UVTG based Dynamic Voltage Restorer for mitigation of voltage sag

Voltage dips or sag creates useless conflict at the customer side as well as utility side. In this paper, dynamic voltage restorer device based on voltage source converter (VSC) topology is used to compensate voltage sag. Dynamic Voltage Restorer (DVR) is a power electronic device that is utilized to improve voltage stability i.e. to reduce the power quality problems in electrical power system network. Usually DVR is installed between load feeder and source in the distribution system. In this paper approach to compensate voltage sag by using dynamic voltage restorer base on unit vector template generation (UVTG) is discussed. Simulation is done in MATLAB software and results are obtained.