Transient Stability Analysis of Two-Machine Power Systems

摘要

The ability of bringing the power system to its stable operation after the system being disturbed is one of the most important subjects in power generation and control. A loss of synchronization is the result of instability. The angle of rotor in the generator depends on the mechanical power and electrical power. The output power of synchronous machine is linked to the mechanical torque, which is central to the angle stability of rotor. Therefore, maintaining the synchronization due to a small disturbance is the goal during the power generation. In this paper, an analysis of a two-machine power system with 5 buses is provided. The transient stability of the system is investigated by solving the nonlinear dynamical second order differential swing equations in terms of angle stability during the normal operation and after the fault occurs in order to prevent the transmission line, conductors and insulators. It is suggested that the faulty part is to be isolated rapidly from the rest of the system in order to increase the stability margin and decrease damage. The analysis and simulation of the two machine power system with five buses using Matlab are carried out during this study.