摘要
分析总结了局部放电在线监测数据及现场干扰抑制的经验,基于变压器油中局部放电特征的试验研究提出了小波变换局部放电干扰抑制法。该法充分利用局部放电信号特征,采用多尺度分析及多工频周期叠加方法抑制干扰。数据处理结果表明该法可有效抑制现场局部放电测量中的白噪、周期性窄带及随机性脉冲干扰。
This paper analyzes the characteristics of on-line PD Detecting data and summarizes some experiences for interference suppression. The experimental research was also carried out in the laboratory to study the PD characteristics in transformer oil. Based on the above studies, a new method is put forward to suppress interferences for online PD monitoring. The method makes use of PD characteristics and adopts the techniques of the multi-dimension analysis and multi-cycle superimposition. The processing results for on-line measured data show that the proposed method can suppress the white noise interferences, narrow-band interferences, random pulse-type interferences.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2005年第11期10-12,30,共4页
High Voltage Engineering
关键词
局部放电
在线监测
小波变换
干扰
partial discharge
on-line monitoring
wavelet transform
