摘要详情

ID / 提交时间

622 / 2017-05-15 19:30:53

标题

Research on the control strategy of fiber-optic current transformer for DC Circuit Breaker

关键字

14318,13546,14319,14320,14358

主题及专题

全体主题

状态

全文待审

作者

Zhongxiao Ji / Electrical Engineering School of Xi’an Jiaotong University

YiFei Wu / Xi'an Jiao Tong University

Yi Wu / Xi'an Jiao Tong University

Fei Yang / State Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, China

Chunping Niu / State Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, China

摘要

Abstract： The fiber-optic current sensor for DC circuit breaker becomes more and more important in order to measure the transient fault current accurately. The optimized control strategy of fiber-optic current transformer (FOCT) is investigated in this paper. The transfer function of the closed-loop control system used in FOCT is established at first, in which the key influence factors of transient response are analyzed in detail. The control strategy is verified in the prototype of FOCT for 10kV DC circuit breaker. The experiment result shows that the rise time of step response is less than 30μs and the accuracy reaches 0.5 grade. Meanwhile, the measured transient current of FOCT agrees well with that of Hall current sensor.