对一起换流站交流滤波器低端电容器击穿事故分析

摘要:

就一起换流站交流滤波器低端电容击穿事故展开分析，利用 PSCAD/EMTDC 软件建立电容器的电磁暂态模 型开展仿真计算，得到了故障相的操作过电压，最后根据计算结果找出了故障原因，并为避免类似故障再次发生提出 改进建议。

Abstract:

A breakdown accident of a lower capacitor of AC filter that happened in a converter station is introduced． A simulation model of electromagnetic transient is established with PSCAD/EMTDC for the capacitor to analyze the process of the accident，thus the switching overvoltage of fault phase is obtained． And the fault reason is found out according to the calculation results，which gives the improvement suggestions to avoid the similar accident again