500 kV变压器工频耐压试验击穿故障的分析与处理

Analysis and Treatment of the Breakdown Accident in AC Withstand Voltage Test of a 500 kV Power Transformer

结合电气、化学等多类型试验以及击穿套管的解体检查,对一起500 kV变压器修后工频耐压试验击穿事故进行分析处理,查找事故原因。文章突出了高压试验的重要性,为同类型故障排查工作开展提供典型案例和经验借鉴价值。

Combined with electrical,chemical and other types of tests and bushing disassembling inspection,the breakdown accident in AC withstand voltage test of a 500 kV power transformer after overhaul was analyzed and the cause of the accident was found.The importance of high voltage electric test was emphasized in this paper,which provided typical cases and reference value for the same type of troubleshooting work.