计算机应用与软件2024，Vol.41Issue(7)：82-87,114,7.DOI:10.3969/j.issn.1000-386x.2024.07.013
基于改进VMD与MAD的局部放电信号去噪方法研究
PARTIAL DISCHARGE SIGNAL DENOISING METHOD BASED ON IMPROVED VMD AND MAD
摘要
Abstract
In order to effectively suppress narrow-band interference and white noise in partial discharge(PD)noise signal,a denoising method for partial discharge signals based on improved variational modal decomposition(VMD)and median absolute deviation(MAD)method is proposed.An improved sliding waveform matching-mirroring algorithm was proposed to suppress the endpoint effect of VMD,and the weighted kurtosis index was constructed to determine the best decomposition mode number in VMD.We eliminated narrow-band interference and white noise according to kurtosis index of each mode after decomposition.MAD was introduced and combined with Savitzky-Golay smoothing filter to further denoise the residual white noise in each mode dominated by partial discharge pulse.Compared with traditional methods,the results of simulation and measurement show that the proposed method can preserve more effective information of partial discharge pulse while suppressing noise more effectively.关键词
局部放电/变分模态分解/峭度/泄漏能量/中位数绝对偏差Key words
Partial discharge/Variational mode decomposition(VMD)/Kurtosis/Leakage energy/Median absolute deviation(MAD)分类
信息技术与安全科学引用本文复制引用
李梦莹,薛亮,袁莎莎,范晶晶..基于改进VMD与MAD的局部放电信号去噪方法研究[J].计算机应用与软件,2024,41(7):82-87,114,7.基金项目
上海市青年科技英才扬帆计划项目(17YF1407000). （17YF1407000）
