Additional-levels-based control method for modular multilevel converters with reduced DC-link current ripple

The high and low order dc-link current ripple can be caused under balanced and unbalanced ac grid/load conditions for three-phase modular multilevel converters (MMCs). To enhance the dc-link current quality, this paper proposes an additional-levels-based control (ALC) method, where the conventional...

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Main Authors: Yu, Qiang, Deng, Fujin, Tang, Yi, Wang, Yanbo, Blaabjerg, Frede
Other Authors: School of Electrical and Electronic Engineering
Format: Article
Language:English
Published: 2023
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Online Access:https://hdl.handle.net/10356/172151
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1721512023-12-01T15:40:39Z Additional-levels-based control method for modular multilevel converters with reduced DC-link current ripple Yu, Qiang Deng, Fujin Tang, Yi Wang, Yanbo Blaabjerg, Frede School of Electrical and Electronic Engineering Engineering::Electrical and electronic engineering Circulating Current DC-Link Current Ripple The high and low order dc-link current ripple can be caused under balanced and unbalanced ac grid/load conditions for three-phase modular multilevel converters (MMCs). To enhance the dc-link current quality, this paper proposes an additional-levels-based control (ALC) method, where the conventional modulation is employed to generate ac-side voltage levels and a model predictive control (MPC) algorithm with reduced calculation burden is developed to produce additional levels for dc-link current performance improvement. Through evaluating the cost function of MPC, the proposed method can reduce both high and low order dc-link current ripple for the MMC. Meanwhile, it avoids disturbing the quality of the ac-side voltage. Besides, the calculation burden of the proposed method is independent of the submodules’ number per arm. The validity and effectiveness of the proposed method have been verified by simulation and experimental results. Published version 2023-11-27T04:21:32Z 2023-11-27T04:21:32Z 2023 Journal Article Yu, Q., Deng, F., Tang, Y., Wang, Y. & Blaabjerg, F. (2023). Additional-levels-based control method for modular multilevel converters with reduced DC-link current ripple. International Journal of Electrical Power and Energy Systems, 153, 109288-. https://dx.doi.org/10.1016/j.ijepes.2023.109288 0142-0615 https://hdl.handle.net/10356/172151 10.1016/j.ijepes.2023.109288 2-s2.0-85161908167 153 109288 en International Journal of Electrical Power and Energy Systems © 2023 Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Electrical and electronic engineering
Circulating Current
DC-Link Current Ripple
spellingShingle Engineering::Electrical and electronic engineering
Circulating Current
DC-Link Current Ripple
Yu, Qiang
Deng, Fujin
Tang, Yi
Wang, Yanbo
Blaabjerg, Frede
Additional-levels-based control method for modular multilevel converters with reduced DC-link current ripple
description The high and low order dc-link current ripple can be caused under balanced and unbalanced ac grid/load conditions for three-phase modular multilevel converters (MMCs). To enhance the dc-link current quality, this paper proposes an additional-levels-based control (ALC) method, where the conventional modulation is employed to generate ac-side voltage levels and a model predictive control (MPC) algorithm with reduced calculation burden is developed to produce additional levels for dc-link current performance improvement. Through evaluating the cost function of MPC, the proposed method can reduce both high and low order dc-link current ripple for the MMC. Meanwhile, it avoids disturbing the quality of the ac-side voltage. Besides, the calculation burden of the proposed method is independent of the submodules’ number per arm. The validity and effectiveness of the proposed method have been verified by simulation and experimental results.
author2 School of Electrical and Electronic Engineering
author_facet School of Electrical and Electronic Engineering
Yu, Qiang
Deng, Fujin
Tang, Yi
Wang, Yanbo
Blaabjerg, Frede
format Article
author Yu, Qiang
Deng, Fujin
Tang, Yi
Wang, Yanbo
Blaabjerg, Frede
author_sort Yu, Qiang
title Additional-levels-based control method for modular multilevel converters with reduced DC-link current ripple
title_short Additional-levels-based control method for modular multilevel converters with reduced DC-link current ripple
title_full Additional-levels-based control method for modular multilevel converters with reduced DC-link current ripple
title_fullStr Additional-levels-based control method for modular multilevel converters with reduced DC-link current ripple
title_full_unstemmed Additional-levels-based control method for modular multilevel converters with reduced DC-link current ripple
title_sort additional-levels-based control method for modular multilevel converters with reduced dc-link current ripple
publishDate 2023
url https://hdl.handle.net/10356/172151
_version_ 1784855604225900544