高频局部放电检测法在高压电抗器状态检测中的应用

The Application of High Frequency Partial Discharge Detection(HFPDD) in the High-voltage Reactor State Detection

针对高压电抗器在现场中不便进行局部放电检测的问题,提出在实际生产中定期对高压电抗器进行高频局部放电检测的方法来监视其局部放电情况。该方法主要是采用高频电流传感器从高压电抗器的铁芯和夹件的接地线上采集信号,从而实现在运行状态下对高压电抗器的高频局部放电检测。文章首先简要介绍了几种常见的局部放电检测方法,然后论述了高频局部放电检测的原理和分析方法,随后对某750 kV变电站750 kV高压电抗器进行高频局部放电检测,在检测到异常信号情况下对该台电抗器的油色谱数据进行分析,其分析结果验证了高频局部放电检测理论在高压电抗器状态检测中的适用性,验证了该方法的工程可行性。

In order to solve the problem of inconvenient partial discharge detection of high voltage reactor on spot,HFPDD method is recommended to monitor the general state during the actual production at fixed period. This method is supported by the signals which are collected by high frequency current sensor from the iron core of the high voltage reactor and the grounding line of the clamp,so as to realize the HFPDD of the high voltage reactor during the operation. In this paper,several common partial discharge detection methods are briefly introduced. Then the principle and analysis method of HFPDD are discussed. Later a HFPDD for one 750 kV high voltage reactor of 750 kV substation was done,and an analysis of the reactor oil chromatography data from abnormal signals are made. And the analysis results verified the applicability of HFPDD theory in the state detection of high-voltage reactor and the engineering feasibility of the method.