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TAC Report to the ERCOT Board

TAC Report to the ERCOT Board. October 21, 2003. Summary. RMR exit strategies for La Palma and Fort Phantom endorsed TNT recommendations Operating Guide Revision 2004 Test Plan schedule revisions Daily Uplift Cost Estimation Report PRRs 381, 427, 428, 444, 447, 460 2004 CSCs and zones

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TAC Report to the ERCOT Board

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  1. TAC Report to the ERCOT Board October 21, 2003

  2. Summary • RMR exit strategies for La Palma and Fort Phantom endorsed • TNT recommendations • Operating Guide Revision • 2004 Test Plan schedule revisions • Daily Uplift Cost Estimation Report • PRRs 381, 427, 428, 444, 447, 460 • 2004 CSCs and zones • LCRA and STEC exemption requests

  3. Notification of TAC actions Operating Guide Revision • OGRR 137 – Revision due to PRR415Establish 50% as Limit for LaaRs Providing RRS Market Testing Flight Schedules • Four flights scheduled for 2004: v1.6-0104, v1.6 -0304, v2.0-0504, v2.0-0904 Endorsed the prioritization of 2004 projects by PRS

  4. Daily Uplift Cost Estimation Report

  5. PRR381 – Update QSE Designation • Defines steps for LSE or Resource to designate a new QSE • Allows LSE to become ‘Emergency QSE’ for seven days • Impact: Intense manual workaround required infrequently • Recommend November 1, 2003 effective date

  6. PRR427 – RMR General Clarifications • Provides more details related to eligible costs to be paid to RMR units • Impact: ERCOT Staff and business processes. No impact to ERCOT computer systems or operating processes. • Recommend November 1, 2003 effective date

  7. PRR428 – RMR Scheduling Clarifications • Clarifies scheduling procedures for RMR units • Impact: Minor ERCOT Staff and operating processes impacts. Potential impact to ERCOT computer systems. • Recommend November 1, 2003 effective date

  8. PRR444 – Move In / Move Out Stacking • Addresses significant issues related to non-sequential transactions on a single ESI ID • Impact: ERCOT computer systems and operating processes, significant impact to ERCOT staffing • Recommend November 1, 2003 effective date for portions that don’t require system modifications, remainder effective upon system implementation

  9. PRR447 – TCR Austin Posting and PCR Cost Determination • Clarifies posting requirements • Adds formula to determine cost of PCRs • Impact: None to ERCOT computer systems or operating processes. • Recommend November 1, 2003 effective date

  10. PRR460 – CSC Exemption Criteria • Documents the process and criteria by which exemption requests are evaluated • Impact: Potential impact to ERCOT Staffing and computer systems. • Recommend November 1, 2003 effective date • Approved by TAC with a vote of 24 in favor, 6 opposed.

  11. 2004 CSC / zone saga MAY • TAC ready to recommend keeping 3 CSCs and 4 Zones for 2004 • Significant North to Houston congestion • Recommendation withdrawn JULY • Significant Royse – Farmersville congestion • Accelerated PRR440 to eliminate Market Solution for local congestion

  12. 2004 Proposals • Existing Model • 4 Zones/3 CSCs • North/Houston CSC • 4 Zones/4 CSCs (Adds CSC between North & Houston zones) • Northeast Zone • 5 Zones and 5 CSCs (Adds CSC between North & Houston zones and adds Northeast Texas zone/CSC) • 7 Zones and 11 CSCs • Subdivides the North zone into 3 zones and subdivides the South zone into 2 zones

  13. EXISTING 2003 4 ZONE / 3 CSC W – N CSC 1 3 S – N CSC 2 4 S – H CSC

  14. 7 ZONE / 11 CSC 3 4 7 1 5 6 2

  15. Final_4_4

  16. Final_5_5 Load Gen West 4,104 4,159 North 24,911 22,179 Houston 19,939 17,871 South 17,167 20,211 Northeast 1,488 4,679 Grand Total 67,608 69,100

  17. Road to a Recommendation • Sep 17: WMS eliminates 3 CSC/4 zone and 11 CSC / 7 zone options from further consideration • Oct 2: WMS recommends 5 CSC/5 zone option to TAC with a vote of 4.25 in favor, 3.25 opposed • Oct 9: TAC takes four different votes but is unable to make recommendation • Oct 17: On its third vote, TAC approves 5 CSC/5 zone recommendation with a vote of 19 in support, 7 opposed and 4 abstentions.

  18. CSCs

  19. Exemption Requests • STEC • Three busses from Houston to South • Total load affected is ~10 MW • LCRA • Two busses from Houston to South • At end of a radial transmission line from the South zone until June 2004. • Total load affected is ~20 MW • TAC recommends granting both exemptions

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