1. EDS 2 Early Delivery Systems Review and Request for Approval May 2007 John Webb

2. Page 2 2 EDS 2 – Approach and Schedule March 2007 EDS 2 – Early Delivery Systems Agenda –EDS 2 Context Setting Review –Scope –Approach –System Requirements –Schedule Request for Approval

3. Page 3 3 EDS 2 – Approach and Schedule March 2007 EDS 2 – Early Delivery Systems EDS 2 – Context Setting –3/22/2007 TPTF Meeting Presented EDS 2 Approach and submitted document for comment No comments received –4/25/2007 TPTF Meeting TPTF requested that EDS 2 Approach contain more detail Additional detailed provided and the updated document was submitted for comment –5/22/2007 TPTF Meeting No comments received Can provide overview of EDS 2 as a presentation Request for approval

4. Page 4 4 EDS 2 – Approach and Schedule March 2007 EDS 2 – Early Delivery Systems EDS 2 – Scope of Transition Plan Tasks TasksTransition Plan Task Descriptions 5.4.1 (2a) Verify all data and telemetry submittals meet Protocol 3.10 (NOMCR) 5.4.1 (2b) Verify accuracy of all transmission element constraints 5.4.1 (2c) Verify TSP calculations for transmission constraints likely to be binding in SCED 5.4.2 (1) Verify SE performance meets Protocol 3.10.9 5.4.2 (2) Verify trial of SE test based on live SCADA, resolving errors to meet performance criteria, and to verify bus load forecast functionality 5.4.2 (4) Begin continuous operation of SCADA and post information to TSPs and QSEs meeting Protocol 6.3.2 5.4.3 (1) Begin NSA verification, testing major transmission elements 5.4.3 (2) Compare NSA to Zonal and add contingencies and screening 5.4.3 (3) Continuously monitor Mon-Fri meeting Protocol 6.5.7.1.11

5. Page 5 5 EDS 2 – Approach and Schedule March 2007 EDS 2 – Early Delivery Systems EDS 2 – Approach –Release 3 Verify Telemetry and SE performance Provide performance reports to TSPs and QSEs Verify Network Security Analysis (NSA) Develop Maintenance Procedures –Release 4 Verify Network Model Management System (NMMS) Verify Network Operations Model Change Request (NOMCR) Develop Network Model Maintenance Procedures

6. Page 6 6 EDS 2 – Approach and Schedule March 2007 EDS 2 – Early Delivery Systems EDS 2 Release 3 - Approach –Telemetry Verification Accumulate and calculate monthly and quarterly availability data Generate reporting per Telemetry Standards –Highlight and verify availability issues –Provide on MIS for market participants Develop ERCOT Operations Procedures to address and resolve issues –State Estimator Verification Topology build Forecast bus load Nodal SE solution and compares to Zonal Accumulate and calculate monthly performance data Generate reporting per SE Standards –Highlight and verify data issues –Provide on MIS for market participants Develop ERCOT Operations Procedures to address and resolve issues

7. Page 7 7 EDS 2 – Approach and Schedule March 2007 EDS 2 – Early Delivery Systems EDS 2 Release 3 - Approach –Topology Consistency Analyzer Identify and report on status errors –Forced Outage Detection Identify and report on unplanned outages EDS 3 integrates with the outage scheduler –Network Security Analysis Verify dynamic ratings are correctly calculated Verify overload notification Verify constraints and contingency list Verify Special Protection Schemes (SPS) / Remedial Action Plans (RAP): –Triggering conditions are defined and can be executed –Post-SPS and post-RAP results are correct and can be reported Verify load rollover modeling Verify transmission constraint management (calculate shift factors) Develop Nodal NSA operating procedures Benchmark results against Zonal real time operations

8. Page 8 8 EDS 2 – Approach and Schedule March 2007 EDS 2 – Early Delivery Systems EDS 2 Release 3 - Approach SCADA Telemetry Dynamic Ratings EDWMIS Network Security Analysis State Estimator Topology Consistency Analyzer Transmission Constraint Management Forced Outage Detector

9. Page 9 9 EDS 2 – Approach and Schedule March 2007 EDS 2 – Early Delivery Systems EDS 2 Release 3 - Systems –Release 3 configuration Early releases of software packages –EMS 2.3 (COTS+ - Commercial off the Shelf with customizations) »Telemetry Performance Tool »SE Functionality »SE Performance Tool »NSA Functionality –Enterprise Data Warehouse »Reporting on SE and Telemetry performance by QSE and TSP –MIS Portal »Providing QSE and TSP access to performance reports »Providing QSE and TSP access to hourly status reports >

10. Page 10 10 EDS 2 – Approach and Schedule March 2007 EDS 2 – Release 3 Configuration

11. Page 11 11 EDS 2 – Approach and Schedule March 2007 EDS 2 – Early Delivery Systems EDS 2 Release 4 - Approach –Network Model Management System (NMMS): Network model, ICCP database and with ownership / operatorship information Nodal Network Model is under change control –Network Operations Model Change Request (NOMCR) TSPs and QSEs electronically submit model changes and receive acknowledgement Network model has been correctly updated TSP and QSE updates are confirmed TSPs may export network model for review –Single Entry Model –Network Model Export

12. Page 12 12 EDS 2 – Approach and Schedule March 2007 EDS 2 – Early Delivery Systems EDS 2 Release 4 - Systems –Release 4 configuration Early releases of software packages –Network Model Management System (NMMS) »Database for network model, ICCP mapping, Ownership/Operatorship –EMS 2.3 (COTS+) »Integration with NMMS >

13. Page 13 13 EDS 2 – Approach and Schedule March 2007 EDS 2 – Release 4 Configuration

14. Page 14 14 EDS 2 – Approach and Schedule March 2007 EDS 1 and 2 – Early Delivery Systems EDS 2 Schedule

15. Page 15 15 EDS 2 – Approach and Schedule March 2007 EDS 2 – Early Delivery Systems EDS 2 Approach Questions?

16. Page 16 16 EDS 2 – Approach and Schedule March 2007 EDS 2 – Early Delivery Systems Request for Approval