相控开关的早期故障检测及过零预测方法研究

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Abstract This paper analyzes the significance and the difficult of controlled interruption technology. It briefly introduces the status quo of zero-cross point of fault current. Early fault detection is applied into high voltage circuit breaker, being characterized by the fourth dimension component of wavelet transform, though the establishments of dynamic model laboratory simulation verify the feasibility of early fault detection for medium voltage lines. The simulation shows short-circuit faults can be detected in 400μs. On basically, according to the necessary in the controlled fault current interruption to predict the zero-cross point of fault current, a a geometric dc component recursion fault current prediction algorithm is put forward based on the early fault detection. After the early fault detecting, zero-cross points will be predicted in about half a cycle of sampling time. Though the simulation on fault initial angle varied from 0° to 180°and signal contained harmonic and noise on Matlab, the results show that the zero-cross point error is less than 0.5ms, meeting the needs of controlled interruption technology. Finally, Compact-RIO measurement and control system verified the quickness and the effectiveness of early detection and zero prediction via dynamic model laboratory experiments.

Key words： early detection controlled interruption zero-cross point prediction short-circuit faults

Published: 27 July 2016

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	Articles by authors
	Wu Qiaoling
	Miao Xiren
	Xu Huoju
	Guo Moufa

Cite this article:

Wu Qiaoling,Miao Xiren,Xu Huoju等. Research on Phase Switch Early Fault Detection and Zero Prediction Method[J]. Electrical Engineering, 2016, 17(7): 24-30.

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http://dqjs.cesmedia.cn/EN/Y2016/V17/I7/24

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