EDS 2 Early Delivery Systems Release 3 – Workshop August 16, 2007

Page 2 2 EDS 2 – Release 3 August 2007 EDS 2 – Early Delivery Systems Agenda –EDS 2 Release 3 Timeline Key Activities Telemetry Standards Update Nodal Process Models SCADA / NOM Data Issues Management –Next Steps and Questions

Page 3 3 EDS 2 – Release 3 August 2007 EDS 2 - Release 3 Timeline Protocols Standards Zonal Procedures Trans Plan Use Cases Inputs Nodal Procedures MP Extracts Completed Metrics Verified Protocols Activities Timeline Deliverables Nodal TPTF Tele & SE EDS 2 Starts Nodal Critical Path EDS 2 – Rel 3 delivers in phases: EMS delivers in the 1 st phase EDW 2 nd phase MIS 3 rd phase

Page 4 4 EDS 2 – Release 3 August 2007 EDS 2 – Early Delivery Systems Activity ERCOTMPWorkshop Develop and Test Processes and Procedures  Restructure Load Model  tbd Verify and Tune State Estimator  Future Verify Network Security Analysis  Future Measure Telemetry and SE Performance  Report on Telemetry and SE Performance  Future Access Performance Reports via the MIS Portal  Future Manage Data Issues Concerning Performance  Submit / Process Service Requests (NOMCR)  Future EDS 2 Release 3 – Key Activities Today

Page 5 5 EDS 2 – Release 3 August 2007 EDS 2 – Telemetry Standards Update Telemetry Standards Update –Existing Standards were developed in 2006 –Standards can be revised each October –Nodal EMS functionality will measure and report on SCADA performance based on Telemetry Standards –ERCOT proposing revisions to: Align standards to conform with NERC standards format Reference Nodal Protocols and Operating Guides Evaluate standards measurements, metrics and compliance –ERCOT targeting final review of documentation by the end of August 07 –ERCOT requested TAC to identify the group that will review the standards

Page 6 6 EDS 2 – Release 3 August 2007 EDS 2 – Nodal Process Models Nodal Process Models - Overview –Nodal ERCOT Procedures Created based on Nodal Use Cases Updated from existing Zonal Procedures to address new functionality –Nodal ERCOT Process Models Created for each ERCOT organization Developed for high-level processes and lower-level processes Lower-level processes: –Developed for each event that ERCOT needs to respond to –Diagrams workflows within ERCOT organizations –Sets the context for Nodal ERCOT procedures –Refers to Nodal ERCOT procedures in lower level diagram steps –Will be utilized to test ERCOT workflows while verifying EDS 2

Page 7 7 EDS 2 – Release 3 August 2007 EDS 2 – Nodal Process Models Nodal Process Models - Examples –Operations Support – Advanced Network Applications

Page 8 8 EDS 2 – Release 3 August 2007 EDS 2 – Nodal Process Models Nodal Process Models – Examples (2) –Operations Support – Advanced Network Applications

Page 9 9 EDS 2 – Release 3 August 2007 EDS 2 – Nodal Process Models Nodal Process Models – Examples (3) –Operations Support – Advanced Network Applications

Page EDS 2 – Release 3 August 2007 EDS 2 – Nodal Process Models Nodal Process Models – Examples (4) –Operations Support – Advanced Network Applications

Page EDS 2 – Release 3 August 2007 EDS 2 – Early Delivery Systems SCADA / NOM Data Issues Management –Definition Nodal EMS will provide tools to measure SCADA and SE performance Performance measurements are based on Telemetry and SE Standards SCADA not performing to standards will be: –reported using ERCOT Enterprise Data Warehouse functionality –available to ERCOT and to the responsible MP via the MIS portal –resolved jointly between ERCOT Operations Support and the MPs –Conclusion Operations Support will need a Data Issues Management Tool –Short term to resolve p2p issues –Long term to resolve on-going performance issues p2p ICCPICCP MPs Issue Mgmt EMS ERCOT EDW

Page EDS 2 – Release 3 August 2007 EDS 2 – Early Delivery Systems SCADA / NOM Data Issues Management –Basic Tool Requirements SCADA / NOM issues creation –import of issues from EDW or other sources Manage a list of ERCOT and MP contacts with contact information Notify ERCOT and MPs when issues are Assigned, Updated, Closed Manage and track issues –Pending (new issue) –Assigned (to MP and/or ERCOT) –To Implement (Service Request / NOMCR created and linked) –Closed (issue resolved, verified and closed) Web based with a thin client Reporting and Trend Analysis Secure access –ERCOT has access to all issues –MPs can access only their assigned issues

Page EDS 2 – Release 3 August 2007 EDS 2 – Early Delivery Systems Entry Criteria StatusComment EMS Nodal has completed ITest and is installed in EDS 75%EMS is completing 2B & 2C FAT testing prior to the EDS install. EDW Telemetry and SE Performance Reports have completed ITest and are installed in EDS 40%SE Performance reports are completing FAT testing. Telemetry reports will be provided using a workaround until late MIS Portal has completed ITest and installed in EDS 0%MIS will not be available until late MP Readiness StatusComment MPs have enrolled and can access MIS 0%MIS is not available. MPs can retrieve Telemetry and SE Performance Reports 0%MIS is not available, performance reports will be provided via until the portal is operational. EDS 2 Release 3 – Entry Criteria Status

Page EDS 2 – Release 3 August 2007 EDS 2 – Early Delivery Systems Exit Criteria Status TSP/QSE data points reasonably conform to Telemetry and SE Performance criteria 0% ERCOT Operations have operating procedures in place to address performance issues 0% Network Security Analysis functions are verified and ERCOT Operations have procedures in place to manage 15% ERCOT SE is tuned and meets performance criteria 0% Load Modeling has been restructured, load adaptation has been verified and bus load forecast changes have been verified 20% EDW reports correctly post to MIS and can be accessed 0% EDW reports have been verified within ERCOT and by MPs 0% EDS 2 Release 3 – Exit Criteria (current) Status

Page EDS 2 – Release 3 August 2007 EDS 2 – Release 3 Next Steps –Begin EDS 2 Release 3 on September 4 th, 2007 –Schedule WebEx or Workshops to review: State Estimator Tuning Network Security Analysis EDW reports in detail MIS access to reports –Begin planning for EDS 2 Release 4 Questions…