Realization of cascaded H-bridge 5-Level multilevel inverter as Dynamic Voltage Restorer

Abstract

This paper presents a modern industrial devices are mostly based on electronic devices such as programmable logic controllers and electronic drives. The electronic devices are very sensitive to disturbances and become less tolerant to power quality problems such as voltage sags, swells and harmonics. In this multi level inverter is used because to improve output voltage like Voltage Profile & Reduce Total Harmonic Distortion compared to voltage source inverter, Due to the power quality issues like voltage sag, voltage swell, unbalanced voltage, voltage flickering, Interruptions etc. load side voltage is not constant. The main requirement of any system is to maintain load side voltage constant. Among the entire power quality issues, voltage sag and voltage swell occupy a major role. So my paper deals with compensating different power quality issues at load side using 5-level multi level inverter as a Dynamic Voltage Restorer.