融合超高频及脉冲电流法的局部放电监测系统

Partial discharge monitoring system based on ultra-high frequency method and pulse current method

基于脉冲电流法和超高频法的基本原理和特点,研制出融合超高频法及脉冲电流法的局部放电监测系统。系统采用简易的超高频信号波形转换装置,将超高频信号转换成方波信号作为脉冲电流传感器的触发信号,避开了超高频方法需要高速采集和海量存储的缺点。与传统的脉冲电流法比较,系统有效地去除了局部放电信号中所包含的脉冲型干扰。实验结果表明该系统可以准确地识别局部放电及干扰信号,有针对性地找出干扰源并有效地去除干扰信号。

A PD（Partial Discharge） monitoring system is developed based on the fundamental principles and characteristics of ultra-high frequency method and pulse current method ,which transforms the ultra-high frequency signal into square signal by a simplified waveform conversion device and uses it as the triggering signal of pulse current transducer to avoid the high-speed data acquisition and mass storage needed by the ultra-high frequency method. Compared with the traditional pulse current method,it effectively removes the impulse interference from the PD signals. Experimental results show that the system recognizes PD accurately,finds out the interference sources and removes the interference signal effectively.