A Novel Traveling Wave Based Fault Location Algorithm for Teed-Circuits

Abstract

Based on the traveling wave fault location principle, the traveling wave fault location method of Teed circuit is studied, and the idea of comprehensively using the three-terminal measurement data of Teed-circuit for fault location is proposed, and a new criterion for fault branch identification and a new method for fault location are proposed accordingly. The branch identification criterion considers the influence of the actual fault location error factors on the branch misjudgment to ensure the validity of the branch identification; and the proposed fault location method makes full use of the three-terminal measurement data of Teed-circuit. Meanwhile, the influence caused by the uncertainty of wave velocity on the fault location result is eliminated in the fault location expression, and the fault location error caused by the line sags is eliminated to a certain extent. The ATP/EMTP simulation results show that the method proposed in this paper can accurately identify fault branches and locate fault points on Teed-circuit.