1. http://nodal.ercot.com 1 Single Entry Model (SEM) Go-Live Update for NIT June 22, 2009 Matt Mereness

2. http://nodal.ercot.com 2 SEM Update for NIT SEM Overview SEM Go-Live Update Market Testing and Training Update Market Dashboard FAQ Update on 2 TAC Issues –Posting of Model/NOMCRs for TSPs only and Approvers for SEM Go-Live Reminders / Q&A Appendix/Supporting Info –Go-Live outreach, timeline, and activities –Training overview and sign-up –Dates/ methods to test submissions of NOMCRs –SEM Go-Live Criteria

3. http://nodal.ercot.com 3 SEM Go-Live Overview Single Entry Model (SEM) Go-Live is the switchover on Aug 31, 2009 for TSP submissions of network operations model change requests –from “Service Request” submissions via TML –to “NOMCR” submissions via the NMMS System of record for model changes becomes NOMCRs on 8/31//09 System of record for Network operations Model for reliability and dispatch remains Zonal/Genesys system until Dec 2010 TSP Current Activity Submit Modeling Change via Service Request ERCOT Uploads Svc Request into Zonal Genesys Model ERCOT Copies/Converts Zonal Model “seed” Into Nodal NMMS Model TSP Aug 31, 2009 Submit Modeling Change via NOMCR/NMMS Tool (includes ICCP) ERCOT Incrementally Converts NOMCR Into Svc Req Uploads into Zonal Genesys Model ERCOT uploads NOMCR Into Nodal NMMS Model to support nodal testing Data Consistency Checks are run to ensure model synchronization/fidelity Periodic checks are run to ensure model synchronization/fidelity Full Copy Incr. NOMCR

4. 4 Current Network Operations Model Maintenance for TSPs ERCOT Zonal EMMS Model (system of record through 12/1/2010) Submits Service Request to Change Model ERCOT Nodal NMMS Model (nodal testing model- CIM file for EMS/MMS/etc) Periodic full copy and conversion of model (zonal seed used for nodal systems) TSP

5. 5 After 8/31/2009: SEM Go-Live Network Operations Model Maintenance for TSP ERCOT Zonal EMMS Model (system of record through 12/1/2010) ERCOT Nodal NMMS Model (nodal testing model- CIM file for EMS/MMS/etc) ERCOT enters NOMCRs into zonal model ERCOT runs consistency checks to ensure models are aligned and maintained Submits Model Change Request (NOMCR) TSP NMMS Model System of Record Nodal Go-Live 12/1/2010

6. 6 Network Operations Model Maintenance for Resource & QSE (today and post 8/31/09) ERCOT Zonal EMMS Model (system of record through 12/1/2010) ERCOT Nodal NMMS Model (nodal testing model- CIM file for EMS/MMS/etc) ERCOT enters into zonal model NMMS Model System of Record Nodal Go-Live 12/1/2010 Submits RARF (Resource Asset Reg Form) via Service Request Submits ICCP Change via Service Request ERCOT process QSE RE

7. http://nodal.ercot.com 7 Go-Live Timeline and Activities SEM Go-Live 8/31/09

8. http://nodal.ercot.com 8 SEM Go-Live Update Communication and Calendar –May 6 th ERCOT began TSP outreach through Wholesale Client Services TDSP/TO associations sent to 23 TOs Solicit training headcount from TOs (pre and post Go-Live) Good response from TOs –May 15- Market Notice sent for SEM Kick-off call to occur –May 28- SEM Kick-off WebEx 10:00-11:30am Go-Live timelines and activities for June - August 2009 Training overview and sign-up Dates and access methods to test submissions of NOMCRs Communications mailbox and SEM market call schedule –June 4- Start weekly Thursday SEM Calls at 2-3pm (through go-live/August) Company attendance is recorded ERCOT provide updates on testing and training Highlight issues or Frequently Asked Questions Open Question/Answer session for TSPs Meetings will be posted on new ERCOT calendar page at: http://www.ercot.com/committees/nodal/eds/sem/index http://www.ercot.com/committees/nodal/eds/sem/index –June 8- Testing environment available to TSPs (through Aug 10) –June 22- Weekly classroom training for 6-weeks (through July 30)

9. http://nodal.ercot.com 9 SEM Go-Live Update What is ERCOT doing this week? –Continuing Market Users set-up and ERCOT stress testing Stress testing still underway but good-to-go for training next week Training pilot completed Preparing for first course June 23 –Delivering first training class Training enrollment to date and system access requests –7 people currently scheduled for kick-off class June 23-25 –July 14-16 class is already full (may change – monitor via LMS) –Openings still available in other classes CIM Model –All those that requested the populated CIM XML file to date have received it Communications during the week – NOMCR Help –Access/permissions/setup issues –Questions as users testing application –Minor system issues

10. http://nodal.ercot.com 10 Market Testing & Training Update Communication of requests Training Requests –Sign up using LMS system Training page: http://nodal.ercot.com/training/courses/index.htmlhttp://nodal.ercot.com/training/courses/index.html Enrollment: https://www.ercottraining.com/lms/default.asphttps://www.ercottraining.com/lms/default.asp Dates- June 23-25, June 30- July 2, July 7- 9, 14-16, 21-23, 28-30 Training materials posted –http://www.ercot.com/committees/nodal/eds/sem/http://www.ercot.com/committees/nodal/eds/sem/ Test system access request –Email nomcrhelp@ercot.com for system accessnomcrhelp@ercot.com Populated CIM file request –Request file from nomcrhelp@ercot.comnomcrhelp@ercot.com –Pressing CDs and mailing to TSP upon request

11. SEM Go-Live Dashboard TO/TDSP Attendance at any of the SEM Market Calls # of Representatives scheduled to take SEM Training # of TDSP users with access to the test SEM environment AEP TEXAS CENTRAL COMPANY  1115 BRAZOS ELECTRIC POWER CO OP INC (TDSP)  66 BROWNSVILLE PUBLIC UTILITIES BOARD (TDSP)  11 BRYAN TEXAS UTILITIES (TDSP)  13 CENTERPOINT ENERGY HOUSTON ELECTRIC LLC (TDSP)  79 CITY OF AUSTIN DBA AUSTIN ENERGY (TDSP)  10 CITY OF COLLEGE STATION (TDSP)  1 CITY OF GARLAND (TDSP)  22 CPS ENERGY (TDSP)  33 DENTON MUNICIPAL ELECTRIC (TDSP)  12 GEUS (TDSP)  GLOBAL AIR SCIENCES INC (TDSP)  6 GOLDEN SPREAD ELECTRIC COOPERATIVE INC (TSP)  1 LCRA TRANSMISSION SERVICES CORPORATION  22 ONCOR ELECTRIC DELIVERY COMPANY  59 RAYBURN COUNTRY CO OP DBA RAYBURN ELECTRIC (TDSP)  3 RIO GRANDE ELECTRIC CO OP (TDSP)  SOUTH TEXAS ELECTRIC CO OP INC  33 TEXAS MUNICIPAL POWER AGENCY  22 TEXAS-NEW MEXICO POWER CO (TDSP)  14 TOTAL: 175978 # of TDSPs represented # of MP Reps scheduled to be trained # of TDSP users with access to test SEM environment

12. http://nodal.ercot.com 12 SEM Market Call- FAQ RESET password (if you cannot remember your user account/password for the ERCOT network). User name is usually first initial last name (eg, John Smith would be jsmith). If you do not remember either, the password will need to be re-set through the ERCOT Helpdesk (the implementation team cannot administer passwords). –Step 1- if you don’t have an ERCOT digital certificate, contact your company’s USA –Step 2- if you can’t remember your user name and/or password EMAIL the ERCOT Helpdesk, Helpdesk@ercot.com First and Last name DUNS number Phone number so they can contact you with the new password DATA RETENTION –The NOMCR data will need to be refreshed from time-to-time, so recognize that ERCOT may do so –ERCOT will only do the refresh after 5pm to avoid MPs losing their work in the middle of the day Service Level Agreement- the SLA for this NMMS testing platform is business hours Monday- Friday. The systems will be kept available after-hours and weekends, but support of questions and system issues will only be worked during regular business hours. Performance- ERCOT is continuing to test and optimize configurations in this test environment, so there are some performance issues to be expected in the early days, with the goal of improving performance in advance of the first training session June 23. Production system access- this access is only to the test environments. The final environment in August will require additional requests and participation from the USA for your company to assign the appropriate NMMS role.

13. http://nodal.ercot.com 13 SEM Market Call- Open Issues Will there be focused ICCP-only training or a guide for SCADA-focused employees? Can an MP modeler set-up new equipment, and then have another user make the ICCP assignment? Can ERCOT set-up a read-only role? This issue is now closed: Can ERCOT post any training materials early to support testing? (Posted on 6/15 at http://www.ercot.com/committees/nodal/eds/sem/index) http://www.ercot.com/committees/nodal/eds/sem/index

14. Update on 2 TAC Issues At TAC two changes were adopted to the SEM Go-Live Procedure –Update posted http://nodal.ercot.com/readiness/golive/index.htmlhttp://nodal.ercot.com/readiness/golive/index.html TAC adopted approach of posting Populated CIM Model to only TSPs –Interim solution –Longer-term still need to determine: When should populated model file be available for all MPs prior to overall nodal go-live, Feb 2010 integrated trials? Resolution of posting of Private Use Network load estimates that are within model TAC adopted approver of SEM Go-Live to be the NIT (NIT/TAC/Board) Nodal Implementation Team established, with first meeting June 22

15. http://nodal.ercot.com 15 Reminders and Q&A Reminders: –Training requests Enroll at https://www.ercottraining.com/lms/default.asphttps://www.ercottraining.com/lms/default.asp –Test system access request Email nomcrhelp@ercot.com for system accessnomcrhelp@ercot.com –Populated CIM file request Email nomcrhelp@ercot.com for CIM filenomcrhelp@ercot.com Pressing CDs and mailing to TSP upon request –Next Weekly Market Call- June 25, 2009 http://www.ercot.com/committees/nodal/eds/sem/ Questions and Answers

16. http://nodal.ercot.com 16 Appendix/Supporting Info –Go-Live outreach, timeline, and activities –Training overview and sign-up –Dates/ methods to test submissions of NOMCRs –SEM Go-Live Criteria

17. http://nodal.ercot.com 17 Go-Live outreach, timeline, and activities Communication –May 6 th ERCOT began TSP outreach through Wholesale Client Services TDSP/TO associations sent to 23 TOs Solicit training headcount from TOs (pre and post Go-Live) Good response from TOs

18. http://nodal.ercot.com 18 Go-Live outreach, timeline, and activities (continued) Communication and Calendar –May 15- Market Notice sent for SEM Kick-off call to occur –May 28- SEM Kick-off WebEx 10:00-11:30am Go-Live timelines and activities for June - August 2009 Training overview and sign-up Dates and access methods to test submissions of NOMCRs Readiness metrics related to training and testing Communications mailbox and SEM market call schedule –June 4- Start weekly Thursday SEM Calls at 2-3pm (through go-live/August) Company attendance is recorded ERCOT provide updates on testing and training Highlight issues or Frequently Asked Questions Open Question/Answer session for TSPs Meetings will be posted on ERCOT calendar at http://www.ercot.com/committees/nodal/eds/http://www.ercot.com/committees/nodal/eds/ –June 8- Testing environment available to TSPs (through Aug 10) –June 22- Weekly classroom training for 6-weeks (through July 30)

19. http://nodal.ercot.com 19 Go-Live outreach, timeline, and activities (continued)

20. http://nodal.ercot.com 20 Go-Live outreach, timeline, and activities (continued) –Transition periods: June 1- Aug 30, 2009 (objective to minimize SvcReq during this period) –Submit changes as far in advance as possible –No equipment name changes (defer until after SEM Go-Live 8/31/09) Aug 15-30, 2009 –Two weeks no submissions, except for emergency changes Aug 31, 2009 - Feb 2010 (NOMCRs for any/all network changes) –After 8/31/09 TSPs will work to validate the network model and align to their in-house systems –Initially the NOMCR timeline will align with zonal timeline »30-day lead-time, compliant with current zonal database schedulezonal database schedule »Status is tracked and communicated via system emails –Any SRs that did not go into zonal production will be converted by ERCOT to NOMCRs for verification/submission by TSPs in Sept –In 2010 TSPs gradually transition to NodalProtocols(3.10) 90-day timeline submission requirements

21. http://nodal.ercot.com 21 Training Overview and Sign-Up TSP Submission Testing and Training will be the same system/database -Model to be used will be snapshot from October 2008 -Training audience is the TSP network operations modelers/staff Submission Testing system access –Available June 8 – Aug 10 –NOMCR testing system will be on-line and available to all TSPs –ERCOT has established a dedicated email and have staff available to support questions (nomcrhelp@ercot.com)nomcrhelp@ercot.com Training to be hosted in Taylor –Pre-SEM classes June 22 – Aug 3 Current plans for at least six 3-day sessions Planning for 12-18 seats for each class Large dedicated training room –Post-SEM classes Sept 23- Oct 20 Fewer sessions and smaller classes (tbd) Make-up classes, not just-in-time training for all staff after go-live

22. http://nodal.ercot.com 22 Training Overview and Sign-Up (continued) Classroom schedule for the 3-day class One class per week for 6 weeks Start 1pm Tuesday / End noon Thursday Trainees can stay in Lab Thursday afternoon for Q&A If schedule fills up, ERCOT will shorten class to 2-days for the overbooked weeks June 23-25, June 30- July 2 July 7- 9, 14-16, 21-23, 28-30 Next 4 slides show summary of training format and equipment Note that testing/training will only include Level 1 Validation Level 1 – Automatic by the system upon submitting. Level 2 – Visual by the N/W Model Coordinator Level 3 – Power flow run on the one NOMCR. Level 4 – Power flow run on all NOMCRs for that day. Level 5 – Power flow run on the AREVA system.

23. Training (continued)

27. http://nodal.ercot.com 27 Training Overview and Sign-Up (continued) Sign-up for access to test environment starts today System access began June 8 th Email request to nomcrhelp@ercot.comnomcrhelp@ercot.com Test environment requires a valid digital certificate (production or nodaltest) -Digital certificates are to be coordinate with your company’s USA -Include in email: Employee Name- TSP/Company Name- DUNS- Email address- Alternate/Centralized Email address for status change- Primary phone- Alternate phone- Sign-up for training will be discussed next week Weekly slots available for up to 18 participants Looking to leverage LMS/Training system to coordinate and track training Training classes occur each week from June 23 through July

28. http://nodal.ercot.com 28 SEM Go-Live Criteria SEM Go-Live Criteria defined in the SEM Go-Live Procedure http://nodal.ercot.com/readiness/golive/index.html http://nodal.ercot.com/readiness/golive/index.html Section 4- The following entry criteria shall be met for SEM Go-Live –TSPs & ERCOT complete EDS 2 Release 4 activities (next page) –Nodal network model validated and approved as baseline for SEM Go-Live by ERCOT System Ops and Market Ops Directors –ERCOT publishes CIM model to be used for SEM Go-Live –ERCOT sufficiently staffed for maintenance of nodal & zonal systems –Nodal EMS is capable of consuming NMMS CIM files through the EMS CIM importer for use in the Nodal EMS application suite –SEM Go-Live readiness approved by TPTF, TAC and ERCOT BOD presume ROS approval in place of TPTF –ERCOT publishes the following documents for TSPs NMMS Modeling Guidelines / Validation Rules document Latest CIM data dictionary and schema ERCOT Network Operations Model validation whitepaper ERCOT Network Operations Model validation results

29. http://nodal.ercot.com 29 SEM Go-Live Criteria (cont’d) –All TSPs complete EDS 2 Release 4 activities MPs have enrolled and can access the ERCOT MIS portal MPs have been trained on the NOMCR process TSPs can electronically submit data changes utilizing the NOMCR user interface and CIM compliant format for data exchange or via the manual MIS NOMCR process QSEs can submit data changes utilizing the registration submission and subsequent ERCOT NOMCR process MPs can receive NOMCR acknowledgement of submittals, verifications, and confirmation of data posting –ERCOT completes EDS 2 Release 4 activities ERCOT is ready to fully utilize the NOMCR process for all TSP/QSE data change requests TSP MPs can successfully submit data changes via the CIM compliant electronic NOMCR process. QSE can successfully submit data changes through registration submissions (and updated in the Network Operations Model via the NOMCR process) ERCOT has processes in place to use a “single entry point” to maintain both Nodal and Zonal network model databases when MPs submit changes via the NOMCR process NMMS is the database of record for the Network Operations Model including the ICCP modeling point database and operatorship / ownership information NMMS database is under full change control by ERCOT Network Model Group ERCOT discontinues the use of Service Requests for data changes and change control ERCOT begins the use of the NOMCR process for data changes and change control