Investigation of Control Strategies of Svc to Improve Voltage Profile in Grid System

In this paper the control strategies of svc are described.SVC is used to stabilize the voltage profile in a grid system.In the designing of SVC there is a combination of three TSC’s and one TCR.The SVC consists of a group of shunt connected capacitor banks and inductors with fast speed of response afforded by thyristor switching. The SVC provides the required amount of reactive power compensation at its point of connection by adjusting the fundamental frequency components of the current drawn by the TCR. Depending on the equivalent reactance, i. e. capacitive or inductive, the SVC is capable of either drawing or supplying reactive power. In this paper the control strategies of SVC is described at different conditions of system voltage that how it controls the grid voltage at different conditions. Keywords— {Flexible a.c.transmission system(FACTS), Static var compensator(SVC), Thyristor controlled reactor(TCR), SVC Controller, Thyristor switched capacitor(TSC), Power electronics, Thyristors etc}.