{DC voltage control strategy for a five-level converter}

Title{DC voltage control strategy for a five-level converter}
Publication TypeConference Paper
Year of Publication1999
AuthorsMatsuse K, Sugita K, Ishida T, Huang L, Sasagawa K
Conference NameApplied Power Electronics Conference and Exposition, 1999. APEC '99. Fourteenth Annual
ISBN NumberVO - 1
KeywordsCapacitors, Circuits, comparators (circuits), control design, control performance, control simulation, control system analysis, control system synthesis, DC voltage control strategy, DC-link capacitor balancing, diode-clamped circuits, Diodes, electric power regeneration, five-level PWM power converter, Hysteresis, multiband hysteresis comparators, nearly sinusoidal input currents, power system simulation, power systems, Pulse width modulation, Pulse width modulation converters, PWM power convertors, Reactive power, Shape, unity power factor, Voltage control, voltage imbalance
AbstractThis paper describes a control method for a diode-clamped three-phase five-level PWM power converter considering the DC-link capacitor balancing problem. The proposed control circuit uses multiband hysteresis comparators (MHCs) to simplify the control of the main circuit. The DC-link capacitor balancing problem is solved by changing the shape of the MHC. The proposed method can: (1) overcome voltage imbalance in the DC capacitors; (2) achieve unity power factor; (3) generate nearly sinusoidal input currents; and (4) regenerate electric power back to the power system. Simulation and experimental results demonstrate the validity of the proposed method