Simplified equivalent aggregation framework for impedance network modeling of MMC-HVDC systems with grid structural considerations
Modular Multilevel Converter (MMC)-based Multi-terminal High-voltage Direct Current (MTDC) systems have gained widespread application in power transmission, where analyzing their wideband stability is critical for enhancing DC grid operational performance. This study focuses on addressing wideband s...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-09-01
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| Series: | International Journal of Electrical Power & Energy Systems |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0142061525004351 |
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| author | Yanxu Wang Guoqing Li Yechun Xin Tuo Wang Shouqi Jiang Weiru Wang Yupeng He |
| author_facet | Yanxu Wang Guoqing Li Yechun Xin Tuo Wang Shouqi Jiang Weiru Wang Yupeng He |
| author_sort | Yanxu Wang |
| collection | DOAJ |
| description | Modular Multilevel Converter (MMC)-based Multi-terminal High-voltage Direct Current (MTDC) systems have gained widespread application in power transmission, where analyzing their wideband stability is critical for enhancing DC grid operational performance. This study focuses on addressing wideband stability challenges in MTDC systems. Recognizing limitations in existing impedance modeling and network analysis approaches, the research first establishes a DC-side wideband impedance model for MMC stations by incorporating their multi-harmonic coupling characteristics. Subsequently, a generalized impedance network simplification methodology is proposed, applicable to two-terminal, three-terminal, and four-terminal MMC-HVDC system configurations — extensible to systems with higher terminal counts. Furthermore, this paper systematically analyzes the impact of system parameters (e.g., line lengths, control gains) on wideband stability and develops a coordinated suppression strategy balancing oscillation mitigation and dynamic performance enhancement. Finally, electromagnetic transient (EMT) simulations validate the methodology’s accuracy and effectiveness, providing a theoretical framework and technical guidelines for ensuring stable MTDC grid operation. |
| format | Article |
| id | doaj-art-1fa5daefb89a4edc8be13a0352ad0683 |
| institution | Kabale University |
| issn | 0142-0615 |
| language | English |
| publishDate | 2025-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | International Journal of Electrical Power & Energy Systems |
| spelling | doaj-art-1fa5daefb89a4edc8be13a0352ad06832025-08-20T04:02:32ZengElsevierInternational Journal of Electrical Power & Energy Systems0142-06152025-09-0117011088710.1016/j.ijepes.2025.110887Simplified equivalent aggregation framework for impedance network modeling of MMC-HVDC systems with grid structural considerationsYanxu Wang0Guoqing Li1Yechun Xin2Tuo Wang3Shouqi Jiang4Weiru Wang5Yupeng He6Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology Ministry of Education, Northeast Electric Power University, Jilin 132012, ChinaKey Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology Ministry of Education, Northeast Electric Power University, Jilin 132012, ChinaKey Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology Ministry of Education, Northeast Electric Power University, Jilin 132012, ChinaCorresponding author.; Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology Ministry of Education, Northeast Electric Power University, Jilin 132012, ChinaKey Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology Ministry of Education, Northeast Electric Power University, Jilin 132012, ChinaKey Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology Ministry of Education, Northeast Electric Power University, Jilin 132012, ChinaKey Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology Ministry of Education, Northeast Electric Power University, Jilin 132012, ChinaModular Multilevel Converter (MMC)-based Multi-terminal High-voltage Direct Current (MTDC) systems have gained widespread application in power transmission, where analyzing their wideband stability is critical for enhancing DC grid operational performance. This study focuses on addressing wideband stability challenges in MTDC systems. Recognizing limitations in existing impedance modeling and network analysis approaches, the research first establishes a DC-side wideband impedance model for MMC stations by incorporating their multi-harmonic coupling characteristics. Subsequently, a generalized impedance network simplification methodology is proposed, applicable to two-terminal, three-terminal, and four-terminal MMC-HVDC system configurations — extensible to systems with higher terminal counts. Furthermore, this paper systematically analyzes the impact of system parameters (e.g., line lengths, control gains) on wideband stability and develops a coordinated suppression strategy balancing oscillation mitigation and dynamic performance enhancement. Finally, electromagnetic transient (EMT) simulations validate the methodology’s accuracy and effectiveness, providing a theoretical framework and technical guidelines for ensuring stable MTDC grid operation.http://www.sciencedirect.com/science/article/pii/S0142061525004351Modular multilevel converterDC GridImpedance modelingStability analysis |
| spellingShingle | Yanxu Wang Guoqing Li Yechun Xin Tuo Wang Shouqi Jiang Weiru Wang Yupeng He Simplified equivalent aggregation framework for impedance network modeling of MMC-HVDC systems with grid structural considerations International Journal of Electrical Power & Energy Systems Modular multilevel converter DC Grid Impedance modeling Stability analysis |
| title | Simplified equivalent aggregation framework for impedance network modeling of MMC-HVDC systems with grid structural considerations |
| title_full | Simplified equivalent aggregation framework for impedance network modeling of MMC-HVDC systems with grid structural considerations |
| title_fullStr | Simplified equivalent aggregation framework for impedance network modeling of MMC-HVDC systems with grid structural considerations |
| title_full_unstemmed | Simplified equivalent aggregation framework for impedance network modeling of MMC-HVDC systems with grid structural considerations |
| title_short | Simplified equivalent aggregation framework for impedance network modeling of MMC-HVDC systems with grid structural considerations |
| title_sort | simplified equivalent aggregation framework for impedance network modeling of mmc hvdc systems with grid structural considerations |
| topic | Modular multilevel converter DC Grid Impedance modeling Stability analysis |
| url | http://www.sciencedirect.com/science/article/pii/S0142061525004351 |
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