1. http://nodal.ercot.com 1 Market Trials Real-Time Market / LFC Weekly Update July 9, 2010

2. http://nodal.ercot.com 2 Antitrust Admonition ANTITRUST ADMONITION ERCOT strictly prohibits Market Participants and their employees who are participating in ERCOT activities from using their participation in ERCOT activities as a forum for engaging in practices or communications that violate the antitrust laws. The ERCOT Board has approved guidelines for members of ERCOT Committees, Subcommittees and Working Groups to be reviewed and followed by each Market Participant attending ERCOT meetings. If you have not received a copy of these Guidelines, copies are available at the Client Relations desk. Please remember your ongoing obligation to comply with all applicable laws, including the antitrust laws. DISCLAIMER All presentations and materials submitted by Market Participants or any other Entity to ERCOT staff for this meeting are received and posted with the acknowledgement that the information will be considered public in accordance with the ERCOT Websites Content Management Operating Procedure.

3. http://nodal.ercot.com 3 Agenda Antitrust Admonition Environment Report –Planned / unplanned outages –Known Issues Standing Reports and Updates –General reminders / updates –RTM / LFC Update –State Estimator Convergence Statistics –Changes in Market Trials Activities –5-Hour LFC Test Reminders –8-Hour LFC Test Results Question and Answers / General Discussion ERCOT asks that Market Participants log into the WebEx session using their company name and then their name. This will allow ERCOT to take roll-call offline

4. http://nodal.ercot.com 4 Environment Report: Planned / Unplanned Nodal Outages Planned Outages –07/09/2010 6:00 – 10:00 P.M. Availability of the following application services will be affected as a result of software migrations being planned during this period ( Note: External Interface Specification v1.19M will take into effect upon completion of this migration ) –EWS ( Web Services) –MM UI –OS UI –CRR Unplanned Outages –N/A

5. http://nodal.ercot.com 5 Known Issues Recently Opened Issues Need to add notification to Market Participants for AS Capacity Monitoring –ERCOT is required to continuously compare the sum of the QSE's Resource AS Responsibilities in the EMS (already calculated within the EMS) with the QSE's total AS Supply Responsibility in the MMS system –This comparison should be done separately for Regulation Up, Regulation Down, RRS, and NSRS, and then noticed via web service alerts and MIS Certified postings for instances in which the comparison indicates that the EMS value for any of the four services is less than the MMS value. –This issue has been logged to track progress toward building the EMS notification into web services. Recently Close Issues NP6-552-Group 1 and Group 2 Load Resources for RRS (MIS Certified Report) –Duplicate reports were being created for some DUNS numbers –Affected CDR

6. http://nodal.ercot.com 6 Standing Reports and Updates: General Reminders / Updates Reminders/Updates Tracking Artifacts –The Known Issues and SPP Issues tracking sheets will refresh overnight to the Readiness center at http://nodal.ercot.com/readiness/markettrials/rtm/index.html http://nodal.ercot.com/readiness/markettrials/rtm/index.html Network Model Update –The current system loaded from the model 07/01/10 –Next scheduled load is 07/14/10 Note that this database load may be delayed due to the 5-Hour LFC test the week of the 19 th. This will be communicated via a market notice. EMS Alerts –ERCOT will increase the frequency and length of time for testing Telemetry Alerts starting 7/8/2010 –Submit any questions to markettrials@ercot.commarkettrials@ercot.com 168-Hour Test Handbook –Posted on the Readiness Center at http://nodal.ercot.com/readiness/markettrials/index.html http://nodal.ercot.com/readiness/markettrials/index.html

7. http://nodal.ercot.com 7 Standing Reports and Updates: General Reminders / Updates Reminders/Updates Full-System/LFC tests (see July 1 Market Notice) –ERCOT is updating the Market Trials Phase 5.0 test schedule to incorporate additional Full-System/LFC tests, as follows: Week of July 19:5-Hour Full-System/LFC Test (July 20 – 22) Week of August 2:24-Hour Full-System/LFC Test (August 3 – 5) –These tests will be conducted in lieu of the previously scheduled 48-Hour LFC Test Consolidated LFC Full-System LFC Test Approach –Posted on the Readiness Center at http://nodal.ercot.com/readiness/markettrials/rtm/index.html http://nodal.ercot.com/readiness/markettrials/rtm/index.html Real-Time /LFC Market Trials Handbook –Document is being updated to synchronize with current Market Trials schedule around LFC testing –Will be posted to the Readiness Center in the next few days GREDP Results from the 8-Hour LFC Test –Individual GREDP results were distributed to QSEs on July 8

8. 10/14/2015 http://nodal.ercot.com 8 Real Time Market / LFC Update

9. http://nodal.ercot.com 9 SCED Week 23 SL at $2250 offer cap for 34 intervals (compared to 104 last week) Thursday 7/1 ERCOT conducted constraint transfer testing Nodal system was over constrained and LMPs diverged as a result Sunday 7/4 price differences due to binding constraint Jackson County to Reno 138 kV

10. http://nodal.ercot.com 10 State Estimator Convergence

11. http://nodal.ercot.com 11 State Estimator Convergence Update State Estimator Daily Convergence Statistics (these percentages are graphed in the next slide) MonthDay% Convergence (Including Solved w/ Mismatch) JUN2892.2 JUN2996.42 JUN3098.04 JUL198.02 JUL299 JUL399.31 JUL496.23 JUL5100

12. http://nodal.ercot.com 12 State Estimator Convergence Update

13. 13Texas Nodal Changes in Market Trials Activities Scott Middleton

14. Issues encountered during the 8-Hour LFC test demonstrated the need to shift the focus of Market Trials Activities The following changes are to achieve the following: Reduce the number of DAMs to create more resource availability to support additional LFC tests Increase the number of LFC tests in order to gradually step into a multi-day scenario DAM will focus on the quality of the data submitted (deconstructed offer curves, more complete coverage of online generation with offer curves, accurate COPs) Provide more flexibility to address issues and refine Market Trials activities as needed Changes in Market Trials Activities 14Texas Nodal

15. Additional LFC testing will be added Week of 7/19 – 5-Hour Test Week of 8/02 – 24-Hour Test August will include 1 – 2 additional tests September will include 1 – 3 additional tests Additional tests will be confirmed no later than 2 weeks prior to the testing date Day Ahead Market (DAM) and Reliability Unit Commitment (RUC) Will be run for LFC Operational Dates during the weeks of LFC testing A focused input day will be included where MPs will submit trades, bids, offers and COPs that more representative of the post go-live market On non-LFC testing weeks: DAM and RUC will continue to run up to 5 times weekly Changes in Market Trials Activities 15Texas Nodal

16. August will remain our target for running any operational scenarios that have been added or need to be re-run Examples of scenarios that are being reviewed for inclusion are: Emergency Base Point (SCED Failure)SASM for Undeliverable AS / Failure to provide AS Manual Offset for SCEDSASM for ERCOT Load Increase, DCS EventHRUC / DRUC Failure and Timeline Deviation EEA EventCapacity Shortage Intra-day and Real Time DC Tie at max import tripsFrequency excursion high Settlements and Credit will continue to run daily and produce normal outputs taking into account the revised Market Trials activities (e.g. no DAM settlements on non-DAM dates) CRR and Outage Scheduling activities remain unchanged and will align with the communicated go-live transition plans (note that ERCOT will consolidate these transition plans into a Cutover Handbook to be published and reviewed at the Market Readiness Seminar (MRS) #5 on 7/28/2010) Changes in Market Trials Activities 16Texas Nodal

17. http://nodal.ercot.com 17 5-Hour LFC Test

18. http://nodal.ercot.com 5-Hour LFC Test Prior to the Test Provide Real Time ICCP Data to Nodal Make sure all Generation Resources are ready to participate in the test Market Notices: –A Market Notice will be sent July 12 to confirm the upcoming 5-Hour LFC test scheduled for July 20-22 –A follow-up Market Notice will be sent two days prior to the actual test to confirm the specific date –A final Market Notice will be sent on the day of the test to confirm that the test will be conducted that day On the day of the test, a hotline call will be made to communicate the start time of the test (approximately 2-3 hours prior to start) A WebEx conference will be provided to allow Market Participants to monitor the LFC Test —an email with WebEx details will be sent to Nodal Transition Project Managers the week of the test ERCOT and Market Participant staff should be available and ready to field troubleshooting calls during the 2-3 hours prior to the test A System Wide VDI will be issued immediately prior to the start of the test

19. 5-Hour LFC Test Support from the Market Participants Each MP needs to have their experts on hand during normal business hours (8:00 am – 5:00 pm) each business day during the week of the test During the day of the test, the hours of support will be extended to 7:00 am – 6:00 pm ERCOT staff will be contacting MPs during these hours as necessary in preparation for the test These experts must be able to support: –ICCP –EOCs, Inc/Dec Offers, and Output Schedules –LFC MPs should ensure that that their contact list is up to date http://nodal.ercot.com

20. 5-Hour LFC Test Manual dispatch instructions during the LFC test Beginning two hours prior to the LFC test, ERCOT will stop using OC1s and OOMEs and plans to use OC3s to manage congestion –The one exception to this is that ERCOT will use OC1s for the W-N and the N-H stability limit (non-thermal IROL for NERC) during transition periods to and from Nodal control –ERCOT has created and tested constraints for these limits in the Nodal system which can be activated for SCED as needed and should provide similar dispatch to the OC1s ERCOT may be required to use Zonal manual dispatch instructions to solve congestion ERCOT will set the Nodal Base-Point to match the Zonal manual dispatch instruction The QSE will continue to follow the Nodal Base Point if they are still under Nodal control

21. http://nodal.ercot.com 21 5-Hour LFC Test Market Participant EMS Wind Unit Data Note Set Real-Time telemetered HSL value to current MW output per (NP 6.5.5.2(3)) Additional detail was added to this protocol reference as part of NPRR 214NPRR 214 If the Wind-Powered Generation Resource (WGR) is not being curtailed, the HSL should be set at the actual net output of the WGR In event of curtailment (i.e., a SCED instruction at least two MW lower than the unit’s current MW output), the HSL should be set at the capability that the facility would have if it were not being curtailed This estimate should be based on wind speed, power curves, and turbine availability The QSE shall set the HSL within one SCADA cycle after receiving a SCED Base Point Dispatch Instruction from ERCOT This will allow the QSE to more easily detect if the WGR must respond to a curtailment instruction

22. http://nodal.ercot.com 22 5-Hour LFC Test RSTs to be used during Ramp-Up / Ramp-Down RST during Ramp-Up: Between 0 MW and LSL, the telemetered RST should indicate online status SCED will dispatch the Resource to its current output Between LSL and HSL, the telemetered RST should reflect unit activity per the Resource Status Codes provided in the Nodal Protocols RST during Ramp-Down (to OFF): Use RST of “OFF” to take unit out of pool of Resources available for economic dispatch by SCED This method is being suggested for purposes of LFC Testing and may not be the method used for nodal market go-live RLC will set HDL/LDL that it passes to SCED such that the Resource will be ramped offline

23. http://nodal.ercot.com 5-Hour LFC Test Practice submittal – Submit EOC reflecting Zonal/BES on July 14 The Curve Creator tool is posted on Readiness at http://nodal.ercot.com/readiness/markettrials/rtm/index.html http://nodal.ercot.com/readiness/markettrials/rtm/index.html Contact jgilbertson@ercot.com if intention is to submit Inc/Decjgilbertson@ercot.com

24. http://nodal.ercot.com 24 5-Hour LFC Test Requesting Updates to Nodal Contacts for 5-Hour LFC Test QSEs with Resources are requested to review their Nodal Contact information as previously submitted per the Contact Declaration Form and make any necessary changes for contacts who will be supporting ICCP, LFC, Market Data Submittals The current Nodal Contact Declaration Form v1.1 is available at http://nodal.ercot.com/readiness/rq/documents/index.html http://nodal.ercot.com/readiness/rq/documents/index.html Submit any updates or questions to nodalmarkettransition@ercot.com by 12:00pm on July 16, 2010nodalmarkettransition@ercot.com In addition, please ensure that the contact information for your Real-Time desk is accurate so that the ERCOT Control Room can contact you as needed during the 5-Hour LFC Test

25. http://nodal.ercot.com 25 5-Hour LFC Test Reminders Fixes to address Shift Factor issues as discussed at NATF and TAC will be in the nodal production environment in time to support the 5-Hour LFC Test During the 5-Hour LFC Test, ERCOT is recommending that no system tuning be performed by either ERCOT or Market Participants No Operational Scenarios are planned for the 5-Hour LFC Test July 14 is the final practice day for EOC submissions prior to the 5-Hour LFC Test Updates to Nodal Contacts are due by 12pm on July 16, 2010 The detailed LFC Workshop Presentation is available on the July 9 Market Trials meeting page at http://www.ercot.com/calendar/2010/07/20100709-MThttp://www.ercot.com/calendar/2010/07/20100709-MT

26. http://nodal.ercot.com 26 8-Hour LFC Test Results

27. 8-Hour LFC Test (June 17, 2010) Test ActivitiesApprox Timeline Market WebEx start7:00 AM ERCOT - MP pre-test troubleshooting period7:00 AM – 10:00 AM Test start10:00 AM Zonal-Nodal cutover10:00 AM – 10:46 AM System frequency controlled by nodal systems10:46 AM – 5:10 PM RRS Scenario2:15 PM – 2:25 PM EMBP Scenario3:00 PM – 3:20 PM Nodal-Zonal cutover5:10 PM – 5:42 PM

28. http://nodal.ercot.com 28 8-Hour LFC Test Results Active Constraints Time START Time END LOG BOOK LOG TYPE COMMENTS 08:1800:00 Transmission Security OC1 Activated the W/N OC-1 for the W/N stability limit at 86% of its 2312 limit and rising. For IE 08:45. MIS # Activated the W/N OC-1 for the W/N stability limit at 86% of its 2314 limit and rising. For IE 0115. MIS # 16062010004930. 09:5200:00 Transmission Security OC3 Activated OC3 for contingency SMDOPHR5, loss of the Meadow Sub to PH Robinson 345 KV line overloads the Hastings to North Alvin 138 KV line at 102% of its 190 MVA rating. 11:4900:00 Transmission Security OC3 Activated OC3 DRNKW_D5, loss of double circuit Roanoke Switch to West Denton & Lewisville Switch 138 KV line overloads the W_Dent to Fort Worth 138 KV line at 112% of its 218 MVA rating. 12:2600:00 Transmission Security OC3De-activated OC3 SMDOPHR5 in Zonal. 12:5100:00 Transmission Security OC3 Activated OC3 SABMBLU5 for contingency overload of Nicole/OAKC 138 kv line at 102% of a 179 mva rating on loss of ABMB/BLUF_CRK 345 kv line.

29. http://nodal.ercot.com 29 8-Hour LFC Test Results Active Constraints (continued) Time START Time END LOG BOOK LOG TYPE COMMENTS 12:5600:00 Transmission Security OC3 Activated OC3 DSHREXP8, loss of double circuit Sherry Switch to Handley & Executive Pkwy138 KV line overloads the Sherry Sw to Park Row 138 KV line at 103% of its 210 MVA rating. 14:2400:00 Transmission Security OC1 West/North OC1 now being used to control West/North CSC at 85% of a 2439 mw limit. 14:2800:00 Transmission Security OC3 Activated OC3 DGRSPKR5, loss of double circuit Graham SES to Parker Switch 345 KV line overloads the Graham to Jacksboro Sw 345 KV line at 112% of its 1152 MVA rating. 14:5400:00 Transmission Security OC3 Activated OC3 SJACREN8, loss of Jack Country to Reno 138kv line overloads the Rhome to Decator Tap 138 KV line at 102% of its 135 MVA rating. 16:0000:00 Transmission Security OC1De-activated West/North OC1 16:0100:00 Transmission Security OC3De-activated DRNKW_D5.

30. http://nodal.ercot.com 30 8-Hour LFC Test Results Active Constraints (continued) Time START Time END LOG BOOKLOG TYPECOMMENTS 17:2900:00 Transmission Security OC1 Activated W/N OC-1 due to W/N at 84% of its 2398 limit and climbing. For the Contingency loss of the GRSES_LNCRK over loads the Paint Creek to Murry TU 138kV line. For IE 1800. 18:0000:00 Transmission Security OC3 Continued the OC3 for the contingency loss of the Jack County to Reno 138kv will overload the Rhome to Decatur Tap 138kv.. this is carried over from the switch from Nodal back to Zonal system control. 20:0900:00 Transmission Security OC1 De-activated W/N OC-1 due to W/N at 84% of its 2398 limit and dropping. For the Contingency loss of the GRSES_LNCRK over loads the Paint Creek to Murry TU 138kV line. For IE 2045. 08:1900:00 Transmission Security NODAL operating constraint Activated the W/N OC-1 for the W/N stability limit at 86% of its 2312 limit and rising. For IE 08:45. MIS # Activated the W/N OC-1 for the W/N stability limit at 86% of its 2314 limit and rising. For IE 0115. MIS # 16062010004930

31. http://nodal.ercot.com 31 8-Hour LFC Test Results Active Constraints (continued) Time START Time END LOG BOOKLOG TYPECOMMENTS 09:5400:00 Transmission Security NODAL operating constraint Activated OC3 SMDOPHR5 in the Nodal. 11:4800:00 Transmission Security NODAL operating constraint Activated constraint DRNKW_D5, loss of double circuit Roanoke Switch to West Denton & Lewisville Switch 138 KV line overloads the W_Dent to Fort Worth 138 KV line at 112% of its 218 MVA rating. 12:2600:00 Transmission Security NODAL operating constraint De-activated OC3 SMDOPHR5 in Nodal. 12:5600:00 Transmission Security NODAL operating constraint Activated OC3 SABMBLU5 in Nodal. 13:0400:00 Transmission Security NODAL operating constraint Activated OC3 DSHREXP8 in Nodal. 14:3600:00 Transmission Security NODAL operating constraint Activated OC3 DGRSPKR5-Zonal ID, DGRSBNB5- Nodal ID

32. http://nodal.ercot.com 32 8-Hour LFC Test Results Active Constraints (continued) Time START Time END LOG BOOKLOG TYPECOMMENTS 14:5500:00 Transmission Security NODAL operating constraint Activated OC3 SJACREN8 in Nodal. 16:0100:00 Transmission Security NODAL operating constraint De-activated West/North base case. 16:0300:00 Transmission Security NODAL operating constraint De-activated constraint DRNKW_5.

33. http://nodal.ercot.com 33 8-Hour LFC Test Results

34. http://nodal.ercot.com 34 8-Hour LFC Test Results Frequency

35. http://nodal.ercot.com 35 8-Hour LFC Test Results CPS1 Score CPS1 Score (1 Min.) Average All in Zonal (900-1003)163.92 Transition to Nodal (1004-1045)107.49 All in Nodal (1046-1708)119.29 Final Hour of Testing (16:08-17:08)146.35 Transition to Zonal (1709-1738)128.70 All in Zonal (1739-2100)147.18 CPS1 During the 6/17/2010 8-Hour LFC Test:

36. http://nodal.ercot.com 36 8-Hour LFC Test Results Nodal Generation to Be Dispatched and Load

37. http://nodal.ercot.com 37 8-Hour LFC Test Results Regulation and System Load

38. http://nodal.ercot.com 38 8-Hour LFC Test Results Regulation and System Frequency

39. http://nodal.ercot.com 39 8-Hour LFC Test Results ERCOT Wind Generation

40. http://nodal.ercot.com 40 8-Hour LFC Test Results Operational Scenarios – Emergency Base Points

41. http://nodal.ercot.com 41 8-Hour LFC Test Results Operational Scenarios – RRS OPERATIONAL SCENARIO DURING 8 HOUR LFC TEST - RRS DEPLOYMENT RRS Total QSEs Update Time<= 60 secs Avg Time (secs) Min Time (Secs) Max Time (Secs) Received Deployment 14---- Deployment-13181224 Recall-1230.52436 Note: Average, Max. and Min times only calculated for QSEs that were able to update RRS Schedules in 60 seconds or less.

42. http://nodal.ercot.com 42 8-Hour LFC Test Results GREDP Statistics for Generators (Non-IRRs) % of Non-IRR Generation Resources that Met the Protocol Criteria All Resources82.59% Resources Providing Regulation86.11% Combined Cycle Resources79.31% Coal and Lignite Resources85.37% Diesel Resources100.00% Gas Steam (Non-Reheat Boiler) Resources75.00% Gas Steam (Reheat Boiler) Resources68.75% Gas Steam (Supercritical Boiler) Resources60.00% Hydro Resources71.43% Nuclear Resources100.00% Simple Cycle (Greater than 90 MW) Resources75.00% Simple Cycle (Less than 90 MW) Resources88.00%

43. http://nodal.ercot.com 43 8-Hour LFC Test Results GREDP Statistics for Generators (IRRs) Percent of IRRs that Met the Protocol Criteria 30.77% Number of IRRs that had an Interval for which GREDP was scored 26

44. http://nodal.ercot.com 44 8-Hour LFC Test Results

45. http://nodal.ercot.com 45 Q&A Q&A / Open Forum

46. http://nodal.ercot.com 46 Appendix A

47. 47Texas Nodal Review of 8-Hour LFC Update Presented to TAC July 1, 2010

48. Issues & Observations During the 8 Hour Test on June 17 th Issue/ ObservationTimeframeRoot CauseResolution Plan Frequency Drop 10:57amParameter setting (Balancing Authority ACE Limit ) was not providing the desired effect Subsequently turned off Confirm all parameter settings in all systems prior to each test SPR written for BAAL parameter Negative Load Zone Prices Load Zone, Hub, and Electrical Bus LMPs/SPPs incorrect when constraints binding or violated 11:30am - 2pmMissing Shift Factors for Electrical Buses affected SPP calculation EMS integration did not properly provide electrical bus shift factors WGRs became the marginal Resources because incorrect flag setting in EMS led ERCOT to not use the load distributed bus as the reference bus Telemetry changes created topology changes which changed the reference bus in EMS to be a be a bus in the west zone 3% Shift Factor heightened the issue The fix in EMS was migrated to nProd last Friday Set Shift Factor cut-off to a much smaller value such as.0001 Changed flag to be load distributed bus West – North Stability Limit was changing and varied from zonal 10:50am – 3:25pm Initially, lower W-N limit was entered in nodal to prevent W-N being binding in zonal Due to QSEs not following basepoints, the nodal and zonal W-N 80% limit was exceeded Leave OC1 in zonal during all transitions between nodal and zonal Once 100% Nodal take out OC1 in zonal. Constraints were ignored by SCED for 19 minutes 1:20pm - 1:39pm Shift factor transfer between EMS and MMS was not occurring The fix in EMS was migrated to nProd on Friday Resources not following base points and regulation 10am – 5pmMisunderstanding of test expectations Coordination of system tuning Provide feedback from tests moving forward Possible metric introduction and escalation Provide specific timeslots for tuning 48Texas Nodal

49. Issue #1 – Missing Shift Factors for Electrical Busses affected SPP calculation EMS integration did not properly provide electrical bus shift factors Load Zone, Hub, and Electrical Bus LMPs/SPPs incorrect when constraints binding or violated Issue introduced with EMS Bug Fix end of last year Issue #2 – Missing Shift Factors for constraints in SCED for brief period Shift Factor transfer from EMS to MMS from1320-1339 had issues Constraints were ignored by SCED for 19 minutes Dispatch closely monitored by Operators until resolved Issue introduced with EMS Bug fix in mid-May Issue #3 – Incorrect flag setting in EMS ERCOT did not use load distributed bus as the reference bus Telemetry changes created topology changes which lead to a bus in the west zone to be the reference bus Having 3% shift factor cut off caused several WGRs to have no shift factors on the constraint causing WGRs to be marginal Issues During the 8 Hour Test - ERCOT 49Texas Nodal

50. Issues during test for Market Participants Telemetry: Inconsistencies between JOU owners (e.g., telemetry, COP) Incorrect Ancillary Service values in telemetry for Resource Incorrect Resource Status Codes Incorrect HSL/LSL values telemetered Resource with nodal Output Schedule offering BES into zonal market Resources not following their nodal Base Points Resources not following regulation signals Zonal Resource Plans not in agreement with Nodal Issues During the 8 Hour Test – Market Participants 50Texas Nodal

51. Migrate fix to views that will resolve the issue with the Shift Factors not being available (Code migrated, still monitoring) Migrate fix to views that will resolve the issue with transferring an incomplete Shift Factor set (Code migrated, still monitoring) Use Distributed Load Bus as the Reference Bus instead of Single Reference Bus Set Shift Factor cut-off to a much smaller value such as.0001 More closely monitor Resources in how they are following their Base Points and provide feedback Confirm parameter settings prior to every test Leave OC1 in Zonal during transition. Once 100% Nodal, take out OC1 in Zonal. Bring the OC1 back at the start of transitioning back to Zonal Specific time slots for tuning for both Market Participants and ERCOT Next Steps – LFC Tests 51Texas Nodal

52. http://nodal.ercot.com 52 Appendix B

53. http://nodal.ercot.com 53 URLS and EMAIL ADDRESS FOR SUPPORT URLs for accessing the Nodal Production systems –MIS: https://mis.ercot.com/pps/tibco/mis/https://mis.ercot.com/pps/tibco/mis/ –Market Manager: https://mis.ercot.com/pps/tibco/mis/ Click the ‘Applications’ tab in the upper menu. Link is in the ERCOT Applications portlethttps://mis.ercot.com/pps/tibco/mis/ –CRR: https://mis.ercot.com/pps/tibco/mis/ Click the ‘Markets’ Link in the upper menu. Click CRR in the Market sub menuhttps://mis.ercot.com/pps/tibco/mis/ –EWS: https://misapi.ercot.com/2007-08/Nodal/eEDS/EWShttps://misapi.ercot.com/2007-08/Nodal/eEDS/EWS

54. http://nodal.ercot.com 54 Market Trials Handbooks –Available on the Readiness Center at the following links Real Time Market / LFC covering Phase http://nodal.ercot.com/readiness/markettrials/rtm/index.htmlhttp://nodal.ercot.com/readiness/markettrials/rtm/index.html Outage Scheduler covering Phase http://nodal.ercot.com/readiness/markettrials/os/index.htmlhttp://nodal.ercot.com/readiness/markettrials/os/index.html CRR covering release Phase http://nodal.ercot.com/readiness/markettrials/crr/index.htmlhttp://nodal.ercot.com/readiness/markettrials/crr/index.html Settlements / COMs covering Phase http://nodal.ercot.com/readiness/markettrials/coms/index.htmlhttp://nodal.ercot.com/readiness/markettrials/coms/index.html Day Ahead Market http://nodal.ercot.com/readiness/markettrials/dam/index.htmlhttp://nodal.ercot.com/readiness/markettrials/dam/index.html