Power Quality Improvement Using Dynamic Voltage Restorer with Hysteresis Voltage Control Technique for Power Distribution System

Abstract

Power quality is one of main factor in present time. It has become important, with the introduction of
power electronics devices, whose performance is very sensitive to the quality of power supply. Power quality problem
is disturbance of voltage, current or frequency that results in a failure of end use equipment. One of the major
problem here is the voltage sag. Sensitive industrial loads and utility distribution networks all suffer from various
types of outages and service interruptions which may result in a significant financial 1oss. To improve the
power quality, custom power devices are used. The device described in this work is DVR. This work present the
analysis and simulation of a Dynamic Voltage Restorer using MATLAB and hysteresis voltage control technique is
used for the control purpose. The role of DVR to compensate load voltage is investigated during the different fault
conditions like voltage sag, single line to ground, double line to ground faults.