Fault Location for 10kV Distribution Line Based on Traveling Wave - DC Theory

In this paper, the traditional fault location methods are analyzed, especially the C-type traveling wave location method; and a new composite method was presented which is based on traveling wave DC theory. The new method integrates the C-type of traveling wave location method with DC signal injection one. The aim is to combine different location methods to improve the accuracy of fault location. The new fault location method has two steps, the first step is determining the fault distance accurately by C-type of traveling wave location method; the second one is locating the fault branch by DC signal injection method. After theoretical analysis, ATP simulation, the composite location method is irrelevant to limits of the network dissymmetry, distributed capacitance and line parameter, can accurately determine the distribution network single-phase-to-earth fault location.