串联故障电弧检测方法的研究  

Research on the Detection Method of Series Arc Fault

作　　者：刘晓明[1] 王丽君[1] 赵洋[1] 王昊 

机构地区：[1]沈阳工业大学电气工程学院,辽宁沈阳110870 [2]荏原机械(中国)有限公司,北京100026

出　　处：《电气开关》2014年第1期13-18,共6页Electric Switchgear

基　　金：国家自然科学基金资助项目(50877048);辽宁省教育厅优秀人才支持计划资助项目(LR2011002)

摘　　要：提出了一种基于小波包能量熵的故障电弧检测方法,该方首先计算电流信号的小波包能量熵对故障电弧电流信号的能量分布进行定量描述,然后,提取故障电弧电流与正常工作电流的能量熵比值,并将其作为故障发生的判据。结果表明,该方法能有效提取串联故障电弧电流的时频特征,为串联故障电弧的诊断和检测提供了一种新途径。A detection method of arc fault was put forward based on the wavelet packet-energy entropy, the current signal wavelet packet-energy entropy was calculated first to describe the energy distribution under different frequency bands of arc fault current, and then the energy entropy ratio of the fault and the normal current were extracted and was as a failure criterion. The results show that this method can effectively extract the time-frequency characteristics of series arc fault current and realize the detection of the failure, provide a new way for diagnosis and detection of the series arc fault.

关 键 词：串联故障电弧 故障检测 电气火灾 小波包能量熵 

分 类 号：TM501[电气工程—电器]