Study of fault location for parallel transmissions lines using one terminal current traveling waves

This paper discusses the application of fault location using one terminal traveling wave for parallel transmission lines. With proper phase module transformation, parallel lines can be decomposed to the same directional net and the reverse directional net. This paper analyzes the propagation characteristics of traveling waves in the reverse directional net, and derivates the refraction coefficient at the fault point for a single phase fault firstly and strictly. In addition, the module selection is also discussed. Simulation results show that satisfactory accuracy can be acquired with the proposed method. Moreover, it is immune to fault types, fault resistances, and the outside system parameters.