摘要
在介绍小波包变换算法的基础上,将小波包变换用于白噪声干扰下的气体绝缘组合电器(GIS)局部放电信号提取。对模拟的局部放电信号进行了小波包分解与重构的计算机仿真研究,分析了不同的局部放电波形、噪声水平及采样率对去噪结果的影响,最后对GIS内置传感器实测波形进行了小波包变换去噪。
A decomposition and reconstruction algorithm based on wavelet packet theory is presented to reject the white noise in acquired gas insulated substation (GIS) partial discharge signal. The disturbance partial discharge signal in GIS is designed, in which the extraction of signal is studied with different partial discharge signals, level of noise and sampling rate. The practical noised partial discharge signals are disposed by wavelet packet transform finally.
出处
《电力系统自动化》
EI
CSCD
北大核心
2004年第5期25-29,共5页
Automation of Electric Power Systems
基金
重庆市科技攻关项目(7795)。
关键词
局部放电
气体绝缘组合电器
白噪声
小波包变换
partial discharge
gas insulated substation (GIS)
white noise
wavelet packet transform
