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Cutover Daily Call 10:30 AM

Cutover Daily Call 10:30 AM. November 23, 2010 10:30. Antitrust Admonition. ANTITRUST ADMONITION

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Cutover Daily Call 10:30 AM

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  1. Cutover Daily Call 10:30 AM November 23, 2010 10:30 http://nodal.ercot.com 1

  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. http://nodal.ercot.com 2

  3. Daily Call – 10:30 8 Days Until Go-Live • General Updates / Reminder • ERCOT will remove the Market Trials posting Settlement Points and MP Short Names (as of 10/21/2010) today • That was a manual posting available only until the automated posting was available on MIS • Settlement Points List and Electrical Buses Mapping information may be found under the MIS Operating Day System Conditions portlet • MP short names can be found at Landing Page: http://www.ercot.com/mktparticipants/Direct Link: List of Market Participants in ERCOT Region • FAQ: Why a combined cycle resource was not awarded in the DAM, or why DAM transitioned the combined cycle down to a lower configuration at the end of the day.  A: The DAM engine studies a 24 hour period, and must respect the resource constraints within that period.  DAM must make sure that a resource is capable of shutdown by the last hour of the day/award, so the last hour awarded to a combined cycle resource will be from a shutdown-capable configuration.  If no configuration is offered into the DAM that is capable of being shut down directly (this is a RARF parameter), then DAM will not award the resource at all.  Similarly, if no configuration is offered into the DAM that is capable of being started up directly, DAM will not award the resource unless it is initially online at the end of the current day.  http://nodal.ercot.com 3

  4. Daily Call – 10:30 8 Days Until Go-Live • General Updates / Reminder • Listener URLs • ERCOT continues to receive several requests for Listener URL updates • ERCOT is asking that all remaining updates to Listener URLs be submitted by EOB tomorrow (11/24/2010) to nodalmarkettransition@ercot.com • Data Access Frequency (Dashboards, Extracts, Reports, etc) • All MPs need to review the frequency of which they are downloading / programmatically accessing data from ERCOT systems • ERCOT Support Teams are finding several MPs that are accessing reports at an unreasonable frequency • For example, some Daily Reports (generated once in a 24-hour period) are being hit 150,000+ times / daily by some QSEs • This will assist ERCOT in gauging post Go-Live performance and sizing / scaling of systems going forward to support reasonable data access behavior • If there are questions on the frequency of a particular report, MPs can access the ERCOT Market Information List (EMIL), currently posted at: (Under Key Documents): http://nodal.ercot.com/readiness/reports/index.html http://nodal.ercot.com 4

  5. Follow-Up: November Full System Reliability and Market Test Results • Generation Resource Energy Deployment Performance (GREDP) • Measure of how well resources follow dispatch instructions • Non-Wind, Non-DSR Generators and DSR Portfolios must have a GREDP less than 8%or 8 MWfor 85% of the intervals in which GREDP was scored Non-WGRs/ Non-DSRs DSRs

  6. Follow-Up: November Full System Reliability and Market Test Results • Generation Resource Energy Deployment Performance (GREDP) • Measure of how well resources follow dispatch instructions • Wind Generators must have a GREDP less than 10% or the output must be less than their expected output for 95% of the intervals in which GREDP was scored • Wind Generators are only scored during curtailment WGRs

  7. Follow-UP: Example - Scoring GREDP for IRRs • Wind must have a GREDP less than 10%: • For this example, assume no exclusions were active and that LSL = AEGR = ARI = 0 for the WGR GREDP (%) = ABS[((ATG – AEGR)/(ABP + ARI)) – 1.0]*100 • OR output must be less than expected output: ATG <= Expected MW = AEGR + ABP + ARI (4÷8)*100 = 50% # of Intervals passed: 4

  8. QUESTIONS? http://nodal.ercot.com 8

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