CT饱和造成主变差动速断保护误动作的故障分析

Analysis of failure in differential transformer protection caused by saturation

通过对某变电站实际发生主变外部故障进行分析,结果表明,CT饱和导致主变差动速断保护误动作。并探讨CT饱和的原因,提出了具体解决方案,对现场继电保护人员与设计人员具有一定的参考作用。

This paper suggested some specific solutions to the failure in differential transformer protection caused by saturation after an analysis of a previous accident of transformer protection and expected to provide reference for relay protection technicians and designers.