利用FFT功率谱抑制窄带干扰的改进方法

2013 IEEE International Conference on Solid Dielectrics (ICSD) Pub Date : 2013-10-08 DOI:10.1109/ICSD.2013.6619806

Xin Luo, H. Niu, Juzhuo Wu

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引用次数: 8

摘要

抑制窄带干扰是局部放电在线监测的关键技术之一。在分析有窄带干扰和无窄带干扰时PD信号的FFT功率谱特征的基础上，定义了部分峰值和部分能量比。为此，提出了一种利用部分能量比预处理抑制窄带干扰的方法，并详细介绍了具体步骤。对部分能量比的大小进行模糊化，提出自适应模糊c均值阈值算法提取部分能量比的阈值。降噪结果表明，该方法能较好地去除实际PD信号中的窄带干扰。

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A modified method of suppressing narrow-band interference using FFT power spectrum

Suppressing narrow-band interference is one of the key techniques of partial discharge (PD) on-line monitoring. Based on the characteristics analysis of FFT power spectrum of PD signals with and without the narrow-band interference, the partial peaks and partial energy ratio is defined. Thus, a method of suppressing narrow-band interference using partial energy ratio pretreatment is proposed, and the steps are also detailed. Besides, the magnitude of partial energy ratio is fuzzified and the adaptive fuzzy C-mean threshold algorithm is proposed to extract the threshold of partial energy ratio. The denoising results show that the proposed method could pick narrow-band interference from the real PD signal.

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2013 IEEE International Conference on Solid Dielectrics (ICSD)

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