Mid- and High-Frequency Oscillation Suppression Strategy for MMC-HVDC System Based on DC Current Feedback
The serious mid-and high- frequency oscillation issue in modular multilevel convertor based high voltage direct current (MMC-HVDC) systems poses a significant threat to the normal operation of power systems. In this paper, we firstly established an AC-side impedance model of the MMC based on its dyn...
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| Format: | Article |
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State Grid Energy Research Institute
2025-01-01
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| Series: | Zhongguo dianli |
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| Online Access: | https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.202309116 |
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| author | Yechun XIN Shangxuan LI Yanxu WANG Yihua ZHU Jiawei YU Dongxu CHANG |
| author_facet | Yechun XIN Shangxuan LI Yanxu WANG Yihua ZHU Jiawei YU Dongxu CHANG |
| author_sort | Yechun XIN |
| collection | DOAJ |
| description | The serious mid-and high- frequency oscillation issue in modular multilevel convertor based high voltage direct current (MMC-HVDC) systems poses a significant threat to the normal operation of power systems. In this paper, we firstly established an AC-side impedance model of the MMC based on its dynamic phase vector model. Secondly, we analyzed the impact of control loops and control parameters on MMC impedance characteristics using the impedance method, and identified the power outer loop, current inner loop and control loop delay as the main factors causing MMC to present negative damping characteristics. And then, based on an analysis of the limitations of existing oscillation suppression strategies that are based on voltage feedforward loops and current inner loops, we proposed an oscillation suppression strategy that adds DC current feedback to the power outer loop, which can greatly eliminate harmonic components in the system and improve MMC impedance characteristics. Finally, the correctness and effectiveness of the theoretical analysis and proposed suppression measures were verified through electromagnetic simulation software. |
| format | Article |
| id | doaj-art-2a91d2fc11164a368603e2e8a652ffd0 |
| institution | OA Journals |
| issn | 1004-9649 |
| language | zho |
| publishDate | 2025-01-01 |
| publisher | State Grid Energy Research Institute |
| record_format | Article |
| series | Zhongguo dianli |
| spelling | doaj-art-2a91d2fc11164a368603e2e8a652ffd02025-08-20T01:58:27ZzhoState Grid Energy Research InstituteZhongguo dianli1004-96492025-01-01581394910.11930/j.issn.1004-9649.202309116zgdl-57-07-xinyechunMid- and High-Frequency Oscillation Suppression Strategy for MMC-HVDC System Based on DC Current FeedbackYechun XIN0Shangxuan LI1Yanxu WANG2Yihua ZHU3Jiawei YU4Dongxu CHANG5Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology, Ministry of Education (Northeast Electric Power University), Jinlin 132012, ChinaKey Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology, Ministry of Education (Northeast Electric Power University), Jinlin 132012, ChinaKey Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology, Ministry of Education (Northeast Electric Power University), Jinlin 132012, ChinaState Key Laboratory of HVDC, China Southern Power Grid Electric Power Research Institute Co., Ltd., Guangzhou 510663, ChinaState Key Laboratory of HVDC, China Southern Power Grid Electric Power Research Institute Co., Ltd., Guangzhou 510663, ChinaState Key Laboratory of HVDC, China Southern Power Grid Electric Power Research Institute Co., Ltd., Guangzhou 510663, ChinaThe serious mid-and high- frequency oscillation issue in modular multilevel convertor based high voltage direct current (MMC-HVDC) systems poses a significant threat to the normal operation of power systems. In this paper, we firstly established an AC-side impedance model of the MMC based on its dynamic phase vector model. Secondly, we analyzed the impact of control loops and control parameters on MMC impedance characteristics using the impedance method, and identified the power outer loop, current inner loop and control loop delay as the main factors causing MMC to present negative damping characteristics. And then, based on an analysis of the limitations of existing oscillation suppression strategies that are based on voltage feedforward loops and current inner loops, we proposed an oscillation suppression strategy that adds DC current feedback to the power outer loop, which can greatly eliminate harmonic components in the system and improve MMC impedance characteristics. Finally, the correctness and effectiveness of the theoretical analysis and proposed suppression measures were verified through electromagnetic simulation software.https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.202309116modular multilevel convertor (mmc)stability analysismid- and high-frequency oscillationoscillation suppression |
| spellingShingle | Yechun XIN Shangxuan LI Yanxu WANG Yihua ZHU Jiawei YU Dongxu CHANG Mid- and High-Frequency Oscillation Suppression Strategy for MMC-HVDC System Based on DC Current Feedback Zhongguo dianli modular multilevel convertor (mmc) stability analysis mid- and high-frequency oscillation oscillation suppression |
| title | Mid- and High-Frequency Oscillation Suppression Strategy for MMC-HVDC System Based on DC Current Feedback |
| title_full | Mid- and High-Frequency Oscillation Suppression Strategy for MMC-HVDC System Based on DC Current Feedback |
| title_fullStr | Mid- and High-Frequency Oscillation Suppression Strategy for MMC-HVDC System Based on DC Current Feedback |
| title_full_unstemmed | Mid- and High-Frequency Oscillation Suppression Strategy for MMC-HVDC System Based on DC Current Feedback |
| title_short | Mid- and High-Frequency Oscillation Suppression Strategy for MMC-HVDC System Based on DC Current Feedback |
| title_sort | mid and high frequency oscillation suppression strategy for mmc hvdc system based on dc current feedback |
| topic | modular multilevel convertor (mmc) stability analysis mid- and high-frequency oscillation oscillation suppression |
| url | https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.202309116 |
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