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

http://nodal.ercot.com 1

Market TrialsReal-Time Market / LFC

Weekly Update

July 9, 2010


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.


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


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


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


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

• 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 19th. 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 [email protected]

• 168-Hour Test Handbook

– Posted on the Readiness Center at http://nodal.ercot.com/readiness/markettrials/index.html


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• 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

04/19/23


Real Time Market / LFC Update

Real Time Market / LFC Update


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


State Estimator Convergence


State Estimator Convergence Update

State Estimator Daily Convergence Statistics(these percentages are graphed in the next slide)

Month Day % Convergence (Including Solved w/ Mismatch)

JUN 28 92.2

JUN 29 96.42

JUN 30 98.04

JUL 1 98.02

JUL 2 99

JUL 3 99.31

JUL 4 96.23

JUL 5 100


State Estimator Convergence Update

13 Texas Nodal

Changes in Market Trials Activities

Scott Middleton

• 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


14 Texas Nodal

• 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


15 Texas Nodal

• 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 SCED SASM for ERCOT Load Increase,

DCS Event HRUC / DRUC Failure and Timeline Deviation

EEA Event Capacity Shortage Intra-day and Real Time

DC Tie at max import trips Frequency 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)


16 Texas Nodal


5-Hour LFC Test

5-Hour LFC Test

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

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


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


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 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


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


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• Contact [email protected] if intention is to submit Inc/Dec


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

• Submit any updates or questions to [email protected] by 12:00pm on July 16, 2010

• 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


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-MT


8-Hour LFC Test Results



8-Hour LFC Test (June 17, 2010)

Test Activities Approx Timeline

Market WebEx start 7:00 AM

ERCOT - MP pre-test troubleshooting period 7:00 AM – 10:00 AM

Test start 10:00 AM

Zonal-Nodal cutover 10:00 AM – 10:46 AM

System frequency controlled by nodal systems 10:46 AM – 5:10 PM

RRS Scenario 2:15 PM – 2:25 PM

EMBP Scenario 3:00 PM – 3:20 PM

Nodal-Zonal cutover 5:10 PM – 5:42 PM



Active Constraints

Time START

Time END

LOG BOOKLOG TYPE

COMMENTS

08:18 00:00Transmission 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.


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.


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.


OC3 De-activated OC3 SMDOPHR5 in Zonal.


OC3Activated 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.



Active Constraints (continued)

Time START

Time END

LOG BOOKLOG TYPE

COMMENTS


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.


OC1West/North OC1 now being used to control West/North CSC at 85% of a 2439 mw limit.


OC3Activated 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.


OC3Activated 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.


OC1 De-activated West/North OC1


OC3 De-activated DRNKW_D5.




Time START

Time END

LOG BOOK LOG TYPE COMMENTS


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.


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.


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.


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




Time START

Time END




Activated OC3 SMDOPHR5 in the Nodal.



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.



De-activated OC3 SMDOPHR5 in Nodal.



Activated OC3 SABMBLU5 in Nodal.



Activated OC3 DSHREXP8 in Nodal.



Activated OC3 DGRSPKR5-Zonal ID, DGRSBNB5-Nodal ID




Time START

Time END




Activated OC3 SJACREN8 in Nodal.



De-activated West/North base case.



De-activated constraint DRNKW_5.



Frequency



CPS1 Score

CPS1 Score (1 Min.) AverageAll in Zonal (900-1003) 163.92

Transition to Nodal (1004-1045) 107.49All in Nodal (1046-1708) 119.29

Final Hour of Testing (16:08-17:08) 146.35Transition to Zonal (1709-1738) 128.70

All in Zonal (1739-2100) 147.18CPS1 During the 6/17/2010 8-Hour LFC Test:



Nodal Generation to Be Dispatched and Load



Regulation and System Load



Regulation and System Frequency



ERCOT Wind Generation



Operational Scenarios – Emergency Base Points



Operational Scenarios – RRS

OPERATIONAL SCENARIO DURING 8 HOUR LFC TEST - RRS DEPLOYMENT

RRSTotal QSEs

Update Time<= 60 secs

Avg Time (secs)

Min Time (Secs)

Max Time (Secs)

Received Deployment

14 - - - -

Deployment - 13 18 12 24

Recall - 12 30.5 24 36

Note: Average, Max. and Min times only calculated for QSEs that were able to update RRS Schedules in 60 seconds or less.



GREDP Statistics for Generators (Non-IRRs) % of Non-IRR Generation Resources that Met the

Protocol CriteriaAll Resources 82.59%

Resources Providing Regulation 86.11%

Combined Cycle Resources 79.31%

Coal and Lignite Resources 85.37%

Diesel Resources 100.00%

Gas Steam (Non-Reheat Boiler) Resources 75.00%

Gas Steam (Reheat Boiler) Resources 68.75%

Gas Steam (Supercritical Boiler) Resources 60.00%

Hydro Resources 71.43%

Nuclear Resources 100.00%

Simple Cycle (Greater than 90 MW) Resources 75.00%

Simple Cycle (Less than 90 MW) Resources 88.00%



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


Q&A

Q&A / Open Forum


Appendix A

47 Texas Nodal

Review of 8-Hour LFC Update

Presented to TAC July 1, 2010

Issues & Observations During the 8 Hour Test on June 17th

Issue/ Observation Timeframe Root Cause Resolution Plan

Frequency Drop 10:57am • Parameter 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 - 2pm • Missing 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 – 5pm • Misunderstanding of test expectations• Coordination of system tuning

• Provide feedback from tests moving forward• Possible metric introduction and escalation• Provide specific timeslots for tuning

48 Texas Nodal

• 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

49 Texas Nodal

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

50 Texas Nodal

• 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

51 Texas Nodal


Appendix B


URLS and EMAIL ADDRESS FOR SUPPORT

• URLs for accessing the Nodal Production systems

– 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 portlet

– CRR: https://mis.ercot.com/pps/tibco/mis/ Click the ‘Markets’ Link in the upper menu. Click CRR in the Market sub menu

– EWS: https://misapi.ercot.com/2007-08/Nodal/eEDS/EWS


Market Trials Handbooks

• 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.html

• Outage Scheduler covering Phase http://nodal.ercot.com/readiness/markettrials/os/index.html

• CRR covering release Phase http://nodal.ercot.com/readiness/markettrials/crr/index.html

• Settlements / COMs covering Phase http://nodal.ercot.com/readiness/markettrials/coms/index.html

• Day Ahead Market http://nodal.ercot.com/readiness/markettrials/dam/index.html

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

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