王春宁,张赢,陈楷,马宏忠

• 1:江苏省电力公司南京供电公司
• 2:河海大学能源与电气学院

摘要(Abstract)：

该文对变压器振动情况进行理论分析,设置绕组短路故障,在正常和故障两种状态下进行多次实验,测量正常和故障两种状态下的振动信号。提出一种基于小波-高低频包络谱能量分布提取振动信号特征并确定绕组匝间短路故障阈值的新方法。首先应用小波变换对振动信号进行降噪处理,然后与希尔伯特变换结合,提取振动信号的低频和高频包络,最后对包络信号进行谱分析和能量特征提取,比较正常运行状态和短路故障状态下的能量分布。通过实验得到了故障阈值,表明能量法可用于故障的监测和诊断。

关键词(KeyWords)： 变压器;振动;绕组短路;小波变换;包络谱

Abstract:

Keywords:

基金项目(Foundation): 国家电网公司科技资助项目(2011-0810-2251)

作者(Author): 王春宁,张赢,陈楷,马宏忠

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