Analysis of Fuzzy Control Constant Current Charging Characteristic for Breaking and Making Capacitor of Permanent Magnet Circuit Breaker

doi:10.16182/j.issn1004731x.joss.201807027

Abstract

Abstract: In order to realize the precise control of breaking and making capacitors constant current charging for the permanent magnet (PM) circuit breaker, a fuzzy constant current charging technology of breaking and making capacitors is put forward. On the basis of analyzing the working characteristics for breaking and making capacitors constant current charging, the membership functions of current deviation e, deviation changing rate e_c and output variable u for breaking and making capacitors constant current and fuzzy control rules are set up. The establishment of a two-dimensional lookup table replacing the complex fuzzy control algorithm can effectively improve the fuzzy constant current control system in real time. Matlab simulation model and intelligent control unit of constant current charging system for PM circuit breaker are built and developed. The simulation and experiment results show that the fuzzy control method can achieve the constant current charging control of breaking and making capacitors and can effectively improve the charging speed and lifetime of PM circuit breaker capacitors.

Key words: PM circuit breaker, breaking and making capacitors, fuzzy constant current charging, fuzzy algorithm and two-dimensional table, intelligent control unit

CLC Number:

TM572

Peng jin, Wang Xianbing, Wang Xiangao, Ye Xichen, Wang huan. Analysis of Fuzzy Control Constant Current Charging Characteristic for Breaking and Making Capacitor of Permanent Magnet Circuit Breaker[J]. Journal of System Simulation, 2018, 30(7): 2648-2655.

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