Voltage regulation system design for the four-wire voltage-converter with split DC link capacitor

This paper presents the voltage regulation system design for the four-wire voltage converter with split DC link capacitor. The voltage regulation system is used to control the DC side voltages on a three-leg voltage source converter connected to the AC mains. It accomplishes the total DC voltage regulation and voltage sharing across capacitors. System modelling and compensators syntheses are realized and presented. Simulation and experimental results are shown enabling to highlight the behaviour and robustness of the control systems proposed.