摘要
研究了 Bd-小波的时频调节特性 ,结合放电脉冲的时频特性 ,得到适合于提取放电脉冲的 Bd-小波。利用该小波研究了局放脉冲在小波域的特征 ,提出了利用小波变换从强电磁干扰环境中提取放电脉冲的方法 ;研究了利用该方法从连续周期性干扰和白噪声干扰中提取放电脉冲的可行性。最后从实际测量到的现场干扰中提取了放电脉冲 。
The time frequency characteristics of Bd wavelet are studied. Combining the time frequency characteristics of discharge pulse, a Bd wavelet is obtained which is suitable for pickingup thedischargepulse. By use of thiswavelet the features of partialdischargepulse in thewavelet transform domain is researched, and a method of picking up discharge pulse from strong electromagnetic interference environment by use of wavelet transform is put forward. The possibility of picking up the discharge pulses from continuous periodical interference and white noise interference by this method is simulated respectively. Finally, the discharge pulse is picked up from the measured interference on site; and the feasibility and practicability of the presented method is verified.
出处
《电网技术》
EI
CSCD
北大核心
2001年第1期8-12,共5页
Power System Technology
关键词
Bd-小波
时频特性
局部放电
电磁干扰
Bd-wavelet
time-frequency characteristic
PD
electromagnetic interfereence
