Voltage Sag Mitigation Using Static VAR Compensator

Voltage sag is defined as a decrease of RMS Voltage from 0.1 to 0.9 per unit (pu) for a duration of 0.5 cycles to 1 minute. Voltage sags are caused by short circuit faults on the system, transformer energizing, overloads and starting of large motors. In this paper voltage sag due to short circuit faults such as Line-to-ground, Line-to-Line, three Phase-to-ground faults are created in the power system network using MATLAB SIMULINK. This project deals with modeling and simulation of static var compensator(FC-TCR) in order to mitigate the voltage sag occurred due to short circuit faults. To implement Automatic control circuit of SVC using MATLAB SIMULINK and observe the simulation results with and without Automatic control circuit.