Presentation on theme: "Special Open Meeting of the Arizona Corporation Commission Energy Workshop February 16, 2001 Arizona Public Service Company Cary B. Deise Director, Transmission."— Presentation transcript:
Special Open Meeting of the Arizona Corporation Commission Energy Workshop February 16, 2001 Arizona Public Service Company Cary B. Deise Director, Transmission Operations and Planning
3 Reliability To meet customers electric energy requirements on time. Factors impacting reliability Customer Requirements Transmission, Generation and Distribution availability Weather Neighboring systems
4 APS Service Territory
5 APS Valley Service Territory
6 Peak Load Forecast 5.7% Residential Commercial Industrial Other Residential Commercial Industrial Other % Residential Actual Commercial Industrial Other Values in MW
10 APS fuel supply plan is characterized by Diverse fuel types Firm contracts Futures and options contracts Spot market transactions Duel fuel burning capacity at existing gas fired plants Fuel Supply Plan
11 Fuel Supply Continued Projected annual fuel consumption
12 Length of Supply and delivery contracts Fuel Supply Continued Coal: Depending on plant Natural Gas: Firm supply contracts with 100% coverage through 2002; transport 2013 Nuclear: 100% coverage through 2003; evaluating proposals for 2004 to 2008
13 APS EHV System Transmission Capacity less wheeling obligations N. Gila 140 Navajo 315 Westwing Moenkopi Yavapai 559 Palo Verde 1105 Kyrene 1643 Pinnacle Peak Saguaro Mead Four Corners 782 Cholla kV 345kV
14 APS EHV System Total Transmission to Load Purchased Transmission Total Remote Generation (2817) (3805) Purchase (Pac + Short-Term) (1656) (1118) Margin
15 Overhead Underground APS Valley 230kV Transmission Pinnacle Peak Reach Kyrene Ocotillo Westwing Country Club Agua Fria Alexander West Phoenix White Tanks
17 Conclusions Transmission additions are critical. APS fuel sources are secure and diverse. Future new generation is critical.
18 Conclusions (cont.) APS has and will acquire the resources necessary to achieve reliable system operations in 2001 and 2002 Although the APS plans meet the forecast reliability requirements, unforeseen events such as violent storms, extreme hot spells,equipment failures and construction delays can threaten the security and adequacy of the electric power system.