Design and Control of Small Scale Laboratory Model of a Thyristor Controlled Series Capacitor (TCSC) to Improve System Stability

Abstract- There are two types of FACTS controllers, series and shunt compensators. Series compensators reduces the transmission line reactance in order to improve Power Flow through it, while shunt compensators improves the Voltage profile.Among the FACTS devices, the TCSC controller has given the best results in terms of performance. If the oscillatory response of a power system during the transient period following a disturbance is damped and the system settles in a finite time to and flexibility. This paper investigates the effects of TCSC on voltage stability improvement and enhancement of Power Transfer Capability. Stability of the System has to be assessed based on P-V Curves for without and with Controller is the basic requirement for maintaining the voltage levels thereby the stability of the interconnected power system. Voltage variations can be stabilized and controlled by providing required reactive power