An Optimized Capacitor Voltage Balancing Method for Modular Multilevel Converter

Ding, Jincheng; Wang, Zhenshu; Chen, Wu; Du, Zixuan

doi:10.1088/1757-899x/394/4/042082

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2022

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“…should be equal to 𝑉 𝑑 𝑛 ⁄ . The sub-modules are controlled in such a way, that in one arm the n sub-modules are in an active state at any instant [1]- [5]. Thus, the voltage of the semi-phase changes from 0 to 𝑉 𝑑 .…”

Section: Operating Principlementioning

confidence: 99%

Performance analysis of capacitor voltage balancing in modular multilevel converter by sorting algorithm

Al-Khayyat

Ridha

Fadel

2022

IJPEDS

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<span lang="EN-US">Due to the modularity of modular multilevel converter (MMC), therefore it has been considered as a substitute for the diode-clamp multilevel inverter in applications of high-voltage high-power. Where it can obtain any level of voltage without imposing complexity on the control system. This study analyses in detail the operation principle and balances the capacitor voltage of sub-module (SM) in modular multilevel converter by sorting algorithm. The output voltage control and capacitor voltage balancing technique are confirmed by MATLAB/Simulink and the obtained result has been discussed, where the capacitor voltage of the sub-module has controlled within the acceptable deviation limit, which is 5-10%. In addition, the circulating current has been controlled and reduced.</span>

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Section: Operating Principlementioning

confidence: 99%