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2007 ACC Summer Preparedness Hearing

2007 ACC Summer Preparedness Hearing. Tucson Electric Power & UNS Electric March 22, 2007 Ed Beck Superintendent Transmission & Distribution Planning Leland Snook General Manager Wholesale Energy Supply. Service Territories . San . Juan. Navajo. Four Corners. Mead. McKinley.

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2007 ACC Summer Preparedness Hearing

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  1. 2007 ACC Summer Preparedness Hearing Tucson Electric Power & UNS Electric March 22, 2007 Ed Beck Superintendent Transmission & Distribution Planning Leland Snook General Manager Wholesale Energy Supply

  2. Service Territories San Juan Navajo Four Corners Mead McKinley Mohave Cholla Westwing Coronado Pinnacle Peak Palo Springerville Verde Liberty Tortolita Greenlee UES Tucson South Vail TEP

  3. AZ Power Plant Additions

  4. AZ Power Plant Additions

  5. 2007 Generation Resources

  6. 2007 Peak Demand Loads and Resources

  7. 2007 Generation Preparations

  8. UNSE Loads & Resources • UNSE under full-requirements contract through 5/31/2008. Load and resource summary provided in APS presentation. • UNSE has been and continues to procure generation resources through resource acquisition and quarterly request for proposals • To date 100 MW of capacity under firm PPA contracts for Summer 2008 • 90 MW of capacity under construction at Black Mountain Generation Station located outside Kingman • 67 MW of capacity at Valencia Generating Station in Nogales

  9. TEP Import Paths With Max Local Gen. Limit of 1,984 MW Westwing Tortolita North Loop Greenlee 83 Local Gen. 547MW TEP Service Area Winchester DMP Vail 44 Voltage 500 kV South 345 kV Irvington 420

  10. Operations preparation • Regional black start drills between control areas currently taking place • Verification of TEP’s Emergency Operations Center (EOC) readiness scheduled in April 2007 • Weekly check of EOC systems occurs • Daily conference call between reliability coordinator and control area operators to review system conditions • During summer peak AZ entities hold daily reliability call • New radio system deployed since last summer

  11. Distribution Preparations • Review and adjust Power Factor as needed • Installation of mobile transformer to support the Vail area of TEP service territory until new 138kV substation is developed

  12. UNS Electric Transmission • Mohave – Transmission from Pinnacle West Delivery points to UNS loads is provided by Western Area Power • Santa Cruz load is served at peak with a combination of firm Western transmission and non-firm transmission supported by local generation at Valencia

  13. UNS Electric System – Santa Cruz • Installed remote control switch at Canez substation to allow for operational flexibility • Pre- storm season patrols completed with no major items identified for repair

  14. UNS Electric System – Mohave • Installed 2 new Distribution Substations • 12 miles of new 69kV line installed • 14 miles of new 230kV line (initially operated at 69kV) • Pre- storm season patrols completed with no major items identified for repair

  15. Conclusion • Sufficient Resources are available to meet TEP load • Sufficient Transmission is available to meet TEP load • Sufficient Transmission is available to meet UES Mohave load • Transmission in conjunction with local generation is sufficient to meet Santa Cruz load

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