某高压变电站35 kV母线PT频繁烧毁及炸裂故障分析

Analysis of Frequent Burning and Burst Failure of 35 kV Bus PT in a High Voltage Substation

在不同电压等级高压变电站的6~35 kV母线运行中,测量电压数据或输出保护信号的电磁式电压互感器是一个重要的电力设备,在运行中会因系统出现谐振而烧毁,将严重影响变电站整体运行的稳定性,甚至引起大范围的停电事故。以某开关站出现的问题为例进行分析,并提出改进意见,以供参考。

In the operation of 6~35 kV bus lines of different high voltage substations,the inductive voltage transformer on which the voltage signal measures or outputs the voltage data is an important power device,which will burn down due to the resonance of the system in operation,result in seriously affects the stability of the overall operation of the substation,and even causes a large range of power failure accident.Taking the problems of a switchyard as an example,this paper analyzes and puts forward improvement suggestions for reference.