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Transient Stability Enhancement Strategy for Islanded Microgrids Based on Energy Storage–Virtual Synchronous Machine Control

Author

Listed:
  • Chenghao Ma

    (College of Electrical Engineering and New Energy, China Three Gorges University, Yichang 443002, China)

  • Jiahang Sun

    (College of Electrical Engineering and New Energy, China Three Gorges University, Yichang 443002, China)

  • Jingguang Huang

    (College of Electrical Engineering and New Energy, China Three Gorges University, Yichang 443002, China)

  • Kaijie Wang

    (State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan 430074, China)

Abstract

In a high percentage of new energy-islanded microgrids, the overall inertia of the system gradually decreases, and the transient stability requirements of the microgrid frequency and voltage become more and more demanding under low-inertia conditions. To improve the transient stability of low-inertia islanded microgrid frequencies and voltages, this paper proposes a transient stability enhancement strategy for islanded microgrids based on energy storage system (ESS)–virtual synchronous generator (VSG) control. Model predictive control (MPC) is added within the active control loop of the VSG to achieve dynamic correction of the active power reference value of the VSG; PI control link is added within the reactive control loop to achieve a fast dynamic response of the reactive power command value. The ESS achieves fast and accurate regulation of frequency and voltage according to the power reference value of the VSG active control loop and the power command value of the reactive control loop simultaneously. Considering the need to ensure the ability of VSG to operate stably during transients, a comprehensive current-limiting technique combining virtual impedance and phase limiting is used to limit the fault current of VSG and maintain its synchronization and stability. Finally, the simulation results verify the strategy’s effectiveness and the superiority of the transient stability enhancement effect.

Suggested Citation

  • Chenghao Ma & Jiahang Sun & Jingguang Huang & Kaijie Wang, 2023. "Transient Stability Enhancement Strategy for Islanded Microgrids Based on Energy Storage–Virtual Synchronous Machine Control," Energies, MDPI, vol. 16(17), pages 1-21, September.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:17:p:6390-:d:1232073
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    References listed on IDEAS

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    1. Chang Yuan & Peilin Xie & Dan Yang & Xiangning Xiao, 2018. "Transient Stability Analysis of Islanded AC Microgrids with a Significant Share of Virtual Synchronous Generators," Energies, MDPI, vol. 11(1), pages 1-19, January.
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    Cited by:

    1. Huixin Xu & Jiahang Sun & Jingguang Huang & Xinyuan Lin & Chenghao Ma, 2024. "Distributed Optimization of Islanded Microgrids Integrating Multi-Type VSG Frequency Regulation and Integrated Economic Dispatch," Energies, MDPI, vol. 17(7), pages 1-19, March.

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