doi:10.16186/j.cnki.1673-9787.2020.3.13

Received:2019/08/22

Revised:2019/10/19

Published:2020/05/15

Analysis on tripping performances of AC-type leakage circuit breaker underpulsating DC residual current

LI Qian1,2 LI Kui1,2, WANG Yao1,2, WANG Tianshuo1,2, LIN Jingyi1,2

1.State Key Laboratory ofReliability and Intelligence ofElectrical Equipment，Hebei University of Technology，Tianjin  300130，China;2.Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability of Hebei Province，Hebei University of Technology，Tianjin  300130，China

Abstract:The leakage current of power electronic equipment system presents non-sinusoidal characteristic as the faults appears， and this has influence on the operation characteristics of the leakage breaker. The characteristics of pulsating DC residual current were analyzed， and the mathematical model of AC residual current transformer was established to analyze the influences of DC component on the output of residual current transformer. The dynamic simulation model of residual current transformer was established in MATLAB/Simulink. The typical detection and protection circuit of AC-type leakage circuit breaker was analyzed， and it was revealed that the distortion of the output signal of transformer was the main reason for the change of tripping performances. The action characteristics of the AC-type leakage circuit breaker were tested， and the results showed that the AC-type leakage circuit breaker failed to trip off under the pulsating DC residual current

Key words:leakage current protection;residual current;AC-type leakage circuit breaker;transformer;pulsating DC residual current

脉动直流剩余电流下AC型漏电断路器动作特性分析_李倩.pdf