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CURRENT AND ANTICIPATED 1982 SYSTEM CONDITIONS PEAK AND ENERGY LOAD REQUIREMENTS I I I I I I I I I I I I I I I I I I I 70 load shedding programs were instrumental in minimizing the geographical area and the number of customers affected by these disturbances. The amount of load interrupted as a result of these disturbances ranged from o MW to 4543 MW and in general the interruption experienced by most customers was of short duration. In isolated instances a small number of customers were without electric service for as long as 48 hours. Information regarding each of the above disturbances has been submitted to NERC and the U.S. Department of Energy's Office of Emergency Operations. The most noteworthy disturbance in the WSCC region during 1981 occurred on January 8 when a large fire underneath two 345 kV lines on the same structure in the Utah Power & Light Company system resulted in tripping of the lines. Additional facilities then tripped, resulting in loss of power to the state of Utah and portions of Southeastern Idaho and Southwestern Wyoming. Restoration of a majority of the nearly 1050 MW of load interrupted by the disturbance was accomplished in about 2t hours, with essentially all load restored within 7t hours. The WSCC 1982 non-coincidental peak demand of 87,115 MW is projected to occur in July representing a 3.8 percent increase over the actual 1981 peak demand which occ~rred in August. The WSCC 1982 total energy load is projected to be 528,027 GWH, representing a 4.2 percent increase over the actual 1981 energy load. The current projections for 1982 summer peak demand and total energy load are 1.7 percent and 2.2 percent lower than last year's respective projections due to depressed economic conditions and greater recognition of price elasticity, load management and conservation efforts in the forecasts. ADEQUACY OF RESERVES AND ENERGY CAPABILITY The adequacy of reserves and energy capability within the WSCC region during 1982 appears to be satisfactory in most areas. It should be emphasized, however, that reserve adequacy and energy capability are highly dependent upon a number of factors which are difficult at best to project. Some of these factors include accumulated snowpack and precipitation within the region, the impact of weather conditions on weather sensitive loads, and the number of simultaneous generating unit forced outages which occur. Other factors include the effects of voluntary conservation efforts and the effects of the changing economy on load growth. Any deviation from what would be considered normal'for any of these factors would impact the adequacy picture.