浙江电力

2020, v.39;No.285(01) 47-52

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电流互感器拖尾电流快速检测算法研究
Research on Current Transformer Trailing Current Identification Method Based on Fast Amplitude Algorithm

刘宏君,俞伟国,谢俊,李勇
LIU Hongjun,YU Weiguo,XIE Jun,LI Yong

摘要(Abstract):

理论分析TA(电流互感器)拖尾电流的特点,提出一种对TA拖尾电流的快速检测算法,利用非周期分量的特点,对电流值进行二次求导,在保证周期分量幅值不变的情况下,衰减直流分量变小。提出在1/4周期内积分判据快速识别故障电流消失。仿真分析结果证明了快速检测算法的可行性。
Based on the theoretical analysis of tailing current characteristics of current transformer, a method for fast identification of current transformer tailing current is proposed in this paper. Because of the features of the non-periodic component of the current, second derivative is carried out, which shrinks down the decreased component, simultaneously maintaining the periodic component amplitude unchanged. Besides, onequarter integral criteria are proposed to identify whether the fault current is disappeared or not. The simulation results show the feasibility of the fast detection method.

关键词(KeyWords): 断路器;失灵保护;电流互感器;TA拖尾
breaker;failure protection;current transformer;current transformer tailing

Abstract:

Keywords:

基金项目(Foundation): 国家电网有限公司华中分部重点科技项目(SGHZ0000DKJS1800137)

作者(Author): 刘宏君,俞伟国,谢俊,李勇
LIU Hongjun,YU Weiguo,XIE Jun,LI Yong

DOI: 10.19585/j.zjdl.202001008

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