Abstract
Dynamic Voltage Restorer (DVR) is a method of overcoming voltage sag and swell in electrical power distribution. To boost up voltage levels on load side on power disturbances DVR can be used so as the equipment connected will have good voltage profile In this Pulse Width Modulation inverter is in solid-state electronic switching device were employed along with Integrated Gate Bipolar Transistor by the DVR, the alternating current voltage is controllable at real and reactive powers which are made independently. The MLI; is organized as the cascaded H-bridge inverter units. The function of Multilevel Inverter; is to arrange the voltages from a significant direct current source. Here in the DVR, there is no need for external output filters. In the planned DVR, a dc-dc converter is combined with an MLI. By considering the voltage sag magnitude of a dc-dc converter can regulate the dc-link voltage. Hence the output voltage of the multilevel inverter; always has a last number of levels. Instead of using the PWM based technique, the fundamental frequency method can be used in the multilevel inverter. The proposed DVR operation range of mathematical analysis is specified in detail. The simulation results are prepared by using Simulink/MATLAB.
Highlights
Voltage variations are unsafe for all electronic devices, computers, and automated systems
The Dynamic Voltage Restorer (DVR) operation based on the cascaded H-bridge multilevel inverter (CHB) multilevel inverter has minimum power, from the control method point of view, and it has been studied in [9]
The simulation of the proposed DVR is done in Simulink/MATLAB software
Summary
Voltage variations are unsafe for all electronic devices, computers, and automated systems. There are different types of compensation of voltage sags that have been used, but here only one method is used that is DVR with energy storage can be used to control power quality problems [5]. The voltage source inverter (VSI) is connected to the DVR in series with a series injection transformer (SIJ) during voltage sag [8]. The DVR operation based on the cascaded H-bridge multilevel inverter (CHB) multilevel inverter has minimum power, from the control method point of view, and it has been studied in [9]. The dc voltage source is connected to each of the H-bridge in the CHB multilevel inverter only; one dc voltage source is required. The output voltage of the multilevel inverters rests on the depth of the voltage sag.
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