Enhanced Transient Stability Strategy for Grid-Forming Converter Based on Current Limiting
With the sustained increase in the penetration rate of grid-forming (GFM) converters in power systems, problems such as overcurrent and transient instability during system faults have drawn significant attention. This paper proposes an enhanced dynamic dq-axis current-limiting strategy (ED-CLiS) for...
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| Format: | Article |
| Language: | English |
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China electric power research institute
2025-01-01
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| Series: | CSEE Journal of Power and Energy Systems |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/11006437/ |
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| author | Zhenglong Sun Zhifeng He Naiyuan Liu Rui Zhang Bo Wang Guowei Cai |
| author_facet | Zhenglong Sun Zhifeng He Naiyuan Liu Rui Zhang Bo Wang Guowei Cai |
| author_sort | Zhenglong Sun |
| collection | DOAJ |
| description | With the sustained increase in the penetration rate of grid-forming (GFM) converters in power systems, problems such as overcurrent and transient instability during system faults have drawn significant attention. This paper proposes an enhanced dynamic dq-axis current-limiting strategy (ED-CLiS) for GFM converters, which improves transient stability across all stages before and after current limiting. First, a dynamic dq-axis current-limiting strategy (D-CLiS) is proposed. This strategy regulates the power angle to prevent it from going out of control during current limiting, which is achieved by controlling the <tex>$d$</tex>- and <tex>$q$</tex>-axis current reference values to reshape the <tex>${P}-\delta^{\prime}$</tex> curve. Additionally, a large reverse acceleration area can induce excessive angle <tex>$\delta^{\prime}$</tex> swings, causing the D-CLiS to be triggered repeatedly and resulting in converter instability after the control exit, even without faults. A reference power control structure (RPCS) is proposed, which suppresses the phenomenon by adjusting the power reference value to control the converter's reverse acceleration area. Finally, the control strategy is verified through simulations. |
| format | Article |
| id | doaj-art-e4c915a1a86242e0a9ef22e25f077d1f |
| institution | OA Journals |
| issn | 2096-0042 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | China electric power research institute |
| record_format | Article |
| series | CSEE Journal of Power and Energy Systems |
| spelling | doaj-art-e4c915a1a86242e0a9ef22e25f077d1f2025-08-20T02:33:55ZengChina electric power research instituteCSEE Journal of Power and Energy Systems2096-00422025-01-0111396097110.17775/CSEEJPES.2024.0862011006437Enhanced Transient Stability Strategy for Grid-Forming Converter Based on Current LimitingZhenglong Sun0Zhifeng He1Naiyuan Liu2Rui Zhang3Bo Wang4Guowei Cai5Ministry of Education (Northeast Electric Power University),Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology,Department of Electrical Engineering,Jilin,China,132011Ministry of Education (Northeast Electric Power University),Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology,Department of Electrical Engineering,Jilin,China,132011Ministry of Education (Northeast Electric Power University),Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology,Department of Electrical Engineering,Jilin,China,132011Ministry of Education (Northeast Electric Power University),Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology,Department of Electrical Engineering,Jilin,China,132011Ministry of Education (Northeast Electric Power University),Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology,Department of Electrical Engineering,Jilin,China,132011Ministry of Education (Northeast Electric Power University),Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology,Department of Electrical Engineering,Jilin,China,132011With the sustained increase in the penetration rate of grid-forming (GFM) converters in power systems, problems such as overcurrent and transient instability during system faults have drawn significant attention. This paper proposes an enhanced dynamic dq-axis current-limiting strategy (ED-CLiS) for GFM converters, which improves transient stability across all stages before and after current limiting. First, a dynamic dq-axis current-limiting strategy (D-CLiS) is proposed. This strategy regulates the power angle to prevent it from going out of control during current limiting, which is achieved by controlling the <tex>$d$</tex>- and <tex>$q$</tex>-axis current reference values to reshape the <tex>${P}-\delta^{\prime}$</tex> curve. Additionally, a large reverse acceleration area can induce excessive angle <tex>$\delta^{\prime}$</tex> swings, causing the D-CLiS to be triggered repeatedly and resulting in converter instability after the control exit, even without faults. A reference power control structure (RPCS) is proposed, which suppresses the phenomenon by adjusting the power reference value to control the converter's reverse acceleration area. Finally, the control strategy is verified through simulations.https://ieeexplore.ieee.org/document/11006437/Current-limiting controlgrid-forming (GFM) converterswitch controltransient stabilityvirtual synchronous generator (VSG) |
| spellingShingle | Zhenglong Sun Zhifeng He Naiyuan Liu Rui Zhang Bo Wang Guowei Cai Enhanced Transient Stability Strategy for Grid-Forming Converter Based on Current Limiting CSEE Journal of Power and Energy Systems Current-limiting control grid-forming (GFM) converter switch control transient stability virtual synchronous generator (VSG) |
| title | Enhanced Transient Stability Strategy for Grid-Forming Converter Based on Current Limiting |
| title_full | Enhanced Transient Stability Strategy for Grid-Forming Converter Based on Current Limiting |
| title_fullStr | Enhanced Transient Stability Strategy for Grid-Forming Converter Based on Current Limiting |
| title_full_unstemmed | Enhanced Transient Stability Strategy for Grid-Forming Converter Based on Current Limiting |
| title_short | Enhanced Transient Stability Strategy for Grid-Forming Converter Based on Current Limiting |
| title_sort | enhanced transient stability strategy for grid forming converter based on current limiting |
| topic | Current-limiting control grid-forming (GFM) converter switch control transient stability virtual synchronous generator (VSG) |
| url | https://ieeexplore.ieee.org/document/11006437/ |
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