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ERCOT RPG Project Review Update

ERCOT RPG Project Review Update. Jeff Billo. RPG Project Review Update. Recommendation Letter sent for: AEPSC Abilene to San Angelo Project (Tier 2) Recommendation Letter in process for: Centerpoint Garrott-Midtown-Polk Upgrade Project (Tier 3) ERCOT Independent Review nearly complete for:

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ERCOT RPG Project Review Update

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  1. ERCOT RPG Project Review Update Jeff Billo RPG Meeting

  2. RPG Project Review Update Recommendation Letter sent for: AEPSC Abilene to San Angelo Project (Tier 2) Recommendation Letter in process for: Centerpoint Garrott-Midtown-Polk Upgrade Project (Tier 3) ERCOT Independent Review nearly complete for: Centerpoint 2012 Northwest Houston Reliability Project (Tier 2) ERCOT Independent Review in process for: AEPSC Corpus Christi Improvements (Tier 1) Sharyland ERCOT Southeast Loop (Tier 1) [part of 2009 5YTP] Oncor Lamesa Area Upgrades (Tier 1) [part of 2009 5YTP] Comment period completed for: Luminant Energy Comanche Peak Congestion Mitigation (Tier 2) Study mode in process for: Centerpoint North-Houston Constraint Mitigation Project (Tier 1) RPG Meeting

  3. RPG Project Review Update Other projects under review Oncor Comanche Peak 3 and 4 Additions Project (Tier 1) ERCOT Independent Review will be completed after Five-Year Transmission Plan RPG Meeting

  4. Lamesa Area Study Oncor Lamesa Area Upgrades RPG Meeting

  5. Lamesa Area Study Oncor Lamesa Area Upgrades Cancellation of IA for Coyote Run will impact study RPG Meeting

  6. 2009 Houston Import Study Houston Import Study RPG Meeting

  7. 2009 Houston Import Study • Why are we studying this? • ERCOT Independent Review of Sharyland’s ERCOT Southeast Loop RPG Project (Tier 1) • ERCOT 2009 Five-Year Transmission Plan Economic Analysis • Ongoing congestion in real-time • ERCOT Independent Review of Centerpoint’s North to Houston Constraint Mitigation RPG Project (Tier 1) • still in RPG comment period RPG Meeting

  8. 2009 Houston Import Study Assumptions • Study Assumptions • Base case = 2009 5YTP 2014 Economic Start Case • Includes all 2009 5YTP reliability projects identified for 2014 • Includes all CREZ transmission facilities • Does not include additional CREZ generation • Analysis will focus on economic benefit of additional import capacity into Houston area • Uplan • Voltage stability analysis will be performed • Interface limits will be used as a proxy in Uplan for voltage stability RPG Meeting

  9. 2009 Houston Import Study • Approach • At the July 17, 2009 RPG Meeting ERCOT asked for comments on the scenarios that should be studied BC + New Gas Gen North of Houston BC + New Gas Gen In Houston BC + Load Variation Base Case BC + CREZ Generation BC + Comanche Peak 3 & 4 BC + STP 3 & 4 Bulk of analysis will focus on the base case. Options may be eliminated at this stage. Alternate scenarios will be used to quantify relative merit of options that pass first stage. Final recommendation will be selected. Sensitivity scenarios will be run for recommended option and results added to report. RPG Meeting

  10. 2009 Houston Import Study • Current Status • Preliminary Screening of Options • Sharyland RPG submittal and comments • Centerpoint RPG submittal and comments • ERCOT 2008 LTSA • Voltage Stability Analysis • Next Steps • Analyze options for economic benefit in Uplan 2014 base case • Analyze voltage stability limitations for possible local improvements RPG Meeting

  11. Questions? RPG Meeting

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