Real Time Short Circuit Fault Analysis of a Sub-Station by Soft Computing

Abstract

Most of the faults on the power system lead to a short–circuit condition. As our power system runs at uncertain constraints so it is impossible to maintain uninterrupted power supply due to random occurrence of faults. Now a day, Power Industries depend on reliability constraints but due to faults they are impossible to maintain because our system operates in grid networks. Any malfunctioning lines are capable to make other lines malfunction. So, to maintain one grid in one nation it is mandatory to analyse each and every faults in power system lines whether it may be symmetrical or unsymmetrical. So in this paper we are trying highlight analysis of power system faults and its responses. In a feeder or distribution line the main aim is to supply power uninterruptedly by maintaining its systems’ security and stability. So we are analyse a short circuit condition in a distribution network by ETAP software and give an idea of importance of short circuit analysis in power system. Because short circuit analysis will give us a clear idea of short circuit current in every buses which help us design and development of protection equipment in substation. ETAP (Electrical Transient Analysis and Program) is well known software to analyse a short circuit and transient fault. It is not possible for analysis of short circuit fault in high voltage live (transmission/distribution) lines so we can easily analyse short circuit by ETAP software where we can test, design and analyse a high voltage line by soft computing methods and find out easily its parametric values. For that reason we chose ETAP software for short circuit analysis. The analysis of this paper is based on real live system (132/33/11kv) of Kalyani Substation of West Bengal. All the data used for these analyses are collected from 132/33/11kv substation under the W.B.S.E.T.C.L.