徐永干;姜杰;唐昆明;张太勤;罗建;谢敏;

• 1:输配电装备及系统安全与新技术国家重点实验室(重庆大学)
• 2:重庆新世纪电气有限公司
• 3:四川大学电气信息学院

摘要(Abstract)：

针对高压设备局部放电信号的周期性窄带干扰抑制问题,提出一种基于Hankel矩阵和奇异值分解的窄带干扰抑制方法。首先,通过染噪局部放电信号采样序列构造Hankel矩阵,作为轨迹矩阵,并对其做奇异值分解;研究窄带干扰奇异值分解的规律,并在该规律的基础上利用奇异熵增量和K均值算法找出窄带干扰对应的奇异值,对窄带干扰进行重构;得到窄带干扰后,从染噪信号中将其除去,获得只含有白噪声的局放(partial discharge,PD)信号。对染噪局部放电仿真信号、实测信号进行窄带干扰抑制,并与改进FFT阈值法、小波降噪的结果进行对比分析。结果表明:该方法对窄带干扰的抑制效果更好,波形相似度更高。

关键词(KeyWords)： 局部放电;窄带干扰;Hankel矩阵;奇异值分解;K均值算法

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(51577018)~~

作者(Author): 徐永干;姜杰;唐昆明;张太勤;罗建;谢敏;

Email:

DOI: 10.13335/j.1000-3673.pst.2019.1064

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