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CREZ Transmission Optimization Study

CREZ Transmission Optimization Study. Warren Lasher System Assessment. Looking for 8. PUC Docket No. 33672 Began in January 2007 Parties nominated CREZs and demonstrated financial commitment Most proposed CREZs based on the areas developed in the AWS Truewind study.

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CREZ Transmission Optimization Study

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  1. CREZ Transmission Optimization Study Warren Lasher System Assessment ERCOT Regional Planning Group Meeting

  2. Looking for 8 PUC Docket No. 33672 • Began in January 2007 • Parties nominated CREZs and demonstrated financial commitment • Most proposed CREZs based on the areas developed in the AWS Truewind study • TSPs and potential TSPs put forth alternate transmission solutions • Hearing on Merits held June 11-15 • Decision on CREZ reached in late July; written order has not yet been issued, so some details are still unclear ERCOT Regional Planning Group Meeting

  3. Your Mission, If You Choose to Accept It… Subject To Change ERCOT Regional Planning Group Meeting

  4. The Process • Will be conducted similar to the Regional Planning Group process, on fast-forward • Frequent meetings will be held to discuss options, modeling, and results • First meeting is scheduled for August 31 at the MET Center • The RPG – CREZ mailing list will be used to distribute information associated with the study • Participants will be expected to propose alternatives and to review each other’s proposed solutions • Transmission solutions will be developed for the four scenarios outlined in the Interim Order • Higher-penetration scenario(s) will require some pre-work • ERCOT will perform the independent assessment ERCOT Regional Planning Group Meeting

  5. Project Timeline Gather Options for Connections in CREZ Areas Evaluate Options for System Connections Incorporate Results of A/S Study Modify Base Case for Higher Wind Scenarios Evaluate System Upgrade Options for Higher Wind Scenarios Establish Mailing List and Set Meeting Schedule ERCOT Review and Report Stability Analysis Review Results Aug. 31 Feb. 15 Gridlines Represent 2-Week Periods ERCOT Regional Planning Group Meeting

  6. Develop and Evaluate Options for Collecting Wind Generation In CREZ Areas • Survey stakeholders for proposals • Develop multiple collection options for all 4 scenarios • Will require discussion of direct connection issues within a CREZ Project Timeline Gather Options for Connections in CREZ Areas Evaluate Options for System Connections Incorporate Results of A/S Study Modify Base Case for Higher Wind Scenarios Evaluate System Upgrade Options for Higher Wind Scenarios Establish Mailing List and Set Meeting Schedule ERCOT Review and Report Stability Analysis Review Results Aug. 31 Feb. 15 Gridlines Represent 2-Week Periods ERCOT Regional Planning Group Meeting

  7. Project Timeline Gather Options for Connections in CREZ Areas Evaluate Options for System Connections Incorporate Results of A/S Study Modify Base Case for Higher Wind Scenarios Evaluate System Upgrade Options for Higher Wind Scenarios Develop System-Wide Improvements (Scenarios 1, 2, and JP) Establish Mailing List and Set Meeting Schedule ERCOT Review and Report Stability Analysis Iterate this process until solutions are optimized Review Results Aug. 31 Feb. 15 Gridlines Represent 2-Week Periods ERCOT Regional Planning Group Meeting

  8. Project Timeline Gather Options for Connections in CREZ Areas Evaluate Options for System Connections Incorporate Results of A/S Study Modify Base Case for Higher Wind Scenarios Evaluate System Upgrade Options for Higher Wind Scenarios Establish Mailing List and Set Meeting Schedule ERCOT Review and Report • The higher wind scenario(s) may require a modified evaluation process • May not be sufficient load in 2012 case to absorb the higher scenario(s) level of wind generation • Review generation operating assumptions Stability Analysis Review Results Aug. 31 Feb. 15 Gridlines Represent 2-Week Periods ERCOT Regional Planning Group Meeting

  9. Draft Results of the Ancillary Services study are expected in November Project Timeline Gather Options for Connections in CREZ Areas Evaluate Options for System Connections Incorporate Results of A/S Study Modify Base Case for Higher Wind Scenarios Stability studies on scenarios 1 and 2 are expected to take 6 weeks Evaluate System Upgrade Options for Higher Wind Scenarios Establish Mailing List and Set Meeting Schedule ERCOT Review and Report Stability Analysis Review Results Aug. 31 Feb. 15 Gridlines Represent 2-Week Periods ERCOT Regional Planning Group Meeting

  10. Base Cases – Strawman Proposal • Base transmission topology will be developed from the final year (2012) of the current Five-Year Plan • Latest Validated Case available • Derived from the 2007 SSWG Dataset B case • System Peak Load of 78,355 MW • Wind patterns developed from AWS Truewind study • Gas price: $7.00/MMBtu (delivered) • Generation Fleet: Operating units and units with signed interconnection agreements • As noted, the higher wind scenarios may require a modified evaluation process. Generation operations assumptions and load levels will be reevaluated for these scenarios. ERCOT Regional Planning Group Meeting

  11. August 31st Meeting Topics • Discussion of direct connection and hub(s) placement • Discussion of alternative “on-ramp” options • List of issues ERCOT Regional Planning Group Meeting

  12. On Your Mark… • Sign up for the RPG - CREZ list at http://Lists.Ercot.com. • Let me know if you have any questions (wlasher@ercot.com) • Please participate in the process ERCOT Regional Planning Group Meeting

  13. Questions or Comments?

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