Predictive control algorithm technique with reduced number of calculation for asymmetric multilevel converter with floating cells

This paper proposes an algorithm technique for an asymmetric cascaded multilevel converter with one floating cell with reduced number of calculation. This control approach permits a unique DC source generate three-phase current with one main cell and one floating cell per phase. Main cells are handled by using a space vector control and floating cells are controlled by a predictive control algorithm technique. Floating capacitors voltages are controlled to maintain an asymmetry to maximize the number of load voltage levels with a reduce number of calculation, selecting only near vectors of previous solution. Results are presented in simulations.