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Analysis of Inertia Characteristics of Direct-Drive Permanent-Magnet Synchronous Generator in Micro-Grid

Author

Listed:
  • Donghui Zhang

    (School of Electrical and Information Engineering, Hunan University of Technology, Zhuzhou 412008, China)

  • Yongbin Wu

    (School of Electrical and Control Engineering, Shaanxi University of Science & Technology, Xi’an 710021, China)

  • Liansong Xiong

    (School of Automation, Nanjing Institute of Technology, Nanjing 211167, China)

  • Chengyong Zhao

    (The State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources (North China Electric Power University), Beijing 102206, China)

Abstract

Micro-grid has received extensive attention as an effective way to absorb new energy. Compared to large power systems, the micro-grid system consisting of power electronics is relatively weak due to the lack of support for synchronous machines. In this paper, the direct-drive wind turbine (WT) is connected to the low-inertia micro-grid as the research background. Based on the virtual inertia control of the WT, the inertia source and the physical mechanism of the WT connected to the micro-grid system are studied. The inertia characteristics of the rotor of the WT on the electromechanical time-scale, the DC side capacitor on the DC voltage time-scale, and the simulated grid under the droop control are analyzed. The research results show that under the control of the system, the inertia of the system is derived from the WT, DC capacitor, and the micro-grid simulated by droop control converter. The equivalent inertia of each link is determined by the control parameters, steady-state operating point, and structural parameters. The resulting inertia characteristics will have frequency domain characteristics under control. Finally, the correctness of the system inertia analysis conclusion is verified by simulation and experiment.

Suggested Citation

  • Donghui Zhang & Yongbin Wu & Liansong Xiong & Chengyong Zhao, 2019. "Analysis of Inertia Characteristics of Direct-Drive Permanent-Magnet Synchronous Generator in Micro-Grid," Energies, MDPI, vol. 12(16), pages 1-17, August.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:16:p:3141-:d:257999
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    References listed on IDEAS

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    1. Liancheng Xiu & Liansong Xiong & Ping Yang & Zhiliang Kang, 2018. "Inertial and Damping Characteristics of DC Distributed Power Systems Based on Frequency Droop Control," Energies, MDPI, vol. 11(9), pages 1-14, September.
    2. Yongbin Wu & Donghui Zhang & Liansong Xiong & Sue Wang & Zhao Xu & Yi Zhang, 2019. "Modeling and Mechanism Investigation of Inertia and Damping Issues for Grid-Tied PV Generation Systems with Droop Control," Energies, MDPI, vol. 12(10), pages 1-17, May.
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    Cited by:

    1. Changqing Chen & Xinran Li, 2021. "Configuration Method and Multi-Functional Strategy for Embedding Energy Storage into Wind Turbine," Energies, MDPI, vol. 14(17), pages 1-21, August.
    2. Feng Wang & Lizheng Sun & Zhang Wen & Fang Zhuo, 2022. "Overview of Inertia Enhancement Methods in DC System," Energies, MDPI, vol. 15(18), pages 1-25, September.

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