间歇性局部放电引起高压电抗器色谱异常分析

Analysis on Abnormal Oil Chromatography Caused by Intermittent Partial Discharge in High Voltage Shunt Reactor

对一起750 kV高压并联电抗器油色谱异常缺陷进行分析。通过长时间色谱在线监测与离线检测分析,判断电抗器中缺陷为间歇性局部放电。利用多手段局部放电联合检测,准确定位缺陷并根据其间歇性特点分析可能的放电原因。对该电抗器进行吊罩检查及实验室模拟试验,验证了缺陷类型、位置及原因。

Analysis was made to the abnormal oil chromatography of a 750 kV high-voltage shunt reactor. By analyzing the long time online monitoring and off-line detection of the oil chromatography, it was judged that the defect in the reactor was intermittent partial discharge. Multiple methods were taken to detect the partial discharge to correctly locate the defect. According to the intermittent characteristics, this paper analyzed the possible causes of the discharge. The defect type, location and reason of the mentioned reactor were verified by the hoist checking and the laboratory simulation.