基于小波阈值的局部放电白噪声去噪方法综述  

Review on Partial Discharge Denoising Method of White Noise Based on Wavelet Thresholding

作　　者：何平 何若冰 陈佳[2] 杨旭[2] 唐炬[3] 周思远[3] HE Ping;HE Ruobing;CHEN Jia;YANG Xu;TANG Ju;ZHOU Siyuan(Yangjiang Power Supply Bureau of Guangdong Power Grid Co.,Ltd.,Yangjiang,Guangdong 529500,China;Wuhan NARI Limited Liability Company of State Grid Electric Power Research Institute,Wuhan,Hubei 430074,China;School of Electrical Engineering and Automation,Wuhan University,Wuhan,Hubei 430072,China)

机构地区：[1]广东电网有限责任公司阳江供电局,广东阳江529500 [2]国网电力科学研究院武汉南瑞有限责任公司,湖北武汉430074 [3]武汉大学电气与自动化学院,湖北武汉430072

出　　处：《广东电力》2020年第11期83-90,共8页Guangdong Electric Power

基　　金：国家自然科学基金项目(51977158);广东电网有限责任公司科技项目(031700KK52170017)。

摘　　要：小波阈值去噪法在电力设备局部放电(partial discharge,PD)信号去噪中被广泛应用,对此从母小波函数的选择、阈值的选取以及阈值函数的构造等几个方面对国内外关于该方法的最新研究成果进行综述,讨论如何利用检索法确定母小波函数、改进固定阈值与阈值函数的各种方法、改进自适应阈值与阈值函数的各种方法,并对今后的研究方向进行展望,指出可以尝试用其他方式自动生成母小波函数,同时也指出电磁环境复杂的现场可能不只是有白噪声,可以结合小波阈值法与其他方法进行联合去噪,从而取得更为精确的结果。Wavelet threshold denoising method is widely used in partial discharge(PD)denoising for electrical apparatus.This paper reviews the latest research results of this method at home and abroad in three aspects of mother wavelet selection,threshold value determination and threshold function construction.It also discusses how to determine mother wavelet by the retrieval method,as well as methods to improve fixed and adaptive threshold function.Finally,it puts forward further research prospect.The paper points out that other methods can be taken to automatically generate mother wavelets,and there may exist other noises besides white noise in the complex electromagnetic environment.It suggests to combine the wavelet threshold method with other methods for joint denoising to obtain more accurate results.

关 键 词：局部放电 小波阈值 白噪声 去噪 综述 

分 类 号：TM83[电气工程—高电压与绝缘技术]