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Damping Formation Mechanism and Damping Injection of Virtual Synchronous Generator Based on Generalized Hamiltonian Theory

Author

Listed:
  • Yun Zeng

    (Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China)

  • Jing Qian

    (Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China)

  • Fengrong Yu

    (Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China)

  • Hong Mei

    (Department of Information Engineering, City College, Kunming University of Science and Technology, Kunming 650051, China)

  • Shige Yu

    (Department of Engineering Mechanics, Kunming University of Science and Technology, Kunming 650500, China)

Abstract

Invertor as a virtual synchronous generator (VSG) to provide virtual inertia and damping can improve the stability of a microgrid, in which the damping is one of the fundamental problems in dynamics. From the view of the Hamiltonian dynamics, this paper researches the damping formation mechanism and damping injection control of VSG. First, based on the energy composition and dynamic characteristics of VSG, the differential equations system of VSG is established and is transformed into the generalized Hamiltonian system. Second, the effects of the three parameters of VSG, the damping coefficient D, active power droop coefficient, and time constant of excitation T E on damping characteristics are researched from a dynamic perspective, and simulation research is carried out with an isolated microgrid. Lastly, the control design method of Hamiltonian structure corrections used to add the damping factor and design the equivalent control inject damping to improve the stability of the isolated microgrid. Research shows that the voltage and frequency stability of the isolated microgrid can be effectively improved by selecting three key parameters of VSG and damping injection control. The innovations of this paper are 1. The Hamiltonian model of the inverter is deduced and established by taking the inverter as a virtual generator. 2. Based on the Hamiltonian model, damping characteristics of inverter in the microgrid are studied. 3. Hamiltonian structure correction method is applied to the inverter, and equivalent damping injection is designed to improve the stability of the microgrid.

Suggested Citation

  • Yun Zeng & Jing Qian & Fengrong Yu & Hong Mei & Shige Yu, 2021. "Damping Formation Mechanism and Damping Injection of Virtual Synchronous Generator Based on Generalized Hamiltonian Theory," Energies, MDPI, vol. 14(21), pages 1-14, October.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:21:p:7082-:d:668599
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    References listed on IDEAS

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    1. Yanfeng Ma & Zijian Lin & Rennan Yu & Shuqiang Zhao, 2018. "Research on Improved VSG Control Algorithm Based on Capacity-Limited Energy Storage System," Energies, MDPI, vol. 11(3), pages 1-17, March.
    2. Gaber Magdy & Abualkasim Bakeer & Morsy Nour & Eduard Petlenkov, 2020. "A New Virtual Synchronous Generator Design Based on the SMES System for Frequency Stability of Low-Inertia Power Grids," Energies, MDPI, vol. 13(21), pages 1-17, October.
    3. Hailin Hu & Fu Feng & Tao Wang & Xiaofeng Wan & Xiaohua Ding, 2020. "Optimization Control Strategy for Islanded Parallel Virtual Synchronous Generators," Mathematical Problems in Engineering, Hindawi, vol. 2020, pages 1-11, October.
    4. 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.
    5. Hirase, Yuko & Abe, Kensho & Sugimoto, Kazushige & Sakimoto, Kenichi & Bevrani, Hassan & Ise, Toshifumi, 2018. "A novel control approach for virtual synchronous generators to suppress frequency and voltage fluctuations in microgrids," Applied Energy, Elsevier, vol. 210(C), pages 699-710.
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