Time-frequency Analysis of Partial Discharge Signal Based on VMD and Wigner-Ville Distribution

doi:10.16182/j.issn1004731x.joss.201802025

Abstract

Abstract: To effectively analyze the time-frequency characteristics of partial discharge signals of high voltage electrical equipment, a novel time-frequency analysis method based on variational mode decomposition (VMD) and Wigner-Ville distribution (VMD-WVD) was proposed, which effectively solves the problem of cross term interference in the Wigner-Ville distribution method. The known partial discharge signals were decomposed by VMD and the mode components were extracted. These Wigner-Ville distributions of mode components were computed and the Wigner-Ville of each component signal was added linearly to reconstruct the Wigner-Ville of the original signal. The proposed method was applied to analyze simulation signals and measured partial discharge signal. The time-frequency results of the proposed method effectively restrain the cross terms of Wigner-Ville distribution, and guarantee a high energy aggregation and good time-frequency resolution. Its merit of proposed method shows that VMD-WVD is an effective time-frequency distribution for analyzing partial discharge signals.

Key words: partial discharge, Wigner-Ville distribution, variational mode decomposition, time frequency analysis

CLC Number:

TM85

Jia Yafei, Zhu Yongli, Wang Liuwang. Time-frequency Analysis of Partial Discharge Signal Based on VMD and Wigner-Ville Distribution[J]. Journal of System Simulation, 2018, 30(2): 569-578.

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