Fault location of hybrid distribution lines based on empirical mode decomposition

This paper presents a fault location method for cable hybrid distribution lines based on EMD and TEO algorithm. Firstly, the fault signal is decomposed by EMD. Then, the transient energy spectrum of high frequency imf1 component is obtained by using Teager energy operator. The first energy singularity is the time when the fault initial traveling wave head reaches the detection point. Finally, the fault location is carried out according to the fault search algorithm based on time variable. According to the simulation results, EMD and TEO methods have better fault extraction ability and higher accuracy in fault location.