Performance Analysis of DVR Using ANN Controller for Voltage Quality Enhancement

This paper presents a Dynamic Voltage Restorer to mitigate power quality disturbances such as voltage sag, swell and harmonics. The compensation strategy is based on pre-sag compensation. Controller based on dq0 transformation technique and ANN is implemented in order to maintain the nominal load voltage and phase angle. Simulation studies under three phase rectifier with parallel resistive/capacitive dc load as a non linear load is carried out. Also the system is investigated under voltage sag and swells on source side using programmable AC source. Simulation results show that DVR performs accurately in mitigating disturbances with minimum Total Harmonic Distortion. The performance of DVR is verified using Matlab / Simulink Environment.