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A 1D-3D Coupling Model to Evaluate Hydropower Generation System Stability

Author

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  • Meng Zhang

    (State Grid Gansu Liujiaxia Hydropower Plant, Yongjing 731600, China
    Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Xianyang 712100, China
    Institute of Water Resources and Hydropower Research, Northwest A&F University, Xianyang 712100, China
    These authors contribute equally to this paper.)

  • Jinhai Feng

    (Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Xianyang 712100, China
    Institute of Water Resources and Hydropower Research, Northwest A&F University, Xianyang 712100, China
    These authors contribute equally to this paper.)

  • Ziwen Zhao

    (Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Xianyang 712100, China
    Institute of Water Resources and Hydropower Research, Northwest A&F University, Xianyang 712100, China)

  • Wei Zhang

    (State Grid Gansu Liujiaxia Hydropower Plant, Yongjing 731600, China)

  • Junzhi Zhang

    (Northwest Engineering Corporation Limited, Xi’an 710000, China)

  • Beibei Xu

    (Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Xianyang 712100, China
    Northwest Engineering Corporation Limited, Xi’an 710000, China)

Abstract

This paper proposes a novel 1D-3D approach for the stability characteristics of the hydropower generation system (HGS) in transition processes. First, a 1D-3D coupling model was established for the HGS in the load-reduction process. Second, a sensitivity analysis of the HGS’s parameters to the rotation speed and discharge was conducted. Third, the pressure pulsation characteristics of the HGS with three typical guide vane openings were analyzed during the load-reduction process. The results show that with the closure of the guide vane, the discharge gradually decreases and it is sensitive to the change in hydraulic parameters. The rotation speed fluctuates at the early stage of the transition process and is easily affected by mechanical parameters. In addition, the pressure pulsation inside the Francis turbine is more intense under small openings than large openings, and the primary frequency of pressure pulsation under three opening degrees is the blade frequency. The 1D-3D coupling model successfully integrates the advantages of traditional methods and provides a reference for predicting system stability and exploring the stability mechanism.

Suggested Citation

  • Meng Zhang & Jinhai Feng & Ziwen Zhao & Wei Zhang & Junzhi Zhang & Beibei Xu, 2022. "A 1D-3D Coupling Model to Evaluate Hydropower Generation System Stability," Energies, MDPI, vol. 15(19), pages 1-13, September.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:19:p:7089-:d:926409
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    References listed on IDEAS

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