摘要
提出了一种用于电力变压器局部放电在线检测中滤除周期性干扰 (利用形态开、闭组合形态滤波器 )和白噪声干扰 (利用小波模极大值法 )的形态学 小波综合滤波新方法。仿真结果表明该方法对干扰的噪声抑制比 (NNR) >80dB ,而现场实测的NNR >30dB。
A novel integrated morphology-wavelet filter is used for suppressing PDs field noise. At first, a kind of morphological opening and closing combination filter is designed which is applied to filter periodic narrow bandwidth noise. Then wavelet singularity analysis is applied to remove white noise. Simulation and field measurement results show that the NNR is more than 80 dB and 30 dB respectively.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2004年第2期29-31,共3页
High Voltage Engineering
