An Implemented Software for Transient Stability Analysis of SMIB Based on Runge-Kutta Method

Abstract

Single machine infinity bus (SMIB) will be a simple way to examine a complex electrical power system. In investigating the transient stability of a SMIB system, equal area criterion (EAC) method can be used to get critical clearing angle cr and critical clearing time tcr. In each case of a SMIB, critical clearing time tcr. cannot directly be determined using equal area criterion method. This paper will introduce Runge-Kutta method utilized to modify the critical clearing time tcr found with EAC method and to know the best time to clear a fault. In this case, the critical clearing time tcr of EAC method is almost same for every fault and it is faster than the critical clearing time tcr of Runge-Kutta method. A software package was designed to reduce and fasten the routine of calculation. Overall simulation shows that the designed software has worked properly.