摘要:研制了GIS局部放电超高频在线监测系统,针对局部放电(PD)信号提取时面临的复杂干扰因素,提出在GIS盆式绝缘子处外置超高频(UHF)传感器耦合GIS泄露的PD信号、噪声传感器耦合周围噪声水平,借助信号处理电路对二者获取的信号进行阈值比较、数字滤波和相位对比,进而剔除外来干扰,提取真实有效PD信号的干扰抑制方案。通过现场应用实例,验证了本文所提干扰抑制方案的有效性。
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