A distributed control method for power module voltage balancing of modular multilevel converters

2016 ◽  
Author(s):  
Yongjie Luo ◽  
Zixin Li ◽  
Yaohua Li ◽  
Ping Wang
Keyword(s):  
Distributed Control ◽  
Control Method ◽  
Power Module ◽  
Multilevel Converters ◽  
Voltage Balancing ◽  
Modular Multilevel Converters

scholarly journals Lifetime and reliability improvements in modular multilevel converters using controlled circulating current

2021 ◽  
Author(s):  
Nasiru B. Kadandani ◽  
Mohamed Dahidah ◽  
Salaheddine Ethni ◽  
Musbahu Muhammad
Keyword(s):  
Control Method ◽  
Semiconductor Devices ◽  
Junction Temperature ◽  
Multilevel Converters ◽  
Control Approach ◽  
Circulating Current ◽  
Inherent Feature ◽  
Modular Multilevel Converters ◽  
Current Loading ◽  
Laboratory Prototype

AbstractCirculating current has been an inherent feature of modular multilevel converters (MMC), which results in second-order harmonics on the arms currents. If not properly controlled, the circulating current can affect the lifetime and reliability of a converter by increasing the current loading, loss distribution, and junction temperature of its semiconductor devices. This paper proposes controlled circulating current injection as a means of improving the lifetime and reliability of an MMC. The proposed method involves modifying the reference modulating signals of the converter arms to include the controlled differential voltage as an offset. The junction temperature of the semiconductor devices obtained from an electro-thermal simulation is processed to deduce the lifetime and reliability of the converter. The obtained results are benchmarked against a case where the control method is not incorporated. The incorporation of the proposed control method results in a 68.25% increase in the expected lifetime of the converter and a 3.06% increase on its reliability index. Experimental results of a scaled down laboratory prototype validate the effectiveness of the proposed control approach.

A simple control method for modular multilevel converters

2017 ◽  
Author(s):  
Mohammad Sleiman ◽  
Bachir Kedjar ◽  
Handy Fortin Blanchette ◽  
Hadi Kanaan ◽  
Kamal Al-Haddad
Keyword(s):  
Control Method ◽  
Multilevel Converters ◽  
Modular Multilevel Converters

Variable Rounding Level Control Method for Modular Multilevel Converters

2021 ◽  
Vol 36 (4) ◽  
pp. 4791-4801
Author(s):  
Jiapeng Yin ◽  
Jose I. Leon ◽  
Marcelo A. Perez ◽  
Leopoldo G. Franquelo ◽  
Abraham Marquez ◽  
...  
Keyword(s):  
Control Method ◽  
Level Control ◽  
Multilevel Converters ◽  
Modular Multilevel Converters

A Currentless Submodule Individual Voltage Balancing Control for Modular Multilevel Converters

2020 ◽  
Vol 67 (11) ◽  
pp. 9370-9382
Author(s):  
Fujin Deng ◽  
Chengkai Liu ◽  
Qingsong Wang ◽  
Rongwu Zhu ◽  
Xu Cai ◽  
...  
Keyword(s):  
Multilevel Converters ◽  
Voltage Balancing ◽  
Modular Multilevel Converters ◽  
Balancing Control
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