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

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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 time-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.

Key words： Partial discharge denoising generalized S-transform narrow-band noise maximum local energy method white Gaussian noise singular value decomposition

Received: 22 January 2016 Published: 12 May 2017

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TM835

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	Liu Yushun
	Zhou Wenjun
	Li Pengfei
	Wang Yong
	Tian Yan

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Liu Yushun,Zhou Wenjun,Li Pengfei等. Partial Discharge Ultrahigh Frequency Signal Denoising Method Based on Generalized S-Transform Modular Time-Frequency Matrix[J]. Transactions of China Electrotechnical Society, 2017, 32(9): 211-220.

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https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2017/V32/I9/211

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