三相电机与变频器负载电路中并联电弧故障的特征增强与提取方法

The parallel arc fault is one of the most important causes of electrical fire. However, there is no effective detection method for parallel arc fault. To solve this problem, a fault feature enhancement method based on energy transformation and reconstruction of modal components and a fault feature extraction method based on non-negative matrix factorization were proposed. First, the parallel arc f...