MATLAB files (.mdl) for study of NNPC inverter
A capacitor voltage-balancing method for a nested neutral point clamped (NNPC) inverter is proposed in this paper. To control and balance flying capacitor voltages the proposed capacitor voltage-balancing method takes advantage of redundancy in phase switching states. The proposed method needs very few computations and also easy to implement. The NNPC inverter is a newly developed four-level voltage source inverter for medium-voltage applications.