Simultaneous Amplification of Generator Power and Damping of Oscillations using the Static VAR Compensator (SVC)

Abstract

In this paper, to provide the required grid reactive power the Static VAR Compensator (SVC) is used instead of the reactive power capacity produced by generator. Besides, a PID controller is used in order to control the SVC performance. Despite the fact that the SVC instead of the generator supplies the grid reactive power, however by optimal determination of the controller coefficients, the generator oscillation power which is due to the fluctuations in the grid load can be also preferably controlled. Therefore, the SVC can be applied for reactive power supply in addition to simultaneous damping of oscillations. There are various methods to determine the PID controller coefficients according to the optimization problem. Among all the optimization methods, the Genetic Algorithm is used to determine the controller coefficients due to its simplicity and accuracy. The minimization of the real part of the eigenvalue associated with the generator speed oscillations is considered as the target function of optimization problem and this optimization is performed by Genetic Algorithm. As a final point, this idea is implemented on an experimental Single-Machine Infinite Bus (SMIB) system.