A REVIEW ON MULTILEVEL VSC TOPOLOGY

Abstract

In electrical power system, Flexible AC Transmission System (FACTS) Devices provides better performance than conventional controllers. Voltage Source Inverter (VSI) based devices are more favorable FACTS controllers. In last couple of decades, many control technologies for VSC have been proposed. In this review paper, authors have categorized different control algorithm, switching schemes and converter topologies. Different multilevel converter schemes are proposed for the better performance of the Voltage Source Converter. Cascade Hbridge multilevel converter topology gives the better results than other topologies. For multilevel converter conventional PI, FUZZY controller, FUZZY-PI and FUZZY-PID controllers are used. The application of multilevel topologies in different FACTS devices has be discussed in the reviewed publications.