摘要
分析了电力变压器局部放电在线监测中局放信号及白噪声的特征.引出了时—频功率谱的概念.研究了自相关函数的小波变换及它与时—频功率谱的关系.提出了利用小波分析去除变压器局部放电在线监测中的白噪干扰的方法.
The characteristics of partial discharge (PD) signal and white noise at on - line transformer monitoring are analyzed. The concept of time - frequency power spectrum is introduced. The relations between the time- frequency power spectrum and wavelet transformation of selfcorrelation function are also studied. A method for eliminating white noise by wavelet analysis is suggested.
出处
《高压电器》
CAS
CSCD
北大核心
1999年第3期8-12,共5页
High Voltage Apparatus