Modular multi-level converter topologies: Present status and key challenges

Author(s):  
Ankit Yadav ◽  
S. N. Singh ◽  
S. P. Das
2014 ◽  
Vol 1 (2) ◽  
pp. 166-174 ◽  
Author(s):  
Mohammad Shadab Mirza ◽  
Tufail Mohammad ◽  
Qamar Alam ◽  
Mohammad Ariffuddin Mallick

2016 ◽  
pp. 249-283
Author(s):  
Aleksandar Prodic ◽  
Sheikh Mohammad Ahsanuzzaman ◽  
Behzad Mahdavikhah ◽  
Timothy McRae

2012 ◽  
Vol 201-202 ◽  
pp. 95-98
Author(s):  
Yan Xie ◽  
Bo Chao Chen ◽  
Yao Jun Chen

The multi-level converter is one of the focuses in the current high-voltage high-power field of power conversion, and is found widely application in high power drive system. It generated so far for nearly three decades of history. During this period a large number of multi-level topology appeared, there are three most commonly used, which are diode clamped, capacitor and cascaded H-bridge. In this paper, the development of the multi-level converter is reviewed. The structure of three multi-level converter topologies are given, and then their advantages and disadvantages are given by analyzing and comparing their characteristics. Finally, a new modular multi-level converter (MMC) is introduced which is one of research focus of multi-level converter field at present. Its structure and working principle are described in detail. Multi-level converters will continue to be developed to meet the demand of high-voltage and high power applications.


2021 ◽  
Author(s):  
Victor R. F. B. de Souza ◽  
Luciano S. Barros ◽  
Flavio B. Costa

Nowadays, power converters play a fundamental role in the conditioning and processing of active and reactive power, and are directly related to power quality indexes. In this sense, new multi-level converter topologies have been integrated in order to provide higher power processing capacity with lower harmonic distortion, switch stress, heating, and losses. The use of these structures compared to conventional two-level converters is especially suitable for high power of the order of megawatt. Considering the relevance of this approach, this paper presents a comparative performance analysis among the conventional two-level topology (2L-VSC) and two multilevel topologies in a grid-connected system: neutral point clamped (NPC) and modular multilevel converter (MMC). Simulation test results present the impacts on voltages and currents for the switches and the whole system, as well as the evaluation of the total harmonic distortion (THD) in order to highlight the crucial points of each topology for this kind of application.


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