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Measuring the Dynamic Characteristics of a Low Specific Speed Pump—Turbine Model

Author

Listed:
  • Eve Cathrin Walseth

    (Waterpower Laboratory, NTNU, Alfred Getz vei 4, Trondheim 7491, Norway)

  • Torbjørn K. Nielsen

    (Waterpower Laboratory, NTNU, Alfred Getz vei 4, Trondheim 7491, Norway)

  • Bjørnar Svingen

    (Waterpower Laboratory, NTNU, Alfred Getz vei 4, Trondheim 7491, Norway
    Rainpower, S.P.Andersen vei 7, Trondheim 7031, Norway)

Abstract

This paper presents results from an experiment performed to obtain the dynamic characteristics of a reversible pump-turbine model. The characteristics were measured in an open loop system where the turbine initially was run on low rotational speed before the generator was disconnected allowing the turbine to go towards runaway. The measurements show that the turbine experience damped oscillations in pressure, speed and flow rate around runaway corresponding with presented stability criterion in published literature. Results from the experiment is reproduced by means of transient simulations. A one dimensional analytical turbine model for representation of the pump-turbine is used in the calculations. The simulations show that it is possible to reproduce the physics in the measurement by using a simple analytical model for the pump-turbine as long as the inertia of the water masses in the turbine are modeled correctly.

Suggested Citation

  • Eve Cathrin Walseth & Torbjørn K. Nielsen & Bjørnar Svingen, 2016. "Measuring the Dynamic Characteristics of a Low Specific Speed Pump—Turbine Model," Energies, MDPI, vol. 9(3), pages 1-12, March.
  • Handle: RePEc:gam:jeners:v:9:y:2016:i:3:p:199-:d:65766
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    Citations

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    Cited by:

    1. Kan, Kan & Zheng, Yuan & Chen, Huixiang & Zhou, Daqing & Dai, Jing & Binama, Maxime & Yu, An, 2020. "Numerical simulation of transient flow in a shaft extension tubular pump unit during runaway process caused by power failure," Renewable Energy, Elsevier, vol. 154(C), pages 1153-1164.
    2. Mao, Xiuli & Pavesi, Giorgio & Chen, Diyi & Xu, Hengshan & Mao, Gaojun, 2019. "Flow induced noise characterization of pump turbine in continuous and intermittent load rejection processes," Renewable Energy, Elsevier, vol. 139(C), pages 1029-1039.
    3. Fu, Xiaolong & Li, Deyou & Wang, Hongjie & Zhang, Guanghui & Li, Zhenggui & Wei, Xianzhu, 2020. "Numerical simulation of the transient flow in a pump-turbine during load rejection process with special emphasis on hydraulic acoustic effect," Renewable Energy, Elsevier, vol. 155(C), pages 1127-1138.
    4. Hu, Jinhong & Yang, Jiebin & Zeng, Wei & Zhao, Zhigao & Yang, Jiandong, 2021. "Hydraulic interaction of two parallel pump-turbines in constant-speed oscillation: Measurement, simulation, and sensitivity analysis," Renewable Energy, Elsevier, vol. 176(C), pages 269-279.
    5. Li, Deyou & Fu, Xiaolong & Zuo, Zhigang & Wang, Hongjie & Li, Zhenggui & Liu, Shuhong & Wei, Xianzhu, 2019. "Investigation methods for analysis of transient phenomena concerning design and operation of hydraulic-machine systems—A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 101(C), pages 26-46.
    6. Iliev, Igor & Trivedi, Chirag & Dahlhaug, Ole Gunnar, 2019. "Variable-speed operation of Francis turbines: A review of the perspectives and challenges," Renewable and Sustainable Energy Reviews, Elsevier, vol. 103(C), pages 109-121.
    7. Fu, Xiaolong & Li, Deyou & Wang, Hongjie & Zhang, Guanghui & Li, Zhenggui & Wei, Xianzhu, 2018. "Influence of the clearance flow on the load rejection process in a pump-turbine," Renewable Energy, Elsevier, vol. 127(C), pages 310-321.
    8. Fu, Shifeng & Zheng, Yuan & Kan, Kan & Chen, Huixiang & Han, Xingxing & Liang, Xiaoling & Liu, Huiwen & Tian, Xiaoqing, 2020. "Numerical simulation and experimental study of transient characteristics in an axial flow pump during start-up," Renewable Energy, Elsevier, vol. 146(C), pages 1879-1887.

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