基于全电流谐波向量反演的避雷器带电测试方法初探

The Primary Exploration on Live-Line Measurement of Non-Gap Metal Oxide Surge Arresters Based on the All-Current Harmonic Waves Processing

针对目前占主流的容性电流补偿法测试中,不取电压互感器二次信号或者取站用变参考电压信号,带来较大原理性误差的问题,提出一种具有自主知识产权的基于全电流谐波向量反演的避雷器带电测试方法,原理性试验和现场初步测试表明,该方法可实现对阻性电流和谐波电流分量的准确反演,由于该方法只需提取避雷器全电流,可望成为避雷器带电测试简便、安全的解决方案。

Aiming at the problem that there brings large principal deviation without potential transformer secondary signal or based on station transformer reference voltage signal for the dominant capacitive current compensation method,an innovative method for live-line measurement of non-gap metal oxide surge arresters is presented based on the total-current harmonic waves processing. Both the principal test and the site measurement show that it can realize the accurate inversion of both resistive current and harmonic current component. The innovative method is expected to become convenient and safe solution of live-line measurement of non-gap metal oxide surge arresters,for the advantage that it depends only on all-current detection.