management System Forced Outage Detection Generation Subsystem For Vote

Lead from the front Texas Nodal 3 Meeting Summary  Meetings February 28 - March 1, March 5-7, and March  On February 28, TPTF discussed the following:  Review and consideration of draft NPRR:  Generation Subsystem Changes to Incorporate Approved Whitepapers  On February 28, TPTF approved the draft NPRR for Generation Subsystem Changes, as modified by TPTF. The motion was approved by a ballot vote of 100% in favor, with two abstentions (City of Allen and City of Eastland). All Market Segments were present.  EMS Requirements Discussion  Review Disposition of Comments and consider possible approval of EMS Generation Subsystem Requirement Document  Additional discussion deferred until March 1

Lead from the front Texas Nodal 4 Meeting Summary – February 28  On February 28, TPTF discussed the following:  EMS Requirements Discussion  Review Disposition of Comments and consider possible approval of EMS SCADA Requirement Document  On February 28, TPTF approved the EMS SCADA Requirements, as modified by TPTF. The motion was approved by a ballot vote of 100% in favor, with two abstentions (City of Dallas and Town of Flower Mound). All Market Segments, except Cooperative, were present.

Lead from the front Texas Nodal 5 Meeting Summary – March 1  On March 1, TPTF discussed the following:  EMS Requirements Discussion  Review Disposition of Comments and consider possible approval of EMS Data Models Requirement Document  On March 1, TPTF approved the EMS Data Models Requirements v0.92, as modified by TPTF. The motion was approved by a ballot vote of 100% in favor, with one abstention (CPS San Antonio). All Market Segments, except Consumer, were present.  Review Disposition of Comments and consider possible approval of EMS Generation Subsystem Requirement Document  On March 1, TPTF approved the EMS Generation Subsystem Requirements v0.92, as modified by TPTF. The motion was approved by a ballot vote of 100% in favor, with no abstentions. All Market Segments, except Consumer, were present.

Lead from the front Texas Nodal 6 Meeting Summary – March 1  On March 1, TPTF discussed the following:  EMS Requirements Discussion  Review Disposition of Comments and consider possible approval of EMS Network Security and Stability Analysis Requirement Document  On March 1, TPTF approved the EMS Network Security and Stability Analysis Requirements v0.92, as modified by TPTF. The motion was approved by a ballot vote of 100% in favor, with two abstentions (CenterPoint and NRG). All Market Segments, except Cooperative and Consumer, were present.  Review Disposition of Comments and consider possible approval of EMS State Estimator Requirement Document  On March 1, TPTF approved the EMS State Estimator Requirements v0.92, as modified by TPTF. The motion was approved by a ballot vote of 100% in favor, with no abstentions. All Market Segments, except Consumer, were present.

Lead from the front Texas Nodal 7 Meeting Summary – March 1  On March 1, TPTF discussed the following:  EMS Requirements Discussion  Review Disposition of Comments and consider possible approval of EMS Dynamic Ratings Requirement Document  On March 1, TPTF approved the EMS Dynamic Ratings Requirements v0.92, as modified by TPTF. The motion was approved by a ballot vote of 100% in favor, with one abstention (Brazos). All Market Segments, except Consumer, were present.  CRR Project Update  Review Disposition of Comments and consider possible approval of EMS Outage Evaluation Requirement Document  On March 1, TPTF approved the EMS Outage Evaluation Requirements v0.92, as modified by TPTF. The motion was approved by a ballot vote of 100% in favor, with no abstentions. All Market Segments, except Cooperative and Consumer, were present.

Lead from the front Texas Nodal 8 Meeting Summary – March 1  On March 1, TPTF discussed the following:  EMS Requirements Discussion  Review Disposition of Comments and consider possible approval of EMS Voltage Support Services Requirement Document  On March 1, TPTF approved the EMS Voltage Support Services Requirements v0.92, as modified by TPTF. The motion was approved by a ballot vote of 100% in favor, with no abstentions. All Market Segments, except Cooperative and Consumer, were present.  Draft NPRR for Opportunity Outage  On March 1, TPTF approved a draft NPRR for Opportunity Outage. The motion was approved by a ballot vote of 100% in favor, with two abstentions (City of Allen and Eastland). All Market Segments, except Cooperative, were present.

Lead from the front Texas Nodal 9 Meeting Summary – March 1  On March 1, TPTF discussed the following:  EMS Requirements Discussion  Review Disposition of Comments and consider possible approval of EMS Forced Outage Detection Requirement Document  On March 1, TPTF approved the EMS Forced Outage Detection Requirements v0.92, as modified by TPTF. The motion was approved by a ballot vote of 100% in favor, with two abstentions (City of Allen and City of Eastland). All Market Segments, except Cooperative, were present.  Review Disposition of Comments and consider possible approval of EMS Overall Energy Management System Requirement Document  On March 1, TPTF approved the EMS Overall Energy Management System Requirements v0.91. The motion was approved by a ballot vote of 100% in favor, with two abstentions (City of Allen and City of Eastland). All Market Segments, except Cooperative and Consumer, were present.

Lead from the front Texas Nodal 10 Meeting Summary – March 1  On March 1, TPTF discussed the following:  EMS Requirements Discussion  Review Disposition of Comments and consider possible approval of EMS Load Forecasting Requirement Document  On March 1, TPTF approved the EMS Load Forecasting Requirements v0.92, as modified by TPTF. The motion was approved by a ballot vote of 100% in favor, with one abstention (Calpine). All Market Segments, except Cooperative and Consumers, were present.  Review Disposition of Comments and consider possible approval of EMS Wind Power Forecasting Requirement Document  On March 1, TPTF approved the EMS Wind Power Forecasting v0.91. The motion was approved by a ballot vote of 100% in favor, with two abstentions (CPS San Antonio and CenterPoint). All Market Segments, except Cooperative and Consumer, were present.

Lead from the front Texas Nodal 11 Meeting Summary – March 5  On March 5, TPTF discussed the following:  Nodal Program Update  NMMS Project  Draft NPRR for Hub Clarification  Commercial Systems Project  Draft NPRR to clarify HSL values for WGRs and WGR values to be used in RUC Capacity Short Calculation  On March 5, TPTF approved a Draft NPRR to clarify HSL values for WGRs and WGR values to be used in RUC Capacity Short Calculation. The motion was approved by a ballot vote of 100% in favor, with three abstentions (City of Allen, City of Eastland, and Exelon). All Market Segments, except Independent Generator, were present.  Market Management System Project Update

Lead from the front Texas Nodal 12 Meeting Summary – March 5  On March 5, TPTF discussed the following:  Commercial Systems Project  Draft NPRR for Settlement of Non-Modeled Generators  On March 5, TPTF approved a Draft NPRR for Settlement of Non-Modeled Generators. The motion was approved by a ballot vote of 100% in favor, with four abstentions (LCRA, Calpine, City of Allen, and City of Eastland). All Market Segments were present.  Discussion of Protocol Revision Request (PRR) 697, Posting Requirement Changes

Lead from the front Texas Nodal 13 Meeting Summary – March 6  On March 6, TPTF discussed the following:  NPRR040, Synchronization of EECP Event Realignment  Market Information System (MIS) Update  IDA Project - Interface Update  Market Readiness Advisor (MRA) Metrics Update

Lead from the front Texas Nodal 14 Meeting Summary – March 7  On March 7, TPTF discussed the following:  Training Update  Accountable Executive Update  NPRR037 – Conforming Section 13 to Nodal Format  Draft NPRR for Removal of Pseudo Resource  On March 7, TPTF approved a Draft NPRR for Removal of Pseudo Resource. The motion was approved by a ballot vote of 71.4% in favor, with two abstentions (GEUS and CPS San Antonio). All Market Segments were present.  Draft NPRR for Pricing During an EECP Event

Lead from the front Texas Nodal 15 Meeting Summary – March 22  On March 22, TPTF discussed the following:  Nodal Program Update  Market Readiness Advisor Update  IRT Project  EDS-1 Approach Document  On March 22, TPTF approved the EDS-1 Approach Document v1.4, as modified by TPTF. The motion was approved by a ballot vote of 100% in favor, with five abstentions (CenterPoint, City of Dallas, City of Allen, City of Eastland, and Town of Flower Mound). All Market Segments were present.  Initial Review of EDS-2 Approach Document  Proposed changes to Telemetry Standards and timing for RTU to ICCP changes  IRT Project  Market Feedback on Ancillary Service Self-Certification  Draft NPRR for Standard Form MP Agreement and Registration Corrections

Lead from the front Texas Nodal 16 Meeting Summary – March 23  On March 23, TPTF discussed the following:  MIS Update  EDW Project  Initial Review of Independent Market Monitor (Section 17) EDW Requirements  Initial Review of EDW Conceptual System Design Document  Approach to prepare Performance Monitoring and Compliance EDW Requirements  IDA Project  Posting of Use Cases  Training Update  Commercial Systems Project  Draft NPRR on Voltage Support  On March 23, TPTF approved the draft NPRR on Voltage Support. The motion was approved by a ballot vote of 100% in favor, with three abstentions (CenterPoint, Reliant, and GEUS). All Market Segments, except Independent Generators, were present.

Lead from the front Texas Nodal 17 Meeting Summary – March 23  On March 23, TPTF discussed the following:  Draft NPRR, Companion to PRR697, Posting Requirement Changes for Projected Assessment of System Adequacy (PASA)  Update on Hub Clarification  Draft NPRR for New Trading Hub at Venus Switching Station  Service Level Agreement for MP Sandbox

Lead from the front Texas Nodal 18 Next Meetings  Next meetings  Monday, April 2 and Tuesday, April 3  Monday April 23 through Wednesday April 25  Monday May 7 and Tuesday May 8  Monday May 21 through Wednesday May 23

Lead from the front Texas Nodal 19 Next Meetings (continued)  On April 2-3, we plan to discuss:  Nodal Program Update  MIS Update  Market Readiness Advisor Update  CRR Project  Review of Optimization Run Time  Status of Detail Design Documents  IDA Project  Update on Integration Activities  MP Interface Document  Registration of Assets  Review of Communications Handbook & Discussion of Other Interface Documents

Lead from the front Texas Nodal 20 Next Meetings (continued)  On April 2-3, we plan to discuss:  IRT Project  Initial Review of EDS-3  Initial Review of Market Participant Qualification Guide  Draft NPRR on Standard Form Market Participant Agreement  Review of Registration Approach  Draft NPRR on Hub Clarification  Draft NPRR for New Trading Hub at Venus Switching Station  Companion NPRR to PRR697, Posting Requirement Changes - PASA only discussionPRR697  Companion NPRR to PRR709, Scarcity Pricing MechanismPRR709  NPRR040, Synchronization of Emergency Electric Curtailment Plan (EECP) Event RealignmentNPRR040  Companion NPRR to PRR647, Gross and Net MW/Mvar Data ReportingPRR647  Review of TPTF Charter  Review of Transition Plan  PRS Assignments

Lead from the front Texas Nodal 21 TAC Approval of Milestones  On February 28, TPTF approved the EMS SCADA Requirements, as modified by TPTF. The motion was approved by a ballot vote of 100% in favor, with two abstentions (City of Dallas and Town of Flower Mound). All Market Segments, except Cooperative, were present.  On March 1, TPTF approved the EMS Data Models Requirements v0.92, as modified by TPTF. The motion was approved by a ballot vote of 100% in favor, with one abstention (CPS San Antonio). All Market Segments, except Consumer, were present.  On March 1, TPTF approved the EMS Generation Subsystem Requirements v0.92, as modified by TPTF. The motion was approved by a ballot vote of 100% in favor, with no abstentions. All Market Segments, except Consumer, were present.  On March 1, TPTF approved the EMS Network Security and Stability Analysis Requirements v0.92, as modified by TPTF. The motion was approved by a ballot vote of 100% in favor, with two abstentions (CenterPoint and NRG). All Market Segments, except Cooperative and Consumer, were present.  On March 1, TPTF approved the EMS State Estimator Requirements v0.92, as modified by TPTF. The motion was approved by a ballot vote of 100% in favor, with no abstentions. All Market Segments, except Consumer, were present.

Lead from the front Texas Nodal 22 TAC Approval of Milestones  On March 1, TPTF approved the EMS Dynamic Ratings Requirements v0.92, as modified by TPTF. The motion was approved by a ballot vote of 100% in favor, with one abstention (Brazos). All Market Segments, except Consumer, were present.  On March 1, TPTF approved the EMS Outage Evaluation Requirements v0.92, as modified by TPTF. The motion was approved by a ballot vote of 100% in favor, with no abstentions. All Market Segments, except Cooperative and Consumer, were present.  On March 1, TPTF approved the EMS Voltage Support Services Requirements v0.92, as modified by TPTF. The motion was approved by a ballot vote of 100% in favor, with no abstentions. All Market Segments, except Cooperative and Consumer, were present.  On March 1, TPTF approved the EMS Forced Outage Detection Requirements v0.92, as modified by TPTF. The motion was approved by a ballot vote of 100% in favor, with two abstentions (City of Allen and City of Eastland). All Market Segments, except Cooperative, were present.  On March 1, TPTF approved the EMS Overall Energy Management System Requirements v0.91. The motion was approved by a ballot vote of 100% in favor, with two abstentions (City of Allen and City of Eastland). All Market Segments, except Cooperative and Consumer, were present.

Lead from the front Texas Nodal 23 TAC Approval of Milestones  On March 1, TPTF approved the EMS Load Forecasting Requirements v0.92, as modified by TPTF. The motion was approved by a ballot vote of 100% in favor, with one abstention (Calpine). All Market Segments, except Cooperative and Consumers, were present.  On March 1, TPTF approved the EMS Wind Power Forecasting v0.91. The motion was approved by a ballot vote of 100% in favor, with two abstentions (CPS San Antonio and CenterPoint). All Market Segments, except Cooperative and Consumer, were present.

Lead from the front Texas Nodal 24 TAC Approval of Milestones (continued)  The Transition Plan says: “Any declaration of the accomplishment of a major milestone (business requirements, conceptual design, and successful completion of Market Participant testing) or a decision to proceed is contingent on the approval of both ERCOT and TAC.”  Request TAC approval of the following Milestones – Business Requirements Complete for:  SCADA  Wind Power Forecasting  Voltage Support  State Estimator  Outage Evaluation  Network Security and Stability Analysis  Load Forecasting  Data Models  Dynamic Ratings  Energy Management System  Forced Outage Detection  Generation Subsystem

Lead from the front Texas Nodal 25 Questions