介绍了在役500 kV变电站单相式超高压变压器局部放电的声发射定位检测技术。阐述了变压器局部放电声发射定位检测的试验原理和试验方法, 现场对500 kV超高压变压器的局部放电进行了声发射定位检测, 找出了局部放电部位, 并对试验数据进行了分析, 检测结果与电测局部放电测试试验及绝缘油气相色谱分析(DGA)结果吻合。声发射定位检测技术可有效应用于在役大型电力变压器局部放电的实时在线带电检测和监测。

The main purpose was to introduce the acoustic emission location testing for partial discharge of in-service 500 kV extra high voltage transformers. The principle and method of acoustic emission location testing were discussed. The partial discharge of 500 kV extra high voltage transformer was tested by acoustic emission location testing technology and the position of partial discharge was found. The testing data was analyzed and it was consistent with result of electric partial discharge testing and dissolving gas analyzing. So the acoustic emission location testing technology can be used effectively to monitoring and testing on line to the partial discharge of huge in-service electric transformer.