A generalised approach to the modulation of current source inverters

Abstract

The two major DC/AC power converter topologies are the voltage source inverter (VSI) and the current source inverter (CSI). The VSI has been widely investigated for optimum operation, but the CSI has not been so well studied. A major limitation for the CSI is the availability of modulation strategies with the sophistication and performance of their VSI counterparts. This paper presents a generalised method for adapting any VSI modulation strategy to control a CSI, so that the wealth of knowledge and experience associated with VSI modulation can be immediately applied to a CSI without requiring any further analysis.