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Arizona Corporation Commission 2007 Summer Assessment

Arizona Corporation Commission 2007 Summer Assessment. Steve Bischoff – General Manager Construction, Operations & Maintenance Tom Carlson - Portfolio Manager Marketing & Trading Tom Glock – Manager Power Operations. March 22, 2007. Executive Summary. Agenda.

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Arizona Corporation Commission 2007 Summer Assessment

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  1. Arizona Corporation Commission2007 Summer Assessment Steve Bischoff – General Manager Construction, Operations & Maintenance Tom Carlson - Portfolio Manager Marketing & Trading Tom Glock – Manager Power Operations March 22, 2007

  2. Executive Summary

  3. Agenda • System Improvements – 2006 / 2007 • Planned Maintenance Activities • Emergency Preparedness • Fuel & Purchase Power Adequacy • Loads & Resources - Adequacy • Transmission Adequacy • Contingency Planning • Conclusions

  4. Phoenix Phoenix Phoenix APS Service Territory APS Retail Service Territory - 34,650 square miles

  5. System Improvement Plans

  6. System Improvements 20062007 • New Meter Sets 45,493 41,482 • Subs – Distribution 10 6 • Distribution Sub MVA 593 417 • Feeders 52 43 • Distribution Line Miles 885 ~ 800 * ~ 90 % underground *

  7. System Improvements 20062007 • Subs – Transmission - 1 • Transmission Sub MVA 209 1027 • 230kV Line Miles (New) - 13 • 230kV Line Miles (Rebuild) 5 8 • 69kV Line Miles (New) 62 65 • 69kV Line Miles (Rebuild) 17 23 T&D Capital Expenditures $411 M $468 M

  8. APS EHV & OUTER DIVISION 115/230 kV TRANSMISSION PLANS 2007 - 2016 Willow Lake Substation 230 kV Transformer Upgrade Pinnacle Peak Substation 345 kV Transformer Upgrade Gila Bend Substation 230 kV Transformer Upgrade

  9. PHOENIX METRO (WEST) AREA TRANSMISSION PLANS 2007 - 2016 Westwing – Surprise 230kV Line Rebuild New 230 kV Transformer Palm Valley Substation New 230 / 69 kV Sub New 230 kV Line Rudd Substation 500 / 230 kV Transformer SRP joint project

  10. Palm Valley Project

  11. Westwing Update

  12. Westwing Update

  13. Planned Maintenance Activities

  14. Generation Planned Maintenance (Completed by Summer 2007) • Palo Verde 1 & 2 • Cholla 1 & 2 • Navajo 2 • Four Corners 2, 3, 4, & 5 • W. Phoenix CC 1 - 5 and CT 1 & 2 • Redhawk CC 1 & 2 • Saguaro Steam 1 & 2 and CT 1 - 3 • Yucca CT 1-4 • Ocotillo Steam 1 & 2 and CT 2 • Sundance CT 1, 3, 4, 5, 6, 9 & 10

  15. Transmission / Distribution • Periodic equipment testing on schedule • EPRI Solutions Recommendations • Increased use of on-line monitoring • Innovative technology to analyze data • Annual line inspections on schedule • Special emphasis on vegetationmanagement • Upcoming fire season

  16. Mobile 69/12kV Transformers Emergency Towers - Two Lindsey towers Generator - 1500 KW Mobile Unit Transformer Sharing Agreement Emergency Equipment

  17. External Agency Coordination

  18. External Coordination • Federal / State / County / Local • Wildland Fires • Response to Electrical Emergencies • NIMS Certification • Joint Training Initiatives • Preplans at Substations / UG Vaults • Summer / Winter Storms • Curtailment

  19. External Coordination • Extensive plans currently exist • Integrated Emergency Planning – continue to expand these efforts • Solid relationships exist with the various emergency management agencies • Build on those relationships for future needs

  20. Summary • Expansion of the electric infrastructure is on schedule • Maintenance efforts are likewise on track • Continued emphasis on joint planning and training with involved agencies for emergency preparedness

  21. Arizona Corporation Commission2007 Summer Assessment Steve Bischoff – General Manager Construction, Operations & Maintenance Tom Carlson - Portfolio Manager Marketing & Trading Tom Glock – Manager Power Operations March 22, 2007

  22. Fuel and Purchased Power Adequacy • Nuclear • Full requirements under contract. • Coal Cholla • Current inventory and contract commitments provide adequate coal for the projected 2007 burn. • Normally 35 days or more of inventory on-site. Four Corners • Mine mouth plant with full supply contract in effect. • Coal supplier maintains in-pit and processing plant inventory • Normally 35 days of inventory available.

  23. Fuel and Purchased Power Adequacy • Natural Gas • Sufficient firm gas transport on El Paso system to supply APS’ natural gas requirements • Majority of physical gas supply under firm contracts with reliable counterparties • Gas purchased in daily spot market to adjust for fluctuations as needed with firm contracts • Adequate supplies available from Permian/San Juan basins • Regional gas storage inventory slightly above 5 year average • Adequate fuel oil back-up at the Yucca, West Phoenix and Saguaro Plants

  24. Fuel and Purchased Power Adequacy Planning Reserves • APS maintains a 15% planning reserve margin throughout the summer peak usage season • Reserves are sufficient to meet contingency requirements • Adequate replacement capacity is available from the market for Summer 2007 in the event it’s required

  25. Arizona Corporation Commission2007 Summer Assessment Steve Bischoff – General Manager Construction, Operations & Maintenance Tom Carlson - Portfolio Manager Marketing & Trading Tom Glock – Manager Power Operations March 22, 2007

  26. Loads/Resources Adequacy

  27. Loads/Resources Adequacy APS Resources – Existing Generation

  28. Loads/Resources Adequacy Resources • Generation2007 (MW) Existing Generation 6142 • Long-term Contracts UniSource 414 Pacificorp Exchange480 SRP (Contingent & Territorial)230 Reliability RFP Purchases 1050 Renewables 35 Subtotal 2209 • Short-term Market Contracts250 • Total Resources8601

  29. Loads/Resources Adequacy APS Peak Load Forecast 7562MW 7652MW 3.5% 7542MW 7293MW 2007 Forecast 2006 Actual

  30. Loads/Resources Adequacy APS Load and Resources • Planned Margin (Reserves) are required to manage uncertainties such as: 1. Load Forecast Uncertainties A. Extreme Weather B. Economic Changes 2. Multiple Generator Outages 3. Transmission Outages • Planned Margin Equals Resources minus Annual Peak Load. • Typical Industry Planned Margin is 12 to 18%. Planned Margin 1059 MW / 17.7% 7542 MW 8601 MW Peak Load Resources

  31. Transmission Adequacy

  32. Navajo FourCorners Mead Moenkopi Yavapai Cholla Westwing PinnaclePeak Rudd Palo Verde Kyrene Jojoba Sundance Saguaro Gila River North Gila APS Transmission System

  33. Transmission Adequacy APS EHV System 6215 MW 6127 MW Purch Tx = 570 MW Tx to Load = 5645 MW

  34. APS/SRP Maximum Load Serving Capability 14000 13,000 MW 13000 12,375 MW 1350 MW 12000 11,643MW 11,650MW 2006 Actual 2007 Forecast Generation & Transmission Generation & Transmission 11000 Planned Margin 10000 9000 7000 2006 2007

  35. Yuma Maximum Load Serving Capability 500 480 MW 480 MW 480 460 71 MW 440 420 404MW 400 409 MW Forecasted Peak 2006 Peak 380 Generation & Transmission Generation & Transmission 360 340 320 300 2006 2007

  36. Contingency Planning

  37. Contingency Planning -Training & Drills • Backup Center Testing March • Regional Black Start Drill March • Usage of Load Curtailment tools May • Summer Studies (including forest fire corridors) May • Transmission Path Operations May • Emergency Operations Training JunePower Simulator

  38. Restoration Training Drill

  39. Primary Control Center

  40. Alternate Control Center

  41. State Wide Operations Coordination • Procedure Developed by APS/SRP/WAPA/TEP • Starting May 15th, Mondays or as needed • Timeline: 7:00AM Update status of equipment and field conditions for each utility 9:00AM APS/SRP/WAPA/TEP Conference call to discuss: Planned/Current generation outages Planned/Current transmission outages Weather forecast Load forecast Forest fires 10:00AM Internal meeting based upon current events

  42. Conclusions

  43. Conclusion • Generationresources are in place to meet customer load and reserve requirements • Transmissioncapacity in place to import remote generation and purchases • Distribution infrastructure improvements on schedule to meet customer needs. • Plans in-place to respond to extreme conditions

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