Short Circuit Analysis of Six Bus Power System

This paper is approached for the study of Short circuit for detecting maximum fault current for the improvement of power system. Paper provides the solution for the three phase to ground fault in a power system which consists of six buses, two transformers, two generators and five transmission line. Six Bus systems are considered for Short Circuit Analysis. The system could face the damage of equipments as well as interruption of power supply to consumers due to the flow of very high current through transmission line and buses during the faults. So to sort out such problem these types of faults must be analysed by Short Circuit Analysis and System Equipments must be rated in accordance. This paper presents the short circuit analysis of described power system due to three phase to ground fault in the bus no.5 of the system followed by a contingency of single line (3- 6)open. In this Contingency analysis initially load flow analysis is done to obtain the power flow in the complete system which is followed by short circuit studies. In this paper short circuit studies done on the system gives us the maximum fault current and fault MVA rating which helps in relay setting, coordination and setting up the overall protection system.