Investigation on Fault Analysis in A Distributed Generation System

Abstract

Fault level analysis in the power distribution system is a crucial area of research in the field of power system protection. Increasing complexity has led to a huge rise in the rate of symmetrical and unsymmetrical defects, which in turn has led to more frequent tripping of circuit breakers. Thus, it is important to assess the system that can quickly recognize the power system fault in which failure is more likely in transmission and distribution lines owing to symmetrical and unsymmetrical faults; otherwise, the reliability and quality of services provided to consumers would suffer. Thus, it is vital to have a relay that can detect power system defects so that power outages may be fixed more quickly. In order to execute the short circuit analysis and overcurrent relay coordination, MiPower software is used. The 14-bus distribution system is subjected to a Short Circuit Analysis (SCA) that takes into consideration different kinds of DGs. This is accomplished by factoring in four distinct conditions: Relay coordination is performed after determining the fault level in four distinct scenarios: Case 1, a bus connected only to the grid; Case 2, a bus with solar DG sources; Case 3, a bus with wind DG connection; and Case 4, a bus with a hybrid mix of multiple kinds of generations. The purpose of relay coordination is to provide a main and secondary line of defence against any distribution system failure. Using the fault current and fault MVA data from the SCA, we can calculate the amount of time the relays in the system are on.