A Study of Symmetrical and Unsymmetrical Short Circuit Fault Analyses in Power Systems

Abstract

In this study, thecommon symmetrical and unsymmetrical short circuit faults in power systems areanalyzed detailed. Unlike the similar studies in the literature, metallic faultconditions for unsymmetrical faults are also given in the paper additionally. Forthis aim, a short circuit analysis algorithm is created for the analysis ofboth three phase short circuit, line-to-line short circuit with faultimpedance, metallic line-to-line short circuit, double line-to-ground shortcircuit with fault impedance, metallic double line-to-ground short circuit,line-to-ground short circuit with fault impedance and metallic line-to-groundshort circuit. The obtained algorithm is established as software in MATLAB. Thealgorithm is applied on a sample power test system and the results are given.

Keywords

• electric power system
• short circuit analysis
• symmetrical components
• symmetrical faults
• unsymmetrical faults