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TRANSMISSION INFRASTRUCTURE IMPROVEMENTS — Current Projects —

TRANSMISSION INFRASTRUCTURE IMPROVEMENTS — Current Projects —. Steve Wheeler Executive Vice President Arizona Public Service Company. The Center for the New West “ The Sun Valley Energy Roundtables 2006” November 30 – December 1, 2006. About APS.

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TRANSMISSION INFRASTRUCTURE IMPROVEMENTS — Current Projects —

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  1. TRANSMISSIONINFRASTRUCTURE IMPROVEMENTS— Current Projects — Steve WheelerExecutive Vice PresidentArizona Public Service Company The Center for the New West“The Sun Valley Energy Roundtables 2006”November 30 – December 1, 2006

  2. About APS A subsidiary of Pinnacle West Capital Corporation • Largest electric utility in Arizona • Second fastest growing utility in country • Peak Control Area load over 7700 MW • Over 1 million customers • $1 billion Ten-Year In-state transmission expansion plan

  3. Transmission – East vs. West

  4. Increasing Transmission Capability OPTIONS • Upgrade existing system • New conductor technologies • New facilities • Advanced technologies for control • Integrated resource planning

  5. Use of New Conductor Technology • Re-conductor West Phoenix-Lincoln Street 230kV line • 3M Aluminum Conductor Composite Reinforced (ACCR)

  6. Palo Verde Hub – TS5 – Raceway – Pinnacle Peak 500kV Project • New 500 kV system connecting SW Phoenix to NE Phoenix • Add 1500 MW import capability to Phoenix Area • Provide additional export capability for generation at Palo Verde Hub • Provide voltage support for NE Phoenix Area • $0.6B for 110 miles of line and substation equipment

  7. Palo Verde Hub to Yuma 500kV • Provide 2nd 500kV source from Palo Verde Hub to Yuma • Provide transmission import capability to serve rapid load growth in theYuma Area • Provide additional export capability for generation at the Palo Verde Hub • In service date 2012 • Permitting work underway • $300M cost estimate for 115 mile line and substation equipment

  8. Dave Johnston Conceptual TransWest Express ProjectDC Option

  9. TransWest Express Project Summary • Driven from LSE need • Enables renewable wind and advanced clean coal technologies • Open stakeholder process • Transmission and permitting feasibility analysis essentially complete • Coordinating with Frontier activities

  10. TransWest Express Project Timeline • 2006 Phase 1 feasibility study • 2007-2011 Phase 2 permitting • 2012-2015 Phase 3 construction • 2015 Phase 4 commercial operation

  11. Feasibility Study Conclusions • Technically feasible • Economics indicate DC or AC/DChybrid alternatives • Multiple routes viable with minimal impact on sensitive environmental areas • Existing plans for AZ-CA expansion provide increase transfer capability in excess of 3000MW

  12. TransWest ExpressCurrent Status • Phase 2 Agreement in negotiation • Participants: • APS • SRP • SCE • TEP • National Grid • Wyoming Infrastructure Authority

  13. Phase 2 Work Plan • Five year schedule 2007- 2011 • Estimated cost of approximately $115M • Engineering and design • Routing • Permitting and approvals • Outreach and coordination • Options on right of way

  14. Coordination with Frontier Line Activities • APS participant in Frontier Line feasibility study • TransWest Express one of transmission options in Frontier study • Frontier economic analysis will include TransWest Express • Possible participation in TransWest Express by Southern California load serving entities

  15. Increasing Transmission CapabilityKey Considerations • Resource needs • Renewable requirements • Resource diversity • Financial considerations • Business model • Siting feasibility • EPACT provisions • FERC initiatives

  16. Coordination of Generationand Transmission • Can’t invest in one without assuranceof the other • Timing issues • Permitting • Construction • FERC Standards of Conduct • IRPs • Regional transmission planning activities

  17. Conclusion • Transmission expansion remains a daunting exercise in engineering, siting, technology, economics, and public policy • Coordinated planning and cooperation at all levels is essential • A stout heart is required

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