Research And Application Of Transmission Line Fault Location

Fault location techniques are used to pinpoint location of the fault on a tra-nsmission line.Transmission line faults must be located accurately to allow maintena-nce crew to arrive at the scene and repair the faulted section as soon as possible,which can relief the burdens of patrol personnel and reduce the revenue losses due to power outage.The accurate fault location alogrithms play an important role in power system safety,economy and reliability.In this paper,diversified fault location algorithms are summarized.According to the principles of algorithms,they can be classified into two categories: impedence based algorithm and traveling wave based algorithm.Based on the analysis and comparission of each algorithm,the corresponding merits and app-lication limitations are presented. An assembled fault location scheme is brought up and the simulation results by ATP show good performance. Finally,the prospects in the research and application of fault location algorithms are described.