A cooperative control strategy for power quality based on parallel grid-connected converters
Power quality control based on grid-connected converter can effectively utilize the surplus capacity of the converter and improves the benefits. However, existing methods tend to only consider grid-following (GFL) control and fail to fully utilize the control potential of multiple converters. In thi...
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| Format: | Article |
| Language: | zho |
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Editorial Department of Electric Power Engineering Technology
2025-01-01
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| Series: | 电力工程技术 |
| Subjects: | |
| Online Access: | https://www.epet-info.com/dlgcjsen/article/abstract/240920951 |
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| author | LIANG Xiaorui LUO Yuhang ZHANG Huaying TU Chunming LIU Huicong ZHENG Yuting |
| author_facet | LIANG Xiaorui LUO Yuhang ZHANG Huaying TU Chunming LIU Huicong ZHENG Yuting |
| author_sort | LIANG Xiaorui |
| collection | DOAJ |
| description | Power quality control based on grid-connected converter can effectively utilize the surplus capacity of the converter and improves the benefits. However, existing methods tend to only consider grid-following (GFL) control and fail to fully utilize the control potential of multiple converters. In this paper, a cooperative control strategy for harmonic compensation and voltage drop suppression is proposed based on a parallel system of GFL and grid-forming (GFM) converters. Firstly, the basic control principle and mathematical model of grid-connected converter are introduced. Secondly, to compensate the harmonics at the point of common coupling (PCC), a harmonic sub-compensation method is proposed. This approach can improve the flexibility of harmonic compensation and reasonably apportion harmonic between grid-connected converter of different capacities. To support the PCC voltage, the parallel system can operate in three conditions: normal operation condition, condition of GFL support voltage independently and co-supported operating condition. Through compensation capacity calculation and reactive power allocation, the voltage at the PCC can maintain near the rated voltage. Finally, the feasibility and superiority of the proposed strategy are verified through simulations. |
| format | Article |
| id | doaj-art-6d0e0152eed44ddab88f1cbb71f06ece |
| institution | Kabale University |
| issn | 2096-3203 |
| language | zho |
| publishDate | 2025-01-01 |
| publisher | Editorial Department of Electric Power Engineering Technology |
| record_format | Article |
| series | 电力工程技术 |
| spelling | doaj-art-6d0e0152eed44ddab88f1cbb71f06ece2025-02-08T08:40:18ZzhoEditorial Department of Electric Power Engineering Technology电力工程技术2096-32032025-01-01441799110.12158/j.2096-3203.2025.01.009240920951A cooperative control strategy for power quality based on parallel grid-connected convertersLIANG Xiaorui0LUO Yuhang1ZHANG Huaying2TU Chunming3LIU Huicong4ZHENG Yuting5New Smart City High Quality Power Supply Joint Laboratory of CSG, Shenzhen Power Supply Bureau Co., Ltd., Shenzhen 518020, ChinaCollege of Electrical and Information Engineering, Hunan University, Changsha 410082, ChinaNew Smart City High Quality Power Supply Joint Laboratory of CSG, Shenzhen Power Supply Bureau Co., Ltd., Shenzhen 518020, ChinaCollege of Electrical and Information Engineering, Hunan University, Changsha 410082, ChinaNew Smart City High Quality Power Supply Joint Laboratory of CSG, Shenzhen Power Supply Bureau Co., Ltd., Shenzhen 518020, ChinaCollege of Electrical and Information Engineering, Hunan University, Changsha 410082, ChinaPower quality control based on grid-connected converter can effectively utilize the surplus capacity of the converter and improves the benefits. However, existing methods tend to only consider grid-following (GFL) control and fail to fully utilize the control potential of multiple converters. In this paper, a cooperative control strategy for harmonic compensation and voltage drop suppression is proposed based on a parallel system of GFL and grid-forming (GFM) converters. Firstly, the basic control principle and mathematical model of grid-connected converter are introduced. Secondly, to compensate the harmonics at the point of common coupling (PCC), a harmonic sub-compensation method is proposed. This approach can improve the flexibility of harmonic compensation and reasonably apportion harmonic between grid-connected converter of different capacities. To support the PCC voltage, the parallel system can operate in three conditions: normal operation condition, condition of GFL support voltage independently and co-supported operating condition. Through compensation capacity calculation and reactive power allocation, the voltage at the PCC can maintain near the rated voltage. Finally, the feasibility and superiority of the proposed strategy are verified through simulations.https://www.epet-info.com/dlgcjsen/article/abstract/240920951grid-connected convertergrid-following (gfl)grid-forming (gfm)quasi-resonant controlharmonic controlvoltage supportpower quality |
| spellingShingle | LIANG Xiaorui LUO Yuhang ZHANG Huaying TU Chunming LIU Huicong ZHENG Yuting A cooperative control strategy for power quality based on parallel grid-connected converters 电力工程技术 grid-connected converter grid-following (gfl) grid-forming (gfm) quasi-resonant control harmonic control voltage support power quality |
| title | A cooperative control strategy for power quality based on parallel grid-connected converters |
| title_full | A cooperative control strategy for power quality based on parallel grid-connected converters |
| title_fullStr | A cooperative control strategy for power quality based on parallel grid-connected converters |
| title_full_unstemmed | A cooperative control strategy for power quality based on parallel grid-connected converters |
| title_short | A cooperative control strategy for power quality based on parallel grid-connected converters |
| title_sort | cooperative control strategy for power quality based on parallel grid connected converters |
| topic | grid-connected converter grid-following (gfl) grid-forming (gfm) quasi-resonant control harmonic control voltage support power quality |
| url | https://www.epet-info.com/dlgcjsen/article/abstract/240920951 |
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