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CATS HV Status Report

CATS HV Status Report. Presented to the 2008 BTA Workshop May 22, 2008. CATS HV Study Area. Summary. With a 25 MVAR capacitor at Thornton: The Ten-Year Plan exhibits no pre or post outage condition voltage or thermal issues in CATS HV system

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CATS HV Status Report

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  1. CATS HV Status Report Presented to the 2008 BTA Workshop May 22, 2008

  2. CATS HV Study Area

  3. Summary • With a 25 MVAR capacitor at Thornton: • The Ten-Year Plan exhibits no pre or post outage condition voltage or thermal issues in CATS HV system • N-1 performance with additional local load beyond 2016 load level: • voltage violations commence @ +100 MW • thermal violations begin @ + 200 MW

  4. Addendum to 2007 Study • Thermal Overloads and Voltage Violations identified in 2016 “growth” scenario cases • Review Western 115kV upgrades to 230kV construction (poles and wire) but still operated at 115kV • Conclusions • Upgrades Mitigate Voltage and Thermal Violations • CATS HV System can accommodate at least 300MW of additional loads beyond 2016 time frame with proposed upgrades • Approved by CATS HV participants

  5. CATS HV Participants • Transmission Owners • Arizona Public Service Tucson Electric Power • Salt River Project Western Area Power Administration • Southwest Transmission Coop. • Load Serving Entities • Arizona Public Service Electrical District 2 • Central Arizona Project Electrical District 3 • San Carlos Irrig. Project Electrical District 4 • Trico Distribution Coop. Electrical District 5 • Governmental Entities • AZ Attorney General’s Office Arizona Corp. Commission • Arizona Power Authority City of Casa Grande • Town of Eloy Town of Coolidge • Town of Maricopa Pinal County

  6. Study Group Participants • Arizona Public Service • Electrical District 2 • Electrical District 3 • Electrical District 4 • Electrical District 5 • Salt River Project • Southwest Transmission Coop. • Tucson Electric Power

  7. 2008 Study Plan • 2018 Transmission Plan for CATS HV detailed system with WestConnect coordinated base case • Resource Scenarios based on probable energy zones (500MW increments) • Document all findings and conclusions coincident with SWAT/WestConnect Annual Report by October 2008

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