A novel topology and control strategy of modular multilevel converter (MMC)

Author

Gao, Chun ; Jiang, Jianguo ; Yang, Xingwu ; Xie, Liang ; Cao, Kai

Author_Institution

Dept. of Electr. Eng., Shanghai Jiao Tong Univ., Shanghai, China

fYear

2011

fDate

16-18 Sept. 2011

Firstpage

967

Lastpage

971

Abstract

Modular multilevel converter (MMC) is a newly introduced topology of multilevel converter, which is based on cascade connection of chopper-cells per leg. This paper presents a novel topology of MMC, in which, based on traditional topology of MMC, H-bridge (HB) cells are used for more levels of output voltage. Corresponding control strategy is presented and explained in details, including phase-disposition (PD) sinusoidal pulse width modulation (SPWM) strategy, control methods on H-bridge cells and chopper-cells, and several controls on capacitor voltage balancing. Output voltage levels of novel topology are twice as many as those of traditional one by proposed strategy. The validity of the novel topology as well as the control strategy proposed in this paper is confirmed by computer simulation.

Keywords

PWM power convertors; control engineering; H-bridge; MMC; SPWM; chopper-cells per leg; control strategy; modular multilevel converter; multilevel converter topology; phase-disposition sinusoidal pulse width modulation; Analytical models; Capacitors; HVDC transmission; Modulation; Silicon; Topology; Voltage control; H-bridge; Multilevel converter; capacitor-voltage balancing;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical and Control Engineering (ICECE), 2011 International Conference on

Conference_Location

Yichang

Print_ISBN

978-1-4244-8162-0

Type

conf

DOI

10.1109/ICECENG.2011.6057270

Filename

6057270