电流二次回路两点接地造成母差异常告警的处理与分析

摘要

母线保护是变电站继电保护系统中的一个重要的组成元件，但由于现场接线错误或由于电流回路的虚接地造成CT二次回路两点或多点接地的现象时有发生。通过一次异常事故处理，详细分析了两点接地的原理以及危害。并提出检查两点接地的方法。%Busbar protection is an important part in the relaying protection system of a transformer substation, but field wiring mistakes or false grounding of current circuits often lead to two-point or multi-point grounding of CT secondary loops. Through handling of an abnormal failure, the mechanism and harm of two-point grounding are analyzed in detail and method for checking two-point grounding is provided.