摘要
分析了变压器局部放电在线检测中局部放电及干扰信号特征 ,根据小波包变换良好的时频局部化特性 ,引入信号子空间范数描述局部放电信号在时频空间中的分布 ,提出了局部放电信号在线检测的小波包变换新算法。理论分析与实验结果表明 ,该算法能有效抑制周期性载波干扰和白噪声 。
In this paper,the characteristics of Partial Discharge(PD) signal and interferences in On-line HV transformer PD detection was analyzed.According to the excellent time-frequency localization properties of the wavelet packet,and introducing the ∞-norm to describe the distribution of PD signal quantitatively in time-frequency space,a new method using wavelet packet is proposed to detect PD signal on line.Theoretical analysis and results of experiment show that this method is available in restraining the periodic(carrier wave)interferences and white noise.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2001年第1期19-21,共3页
High Voltage Engineering
基金
湖南省自然科学基金资助项目
