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Market TrialsReal-Time Market / LFC

Weekly Update

April 23, 2010

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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.

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Agenda

• Antitrust Admonition

• Environment Report– Planned / unplanned outages – Known Issues

• Standing Reports and Updates– General reminders / updates– RTM / LFC Update– LFC Update: Status of Individual QSE Tests for LFC– Telemetry Outreach 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

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Environment Report: Planned / Unplanned Nodal Outages

• Planned Outages– Planned Outages

• 04/23/10 – 04/25/10 – ERCOT will be performing the initial release for Phase 5 on 4/23– Due to the size and complexity of the release, it will be necessary to take systems down

periodically throughout the outage period.– ERCOT will be running a series of test that Sunday which may result in notifications and / or

data in the Nodal Production systems that are associated with that test.

– Unplanned Outages• 04/20/10 08:00 A.M. – 04/21/2010 10:00 A.M.

– Links to the following resources were missing from MIS Portal during the reported period. Issue was attributable to a role synchronization problem between MIS and MPIM applications.

» Market Manager Application link» CRR Application Link» Certified Porlets associated with MMS and CRR applications (e.g. QSE Forecasts and

Load, Settlement statement and Invoice report etc)

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Environment Report: Known Issues

• New Real-Time Known Issues– EWS to MIR

• For EWS report Market Info: DynamicRatings and LMPs_RTM, the EWS responses fail when the duration of DynamicRatings is set to 3 hours and the duration of LMPS_RTM is set to 12 hours (error "java.net.SocketException: Connection reset")

– EDW• Report name in MIR is incorrect for NP6-584-Security Violations and Binding Transmission Constraints

– Expected name: Security Violations and Binding Transmission Constraints“– Actual name: Security Violations Summary

– CDR• A "Reason_for_Removal" column is being added to NP5-649: Temporarily Removed Contingencies to track

operator-entered reasons justifying the temporary removal of contingencies– EDW

• The SCED_TIMESTAMP and CA_EXE_TIME formats do not match the technical specification for the report NP6-584-Security Violations and Binding Transmission Constraints

– Specified format: MM/DD/YYYY HH:MIN:SS AM\PM– Actual format: Mar 24, 2010 3:30:36

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Environment Report: Known Issues

• New Real-Time Known Issues (continued)– EMS

• Text descriptions for EMS system-generated notices are being updated in the EIP External Interfaces Specification

– The text description in EMS notices do not always match the text descriptions provided in the EIP External Interfaces Specification (Section 5.3.1.2, EMS System-Generated Notices)

– The text descriptions in the EIP External Interfaces Specification are being updated to match the EMS system-generated notices and will be provided in a future publication

– The EMS “-RETURN” notice will also be included in the updates

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Environment Report: Known Issues

• Closed Real-Time Known Issues– MMS MI EVNT

• OPERATING_HOUR_CLOSE and ADJ_WINDOW_CLOSE events are several minutes late

– The messages stating that the Operating Hour has closed and the Adjustment Period has closed are not being sent at the top of the hour, but are often coming out a minute or two late. This also means that submission deadlines are enforced a minute or two late.

– MMS• EMS data is causing a large number of DAM-DSRLDTEL-NOTF messages

– Under certain conditions, DAM-DSRLDTEL-NOTF messages stating that DSR telemetry has been lost for more than 15 minutes are currently being sent to all QSEs whether or not they have DSR telemetry configured. This message should only be sent to QSEs that have DSR telemetry configured and the signal has dropped.

– MMS SCED• Managing Minos (SCED Optimization Engine) errors

– Closed defect discovered March 10 where SCED Step Two failed and Base Points/LMPs were distributed based on SCED Step One results.

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Environment Report: Known Issues

• Closed Real-Time Known Issues (continued)– MMS UI

• Cancelling for hour 3 on DST short day does not work– "When using the UI, if an attempt is made to cancel with hour 3 selected for either Start Hour or End

Hour, the request fails and yields an error message, ""Invalid Start (End) Hour 3 due to Daylight Savings Transition."“

– MMS MM• MMS MM assumes first role retrieved through MPIM

– When more than one MMS role is assigned to a user, the MMS UI is assigning just one role which may or may not be the appropriate one. Certs should only have one MMS role assigned. The defect fix will pick the most restrictive role if more than one is encountered.

– MMS MM• The MMS UI does does not highlight the correct error area on client-side validation for Create/Update TPO

– "Highlighting Error 1:If any value except EOC Price is left empty on a TPO submission, then upon submitting/updating that TPO the UI states to correct the entries highlighted in orange--but only ""Hot Start-Up"" is highlighted. This highlighting is only correct when the Hot Start-Up is left empty.Highlighting Error 2:If EOC Price is left empty, nothing happens after pressing the update button. The EOC price should be highlighted and the ""correct the entries"" message should be displayed."

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Standing Reports and Updates: General Reminders / Updates

• Real-Time Known Issues List– The Updated Real-Time Known Issues List posted April 22 to the Readiness Center

(http://nodal.ercot.com/readiness/markettrials/rtm/index.html).

• Network Model Update– The current system loaded from the model 4/14/10– Next scheduled load is 5/3/10

• Nodal Market Readiness Seminar #4 is scheduled for May 25, 2010 – See meeting details in April 21 Market Notice or online at

http://www.ercot.com/calendar/2010/05/20100525-MT

• Nodal Readiness Scorecard– The scorecard was updated on the Readiness Center April 21 (

http://nodal.ercot.com/readiness/scorecard/index.html) (see April 21 Market Notice)

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Standing Reports and Updates: General Reminders / Updates

• Changes to Market Call Schedule:– Beginning May 7, the times the market call schedule will change as follows:

• 09:00 AM - 09:30 AM Outage Scheduling• 09:30 AM - 10:00 AM Congestion Revenue Rights• 10:00 AM - 11:00 AM Day Ahead Market / RUC / SASM• 11:00 AM - 12:00 PM Real Time Market / LFC • 12:00 PM - 01:00 PM Break• 01:00 PM - 02:00 PM COMS/Settlements

– WebEx Details will be posted at: http://www.ercot.com/committees/nodal/mt/

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Standing Reports and Updates: General Reminders / Updates

• There are four Unit Parameters that are part of the ERCOT’s AGC system that will significantly affect ERCOT’s deployments and protocol reporting

– Unit Offline Limit (%)• This is a percent of Unit Max Capability below which the unit is designated

OFFLINE– Unit Online Deadband (%)

• This is the dead band that is used to determine if a unit which was previously Offline, became online. The unit MW should be more than the Unit Offline Limit(1 + Unit Online DB % /100) to be considered online

– Frequency Deviation Deadband (HZ) and Frequency Bias• These values are used to calculate Average Estimated Governor Response

• It is important that these values be provided by Resource Entities– The frequency deviation deadband and frequency bias must be provided to ERCOT

by the Resource Entity per Nodal Protocol 8.1.1.4.1(2)• ERCOT will begin working with Market Participants to collect these parameters for use in

ERCOT systems• This topic will be scheduled for discussion at the May 4 NATF meeting

05/04/23

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Real Time Market / LFC Update

Real Time Market / LFC Update

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SCED Week 12• -$270 to $620 during binding constraint on Monday 07:25-08:15 (Austin-Sandow); no $2250!• One second PI error on 4/16 (ignore)

Real Time Market / LFC Update

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SCED Week 12• West-to-North constraint binding on Wednesday 4/21 10:45-11:00 and 20:10 – 23:45 (intermittent)

Missed MIS LMP Reports

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• 3 reports missed and reposted• 4/17 interval missed due to EMS failover test• 4/20 interval missed due to trigger not received by CDR• 4/21 interval missed due to lack of MMS trigger

4/17/2010 10:354/20/2010 17:304/21/2010 12:35

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LFC Update: Status of Individual QSE Tests for LFC

LFC Calendar Status• 76 QSEs/Sub-QSEs are currently targeted for Individual QSE tests• 70 have scheduled a test window (98.6% of Generation)• 50 QSE/Sub-QSEs have completed testing (89.29% of Generation):

• The updated LFC Calendar was posted April 22 to the Readiness Center at http://nodal.ercot.com/readiness/markettrials/rtm/index.html

• Submit questions regarding the LFC Calendar to markettrials@ercot.com

AEN DIRECT FPL_KEIR MORGAN_SQ4 OPTIMENERGYSQ1AENSQ1 DIRECTSQ2 INVENER_CMPSQ1 MP2 ENERGY OXY

AEPC EAGLE INVENER_CMPSQ2 NEXTERA PSEG_SQ1AEPSQ3 EAGLE_SQ4 INVENERGYSQ4 NEXTERA_SQ1 PSEG_SQ2BRAZOS EC_AND_R_SQ1 J_ARONSQ1 NEXTERA_SQ2 RIONGLBTUQSE EC_AND_R_SQ2 LCRA NEXTERA_SQ3 STECCALPINE EC_AND_R_SQ4 LUMINANT NEXTERA_SQ4 STEC_SQ2

CONSTELLATION EC_AND_R_SQ5 LUMINANTSQ1 NRG_SQ1 TENASKACPS EC_AND_R_SQ6 LUMINANTSQ2 NRG_TEXAS TRQ1_SQ1

CPSSQ1 FORMOSA MORGAN_SQ3 OPTIM_ENERGY TRQ4_SQ4

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LFC Update: Status of Individual QSE Tests for LFC

Upcoming LFC QSE Tests• Upcoming QSE LFC Tests through April 30:• 4/23/2010BP (SQ1)• 4/26/2010GPL / GPL (SQ2)• 4/27/2010BARTON CHAPEL - Communication Only • 4/28/2010ANP (QSE) / IPA (SQ1)• 4/29/2010SHELL (QSE & SQ2)

Available Test windows through May 7Date Morning Afternoon

4/26/2010 unavailable 1pm-4pm4/27/2010 9am-12pm unavailable4/28/2010 9am-12pm unavailable4/29/2010 9am-12pm unavailable4/30/2010 9am-12pm 1pm-4pm5/3/2010 unavailable unavailable5/4/2010 9am-12pm unavailable5/5/2010 unavailable 1pm-4pm5/6/2010 9am-12pm 1pm-4pm5/7/2010 9am-12pm 1pm-4pm

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LFC Update: Upcoming Key Dates

Upcoming Key Dates for LFC• April 19 - May 7 – Re-testing period for individual QSE LFC tests• Week of May 3 – 2-Hour LFC Test Workshop– The date/time of the workshop will be announced via Market Notice next week• Week of May 17 – Conduct 2-Hr Test– Currently targeting May 19, 20, or 21

2-Hour LFC Test Approach Document• The 2-Hour LFC Test Approach document and related artifacts are posted on

the Readiness Center at http://nodal.ercot.com/readiness/markettrials/rtm/index.html

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State Estimator Convergence Update

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

Month Day % Convergence (Including Solved w/ Mismatch)

APR 12 97.71

APR 13 97.27

APR 14 99.32

APR 15 97.59

APR 16 97.89

APR 17 99.65

APR 18 99.65

APR 19 99.30

APR 20 99.66

APR 21 98.65

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State Estimator Convergence Update

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Q&A

Q&A / Open Forum

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Appendix

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URLS and EMAIL ADDRESS FOR SUPPORT

• URLs for access 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

• Reminder: Market Trials email address change: ERCOT asks that MPs use the markettrials@ercot.com email address for questions from this point forward– This will begin the phasing out of eds2@ercot.com, eds3@ercot.com and

eds4@ercot.com email addresses.– A centralized address will no longer require MPs to “guess” which email

address to use for their questions– We have implemented a more effective method of routing and responding to

emails using this address– The old eds emails can continue to be used until 2009 hold over efforts are

completed (such as telemetry outreach)

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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