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Equalized Distributed Control Strategy for AC Microgrid Energy Storage SOCs

Author

Listed:
  • Qingsheng Li

    (Guizhou Power Grid Co., Ltd., Power Grid Planning Research Center, Guiyang 557316, China)

  • Kaicheng Lu

    (College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China)

  • Yongqing Zhu

    (Guizhou Power Grid Co., Ltd., Power Grid Planning Research Center, Guiyang 557316, China)

  • Zhaofeng Zhang

    (Guizhou Power Grid Co., Ltd., Power Grid Planning Research Center, Guiyang 557316, China)

  • Zhen Li

    (Guizhou Power Grid Co., Ltd., Power Grid Planning Research Center, Guiyang 557316, China)

Abstract

Most of the previous SOC equalization methods for microgrid energy storage target DC microgrids and use centralized control structures, while in recent years many researchers have begun to focus on a decentralized, communication-based implementation of distributed control structures. In this paper, based on the existing research, we use the multi-agent system (MAS) structure and dynamic consistency algorithm (DCA) to realize the estimation of the SOC mean value of microgrid energy storage obtained by each agent in the system. For the problems of the iterative convergence that exists in the distributed control, such as being too slow, too frequent communication, stability, etc., we optimally select the parameters of the consistency iterative summation to improve convergence. In addition, we use the event-driven method to further reduce the unnecessary communication frequency. Finally, a numerical simulation model of the AC microgrid is established by Matlab to verify the effectiveness of the method, which reduces the communication volume by about 50% while maintaining the effect of the control strategy.

Suggested Citation

  • Qingsheng Li & Kaicheng Lu & Yongqing Zhu & Zhaofeng Zhang & Zhen Li, 2024. "Equalized Distributed Control Strategy for AC Microgrid Energy Storage SOCs," Energies, MDPI, vol. 17(18), pages 1-22, September.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:18:p:4695-:d:1482146
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