Dynamic Voltage Restorer (DVR) for Power Quality Improvement in Power System: A Review

Power Quality is an essential concern in the modern power system that can affect consumers and utility. The integration of renewable energy sources, smart grid systems and extensive use of power electronics equipment caused innumerable problems in the modern electric power system. Current and voltage harmonics, voltage sag, and swell can damage the sensitive equipment. one of the methods by which power quality problems might be addressed is to apply power electronic devices in the form of custom power devices. One of such devices is Dynamic Voltage Restorer (DVR) which is connected in series to distribution networks Dynamic Voltage Restorer (DVR) is a potential Distribution Flexible AC Transmission System (D-FACTS) device widely adopted to surmount the problems of non-standard voltage, current, or frequency in the distribution grid. It injects voltages in the distribution line to maintain the voltage profile and assures constant load voltage. This paper reviews on the application of DVR for Voltage Compensation.