Wavelet based detection and location of faults in 400kv, 50km Underground Power Cables

In this paper, a method for detection and location of fault in a power line is presented.This method can be applied for both transmission and distribution power lines of underground cables. The proposed method is capable to determine type of fault the fault location upon its occurrence, based on the data available from the measuring equipment. The algorithm presented uses the fault steady-state data (voltages and currents) and the system parameters, to calculate the fault location. The influence of the fault resistance that depends on the design characteristics of the power line is disregarded. The proposed method has been modeled in mat lab simulink of version 7.8.