中文摘要：

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。

英文摘要：

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.