摘要
分析了局放信号及各类干扰的特征,引入了相关函数及功率谱的概念,对局放信号及干扰的功率谱进行了研究,提出了利用频域分析识别周期性干扰,并通过数字陷波滤波器抑制周期性干扰的方法。这种新方法特性好,对PD信号失真小,信噪比高,处理时间短等优点。
In the paper, the characteristics of the interferences and PD signal are studied. Their selfcorrelation function and power spectrum are also presented. A new method of suppressing periodic interference through signal selfcorrelation function frequency domain analysis and digital wave trap filter has been proposed. The new method proposed in this paper gives better performance, low distortion to a sequece of PD pulses, higher signalnoise ratios and shorter processing time.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
1998年第2期41-43,共3页
High Voltage Engineering
关键词
局部放电
故障
在线监测
周期性干扰
绝缘
partial discharge power spectrum frequency domain analysis suppressing method