Elimination of DC-Link Current Ripple for Modular Multilevel Converters With Capacitor Voltage-Balancing Pulse-Shifted Carrier PWM

Author

Fujin Deng ; Zhe Chen

Author_Institution

Dept. of Energy Technol., Aalborg Univ., Aalborg, Denmark

Volume

30

Issue

1

fYear

2015

fDate

Jan. 2015

Firstpage

284

Lastpage

296

Abstract

The modular multilevel converter (MMC) is attractive for medium- and high-power applications because of its high modularity, availability, and power quality. In this paper, the current ripple on the dc link of the three-phase MMC derived from the phase-shifted carrier-based pulse-width modulation scheme is analyzed. A control strategy is proposed for the current ripple elimination. Through the regulation of the phase-shifted angles of the carrier waves in the three phases of the MMC, the current ripple on the dc link of the three-phase MMC can be effectively eliminated. Simulations and experimental studies of the MMC were conducted, and the results confirm the effectiveness of the proposed current ripple elimination control.

Keywords

PWM power convertors; electric current control; capacitor voltage-balancing pulse-shifted carrier PWM; control strategy; current ripple elimination; current ripple elimination control; dc-link current ripple elimination; modular multilevel converters; phase-shifted angles; phase-shifted carrier-based pulse-width modulation; power quality; three-phase MMC; Capacitors; Educational institutions; Pulse width modulation; Switches; Voltage control; Capacitor voltage balancing; control strategy; modular multilevel converter (MMC); ripple elimination;

fLanguage

English

Journal_Title

Power Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0885-8993

Type

jour

DOI

10.1109/TPEL.2014.2322913

Filename

6813698