1. 01/21/2009 Telemetry Process & Progress ERCOT State Estimator & LFC Team Operations Advanced Network Applications Support

2. 2 Telemetry Process & Progress01/21/2009 ICCP Telemetry Support Telemetry Reporting State Estimator Tuning Telemetry Issue Process Telemetry Going Forward

3. 3 Telemetry Process & Progress01/21/2009 Telemetry Support ERCOT Full Time Staff ICCP Support –Advanced Network Applications Support 2 Engineers –Control Room 1 Operations Analyst & 1 Shift Engineer –IT 2 System Analysts –Additional Staff on a part time basis Market Participants –Contact for Nodal Issues –Timely Response on detected issues

4. 4 Telemetry Process & Progress01/21/2009 Telemetry Reporting QSE & TDSP Dashboard

5. 5 Telemetry Process & Progress01/21/2009 Telemetry Reporting Wind Dashboard Resource Entity Coding Green = No Telemetry Issues Not Green = Issues to be corrected Does Data Appear to be ‘Good’? Coding Yes (Green) = Data Quality appears to be good, no action needed No (Red) = Data Missing or of questionable quality corrective action needed

6. 6 Telemetry Process & Progress01/21/2009 Telemetry Reporting If a number other then 0 is in column B, then there is missing telemetry which requires Market Participant Corrective Action.

7. 7 Telemetry Process & Progress01/21/2009 Telemetry Reporting State Estimator (SE) Convergence SE & Supporting Telemetry Information is posted on EDW MIS Advanced Network Applications provides analysis assistance and be reached at the EDS3 email: EDS3@ercot.com

8. 8 Telemetry Process & Progress01/21/2009 Telemetry Reporting FIT Report Log of Events & Observations –If your company is listed it means that your involvement/assistance was required to resolve an issue.

9. 9 Telemetry Process & Progress01/21/2009 State Estimator Tuning FIT –Monitors Telemetry –Compares Generation between Zonal & Nodal ICCP Support Team –Analysis Support of FIT Issues –ICCP Issue Resolution Support –Produce FIT Report

10. 10 Telemetry Process & Progress01/21/2009 Current Telemetry Issue Process

11. 11 Telemetry Process & Progress01/21/2009 Telemetry Going Forward SE FIT to continue through 3 rd quarter ’09 Nodal Migration Preparation Testing September ’09 –7/24 monitoring of SE by ERCOT personnel –7/24 reporting of SE performance SE & SCED Testing November ’09 –Continued 7/24 monitoring & reporting on SE –COP, TPO submissions –Monitoring & Reporting of SCED & LMP’s

12. 12 Telemetry Process & Progress01/21/2009 Telemetry Going Forward December ’09 & January ’10 System Wide Open Loop –EMBP & Responsive Reserve Test December ’09 –Non-spin Test January ’10 –Continued 7/24 monitoring of SE & SCED Performance February – December ’10 Production Migration Testing –LFC 2, 8 & 48 Hour Tests –168 Hour Test –2 additional 48 Hour LFC Tests (If required for Migration)