变电设备局部放电故障非接触式带电检测方法研究

Research on Non-contact Live Detection Method of Partial Discharge Fault in Substation

针对变电设备故障检测由于受到环境等多因素的干扰,导致检测结果准确率下降的问题,提出一种变电设备局部放电故障非接触式带电检测方法。将局部放电类型划分为气隙放电、沿面放电、悬浮电位放电和电晕放电等多种类型,并设置对应的故障检测标准。综合超声波和光谱技术的抗干扰优势,将其应用至非接触式带电检测传感器安装设计中,利用该设备采集变电设备的相关信号,并提取局部放电的特征量。将特征提取结果与设置的检测标准进行匹配,实现对变电设备局部放电故障检测。测试结果表明,研究方法能够准确获得放电信号,且在干扰环境下该方法的检测准确率较高,具有实用性。

The accuracy of fault detection of substation equipment is reduced due to the interference of environment and other factors.Therefore,a non-contact live detection method for partial discharge fault of substation equipment was proposed here.The types of PD were divided into air gap discharge,surface discharge,suspended potential discharge and corona discharge,and the corresponding fault detection standards were then set.It was applied to the installation and design of non-contact live detection sensor based on the anti-interference advantages of ultrasonic and spectrum technology.The device was used to collect the relevant signals of substation equipment and extract the characteristics of partial discharge.By matching the feature extraction results with the set detection standards,the partial discharge fault detection of substation equipment can be realized.The test results show that the research method can accurately obtain the discharge signal and high detection accuracy in the interference environment.