IDEAS home Printed from https://ideas.repec.org/a/eee/renene/v86y2016icp611-622.html
   My bibliography  Save this article

Sensitivity analysis of transient flow of two parallel pump-turbines operating at runaway

Author

Listed:
  • Rezghi, A.
  • Riasi, A.

Abstract

Transient flow analysis in hydroelectric power plants is one of the most important issues for the prevention of undesirable pressure fluctuations in waterways. In this paper sensitivity analysis of hydraulic transient for two parallel pump-turbine units operating at runaway (unstable S-shaped zone of pump-turbine hill-chart) have been numerically investigated. The characteristics of Siah Bishe power plant located at the north of Iran, has been considered. Firstly, simultaneous operation of two units at runaway is simulated. For this purpose, the governing equations of transient flow are solved along the waterways using the method of characteristics and modified Suter transformations. Then, the sensitivity of pressure rise at the spiral case, water level oscillating at surge tank, rotational speed and flow rate and torque oscillation at unstable zone of hill-chart to moment of inertia, head loss coefficient of connection tunnel of surge tank, connection tunnel diameter and acoustic wave velocity has been performed. The results show that the moment of inertia has considerable effect on the maximum torque at unstable condition of runaway. Also, more moment of inertia can well postpone the peak of pressure and rotational speed. The maximum water level of surge tank and the maximum torque at unstable condition of runaway are strongly affected by head loss coefficient of connection tunnel of surge tank and connection tunnel diameter. By using different values for acoustic wave velocity, output conditions don't show any clear trend.

Suggested Citation

  • Rezghi, A. & Riasi, A., 2016. "Sensitivity analysis of transient flow of two parallel pump-turbines operating at runaway," Renewable Energy, Elsevier, vol. 86(C), pages 611-622.
    • Handle: RePEc:eee:renene:v:86:y:2016:i:c:p:611-622
    DOI: 10.1016/j.renene.2015.08.059
    as

    Download full text from publisher

    File URL: http://www.sciencedirect.com/science/article/pii/S0960148115302597
    Download Restriction: Full text for ScienceDirect subscribers only
    File URL: https://libkey.io/10.1016/j.renene.2015.08.059?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    As the access to this document is restricted, you may want to search for a different version of it.

    References listed on IDEAS

    as
    1. Kendir, Tarik Efe & Ozdamar, Aydogan, 2013. "Numerical and experimental investigation of optimum surge tank forms in hydroelectric power plants," Renewable Energy, Elsevier, vol. 60(C), pages 323-331.
    Full references (including those not matched with items on IDEAS)

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.
    1. Rezghi, Ali & Riasi, Alireza & Tazraei, Pedram, 2020. "Multi-objective optimization of hydraulic transient condition in a pump-turbine hydropower considering the wicket-gates closing law and the surge tank position," Renewable Energy, Elsevier, vol. 148(C), pages 478-491.
    2. Manzano-Agugliaro, Francisco & Taher, Myriam & Zapata-Sierra, Antonio & Juaidi, Adel & Montoya, Francisco G., 2017. "An overview of research and energy evolution for small hydropower in Europe," Renewable and Sustainable Energy Reviews, Elsevier, vol. 75(C), pages 476-489.
    3. Chang Xu & Dianwei Qian, 2015. "Governor Design for a Hydropower Plant with an Upstream Surge Tank by GA-Based Fuzzy Reduced-Order Sliding Mode," Energies, MDPI, vol. 8(12), pages 1-16, November.
    4. Guo, Wencheng & Yang, Jiandong, 2018. "Dynamic performance analysis of hydro-turbine governing system considering combined effect of downstream surge tank and sloping ceiling tailrace tunnel," Renewable Energy, Elsevier, vol. 129(PA), pages 638-651.
    5. Wei Huang & Jiming Ma & Xinlei Guo & Huokun Li & Jiazhen Li & Gang Wang, 2021. "Stability Criterion for Mass Oscillation in the Surge Tank of a Hydropower Station Considering Velocity Head and Throttle Loss," Energies, MDPI, vol. 14(17), pages 1-19, August.
    6. Zhang, Jian & Qiu, Weixin & Wang, Qinyi & Yao, Tianyu & Hu, Chao & Liu, Yi, 2024. "Extreme water level of surge chamber in hydropower plant under combined operating conditions," Chaos, Solitons & Fractals, Elsevier, vol. 178(C).
    7. J. Yazdi & A. Hokmabadi & M. R. JaliliGhazizadeh, 2019. "Optimal Size and Placement of Water Hammer Protective Devices in Water Conveyance Pipelines," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 33(2), pages 569-590, January.
    8. Huang, Wei & Yang, Kailin & Ma, Jiming & Xu, Yaowu & Guo, Xinlei & Wang, Jue, 2018. "A new setting criterion of tailrace surge chambers for pumped-storage power plants," Renewable Energy, Elsevier, vol. 116(PA), pages 194-201.
    9. Riasi, Alireza & Tazraei, Pedram, 2017. "Numerical analysis of the hydraulic transient response in the presence of surge tanks and relief valves," Renewable Energy, Elsevier, vol. 107(C), pages 138-146.
    10. Sanghyun Kim & Dooyong Choi, 2022. "Dimensionless Impedance Method for General Design of Surge Tank in Simple Pipeline Systems," Energies, MDPI, vol. 15(10), pages 1-13, May.
    11. Ma, Weichao & Yan, Wenjie & Yang, Jiebin & He, Xianghui & Yang, Jiandong & Yang, Weijia, 2022. "Experimental and numerical investigation on head losses of a complex throttled surge tank for refined hydropower plant simulation," Renewable Energy, Elsevier, vol. 186(C), pages 264-279.

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:eee:renene:v:86:y:2016:i:c:p:611-622. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Catherine Liu (email available below). General contact details of provider: http://www.journals.elsevier.com/renewable-energy .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.