Application of Shannon Wavelet Entropy and Shannon Wavelet Packet Entropy in Analysis of Power System Transient Signals

被引：17

作者：

Chen, Jikai ^{[1
]}

Dou, Yanhui ^{[1
]}

Li, Yang ^{[1
]}

Li, Jiang ^{[1
]}

机构：

[1] Northeast Elect Power Univ, Sch Elect Engn, Jilin 132012, Jilin, Peoples R China

来源：

ENTROPY | 2016年 / 18卷 / 12期

关键词：

Shannon wavelet entropy; Shannon wavelet packet entropy; power system; transient power signals; wavelet aliasing; accuracy of the feature extraction; TRANSMISSION-LINE; SINGULAR ENTROPY; FAULT-DETECTION; CLASSIFICATION; PROTECTION;

D O I：

10.3390/e18120437

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In a power system, the analysis of transient signals is the theoretical basis of fault diagnosis and transient protection theory. Shannon wavelet entropy (SWE) and Shannon wavelet packet entropy (SWPE) are powerful mathematics tools for transient signal analysis. Combined with the recent achievements regarding SWE and SWPE, their applications are summarized in feature extraction of transient signals and transient fault recognition. For wavelet aliasing at adjacent scale of wavelet decomposition, the impact of wavelet aliasing is analyzed for feature extraction accuracy of SWE and SWPE, and their differences are compared. Meanwhile, the analyses mentioned are verified by partial discharge (PD) feature extraction of power cable. Finally, some new ideas and further researches are proposed in the wavelet entropy mechanism, operation speed and how to overcome wavelet aliasing.

引用

页数：14

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