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CMWG update

CMWG update. WMS 19 July, 2006. Outline. 2007 CSC Analysis List of issues related to the calculation of TCRs. 2007 CSC Analysis. Met on June 28 to discuss 2007 CSCs ERCOT staff provided 15 cluster analysis scenarios and bus comparisons under a 5 zone scenario

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CMWG update

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  1. CMWG update WMS 19 July, 2006

  2. Outline • 2007 CSC Analysis • List of issues related to the calculation of TCRs

  3. 2007 CSC Analysis • Met on June 28 to discuss 2007 CSCs • ERCOT staff provided 15 cluster analysis scenarios and bus comparisons under a 5 zone scenario • Stakeholders requested additional analysis for the: • Selection of the South to Houston double circuit line • Impact to TCRs • Next meeting: July 28; 9:00 am to 12 noon

  4. TCR Calculation Impacts • Issue: Increase visibility of TCR revenue adequacy. • Activity: TCR quarterly reports posted – MPs need to provide comments on content. • Issue: Improve outage impact determination. • Solution: Outage Sensitivity Factor Project (PR-30056-01) pending; this tool allows for a quicker review of specific outage impacts

  5. TCR Calculation Impacts • Issue: Determine methodology for outage significant impact. • Activity: Currently outages lasting 5 days or more are considered to have an impact; need to review impact of multiple outages lasting less than 5 days. • Issue: Review differences in load distribution between TCR case vs. daily operation case. • Solution: Additional analysis not required at this time.

  6. TCR Calculation Impacts • Issue: Inclusion of generator outages in TCR case. • Activity: Generator outages are protected information for 180 days. TCR posting requirement is for TCR quantities only. PRR needed to allow generator outages inclusion in Section 7.5.2.2 • Recommend implementation no sooner than 2007 annual auction • Question about whether generation outages should be included for Annual auction or only in monthly

  7. TCR Calculation Impacts • Issue: Use of Dynamic & Seasonal Ratings for TCR calculation. • Solution: Leads to TCR underselling, no additional analysis is required at this time. • Issue: Comparison of STNET vs MUST. • Solution: Leads to TCR underselling, no additional analysis is required at this time.

  8. TCR Calculation Impacts • Issue: IDEF vs. Service Request submittals. • Solution: Revised TPIT requests to include SR number. • Issue: 40% annual TCR limit. • Activity: ERCOT analyzing historical trend.

  9. TCR Calculation Impacts • Issue: Improve accuracy of 45-day outage list. • Solution: ERCOT emails TOs to update outage list prior to TCR calculation. • Issue: Review possible delays in outage postings. • Solution: There is no delay in outage postings, therefore no action required.

  10. TCR Calculation Impacts • Issue: TCR training for TO personnel. • Solution: Presented at Outage Scheduler meeting in August 2005.

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