电测与仪表2016，Vol.53Issue(11)：13-18,6.
基于变分模态分解和小波分析的变压器局部放电去噪研究
Research on denoising of transformer partial discharge based on variational mode decomposition and wavelet analysis
摘要
Abstract
In order to effectively remove the electromagnetic interferences in transformer partial discharge ( PD) sig-nals, this paper proposes that applying a new signal decomposition algorithm—variational mode decomposition ( VMD) and wavelet to transformer PD signal to suppress the periodical narrow-band interferences and white noise be-cause of the problems of empirical mode decomposition such as modal aliasing .Firstly, VMD can decompose noisy signal into several modes , which are compact around a center pulsation respectively , and the white noise is automati-cally filtered out in the decomposition process;then, extract modes which contain PD information for reconstruction , finally, we remove residual periodical narrow-band noises by wavelet denoising so as to realize interference suppres-sion .The analysis results of simulations and measured signals show that the proposed method can eliminate two kinds of interferences well and retain the PD characteristics , it verifies that the approach which uses VMD and wavelet to re-move the interferences is efficient and thus it is fit for PD signal denoising .关键词
变压器/局部放电/信号去噪/变分模态分解/小波去噪Key words
transformer/PD/signal denoising/VMD/wavelet denoising分类
信息技术与安全科学引用本文复制引用
赵磊,朱永利,高艳丰,陈旭,郭小红..基于变分模态分解和小波分析的变压器局部放电去噪研究[J].电测与仪表,2016,53(11):13-18,6.基金项目
中央高校基本科研业务费专项资金资助项目 （）
