Fault location method for MV cable network

This paper presents a method for estimating the location of faults on a radial MV system, which can include many intermediate load taps. In the method nonhomogeneity of the feeder sections is also taken into account. Performance of the technique was investigated using data obtained from EMTP/ATP simulations, based on Dommel (1986). The data recorded during faults in a real MV network were also used. A distribution utility´s MV networks are used as an example. The voltage and current data samples obtained from EMTP/ATP simulations or delivered by DFR were converted to a MATLAB format. The 1 kHz sampled data were then used in the MATLAB fault locator model. The basic block diagram of the proposed fault locator is presented. The paper also describes some evaluation results