在线阅读 --自然科学版 2020年6期《一种用于局部放电信号分析的维格纳分布交叉项抑制方法》
一种用于局部放电信号分析的维格纳分布交叉项抑制方法--[在线阅读]
范佳兴1, 范杰清2
1. 内蒙古电力(集团)有限责任公司 呼和浩特供电局, 内蒙古 呼和浩特 010000;
2. 华北电力大学 电气与电子工程学院, 北京 102206
起止页码: 500--506页
DOI: 10.13763/j.cnki.jhebnu.nse.2020.06.007
摘要
电力设备介质局部击穿产生的放电信号是一种非平稳随机信号.为获得其时频信息,提出了一种维格纳分布交叉干扰项的抑制方法.该方法从维格纳分布时频平面截取数据段进行多项式拟合,根据拟合残差定位交叉干扰项并用二值化数组加以抑制.仿真结果表明,所提出的改进方法在保持维格纳分布自项的同时有效抑制了交叉干扰项,为局部放电信号的时频域分析提供了一种有效方法.

A WVD's Cross-term Suppressing Method for Partial Discharge Signal Analysis
FAN Jiaxing1, FAN Jieqing2
1. Hohhot Power Supply Bureau, Inner Mongolia Power(Group) Company Ltd, Inner Mongolia Hohhot 010000, China;
2. School of Electrical and Electronic Engineering, North China Electric Power University, Beijing 102206, China
Abstract:
The partial discharge signal produced by partial breakdown of insulating medium is a kind of non-stationary random signal.To obtain the time-frequency domain information of partial discharge signal, a suppressing method for WVD(Wigner-Ville distribution) cross-term is proposed.Data segments of the WVD time-frequency plane were used for polynomial fitting.Fitting residual was used in locatingcross-terms which were suppressed by a binary array.The simulation results show this method not only reduces the interfering cross-terms but also preserves the auto-term of the WVD.The improved method is an effective way for partial discharge signal analyzing in time-frequency domain.

收稿日期: 2020-04-23
基金项目: 国家自然科学基金(U1730247,11571047,61372050)

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