电测与仪表2017，Vol.54Issue(8)：28-32,5.
改进阈值函数的小波熵方法抑制局部放电白噪声的研究
Suppressing white noise research in PD signal based on wavelet entropyand improved threshold function
许佳 1牛海清 1郑文坚 1余佳 1吴炬卓2
作者信息
- 1. 华南理工大学,广州 510640
- 2. 珠海供电局,广东 珠海 519000
- 折叠
摘要
Abstract
Aiming at the shortcomings of traditional hard threshold method and soft threshold method, this paper puts forward a wavelet de-noising method based on wavelet entropy and improved threshold function.Firstly, the noisy partial discharge (PD) signals are processed by wavelet decomposition, and then, the wavelet coefficients are processed by a new improved threshold function using adaptive selection of threshold based on wavelet entropy, finally, the de-noised signal can be obtained by reconstruction.The de-noising results of typical simulation signals and the field signals reveal that this proposed method can effectively remove white noise in partial discharge.关键词
小波去噪/小波熵/改进阈值/局部放电/白噪声Key words
wavelet de-noising/wavelet entropy/improving threshold/partial discharge/white noise分类
信息技术与安全科学引用本文复制引用
许佳,牛海清,郑文坚,余佳,吴炬卓..改进阈值函数的小波熵方法抑制局部放电白噪声的研究[J].电测与仪表,2017,54(8):28-32,5.
