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Research on Large-Signal Stability of DC Microgrid Based on Droop Control

Author

Listed:
  • Haifeng Liang

    (Department of Electrical Engineering, North China Electric Power University, Baoding 071003, China)

  • Yuxi Huang

    (Department of Electrical Engineering, North China Electric Power University, Baoding 071003, China)

  • Hao Sun

    (Department of Electrical Engineering, North China Electric Power University, Baoding 071003, China)

  • Zhiqian Liu

    (Department of Electrical Engineering, North China Electric Power University, Baoding 071003, China)

Abstract

Ensuring the large signal stability of the DC microgrid is the premise of the safe operation of the DC microgrid, but the research on the large-signal stability of microgrids with multiple droop control micro-sources is still scarce. In this paper, a DC microgrid system model with multiple droop control micro-sources was established by appropriate simplification. Addressing the problem that most stability research methods cannot be quantitatively analyzed, the mixed potential function method was used to analyze the large signal stability of the system. However, the criterion obtained by the conventional mixed potential function method is complicated and contains multiple time-varying parameters, which is not convenient for analysis. Therefore, the simple form of the criterion was obtained through simplification and the analysis proved the rationality of the simplification. On this basis, a nonlinear droop control method was proposed to improve the anti-interference ability of the system. Finally, the accuracy of the large signal stability criterion and the effectiveness of nonlinear droop control on the system’s large signal stability were verified by simulation.

Suggested Citation

  • Haifeng Liang & Yuxi Huang & Hao Sun & Zhiqian Liu, 2019. "Research on Large-Signal Stability of DC Microgrid Based on Droop Control," Energies, MDPI, vol. 12(16), pages 1-14, August.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:16:p:3186-:d:259132
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    References listed on IDEAS

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    1. Rutian Wang & Yuyang Wu & Guoqing He & Ying Lv & Jiaxing Du & Yanhao Li, 2018. "Impedance Modeling and Stability Analysis for Cascade System of Three-Phase PWM Rectifier and LLC Resonant Converter," Energies, MDPI, vol. 11(11), pages 1-15, November.
    2. Haifeng Liang & Yue Dong & Yuxi Huang & Can Zheng & Peng Li, 2018. "Modeling of Multiple Master–Slave Control under Island Microgrid and Stability Analysis Based on Control Parameter Configuration," Energies, MDPI, vol. 11(9), pages 1-18, August.
    3. Meiyi Li & Wentao Huang & Nengling Tai & Moduo Yu, 2018. "Lyapunov-Based Large Signal Stability Assessment for VSG Controlled Inverter-Interfaced Distributed Generators," Energies, MDPI, vol. 11(9), pages 1-15, August.
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    Cited by:

    1. Zhiming Zhang & Qing Chen & Ranran Xie & Yi Zheng, 2019. "A Protection System for Improved Ring-Bus DC Microgrids," Energies, MDPI, vol. 12(19), pages 1-14, October.

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