复杂配电网的电压暂降随机预估方法

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Abstract With the development of new transmission and distribution techniques and rising requirement of modern consumers for better power quality, the voltage sag analysis and assessment has become an important research subject in power quality presently. In this paper the reconfiguration system (RCS)method, which derives from the direct method, is proposed for the voltage sag estimation in complex distribution systems. The coefficients of the voltage sag expression are calculated directly from the power flow calculation of reconfiguration system with RCS method. The areas of vulnerability and expected sag frequency (ESF) indices of sensitive load under three-phase short-circuit fault, single line-to-ground fault, double line-to-ground fault and line-to-line fault are calculated respectively. It is proved by IEEE 30-bus system that the RCS method is suitable for stochastic estimation of voltage sag in large distribution systems.

Key words： Voltage sag stochastic estimation area of vulnerability system reconfiguration power flow calculation

Received: 27 February 2009 Published: 18 February 2014

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TM712

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	Articles by authors
	Li Gengyin
	Yang Xiaodong
	Zhou Ming

Cite this article:

Li Gengyin,Yang Xiaodong,Zhou Ming. Stochastic Estimation Method of Voltage Sags in Complex Distribution Systems[J]. Transactions of China Electrotechnical Society, 2009, 24(11): 134-141.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2009/V24/I11/134

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