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An Improved Secondary Control Strategy for Dynamic Boundary Microgrids toward Resilient Distribution Systems

Author

Listed:
  • Yijun Wang

    (Shenzhen Power Supply Co., Ltd., Shenzhen 518000, China)

  • Jiaju Shi

    (School of Electrical Engineering, Xi’an Jiaotong University, Xi’an 710000, China)

  • Nan Ma

    (Shenzhen Power Supply Co., Ltd., Shenzhen 518000, China)

  • Guowei Liu

    (Shenzhen Power Supply Co., Ltd., Shenzhen 518000, China)

  • Lisheng Xin

    (Shenzhen Power Supply Co., Ltd., Shenzhen 518000, China)

  • Ziyu Liu

    (School of Electrical Engineering, Xi’an Jiaotong University, Xi’an 710000, China)

  • Dafu Liu

    (School of Electrical Engineering, Xi’an Jiaotong University, Xi’an 710000, China)

  • Ziwen Xu

    (School of Electrical Engineering, Xi’an Jiaotong University, Xi’an 710000, China)

  • Chen Chen

    (School of Electrical Engineering, Xi’an Jiaotong University, Xi’an 710000, China)

Abstract

In order to achieve the flexible and efficient utilization of distributed energy resources, microgrids (MGs) can enhance the self-healing capability of distribution systems. Conventional primary droop control in microgrids exhibits deviations in voltage and frequency and lacks research on voltage–frequency control during network reconfiguration. Therefore, this paper investigates the control strategy of secondary control for voltage and frequency during the process of reconstructing distribution networks to operate in the form of microgrids after faults. Firstly, the mathematical model of three-phase voltage-source inverters with droop control is analyzed. Then, inspired by the generator’s secondary frequency control strategy, an improved secondary control method based on droop control is proposed, and the effectiveness of the improved droop control strategy is verified. Finally, simulation examples of distribution networks with various dynamic boundary topology changes are designed to simulate a relatively stable control result, validating the proposed strategy.

Suggested Citation

  • Yijun Wang & Jiaju Shi & Nan Ma & Guowei Liu & Lisheng Xin & Ziyu Liu & Dafu Liu & Ziwen Xu & Chen Chen, 2024. "An Improved Secondary Control Strategy for Dynamic Boundary Microgrids toward Resilient Distribution Systems," Energies, MDPI, vol. 17(7), pages 1-15, April.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:7:p:1731-:d:1370139
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