Market Trials Real-Time Market / LFC

http://nodal.ercot.com 1

Market TrialsReal-Time Market / LFC

Weekly Update

July 2, 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– LFC Testing Update– State Estimator Convergence Statistics

• 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

Market Trials 2010 Roadmap



Environment Report: Planned / Unplanned Nodal Outages

Planned Outages

– 07/02/2010 6:00 P.M. – 11:00 P.M.

• Database maintenance activities are planned during this period and will affect availability of following application services:

– EWS ( Web Services)

– MM UI

Unplanned Outages

– 06/29/2010 12:10 P.M. – 12:45 P.M.

• Users were unable to launch MM UI & CRR applications via the MIS portal due to a script failure.


Known Issues

Recently Opened Issues• NP8-541-Monthly Responsive Reserve Performance Report (Certified Report)

– Report is failing with the error message

– Affects EDW

• Hyperlink typos on MIS

– MIS Other Binding Documents QSE Application to Provide Balancing Energy Service Bids (need to add “Service Bids” to the hyperlink text)

– MIS Grid Generation Reliability Must Run "Reliabilitiy Must Run Criteria“ (the word “Reliability” has an extra “i” in it)

Recently Close Issues• NP4-159-Load Forecast Distribution Factors (MIS Secure Report)

– Duplicate hours were in the report output for last day of the report range

• This report provides hourly data for the next seven days—the hourly data is being duplicated for each hour of the seventh day

– Affected CDR


Standing Reports and Updates: General Reminders / Updates

Reminders/Updates

• Network Model Update

– The current system loaded from the model 07/01/10

– Next scheduled load is 07/14/10

• EMS Alerts

– ERCOT will be testing EMS alerts on Tues. and Thurs. of each week, 10 – 11am

– Submit any questions to [email protected]

• 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



Reminders/Updates

• 168-Hour Test Handbook

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

• No kick-off call on 7/05/10

– There will not be a Market Trials weekly kick-off call on 7/05/10 due to the holiday

• 5-Hour LFC Workshop

– Scheduled during the Friday Real-Time Market call on July 9

– Market Notice will go out to announce this later today

– Majority of workshop will focus on a discussion of results from the 8-Hour LFC test

• 8-Hour LFC Test Results

– To be discussed during 5-Hour LFC Workshop on July 9

– Individual GREDP results to be distributed Week of July 05



Reminders/Updates• Artifact Updates

– The following updated artifacts will deploy overnight to the Readiness Center at http://nodal.ercot.com/readiness/markettrials/rtm/index.html:

• Real-Time Known Issues List• SPP and RTRMPR Issues Tracking

– Real-Time Market/LFC Market Trials Handbook– Will be updated week of 7/05/10 to reflect new Full-System/LFC

testing dates – Full-System/LFC Testing Approach

• The current battery of LFC Test Approach documents will be consolidated into a single approach document to be used for the Full-System/LFC tests that will be conducted through the end of Market Trials

• The consolidated approach document is schedule to post to the Readiness Center the week of 7/05/10

• A Market Notice will be sent when this document becomes available for download

04/19/23


Real Time Market / LFC Update



SCED Week 22•SL at $2250 offer cap for 104 intervals•SL at $3001 power balance constraint SP for two intervals on 6/29 13:05 and 13:15

• During constraint transfer test•Wednesday (deconstructed zonal curves) looks good



SCED Week 22• System Lambda is LMP that would result if location does not affect any constraint• Generally between $30 and $60; 6/30 prices even lower

• Lower Generation Requirement and Zonal equivalent EOC

30000

35000

40000

45000

50000

55000

60000

0

10

20

30

40

50

60

70

80

90

100

6/24 6/25 6/26 6/27 6/28 6/29 6/30 7/1

MW

LMP

Date

System Lambda and Generation Requirement(price spikes removed)

SYSTEM_LAMBDA

GEN_REQ



SCED Week 22ThursdayConstraint 138_NAL_HAS_1, Contingency SMDOPHR5 (between 00:00 and 18:10 for 29 SCED runs)Constraint 931_C_1, Contingency DWTRWLV5 (between 09:30 and 14:30 for 34 SCED runs)Constraint N_SHARPE_PS1, Contingency DB_DAIR8 (between 13:00 and 23:45 for 32 SCED runs)

FridayConstraint AIRLIN_CABANI1_1, Contingency DB_DAIR8 (between 12:05 and 12:25 for 5 SCED runs)Constraint ALAZAN_B_DAVI1_1, Contingency SLONN_S5 (between 12:55 and 13:10 for 4 SCED runs)

SaturdayConstraint 138_NAL_HAS_1, Contingency SMDOPHR5 (between 09:50 and 19:25 for 76 SCED runs)Constraint 1660__A, Contingency DAUSSND5 (between 01:25 and 09:50 for 84 SCED runs)

SundayConstraint 138_NAL_HAS_1, Contingency SMDOPHR5 (between 15:40 and 22:05 for 79 SCED runs)Constraint 6009__A, Contingency DGRSBNB5 (between 19:35 and 21:55 for 34 SCED runs)Constraint 930__A, Contingency SCDHDES8 (between 13:30 and 19:55 for 67 SCED runs)

MondayConstraint 1660__A, Contingency DHUTGIL8 (between 18:00 and 23:40 for 32 SCED runs)Constraint N_SHARPE_PS1, Contingency SLONN_S5 (between 11:30 and 23:45 for 54 SCED runs)



SCED Week 22

TuesdayConstraint 138_NAL_HAS_1, Contingency SMDOPHR5 (between 11:05 and 19:15 for 34 SCED runs)Constraint 1660__A, Contingency SGILHUT8 (between 11:25 and 11:51 for 5 SCED runs)Constraint 203T260_1, Contingency DAUSSND5 (between 11:45 and 13:55 for 4 SCED runs)Constraint 260_A_1, Contingency DGIBSNG5 (between 11:25 and 11:51 for 7 SCED runs)Constraint 39T188_1, Contingency DFERCOR8 (at 12:10 for 1 SCED run), Constraint 95T302_1, Contingency DMARELM5 (between 13:50 and 14:00 for 4 SCED runs)Constraint ALAZAN_B_DAVI1_1, Contingency SLONWHI5 (between 12:25 and 12:45 for 5 SCED runs)Constraint FAYETT_6AT2, Contingency DAUSLOS5 (between 12:15 and 12:35 for 3 SCED runs)Constraint MARION_4AT2, Contingency DELMSKY5 (between 12:55 and 14:10 for 17 SCED runs)Constraint N_TO_H, Contingency BASECASE (between 11:15 and 17:05 for 75 SCED runs)Constraint N_TO_S, Contingency BASECASE (between 13:04 and 14:10 for 5 SCED runs)Constraint VALIMP, Contingency BASECASE (between 12:20 and 14:25 for 37 SCED runs),Constraint W_TO_N, Contingency BASECASE (between 14:40 and 15:00 for 7 SCED runs)

WednesdayConstraint 138_ALV_NAL_1, Contingency SMDOPHR5 (between 11:40 and 16:15 for 25 SCED runs)Constraint 138_NAL_HAS_1, Contingency SMDOPHR5 (between 13:50 and 23:55 for 36 SCED runs)Constraint 1650_A_1, Contingency DFMRMNS5 (between 12:05 and 12:15 for 2 SCED runs)Constraint 1660__A, Contingency DJEWSNG5 (between 15:10 and 16:15 for 12 SCED runs)Constraint N_SHARPE_PS1, Contingency DB_DAIR8 (between 13:00 and 16:05 for 37 SCED runs)


LFC Testing Update

ERCOT operational perspective

•The switching of control between systems went smoothly

•Frequency was controlled for duration of test by nodal systems

•Planned operational scenarios were executed as planned

•CPS1 scores were passing except for one hour

•ERCOT Operators able to manage numerous active constraints with SCED

Results of the 8 Hour Test

1 July 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 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

• 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

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

1 July 2010

• 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

• Tentatively schedule 6 LFC tests through September

• 5 Hour LFC test scheduled the week of July 19th

• 24 Hour LFC (noon to noon) scheduled the week of the August 2nd

• 2 additional tests in August

• 2 tests in September (after 168-Hour Test)

Next Steps – LFC Test Schedule


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 21 99.28

JUN 22 98.96

JUN 23 98.61

JUN 24 98.27

JUN 25 97.89

JUN 26 97.25

JUN 27 97.24

JUN 28 92.2

JUN 29 96.42

JUN 30 98.04


State Estimator Convergence Update


Q&A

Q&A / Open Forum


Appendix


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

LFC – Test Overview & Setup: Quick Start Resources

• Deployment of Balancing Energy Service (BES) Capable NSRS for Quick Start resources during the LFC test

– Prior to the resource being asked to come online in Zonal, the QSE should:• telemeter a Non-Spin Schedule and Responsibility (NSSC and NSRS) of 0• telemeter a resource status showing the resource as offline; and• telemeter an LSL of 0

– If the QSE receives an energy deployment in Zonal, the QSE should start that resource and telemeter a resource status of online (ON) as soon as they are capable

– Once the resource is “ON” with net MW > 0, the resource will be available for SCED dispatch and the resource will be dispatched based on the energy offer curve

– After the resource reaches it’s physical LSL, the QSE should reflect that value through the telemetered LSL and should leave it at that value

– Once Zonal indicates that the resource should go offline, the resource should begin ramping down

– When the resource goes offline, the QSE should update the telemetered resource status to offline and then change the telemetered LSL to 0

• The QSE also has the option to not provide BES-Capable NSRS during the hours of the test

LFC – Test Overview & Setup: Congestion Management

• 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 continue to use OC1s for the W-N stability limit (non-thermal IROL for NERC)

• ERCOT has created and tested a constraint for this limit 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

Market Trials Real-Time Market / LFC

Documents

Transcript of Market Trials Real-Time Market / LFC