1. Lead from the front Texas Nodal http://nodal.ercot.com 1 Current Telemetry Dashboards NDSWG March 24, 2009

2. Lead from the front Texas Nodal http://nodal.ercot.com 2 Wind Telemetry (as of 03/05/09)

3. Lead from the front Texas Nodal http://nodal.ercot.com 3 Wind Telemetry (as of 03/05/09)

4. Lead from the front Texas Nodal http://nodal.ercot.com 4 Wind Telemetry (as of 03/05/09)

5. Lead from the front Texas Nodal http://nodal.ercot.com 5 QSE Telemetry (as of 03/04/09) * Market Participant is missing nodal unit telemetry. Appropriate points and analogs are to be submitted to ERCOT. (A) ** ERCOT is investigating this telemetry. No action is required from Market Participant at this time. (B) *** Currently, there are no known issues with disputed ownership. ERCOT will contact relevant parties if any questions arise. (C) Please note that tabulations are consistent with 03.04.2009 database load.

6. Lead from the front Texas Nodal http://nodal.ercot.com 6 TSP Telemetry (as of 03/04/09) * Market Participant has indicated it will submit missing telemetry to ERCOT. (A) ** ERCOT is investigating this telemetry. No action is required from Market Participant at this time. (B) *** Currently, there are no known issues with disputed ownership. ERCOT will contact relevant parties if any questions arise. (C) Please note that tabulations are consistent with 03.04.2009 database load.

7. Lead from the front Texas Nodal http://nodal.ercot.com 7 Load Observability (as of 3/10/09)

8. Lead from the front Texas Nodal State Estimator Convergence Rate – February 2009 http://nodal.ercot.com 8 Monthly Convergence – December ‘08 – 80.99%; January ‘09 – 80.29%; February ‘09 – 69.88%

9. Lead from the front Texas Nodal http://nodal.ercot.com 9 State Estimator Convergence Rate – December 2008 - February 2009

10. Lead from the front Texas Nodal http://nodal.ercot.com 10 Focused Input Testing (FIT) III Week 1– State Estimator FIT III Assessment reports will be posted at: http://nodal.ercot.com/readiness/eds3/documents/index.htmlhttp://nodal.ercot.com/readiness/eds3/documents/index.html Key Numbers  82.39% Test Average Convergence  9 of the 27 Test Hours had 100% Convergence Notes  State Estimator (SE) updates to certain applications caused unexpected periods of SE downtime and affected convergence results  AREVA has since corrected the code, which should be in EDS for the next database load  The problem may still be a problem in next week’s FIT testing (sporadic)

11. Lead from the front Texas Nodal Focused Input Testing (FIT) III Week 2 – State Estimator Key Numbers -96.07% Test Average Convergence -20 of the 27 Test Hours had 100% convergence -TDSP database failure – 44.4% for Hour 2 of March 11 http://nodal.ercot.com 11 FIT III Assessment reports will be posted at: http://nodal.ercot.com/readiness/eds3/documents/index.htmlhttp://nodal.ercot.com/readiness/eds3/documents/index.html

12. Lead from the front Texas Nodal http://nodal.ercot.com 12 Appendix: Telemetry & State Estimator Overview of Reports, Processes, and Data

13. Lead from the front Texas Nodal http://nodal.ercot.com 13 ICCP Telemetry Support Telemetry Reporting State Estimator Tuning New Telemetry Point Addition Process Telemetry Issue Process Current Telemetry Status Telemetry Status Whereabouts

14. Lead from the front Texas Nodal http://nodal.ercot.com 14 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

15. Lead from the front Texas Nodal http://nodal.ercot.com 15 Telemetry Reporting QSE & TDSP Dashboard Questions can be sent to eds2@ercot.com eds2@ercot.com

16. Lead from the front Texas Nodal http://nodal.ercot.com 16 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 Questions can be sent to EDS2@ercot.comEDS2@ercot.com

17. Lead from the front Texas Nodal http://nodal.ercot.com 17 Telemetry Reporting If a number other then 0 is in column B, then there is missing telemetry which requires Market Participant Corrective Action. Questions can be sent to EDS2@ercot.com EDS2@ercot.com

18. Lead from the front Texas Nodal http://nodal.ercot.com 18 Telemetry Reporting State Estimator (SE) Convergence SE & Supporting Telemetry Information is posted on EDW MIS The link is: https://nodaleds.ercot.com/pps/tibco/mis/Pages /Market+Information/Real+Time+Market https://nodaleds.ercot.com/pps/tibco/mis/Pages /Market+Information/Real+Time+Market Advanced Network Applications provides analysis assistance and be reached at the EDS2 email: EDS2@ercot.com EDS2@ercot.com

19. Lead from the front Texas Nodal http://nodal.ercot.com 19 SE Convergence Supporting Information Click on More State Estimator Reports and Extracts

20. Lead from the front Texas Nodal http://nodal.ercot.com 20 SE Convergence Supporting Information Click on More State Estimator Convergence Rate Reports

21. Lead from the front Texas Nodal http://nodal.ercot.com 21 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. FIT Reports are posted at: http://nodal.ercot.com/readiness/e ds3/documents/index.html http://nodal.ercot.com/readiness/e ds3/documents/index.html Questions can be sent to EDS2@ercot.com EDS2@ercot.com

22. Lead from the front Texas Nodal http://nodal.ercot.com 22 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

23. Lead from the front Texas Nodal http://nodal.ercot.com 23 New Telemetry Point Addition Process

24. Lead from the front Texas Nodal http://nodal.ercot.com 24 Current Telemetry Issue Process

25. Lead from the front Texas Nodal http://nodal.ercot.com 25 Telemetry Dashboards FIT II & FIT III Assessment reports are posted at: http://nodal.ercot.com/readiness/eds3/documents/index.htmlhttp://nodal.ercot.com/readiness/eds3/documents/index.html The following Telemetry Dashboards are being posted on the Readiness Center: –Wind Telemetry –Observability –QSER & TSP Telemetry The link for these reports is: http://nodal.ercot.com/readiness/eds1/documents/index.html The Reports are posted each time an update is run. The updates are run after a Nodal database update takes place. (Usually twice a month) Report questions can be sent to EDS2@ercot.comEDS2@ercot.com

26. Lead from the front Texas Nodal http://nodal.ercot.com 26 Telemetry Dashboards Telemetry Dashboards }