一起35 kV电磁式电压互感器故障仿真与分析

Simulation and Analysis on a Fault of 35 kV Electromagnetical Voltage Transformer

对一起35 k V电磁式电压互感器(以下简称"PT")的故障原因进行分析,通过现场检查、解体检查及仿真分析,发现故障原因是由于线路侧发生扰动,改变了系统运行方式,使PT工作在谐振区域,在过电压和过电流的共同作用下,最终造成PT损毁,提出了相应建议。

An analysis on a fault of 35kV electromagnetical voltage transformer is given in this paper.By means of the on site check,decomposition check and simulation,the cause for the fault is found that line side disturbance changed the system operation mode.It made the voltage transformer worked in the resonance area and result in the damage of the voltage transformer under over voltage and over current.Suggestions to avoide the fault are also given.