Control of Dynamic Voltage Restorer (DVR) Using Instantaneous Symmetrical Component for Voltage Sag/Swell Mitigation

Abstract

Abstract-Power quality is one of the major concerns in the era of power system. To overcome this problem, Dynamic Voltage Restorer (DVR) is used, which eliminate voltage sag and swell in the distribution line, it is efficient and effective power electronic device. The size of DVR is small, cost is low and fast dynamic response to the disturbance. By injecting an appropriate voltage, the DVR restores a voltage waveform and ensures constant load voltage. The compensating signals are determined dynamically based on the difference between desired and measured values. The proposed control strategy is simulated in MATLAB software using simulink and sim power system toolboxes.