Current balance control in a multilevel current source inverter

Abstract

Multilevel converters constitute a high performance and high reliability option for industrial applications such as motor control, transmission and distribution electrical systems, and interface with alternative energy sources and non-conventional storage systems. The biggest challenge about multilevel topologies is the balance of dividing reactive components (capacitors in voltage converters, and inductors in current converters). In this paper, two methods to force current balance in a Multilevel Current Source Inverter (MCSI) are presented. Both require minimum computing power with excellent closed loop dynamic response.