电测与仪表2017，Vol.54Issue(22)：6-10,5.
基于小波和高阶PDE的电缆局部放电去噪研究
Research on de-noising of cables partial dischargeb ased on wavelet and high order P DE
汪培培 1莫付江 1赵岗岗 1陈惠 1许梦素1
作者信息
- 1. 江苏大学电气信息工程学院,江苏镇江212000
- 折叠
摘要
Abstract
Partial discharge(PD)test is an important means to detect the insulation performance of power cable.Be-cause the electromagnetic environment of the test site is complicated,the extracted PD signal is submerged by noise. In order to get a more real PD signal,this paper proposes a de-noising method based on wavelet transform and high or-der partial differential equation(PDE).It adopts wavelet transform to provide better pre-processing and post-process-ing platform of partial discharge signal,and utilizes the fourth-order PDE to iterate the low-frequency sub-signal.At the same time,the signal to noise ratio(SNR)is used as the iteration termination condition.The de-noising effect of this method is compared with the traditional wavelet threshold de-noising effect.Finally,the experimental and simula-tion results show that this method can suppress noise effectively and keep the property of edge and detail.It has better de-noising performance than traditional wavelet threshold de-noising method.关键词
局部放电/小波变换/高阶偏微分方程/信号去噪Key words
partial discharge/wavelet transform/higher-order partial differential equation/signal de-noising分类
信息技术与安全科学引用本文复制引用
汪培培,莫付江,赵岗岗,陈惠,许梦素..基于小波和高阶PDE的电缆局部放电去噪研究[J].电测与仪表,2017,54(22):6-10,5.
