Detection of Power System Faults in Distribution System Using Stockwell Transform

Abstract

Distribution lines are the lifeblood of the power delivery. When a fault is detected on the distribution line, the protective relay must respond quickly to isolate the faulted line to preserve the stability of the rest of the system. Accurate estimation of these fault location are desirable for inspection, maintenance, and repair of the actual fault. An algorithm based on the Stockwell Transform has been proposed in this paper for the detection and classification of the power system faults such as line to ground (LG), double line (LL), double line to ground (LLG) and three phase fault involving ground (LLLG). The faults have been detected and discriminated from each other based on the proposed fault index. The proposed study has been carried out in the MATLAB/Simulink environment using the IEEE-13 bus test system.