Single phase to ground fault location based on phase of zero-sequence current

With the continuous development of society and the improvement of people´s life, people are increasingly concerning about the safe operation of the power grid, and single phase to ground fault of distribution networks is one of the problems. Because more branch of distribution networks and complex structure, the traditional methods can´t achieve satisfactory results. An on-line fault location method that based on phase information of zero-sequence current is proposed for the single phase to ground fault in the distribution network. The distribution networks is divided into many sections, and transmitted the information to the central station through wireless communication networks, then judging the faulty region by analyzing the phase information of zero-sequence current and the structure of the distribution network, without additional signals. Simulation of MATLAB proves the feasibility of the method.