电工技术学报2017，Vol.32Issue(9)：211-220,10.
基于广义S变换模时频矩阵的局部放电特高频信号去噪方法
Partial Discharge Ultrahigh Frequency Signal Denoising Method Based on Generalized S-Transform Modular Time-Frequency Matrix
刘宇舜 1周文俊 1李鹏飞 1王勇 2田妍2
作者信息
- 1. 武汉大学电气工程学院 武汉430072
- 2. 广州供电局有限公司 广州510620
- 折叠
摘要
Abstract
In order to suppress the noise in the partial discharge (PD) ultrahigh frequency (UHF) signal,a denoising method based on generalized S-transform modular time-frequency matrix is proposed.Maximum local energy method was used to extract the characteristics of periodic narrow-band interference and cancel the interference through the matrix reverse separation based on two-dimension modular tine-frequency matrix.In addition,singular value decomposition was used to suppress of Gaussian white noise in the PD signal.The denoising method presented in this paper was applied on the simulation and laboratory measured signals.Compared the denoising results with other four traditional denoising methods,the results show that the method presented in this paper suppressed the noise in the PD UHF signal effectively and retained more characteristics of PD signal.Compared with traditional methods,the denoising results of filed test signal validated the effectiveness of extracting PD signal with higher noise reduction ratio and lower amplitude reduction ratio.关键词
局部放电/去噪/广义S变换/窄带干扰/区域最大能量法/高斯白噪声/奇异值分解Key words
Partial discharge/denoising/generalized S-transform/narrow-band noise/maximum local energy method/white Gaussian noise/singular value decomposition分类
信息技术与安全科学引用本文复制引用
刘宇舜,周文俊,李鹏飞,王勇,田妍..基于广义S变换模时频矩阵的局部放电特高频信号去噪方法[J].电工技术学报,2017,32(9):211-220,10.
