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Study on Integrated Control of Frequency Transient Stability of Multi-microinverter Microgrid
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Qingjun LI1, Jianhao TAI2, Yue FAN1, Zhangshun CUI3
Journal of Power Supply | 2024, 22(1) : 57 - 65
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Journal of Power Supply | 2024, 22(1): 57-65
• AC-DC Converters •
Study on Integrated Control of Frequency Transient Stability of Multi-microinverter Microgrid
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Qingjun LI1, Jianhao TAI2, Yue FAN1, Zhangshun CUI3
Affiliations
  • 1 Construction Department State Grid Qinghai Electric Power Company Xining 810008 China
  • 2 College of Resources and Environment Henan University of Economics and Law Zhengzhou 450000 China
  • 3 Northwest Branch Beijing Lostar Science and Technology Development Co., Ltd Beijing 100120 China
Published: 2024-01-30 doi: 10.13234/j.issn.2095-2805.2024.1.57
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The integrated control of frequency transient stability of multi-microinverter microgrid is studied, which can effectively control the frequency transient stability of microgrid, improve the control accuracy, and shorten the regulation time. By means of excitation control and power frequency control, a virtual synchronous generator(VSG) control method is constructed to realize the frequency transient stability control of microgrid under a small load disturbance. The improved droop control method is used to realize the frequency transient stability control of microgrid under a large load disturbance. By designing a synchronous voltage controller and a double-loop controller, the free switch between the VSG control method and the improved droop control method is completed, and the transient stability of microgrid frequency under different conditions is controlled comprehensively. Experimental results show that the proposed method can effectively control the frequency transient stability of microgrid under different load disturbances. When switching between the off-grid and grid-connected modes, the control methods are effectively switched, the frequency transient stability of microgrid is accurately controlled, and the regulation time is shortened.

Multi-microinverter  /  microgrid  /  frequency  /  transient stability  /  integrated control  /  virtual synchronous generator (VSG)  /  improved droop control
Qingjun LI, Jianhao TAI, Yue FAN, Zhangshun CUI. Study on Integrated Control of Frequency Transient Stability of Multi-microinverter Microgrid[J]. Journal of Power Supply, 2024 , 22 (1) : 57 -65 . DOI: 10.13234/j.issn.2095-2805.2024.1.57
Funding
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  • The Key R & D and Promotion Special Project of Henan Province(192102210138)
Appendix
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Year 2024 volume 22 Issue 1
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Article Info
doi: 10.13234/j.issn.2095-2805.2024.1.57
  • Receive Date：2020-10-21
  • Online Date：2025-07-21
  • Published：2024-01-30
Article Data
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History
  • Received：2020-10-21
  • Revised：2021-02-26
  • Accepted：2021-03-04
Funding
The Key R & D and Promotion Special Project of Henan Province(192102210138)
Affiliations
    1 Construction Department State Grid Qinghai Electric Power Company Xining 810008 China
    2 College of Resources and Environment Henan University of Economics and Law Zhengzhou 450000 China
    3 Northwest Branch Beijing Lostar Science and Technology Development Co., Ltd Beijing 100120 China
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