高压并联电抗器带电检测异常分析

Analysis on Abnormal Live Detection of High Voltage Shunt Reactor

针对某变电站高压并联电抗器C_(2)H_(2)体积分数突升故障,采用油色谱跟踪,高频、超高频、超声波局放检测及红外线成像检测等方法,最终确定故障范围,并判断故障可能原因为:X柱上部夹件或与其相连部件发生触碰、松动引起悬浮放电;地屏铜带发生局部断裂或褶皱产生悬浮、绝缘类放电。提出要密切跟踪气体体积分数,局放信号的放电幅值、频次等变化趋势,建议关注并分析各测点间的放电量,充分重视夹件或连接部件、地屏铜带的纵向放电现象。

Aiming at the sudden increase of C_(2)H_(2) of a high⁃voltage shunt reactor volume fraction in a substation,oil chromatography tracking,high⁃frequency,ultra⁃high frequency,ultrasonic partial discharge detection and infrared imaging detection and other methods are used to finally determine the scope of the failure,and determine the possible cause of the failure.The upper part of the column X or its connected parts are touched or loosened,which will cause the suspension discharge;partial fractures or folds of the ground screen copper belt causes suspension and insulation discharge.It is proposed to closely track the gas volume fraction,the signal amplitude and frequency of partial discharge and other changes.It is recommended to pay attention to and analyze the discharge volume of the measuring points,and pay full attention to the longitudinal discharge phenomenon of the clamps or connecting parts and the copper tape of the ground screen.