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Virtual Impedance Control Strategy for Improving the Adaptability of Converter to Weak Grid
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Shude YANG1, Wang LI1, Xinwen ZHANG2, Changhong CAI3, Xiongying GAO3, Xin ZHOU3
Journal of Power Supply | 2024, 22(2) : 158 - 166
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Journal of Power Supply | 2024, 22(2): 158-166
• Renewable Energy System •
Virtual Impedance Control Strategy for Improving the Adaptability of Converter to Weak Grid
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Shude YANG1, Wang LI1, Xinwen ZHANG2, Changhong CAI3, Xiongying GAO3, Xin ZHOU3
Affiliations
  • 1 College of Electrical, Energy and Power Engineering Yangzhou University Yangzhou 225127 China
  • 2 School of Electrical and Information Engineering North Minzu University Yinchuan 750021 China
  • 3 Yangzhou Hua Ding Electric Appliance Co., Ltd. Yangzhou 225127 China
Published: 2024-03-30 doi: 10.13234/j.issn.2095-2805.2024.2.158
Outline
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The large grid inductance in weak grid may cause a grid-connected converter to be unstable. Therefore, an impedance model of grid-connected converter is built at first, and the influence of grid inductance on the stability of grid-connected converter is analyzed according to the impedance ratio criterion. Then, aimed at the problem of low adaptability of the grid-connected converter to inductive grid impedance, a virtual impedance control strategy based on band-pass filter is proposed, and the influence of virtual resistance value on the adaptability of grid-connected converter to weak grid is studied. Furthermore, a selection principle for the virtual resistance value is also given. Finally, a system simulation model is built, and simulation results verify the correctness of theoretical analysis and the effectiveness of the proposed control strategy.

Weak grid  /  grid-connected converter  /  virtual impedance  /  band-pass filter  /  stability
Shude YANG, Wang LI, Xinwen ZHANG, Changhong CAI, Xiongying GAO, Xin ZHOU. Virtual Impedance Control Strategy for Improving the Adaptability of Converter to Weak Grid[J]. Journal of Power Supply, 2024 , 22 (2) : 158 -166 . DOI: 10.13234/j.issn.2095-2805.2024.2.158
Funding
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  • Natural Science Foundation of the Jiangsu Higher Education Institutions(19KJB470038)
  • Ningxia Natural Science Foundation(2020AAC03210)
  • National Natural Science Foundation of China(51867001)
Appendix
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Year 2024 volume 22 Issue 2
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347
143
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Article Info
doi: 10.13234/j.issn.2095-2805.2024.2.158
  • Receive Date：2021-08-02
  • Online Date：2025-07-21
  • Published：2024-03-30
Article Data
Affiliations
History
  • Received：2021-08-02
  • Revised：2021-08-26
  • Accepted：2021-09-03
Funding
Natural Science Foundation of the Jiangsu Higher Education Institutions(19KJB470038)
Ningxia Natural Science Foundation(2020AAC03210)
National Natural Science Foundation of China(51867001)
Affiliations
    1 College of Electrical, Energy and Power Engineering Yangzhou University Yangzhou 225127 China
    2 School of Electrical and Information Engineering North Minzu University Yinchuan 750021 China
    3 Yangzhou Hua Ding Electric Appliance Co., Ltd. Yangzhou 225127 China
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https://castjournals.cast.org.cn/joweb/dyxb/EN/10.13234/j.issn.2095-2805.2024.2.158
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红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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