Fault location method for 66KV transmission line based on fault region search

In order to solve the disadvantages of the traditional transmission line fault location method, such as high location error rate and long location output time, this paper proposes a 66KV transmission line fault location method based on fault region search. Traveling wave method is used to build mathematical model of 66KV transmission line and the model is used to determine the fault section and fault distance, when the fault distance is greater than the segment length, thinks that fault occurred in the downstream, at this time to need to divide the fault area, the fault location is determined by fault area search method, to complete the 66KV transmission line fault location. Experimental results show that the average error rate of transmission line fault location is 2%, and the average output time of positioning results is only 0.38s, the proposed method has higher positioning accuracy and better real-time positioning.