G.JAYA CHANDRA, MR.V.V.NARAYANA REDDY, D.YEDUKONDALU,J.V.LOKESH 03 03 Power quality disturbances such as voltage sag swell and interruptions significantly affect sensitive loads in power distribution systems This paper proposes a Dynamic Voltage Restorer DVR capable of mitigating these disturbances without employing conventional controllers such as P PI PID fuzzy logic or neural networks The proposed DVR consists of a battery energy storage system Voltage Source Inverter VSI LC filter series injection transformer and control circuitry for pulse generation The threephase supply voltages are transformed into the DirectQuadratureZero DQ0 reference frame and compared with reference values to generate error signals Under normal operating conditions no compensating voltage is injected During disturbances the detected error signals are processed through inverse DQ0 transformation to generate switching pulses for the VSI enabling appropriate voltage injection to restore the load voltage to its rated value Simulation results obtained in MATLABSimulink demonstrate the effectiveness of the proposed DVR in mitigating balanced and unbalanced sags swells and single and threephase outages Copyright (c) Journal of Science Engineering Technology and Management Science. All rights reserved 2026