Title :
DC voltage control strategy for a five-level converter
Author :
Matsuse, Kouki ; Sugita, Katsuhiko ; Ishida, Takashi ; Huang, Lipei ; Sasagawa, Kiyoalu
Author_Institution :
Dept. of Electr. Eng., Meiji Univ., Kawasaki, Japan
Abstract :
This 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
Keywords :
PWM power convertors; comparators (circuits); control system analysis; control system synthesis; voltage control; DC voltage control strategy; DC-link capacitor balancing; control design; control performance; control simulation; diode-clamped circuits; electric power regeneration; five-level PWM power converter; multiband hysteresis comparators; nearly sinusoidal input currents; power systems; unity power factor; voltage imbalance; Capacitors; Circuits; Diodes; Hysteresis; Power system simulation; Pulse width modulation; Pulse width modulation converters; Reactive power; Shape; Voltage control;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 1999. APEC '99. Fourteenth Annual
Conference_Location :
Dallas, TX
Print_ISBN :
0-7803-5160-6
DOI :
10.1109/APEC.1999.749731
