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Reliability Impact of Solar Electric Generation upon Electric Utility Systems

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2 Author(s)
John T. Day ; Advanced Systems Technology Division; Westinghouse Electric Corporation; 777 Penn Center Boulevard; Pittsburgh, Pennsylvania 15235 USA. ; Walter J. Hobbs

The introduction of solar electric systems into an electric utility grid brings new considerations in the assessment of the utility's power supply reliability. This paper summarizes a methodology for estimating the reliability impact of solar electric technologies upon electric utilities for value assessment and planning purposes. Utility expansion and operating impacts are considered. Sample results from photovoltaic analysis show that solar electric plants can increase the reliable load-carrying capability of a utility system. However, the load-carrying capability of the incremental power tends to decrease, particularly at significant capacity penetration levels. Other factors influencing reliability impact are identified.

Published in:

IEEE Transactions on Reliability  (Volume:R-31 ,  Issue: 3 )