Simulation validation of design of single-phase multi-level cascaded h-bridge shunt current injection power converter

This paper describes the detailed design procedure for a single-phase multi-level cascaded h-bridge shunt current injection converter. Special attention is given toward the proper selection of inductors and capacitors, trying to optimize the selected component values. The proposed control is extensively treated and inner current and outer voltage loops are completely analyzed. Furthermore, voltage balancing is included into the control to assure dc voltage control for each H-bridge module. Analytical expressions, which describe the design procedure, are derived, making the presented analysis more complete. The designed converter is simulated using detailed switching simulation model and excellent agreement between theory and simulation results are obtained.