Symmetrical and Asymmetrical Fault Analysis of Transmission Line with Circuit Breaker Operation

This paper presents an efficient illustration of symmetrical as well as asymmetrical faults which occur in transmission line. The agenda of this proposed work to identify the effect of different types of fault on transmission line voltage and current. Firstly, a small three phase system is constructed in MATLAB/SIMULINK environment and the voltage and current profiles of transmission line are observed. Then symmetrical and asymmetrical faults likes three phase fault, single line to ground fault (L-G), line to line fault (L-L) and double line to ground fault (L-L-G) are imposed at particular section with specified time period to identify the change in system parameters. Further the circuit breaker operation has been incorporated in that particular section where the fault will occur and it is observed that in spite of occurrence of fault the system is prevented from any failure and also the voltage recovery has taken place.