DC voltage control strategy for a five-level converter

Author

Ishida, Takashi ; Matsuse, Kouki ; Sugita, Katsuhiko ; Huang, Lipei ; Sasagawa, Kiyoaki

Author_Institution

Meiji Univ., Kawasaki, Japan

Volume

15

Issue

3

fYear

2000

fDate

5/1/2000 12:00:00 AM

Firstpage

508

Lastpage

515

Abstract

This paper describes a control method for a three-phase five-level diode-clamp pulse width modulation (PWM) converter considering DC-link capacitor voltage balancing problem. The proposed control circuit uses multiband hysteresis comparators (MHCs) to simplify the control of the main circuit. The DC-link capacitor voltage balancing problem is solved by changing the shape of the MHC. The proposed method can (1) overcome voltage imbalance at the DC-link capacitors; (2) achieve a 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); power factor; voltage control; DC voltage control strategy; DC-link capacitor voltage balancing; DC-link capacitors; electric power regeneration; five-level converter; multiband hysteresis comparators; nearly sinusoidal input currents; rectifier-inverter system; three-phase diode-clamp PWM converter; unity power factor; Capacitors; Circuits; Diodes; Hysteresis; Power system simulation; Pulse width modulation; Pulse width modulation converters; Reactive power; Shape; Voltage control;

fLanguage

English

Journal_Title

Power Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0885-8993

Type

jour

DOI

10.1109/63.844511

Filename

844511