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Evolution mechanism of water column separation in pump turbine: Model experiment and occurrence criterion

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  • He, Xianghui
  • Yang, Jiandong
  • Yang, Jiebin
  • Zhao, Zhigao
  • Hu, Jinhong
  • Peng, Tao

Abstract

Whether the superposition of pressure pulsation and water hammer pressure caused by the fast closing of guide vanes causes water column separation in draft tube inlets is a hot topic in engineering and academic fields. It is also not known whether the bridging of water column separation endangers the operation of the units. This study uses a model pumped storage power station platform with two units to perform water column separation. Data on the pressure pulsation at different measurement points, discharges, and speeds are collected by an acquisition system, whereas the development process of water column separation is characterized by a high-speed camera. The measured pressure is decomposed into the water hammer pressure, which migrates with the unit operation point and pressure pulsation. The test results reveal that the pressure in the inlet section of the draft tube below the vaporization pressure that lasts for several seconds is a sufficient and necessary condition for water column separation to occur. The water hammer pressure has a significant influence on the water column separation, while low-frequency pressure pulsation has less influence. Water column separation is divided into four stages: starting, improvement, separation, and bridging. The main frequency of the pressure pulsation in the water column separation process is the frequency of the water hammer caused by load rejection and has a value of 0.47f/fn. Cavity bridging generates a frequency of 0.30f/fn. The flow-speed curve remains in the braking condition of turbine for 1.25 s. The separation and part of the bridging stage occur under the braking condition of turbine.

Suggested Citation

  • He, Xianghui & Yang, Jiandong & Yang, Jiebin & Zhao, Zhigao & Hu, Jinhong & Peng, Tao, 2023. "Evolution mechanism of water column separation in pump turbine: Model experiment and occurrence criterion," Energy, Elsevier, vol. 265(C).
    • Handle: RePEc:eee:energy:v:265:y:2023:i:c:s0360544222032753
    DOI: 10.1016/j.energy.2022.126389
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    References listed on IDEAS

    as
    1. Zhao, Zhigao & Yang, Jiandong & Chung, C.Y. & Yang, Weijia & He, Xianghui & Chen, Man, 2021. "Performance enhancement of pumped storage units for system frequency support based on a novel small signal model," Energy, Elsevier, vol. 234(C).
    2. Yu, An & Wang, Yongshuai & Tang, Qinghong & Lv, Ruirui & Yang, Zhongpo, 2021. "Investigation of the vortex evolution and hydraulic excitation in a pump-turbine operating at different conditions," Renewable Energy, Elsevier, vol. 171(C), pages 462-478.
    3. Zhao, Zhigao & Yang, Jiandong & Huang, Yifan & Yang, Weijia & Ma, Weichao & Hou, Liangyu & Chen, Man, 2021. "Improvement of regulation quality for hydro-dominated power system: quantifying oscillation characteristic and multi-objective optimization," Renewable Energy, Elsevier, vol. 168(C), pages 606-631.
    4. Zhang, Xiaoxi & Cheng, Yongguang & Yang, Zhiyan & Chen, Qiuhua & Liu, Demin, 2021. "Water column separation in pump-turbine after load rejection: 1D-3D coupled simulation of a model pumped-storage system," Renewable Energy, Elsevier, vol. 163(C), pages 685-697.
    5. Jurasz, Jakub & Dąbek, Paweł B. & Kaźmierczak, Bartosz & Kies, Alexander & Wdowikowski, Marcin, 2018. "Large scale complementary solar and wind energy sources coupled with pumped-storage hydroelectricity for Lower Silesia (Poland)," Energy, Elsevier, vol. 161(C), pages 183-192.
    6. Yu, An & Zou, Zhipeng & Zhou, Daqing & Zheng, Yuan & Luo, Xianwu, 2020. "Investigation of the correlation mechanism between cavitation rope behavior and pressure fluctuations in a hydraulic turbine," Renewable Energy, Elsevier, vol. 147(P1), pages 1199-1208.
    7. Goyal, Rahul & Gandhi, Bhupendra K., 2018. "Review of hydrodynamics instabilities in Francis turbine during off-design and transient operations," Renewable Energy, Elsevier, vol. 116(PA), pages 697-709.
    8. Cheng, Huan & Zhou, Lingjiu & Liang, Quanwei & Guan, Ziwu & Liu, Demin & Wang, Zhaoning & Kang, Wenzhe, 2020. "A method of evaluating the vortex rope strength in draft tube of Francis turbine," Renewable Energy, Elsevier, vol. 152(C), pages 770-780.
    9. Zhou, Xing & Shi, Changzheng & Miyagawa, Kazuyoshi & Wu, Hegao, 2021. "Effect of modified draft tube with inclined conical diffuser on flow instabilities in Francis turbine," Renewable Energy, Elsevier, vol. 172(C), pages 606-617.
    10. Zhang, Yuning & Liu, Kaihua & Xian, Haizhen & Du, Xiaoze, 2018. "A review of methods for vortex identification in hydroturbines," Renewable and Sustainable Energy Reviews, Elsevier, vol. 81(P1), pages 1269-1285.
    11. 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.
    12. Laouari, Ahmed & Ghenaiet, Adel, 2021. "Investigation of steady and unsteady cavitating flows through a small Francis turbine," Renewable Energy, Elsevier, vol. 172(C), pages 841-861.
    13. Zhang, Wenwu & Chen, Zhenmu & Zhu, Baoshan & Zhang, Fei, 2020. "Pressure fluctuation and flow instability in S-shaped region of a reversible pump-turbine," Renewable Energy, Elsevier, vol. 154(C), pages 826-840.
    14. Su, Wen-Tao & Binama, Maxime & Li, Yang & Zhao, Yue, 2020. "Study on the method of reducing the pressure fluctuation of hydraulic turbine by optimizing the draft tube pressure distribution," Renewable Energy, Elsevier, vol. 162(C), pages 550-560.
    15. Jiawei Ye & Wei Zeng & Zhigao Zhao & Jiebin Yang & Jiandong Yang, 2020. "Optimization of Pump Turbine Closing Operation to Minimize Water Hammer and Pulsating Pressures During Load Rejection," Energies, MDPI, vol. 13(4), pages 1-18, February.
    16. Alvarez, Gonzalo E., 2020. "Operation of pumped storage hydropower plants through optimization for power systems," Energy, Elsevier, vol. 202(C).
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    2. Lei, Shuaihao & Cheng, Li & Yang, Weixing & Xu, Wentao & Yu, Lei & Luo, Can & Jiao, Weixuan & Shen, Jiantao, 2024. "Dynamic multiscale pressure fluctuation features extraction of mixed-flow pump as turbine (PAT) and flow state recognition of the outlet passage using variational mode decomposition and refined compos," Energy, Elsevier, vol. 305(C).
    3. He, Xianghui & Hu, Jinhong & Zhao, Zhigao & Lin, Jie & Xiao, Pengfei & Yang, Jiandong & Yang, Jiebin, 2023. "Water column separation under one-after-another load rejection in pumped storage station," Energy, Elsevier, vol. 278(C).
    4. Ma, Weichao & Zhao, Zhigao & Yang, Jiebin & Lai, Xu & Liu, Chengpeng & Yang, Jiandong, 2024. "A transient analysis framework for hydropower generating systems under parameter uncertainty by integrating physics-based and data-driven models," Energy, Elsevier, vol. 297(C).
    5. Zhao, Zhigao & Chen, Fei & He, Xianghui & Lan, Pengfei & Chen, Diyi & Yin, Xiuxing & Yang, Jiandong, 2024. "A universal hydraulic-mechanical diagnostic framework based on feature extraction of abnormal on-field measurements: Application in micro pumped storage system," Applied Energy, Elsevier, vol. 357(C).

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