In order to obtain the fault information,the transient current signal is split into M bands using parallel multi-rate filter banks,and the energy of every band is computed.

• 为了提取故障信息,先用平行结构的多速率滤波器组,将故障暂态电流信号并行分割为M个窄带信号,然后算出各窄带分量的能量。