Title
A Modified Modular Multilevel Converter with Reduced Capacitor Voltage Fluctuation
Abstract
The requirement of a large number of sizeable capacitors in traditional modular multilevel converter (MMC) submodules is seen as a major barrier hampering its widespread use in medium-voltage applications. In order to reduce the value of capacitance, this paper presents a modified modular multilevel converter (M-MMC) topology which offers inherent alleviated capacitor voltage fluctuations compared to traditional MMC. Its operating principle, modulation and capacitor voltage balancing strategies are described in detail. Besides, a novel capacitor voltage fluctuation suppression scheme is also proposed to further reduce the second-order capacitor voltage ripples. Finally, both a three-phase prototype of M-MMC and traditional MMC have been built in the laboratory. Effectiveness of the proposed M-MMC topology and control methods is verified experimentally by comparing with the traditional MMC.
Year
DOI
Venue
2015
10.1109/TIE.2015.2423665
IEEE Trans. Industrial Electronics
Keywords
Field
DocType
Capacitors,Fluctuations,Voltage fluctuations,Voltage control,Topology,Converters,Voltage measurement
Capacitor,Control engineering,Pre-charge,Electronic engineering,Voltage regulation,Decoupling capacitor,Voltage multiplier,Engineering,Electrical engineering,Voltage regulator,Voltage divider,Dropout voltage
Journal
Volume
Issue
ISSN
PP
99
0278-0046
Citations 
PageRank 
References 
4
0.49
13
Authors
6
Name
Order
Citations
PageRank
Binbin Li1106.52
Yi Zhang240.49
Gaolin Wang310416.33
Wei Sun441.16
Dianguo Xu529237.51
Wei Wang6238.30