SIMULATION VERIFICATION OF DYNAMIC VOLTAGE RESTORER USING HYSTERESIS BAND VOLTAGE CONTROL

Abstract

Dynamic Voltage Restorer (DVR) is one of the custom power devices that are used as an effective solution for the protection of sensitive loads against voltage disturbances in power distribution system. The efficiency of the DVR depends on the performance of the efficiency control technique involved in switching the inverters. Unlike previous approaches, this paper presents a hysteresis voltage control technique of DVR based on unipolar Pulse Width Modulation (PWM). The hysteresis voltage control has a very fast response, simple operation and variable switching frequency. To evaluate the quality of the load voltage during the operation of DVR, it is controlled by hysteresis voltage control techniques with various Hysteresis Band (HB). The validity of proposed method and achievement of desired compensation are confirmed by the results of the simulation in MATLAB/ SIMULINK.