一起低压电抗器差动保护误动分析与解决

Analysis and Solution of Misoperation of A Low Voltage Reactor Differential Protection

文章分析了一起低压并联电抗器差动保护误动事故,通过现场录波数据仿真分析,证明了大量非周期分量的存在,使电抗器两侧电流互感器传变特性不一致,导致了差动保护动作。而通过基于参数识别的并联电抗器保护方法的现场数据仿真分析,解决了低压并联电抗器保护中存在的这一问题。

The paper analyzes the misoperation of a low voltage shunt reactor differential protection .The simulation analysis of the recorded wave data , proves the existence of a large number of non periodic component , making the inconsistent of transfer characteristics on both sides of the current transformer , to cause the misoperation of the differential protection .The simulation analysis of the recorded wave data proves the method of shunt reactor protection based on parameter identification can solve successfully the problem existing in the low voltage shunt reactor protection .