Performance evaluation of three-phase, three wire DVR for power quality improvement

The Dynamic Voltage Restorer (DVR) is the series connected Custom Power Device (CPDs) to compensate voltage based distortions such as voltage sag, swells, unbalance and harmonics, flickers etc. for a linear & non-linear sensitive load. In this paper, a three-phase three wire battery supported DVR is considered to compensate voltage sag, swells, unbalance, harmonics and their combinations in supply voltage for linear loads. A well known Synchronous Reference Frame Theory (SRFT) has been used to generate the required voltage injection by DVR. MATLAB/SIMULINK based simulation results are demonstrated to verify the performance of battery supported DVR.