Improved Sampled Average Modulation Technique for the Modular Multilevel Converters

Juan Carlos Colque, Ernesto Ruppert Filho and José Luis Azcue
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Juan Carlos Colque: Department of Systems and Energy, Faculty of Electrical and Computer Engineering, State University of Campinas, São Paulo 13083-852, Brazil
Ernesto Ruppert Filho: Department of Systems and Energy, Faculty of Electrical and Computer Engineering, State University of Campinas, São Paulo 13083-852, Brazil
José Luis Azcue: Center for Engineering, Modeling and Applied Social Sciences, Federal University of ABC, São Paulo 09210-580, Brazil

Energies, 2022, vol. 15, issue 13, 1-20

Abstract: In this article the improved sampled average modulation technique is proposed, this technique has 2 N + 1 levels in the output voltage waveform of MMC and it is considered as of low complexity of implementation for any number of submodules per arm. For that, characteristics such as dynamic response, implementation complexity, inverter output voltage waveform levels, and switching frequency are considered to evaluate and validate the proposed modulation technique. The proposed technique is compared with other three previously proposed techniques, its considering parameters such as the THD and the fundamental value of the output voltage, and also the peak-to-peak variation of the submodule capacitor voltage. Several simulations were performed in the Matlab/Simulink software and with these results, it was validated the proposed modulation technique, and also it is verified that the proposed technique is computationally more efficient. This last one shows its potential for multiphase multilevel applications.

Keywords: modular multilevel converter; sampled average; modulation techniques; 2 N + 1 voltage levels (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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