高频脉冲电流法在氧化锌避雷器带电局放检测中的运用

Application of High Frequency Pulse Current Method in Live Partial Discharge Detection of Zinc Oxide Arrester

针对怀疑存在内部绝缘缺陷的避雷器,采用了高频脉冲电流法的方式,进行带电局部放电检测,发现了常规阻性电流及红外检测等常规带电测试方法不能发现的问题,并结合解体检查,验证了测试的有效性和准确性。同时,通过对局部放电产生的原理和特征分析,确认了一些无害的放电特征图谱,找出了可能导致严重后果的放电特征图谱。这次的测试结果为今后开展避雷器局部放电带电检测,提供了参考依据。

For lightning arresters suspected to have internal insulation defects,high-frequency pulse current method is adopted to carry out live partial discharge detection.Problems that cannot be found by conventional live testing methods such as conventional resistive current polar infrared detection are found.Combined with disassembly inspection,the effectiveness and accuracy of the test are verified.At the same time,through the analysis of the principle and characteristics of partial discharge,some harmless discharge characteristic maps have been confirmed,and the discharge characteristic maps that may lead to serious consequences have been found.The results of this test provide a reference basis for conducting live detection of arrester partial discharge in the future.