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Impacts of the Western Drought on the Regional Electricity Situation

机译：西部干旱对区域电力形势的影响

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The projected electrical demand and supply situation in the West are examined, with particular emphasis on the Pacific Northwest situation during the winter of 1977. While the projected shortage of energy is small, continued lack of precipitation and failure to pursue conservation measures could result in a more critical situation. An interim report published on March 31, placed emphasis on the California situation; this report updates that evaluation and presents new information based on the Pacific Northwest's winter electricity outlook. Drought conditions have decreased the ability of some hydroelectric plants to produce sufficient electric energy necessary to maintain power supply to interruptible customers and, potentially, to firm customers. The largest coordinating group of electric utilities in the drought area is the Northwest Power Pool (NWPP), which is part of an interconnected network of power plants and transmission facilities within the Western Systems Coordinating Council (WSCC), a voluntary association of utilities serving all or part of 14 states, and a portion of Canada. In the U.S. portion of NWPP, where 66.3% of the projected winter energy will be from hydroelectric facilities, the proportion of hydroelectric to thermal generation is much higher than in the other WSCC areas. It is unlikely that existing water shortfalls can be replenished, although increased precipitation may alleviate problems in some areas. The reduced water supplies have created the prospect of inadequate hydroelectric generation and the need for other measures to respond to regional electricity demands. These conditions are reviewed and the results are summarized, focusing on the period of October, 1977 through March, 1978. (ERA citation 03:021743)

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