Accurate Modulation Voltage Tracking With Reduced Switching Frequency for Modular Multilevel Converters in Offshore Wind Power Systems
In recent years, modular multilevel converter (MMC) technology has become a cornerstone of offshore wind power development. To optimize MMC system performance, this paper proposes an enhanced control scheme, where the number of inserted submodules (SMs) per phase is dynamically adjusted according to...
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| Format: | Article |
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IEEE
2025-01-01
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| Series: | IEEE Access |
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| Online Access: | https://ieeexplore.ieee.org/document/11091292/ |
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| author | Rui Li Zhaogang Li Ran Guo Zhiwen Suo Yi Liang |
| author_facet | Rui Li Zhaogang Li Ran Guo Zhiwen Suo Yi Liang |
| author_sort | Rui Li |
| collection | DOAJ |
| description | In recent years, modular multilevel converter (MMC) technology has become a cornerstone of offshore wind power development. To optimize MMC system performance, this paper proposes an enhanced control scheme, where the number of inserted submodules (SMs) per phase is dynamically adjusted according to real-time capacitor voltage fluctuations to enable precise tracking of the modulation voltage reference. Circulating currents are intrinsically suppressed, reducing arm inductance by 95.6%. In addition, the proposed scheme optimizes SM sequencing by leveraging historical SM switching states, achieving 42.6% switching frequency reduction. Furthermore, an arm energy balancing control is implemented to ensure precise energy equilibrium across the MMC arms. The effectiveness of the proposed strategy is validated through PSCAD/EMTDC simulations of an offshore wind farm integrated via a point-to-point high voltage DC (HVDC) link. |
| format | Article |
| id | doaj-art-96f68ab4abf6411ea72a32aabcb3c418 |
| institution | DOAJ |
| issn | 2169-3536 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj-art-96f68ab4abf6411ea72a32aabcb3c4182025-08-20T03:22:19ZengIEEEIEEE Access2169-35362025-01-011313473513474710.1109/ACCESS.2025.359195811091292Accurate Modulation Voltage Tracking With Reduced Switching Frequency for Modular Multilevel Converters in Offshore Wind Power SystemsRui Li0https://orcid.org/0000-0002-7122-4509Zhaogang Li1https://orcid.org/0009-0005-2844-5057Ran Guo2Zhiwen Suo3Yi Liang4https://orcid.org/0009-0008-7661-8102School of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin, ChinaSchool of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin, ChinaSchool of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin, ChinaState Grid Economic and Technological Research Institute Company Ltd., Beijing, ChinaSchool of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin, ChinaIn recent years, modular multilevel converter (MMC) technology has become a cornerstone of offshore wind power development. To optimize MMC system performance, this paper proposes an enhanced control scheme, where the number of inserted submodules (SMs) per phase is dynamically adjusted according to real-time capacitor voltage fluctuations to enable precise tracking of the modulation voltage reference. Circulating currents are intrinsically suppressed, reducing arm inductance by 95.6%. In addition, the proposed scheme optimizes SM sequencing by leveraging historical SM switching states, achieving 42.6% switching frequency reduction. Furthermore, an arm energy balancing control is implemented to ensure precise energy equilibrium across the MMC arms. The effectiveness of the proposed strategy is validated through PSCAD/EMTDC simulations of an offshore wind farm integrated via a point-to-point high voltage DC (HVDC) link.https://ieeexplore.ieee.org/document/11091292/Modular multilevel converternearest level modulationoffshore wind powersubmodule capacitor voltage balancing |
| spellingShingle | Rui Li Zhaogang Li Ran Guo Zhiwen Suo Yi Liang Accurate Modulation Voltage Tracking With Reduced Switching Frequency for Modular Multilevel Converters in Offshore Wind Power Systems IEEE Access Modular multilevel converter nearest level modulation offshore wind power submodule capacitor voltage balancing |
| title | Accurate Modulation Voltage Tracking With Reduced Switching Frequency for Modular Multilevel Converters in Offshore Wind Power Systems |
| title_full | Accurate Modulation Voltage Tracking With Reduced Switching Frequency for Modular Multilevel Converters in Offshore Wind Power Systems |
| title_fullStr | Accurate Modulation Voltage Tracking With Reduced Switching Frequency for Modular Multilevel Converters in Offshore Wind Power Systems |
| title_full_unstemmed | Accurate Modulation Voltage Tracking With Reduced Switching Frequency for Modular Multilevel Converters in Offshore Wind Power Systems |
| title_short | Accurate Modulation Voltage Tracking With Reduced Switching Frequency for Modular Multilevel Converters in Offshore Wind Power Systems |
| title_sort | accurate modulation voltage tracking with reduced switching frequency for modular multilevel converters in offshore wind power systems |
| topic | Modular multilevel converter nearest level modulation offshore wind power submodule capacitor voltage balancing |
| url | https://ieeexplore.ieee.org/document/11091292/ |
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