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VSG Control Strategy Incorporating Voltage Inertia and Virtual Impedance for Microgrids

Author

Listed:
  • Zipeng Ke

    (National-Local Joint Engineering Laboratory of Digitalize Electrical Design Technology, Wenzhou University, Wenzhou 325035, China)

  • Yuxing Dai

    (National-Local Joint Engineering Laboratory of Digitalize Electrical Design Technology, Wenzhou University, Wenzhou 325035, China)

  • Zishun Peng

    (College of Electrical and Information Engineering, Hunan University, Changsha 410082, China)

  • Guoqiang Zeng

    (National-Local Joint Engineering Laboratory of Digitalize Electrical Design Technology, Wenzhou University, Wenzhou 325035, China)

  • Jun Wang

    (College of Electrical and Information Engineering, Hunan University, Changsha 410082, China)

  • Minying Li

    (Guangdong Zhicheng Champion Group Co., Ltd., Dongguan 523718, China)

  • Yong Ning

    (College of Electrical and Information Engineering, Hunan University, Changsha 410082, China)

Abstract

Virtual synchronous generator (VSG) control lacks voltage inertia and powerful decoupling capabilities. The voltage of the distributed generator (DG) unit controlled by the VSG will be easily affected by power fluctuations and high-frequency noise, and the DG coupling usually makes the VSG control effect unsatisfactory. In order to effectively reduce power fluctuations, the influence of high-frequency noise on voltage, the influence of coupling on the power regulation, and effectively improve the economy of the economic system, the improved VSG control that combines voltage inertia and virtual impedance is proposed in this paper. The second-order inertia in the proposed VSG control strategy can minimize the voltage change rate and filter high-frequency noise from the excitation and virtual impedance. The virtual impedance in the proposed VSG control strategy can simulate the actual impedance to change the line characteristics, so the coupling of the DG unit can be reduced. Experimental results based on the microgrid platform prove the feasibility of improving the VSG control.

Suggested Citation

  • Zipeng Ke & Yuxing Dai & Zishun Peng & Guoqiang Zeng & Jun Wang & Minying Li & Yong Ning, 2020. "VSG Control Strategy Incorporating Voltage Inertia and Virtual Impedance for Microgrids," Energies, MDPI, vol. 13(16), pages 1-15, August.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:16:p:4263-:d:400287
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    References listed on IDEAS

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    2. Bin Li & Lin Zhou, 2017. "Power Decoupling Method Based on the Diagonal Compensating Matrix for VSG-Controlled Parallel Inverters in the Microgrid," Energies, MDPI, vol. 10(12), pages 1-13, December.
    3. 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.
    4. Fathabadi, Hassan, 2017. "Novel fast and high accuracy maximum power point tracking method for hybrid photovoltaic/fuel cell energy conversion systems," Renewable Energy, Elsevier, vol. 106(C), pages 232-242.
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