变压器局部放电检测方法研究

Research on Transformer Partial Discharge Detection Method

变压器局部放电故障检测在变压器故障检测中占据重要的一环,对电网安全稳定运行有着重大意义。近年来,对局部放电检测的研究越来越多,本文介绍了几种局部放电故障检测的常用方法,提出利用PRPD图谱对变压器局部放电信号检测过程中的放电信息进行特征提取,根据局部放电实验得到的数据绘制了相应的PRPD图谱。PRPD图谱能够反映局部放电几乎全部的放电信息,将PRPD图谱与已知缺陷图谱进行对比从而判断局部放电缺陷类型。

Transformer partial discharge fault detection plays an important role in transformer fault detection, and is of great significance to the safe and stable operation of power grids. In recent years, there have been more and more studies on partial discharge detection. This paper introduces several common methods of partial discharge fault detection, and proposes to use PRPD spectrum to extract the characteristics of discharge information in the process of partial discharge signal detection of transformers. According to partial discharge experiments, the resulting data plots the corresponding PRPD spectrum. The PRPD spectrum can reflect almost all the discharge information of partial discharge, and the PRPD spectrum can be compared with the known defect map to determine the type of partial discharge defect.