A Travelling Wave Fault Location Method for Active Distribution Network

Aiming at the active distribution network with distributed generations (DGs), this paper proposes a single-ended travelling wave fault ranging method using transient signals generated by DGs after the fault. When a short circuit fault occurs in the distribution network and all DGs exit, a certain DG is used to inject transient signals to the system. Based on the improved E-type travelling wave fault ranging method, the propagation velocity and fluctuation attenuation of the travelling wave are analyzed to obtain an appropriate frequency range for location. The simulations of the travelling wave fault ranging algorithm under the influence of factors such as hybrid lines and branching points are carried out to verify its effectiveness. The results show that the proposed method has high location accuracy for short circuit fault in active distribution network.