Fuzzy Logic Based Fault Classification Scheme for Digital Distance Protection
Khushboo Sahu · International Journal for Research in Applied Science and Engineering Technology · 2017
In this paper, a fuzzy logic-based fault classification scheme for transmission lines is proposed. The classification procedure is carried out by only post fault current phasor of three phases of the transmission line. The proposed technique is able to classify all the possible types of faults including single-phase to ground, two-phases, two-phases to ground and threephase faults with high accuracy. In addition, this method can identify the faulted phase(s) from non-faulted phase(s). The proposed method has a good performance in high fault resistances, and high fault distances from relaying point. Large numbers of test cases are generated to verify the performance of proposed technique. The simulation studies have been carried out by using MATLAB/SIMULINK. Sim Power Systems and Fuzzy Logic Toolbox have been used from MATLAB.