考虑不确定性的电压暂降不兼容度和影响度评价指标及方法

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Abstract With the extensive use of sensitive electrical equipment,voltage sag has become one of the most important power quality problems.Evaluating the severity and the influence on sensitive equipment of voltage sag reasonably and accurately can not only measure the quality of power system supply,but also provide basis for fixing prices according to the quality in the electric power market.In order to assess the severity and the influence of voltage sag reasonably and accurately in sensitive equipment,some uncertainty representations are applied in voltage sag severity assessment.Cloud model is used to describe voltage sag’s features and voltage tolerance of sensitive equipment,and fuzzy security incidents membership function is used to describe the state of equipment failures subjected to voltage sag.Incompatibility index and influence index are presented by cloud model to reflect and calculate the severity and the influence of voltage sag in sensitive equipment.Distribution network voltage sag simulation examples show that the presented method is feasible and reasonable.

Key words： Voltage sag incompatibility index influence index cloud model fuzzy theory security event membership function

Received: 14 July 2015 Published: 19 January 2017

PACS:

TM714.2

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	Jia Qingquan
	Ai Li
	Dong Haiyan
	Shi Leilei
	Tian Leilei

Cite this article:

Jia Qingquan,Ai Li,Dong Haiyan等. Uncertainty Description and Assessment of Incompatibility & Influence Index for Voltage Sags[J]. Transactions of China Electrotechnical Society, 2017, 32(1): 48-57.

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https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2017/V32/I1/48

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