Enhancement of Power System Transient Stability Using Static Var Compensator

Abstract

Power systems are continuously subjected to various types of disturbances which in turn cause the problem of losing stability. As the problem of transient stability is a crucial issue, the tools for mitigating such a sensitive problem have an important significance. Static VAR Compensator (SVC) can control reactive power and therefore is used to improve transient stability as well as the voltage profile. In this paper the mathematical model of the power system equipped with an SVC is systematically derived and the parameters of the SVC are modeled into the power flow equations and used in the control strategy, the SVC is modeled in a 5-bus system and a 30-bus system and implemented in Newton-Raphson load flow algorithm in order to control the voltage of the bus to which the SVC is connected to in a MATLAB written program, the contribution of the SVC to transient stability was tested and verified.