Voltage Sag Compensation Using Synchronously Reference Frame Theory Based Dynamic Voltage Restorer

This paper showcases one of the custom power device which is used to recover the voltage sag mostly occur at distribution system is Dynamic Voltage Restorer. The method applied to control this device is based on Synchronously Reference Frame theory to generate switching pulses for three phase inverter with the help of hysteresis voltage controller to maintain voltage profile sinusoidal at linear load terminal against voltage sag. The simulation of DVR model is performed in MATLAB software.