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Transient Stability Analysis of Islanded AC Microgrids with a Significant Share of Virtual Synchronous Generators

Author

Listed:
  • Chang Yuan

    (State Key Laboratory for Alternate Electrical Power System with Renewable Energy Source, North China Electric Power University, Beijing 102206, China)

  • Peilin Xie

    (State Key Laboratory for Alternate Electrical Power System with Renewable Energy Source, North China Electric Power University, Beijing 102206, China)

  • Dan Yang

    (State Key Laboratory for Alternate Electrical Power System with Renewable Energy Source, North China Electric Power University, Beijing 102206, China)

  • Xiangning Xiao

    (State Key Laboratory for Alternate Electrical Power System with Renewable Energy Source, North China Electric Power University, Beijing 102206, China)

Abstract

As an advanced control method that could bring extra inertia and damping characteristics to inverter-based distributed generators, the virtual synchronous generator (VSG) has recently drawn considerable attention. VSGs are expected to enhance the frequency regulation capability of the local power grid, especially the AC microgrid in island mode. However, the cost of that performance promotion is potential instability. In this paper, the unstable phenomena of the islanded microgrid dominated by SGs and distributed generators (DSs) are addressed after mathematical modeling and detailed eigenvalue analyses respectively. The influence of VSG key parameters, e.g., virtual inertia, damping factor, and droop coefficient on system stability is investigated, and the corresponding mathematical calculation method of unstable region is obtained. The theoretical analysis is well supported by time domain simulation results. The predicted frequency oscillation suggests the consideration of stability constrain during the VSG parameters design procedure.

Suggested Citation

  • 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.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:1:p:44-:d:124979
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    Citations

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    Cited by:

    1. 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.
    2. Mihai Sanduleac & Lucian Toma & Mircea Eremia & Irina Ciornei & Constantin Bulac & Ion Triștiu & Andreea Iantoc & João F. Martins & Vitor F. Pires, 2019. "On the Electrostatic Inertia in Microgrids with Inverter-Based Generation Only—An Analysis on Dynamic Stability," Energies, MDPI, vol. 12(17), pages 1-23, August.
    3. Komsan Hongesombut & Suphicha Punyakunlaset & Sillawat Romphochai, 2021. "Under Frequency Protection Enhancement of an Islanded Active Distribution Network Using a Virtual Inertia-Controlled-Battery Energy Storage System," Sustainability, MDPI, vol. 13(2), pages 1-39, January.
    4. Giulio Ferro & Michela Robba & Roberto Sacile, 2020. "A Model Predictive Control Strategy for Distribution Grids: Voltage and Frequency Regulation for Islanded Mode Operation," Energies, MDPI, vol. 13(10), pages 1-27, May.
    5. Gonzalo Abad & Aitor Laka & Gabriel Saavedra & Jon Andoni Barrena, 2018. "Analytical Modeling Approach to Study Harmonic Mitigation in AC Grids with Active Impedance at Selective Frequencies," Energies, MDPI, vol. 11(6), pages 1-31, May.
    6. Danny Ochoa & Sergio Martinez, 2018. "Proposals for Enhancing Frequency Control in Weak and Isolated Power Systems: Application to the Wind-Diesel Power System of San Cristobal Island-Ecuador," Energies, MDPI, vol. 11(4), pages 1-25, April.
    7. Mariano G. Ippolito & Rossano Musca & Eleonora Riva Sanseverino & Gaetano Zizzo, 2022. "Frequency Dynamics in Fully Non-Synchronous Electrical Grids: A Case Study of an Existing Island," Energies, MDPI, vol. 15(6), pages 1-24, March.
    8. Yao Liu & Lin Guan & Fang Guo & Jianping Zheng & Jianfu Chen & Chao Liu & Josep M. Guerrero, 2019. "A Reactive Power-Voltage Control Strategy of an AC Microgrid Based on Adaptive Virtual Impedance," Energies, MDPI, vol. 12(16), pages 1-15, August.
    9. 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.

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