Fault investigation methods on power transmission line: A comparative study

In this paper, the authors have carried out fault investigation in Power Transmission Line using three different techniques: Simple impedance method, Travelling wave method and Wavelet Multi-Resolution Technique. Different realistic fault cases at different locations have been done but L-L fault is considered for this investigation. A two terminal 400kV transmission line fed by two generators model is simulated with MATLAB for all the three different techniques. The authors believe that the technique employed here is generally applicable to determine fault in any multi terminal transmission line.