Suppression control strategy of MMC sub-module capacitor voltage in variable-frequency situation
Modular multilevel converter (MMC) topology has received widespread attention in flexible DC transmission, power quality control, and other fields because of its high modularity and malleability characteristics, and has become one of the most promising topologies. However, owing to the characteristi...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2022-11-01
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| Series: | Energy Reports |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2352484721014931 |
| _version_ | 1797902113215348736 |
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| author | Zecheng Li Lei Bo Jin Bai Bo Yang Dongxu Zhu |
| author_facet | Zecheng Li Lei Bo Jin Bai Bo Yang Dongxu Zhu |
| author_sort | Zecheng Li |
| collection | DOAJ |
| description | Modular multilevel converter (MMC) topology has received widespread attention in flexible DC transmission, power quality control, and other fields because of its high modularity and malleability characteristics, and has become one of the most promising topologies. However, owing to the characteristics of the MMC itself, the fluctuation of the capacitor voltage of the MMC sub-module is inversely proportional to the MMC working frequency. One of the main technical challenges for MMC is effectively suppressing the fluctuation of the capacitor voltage of the MMC sub-module when working at low frequencies. This study first analyzes the reasons for the fluctuation of the MMC sub-module capacitor voltage at low frequency. Then, based on the results of this analysis, we propose a suppression control strategy for the capacitor voltage fluctuation of the MMC sub-module in variable-frequency working situations. Finally, an MMC module was built using the MATLAB/Simulink environment for simulation verification, and a five-level MMC physical experimental platform was built for experimental verification. The simulation and experimental results demonstrate that the proposed suppression control strategy for the MMC sub-module capacitor voltage effectively suppresses the fluctuation of the capacitor voltage under variable-frequency working situations. |
| first_indexed | 2024-04-10T09:12:40Z |
| format | Article |
| id | doaj.art-ee0e6912180a433790bac12aa39cf17c |
| institution | Directory Open Access Journal |
| issn | 2352-4847 |
| language | English |
| last_indexed | 2024-04-10T09:12:40Z |
| publishDate | 2022-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Energy Reports |
| spelling | doaj.art-ee0e6912180a433790bac12aa39cf17c2023-02-21T05:09:58ZengElsevierEnergy Reports2352-48472022-11-01811911206Suppression control strategy of MMC sub-module capacitor voltage in variable-frequency situationZecheng Li0Lei Bo1Jin Bai2Bo Yang3Dongxu Zhu4State Grid Ningxia Electric Power Research Institute, 750002, Ningxia, ChinaSchool of Mechanical Electronic and Information Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China; Corresponding author.State Grid Ningxia Electric Power Research Institute, 750002, Ningxia, ChinaSchool of Mechanical Electronic and Information Engineering, China University of Mining and Technology (Beijing), Beijing 100083, ChinaSchool of Mechanical Electronic and Information Engineering, China University of Mining and Technology (Beijing), Beijing 100083, ChinaModular multilevel converter (MMC) topology has received widespread attention in flexible DC transmission, power quality control, and other fields because of its high modularity and malleability characteristics, and has become one of the most promising topologies. However, owing to the characteristics of the MMC itself, the fluctuation of the capacitor voltage of the MMC sub-module is inversely proportional to the MMC working frequency. One of the main technical challenges for MMC is effectively suppressing the fluctuation of the capacitor voltage of the MMC sub-module when working at low frequencies. This study first analyzes the reasons for the fluctuation of the MMC sub-module capacitor voltage at low frequency. Then, based on the results of this analysis, we propose a suppression control strategy for the capacitor voltage fluctuation of the MMC sub-module in variable-frequency working situations. Finally, an MMC module was built using the MATLAB/Simulink environment for simulation verification, and a five-level MMC physical experimental platform was built for experimental verification. The simulation and experimental results demonstrate that the proposed suppression control strategy for the MMC sub-module capacitor voltage effectively suppresses the fluctuation of the capacitor voltage under variable-frequency working situations.http://www.sciencedirect.com/science/article/pii/S2352484721014931MMCLow-frequency working situationVariable-frequency working situationSuppression control strategy |
| spellingShingle | Zecheng Li Lei Bo Jin Bai Bo Yang Dongxu Zhu Suppression control strategy of MMC sub-module capacitor voltage in variable-frequency situation Energy Reports MMC Low-frequency working situation Variable-frequency working situation Suppression control strategy |
| title | Suppression control strategy of MMC sub-module capacitor voltage in variable-frequency situation |
| title_full | Suppression control strategy of MMC sub-module capacitor voltage in variable-frequency situation |
| title_fullStr | Suppression control strategy of MMC sub-module capacitor voltage in variable-frequency situation |
| title_full_unstemmed | Suppression control strategy of MMC sub-module capacitor voltage in variable-frequency situation |
| title_short | Suppression control strategy of MMC sub-module capacitor voltage in variable-frequency situation |
| title_sort | suppression control strategy of mmc sub module capacitor voltage in variable frequency situation |
| topic | MMC Low-frequency working situation Variable-frequency working situation Suppression control strategy |
| url | http://www.sciencedirect.com/science/article/pii/S2352484721014931 |
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