Modeling and simulation of multilevel current source inverter based on SIMetrix/SIMPLIS

On the basis of SIMetrix/SIMPLIS simulation platform, the computer model of a kind of three-phase multilevel current source inverter (MCSI) was developed by using hierarchy design. In the control system, the multi-carrier PWM modulation strategy was adopted and tested, the current-balance control for intermediate DC-link inductor was implemented on the principle of redundant switching combinations. The reasonability and validity were testified by the coincidence of the simulation and experimentation results and theoretical analysis. This multi-level hierarchy modeling method is also suitable for the other power electronics converters and offers a new thinking for designing actual power electronics circuits.