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Passive Enhancement Control of Voltage-controlled Inverters in Grid-connected Microgrids Considering Control Delay and Variation in Grid Impedance
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Li CHEN, Yongbo ZHOU, Ruiqi LI, Xiang WEI, Hao YUAN
Journal of Power Supply | 2024, 22(5) : 203 - 212
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Journal of Power Supply | 2024, 22(5): 203-212
• Renewable Energy System •
Passive Enhancement Control of Voltage-controlled Inverters in Grid-connected Microgrids Considering Control Delay and Variation in Grid Impedance
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Li CHEN, Yongbo ZHOU, Ruiqi LI, Xiang WEI, Hao YUAN
Affiliations
  • Information and Communication Corporation State Grid Gansu Electric Power Company Lanzhou 730050 China
Published: 2024-09-30 doi: 10.13234/j.issn.2095-2805.2024.5.203
Outline
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With the increasing attention to environmental issues, more and more distributed energy systems represented by microgrids are appearing in the power system, which also poses some challenges to the traditional power systems. For example, the delay in digital control system, variations in grid impedance of weak grid and the interaction between parallel converters in microgrids will cause adverse effects on the stable operation of microgrids. On this basis, a novel type of grid-forming control method for microgrid considering control delay and variation in grid impedance is put forward to enhance the stability of microgrids under uncertainties. First, the above problems are modeled, and a delay compensation method is proposed to improve the robustness of the control system with respect to the variation in grid impedance. Then, a feedforward loop is introduced into the control system to protect it from the interference of parallel inverters in microgrids. Finally, experimental results demonstrate the effectiveness and superiority of the proposed control method.

Control delay  /  interaction  /  grid-forming inverter  /  microgrid  /  stability
Li CHEN, Yongbo ZHOU, Ruiqi LI, Xiang WEI, Hao YUAN. Passive Enhancement Control of Voltage-controlled Inverters in Grid-connected Microgrids Considering Control Delay and Variation in Grid Impedance[J]. Journal of Power Supply, 2024 , 22 (5) : 203 -212 . DOI: 10.13234/j.issn.2095-2805.2024.5.203
Funding
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  • National Natural Science Foundation of China(51777027)
Appendix
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Year 2024 volume 22 Issue 5
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Article Info
doi: 10.13234/j.issn.2095-2805.2024.5.203
  • Receive Date：2021-06-28
  • Online Date：2025-07-20
  • Published：2024-09-30
Article Data
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History
  • Received：2021-06-28
  • Revised：2021-08-22
  • Accepted：2021-09-13
Funding
National Natural Science Foundation of China(51777027)
Affiliations
    Information and Communication Corporation State Grid Gansu Electric Power Company Lanzhou 730050 China
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