Influence of the initial working condition on the hydraulic performance of the pump-turbine during runaway transient scenario

被引：0
|
作者：
Chen Q. [1 ]
Zhang X. [2 ]
He S. [3 ]
机构：
[1] School of Civil Engineering and Architecture, Xiamen University of Technology, Xiamen
[2] School of Environmental Science and Engineering, Xiamen University of Technology, Xiamen
[3] Hubei Provincial Water Resources and Hydropower Planning Survey and Design Institute, Wuhan
来源：
Shuili Xuebao/Journal of Hydraulic Engineering | 2020年 / 51卷 / 07期
关键词：
Flow instability; Hysteresis effect; Numerical simulation; Pump-turbine; Runaway transient scenario;
D O I：
10.13243/j.cnki.slxb.20190844
中图分类号：
学科分类号：
摘要：
Runaway is one of the accident transient scenarios in pumped-storage power stations. During this type of scenario, the pump-turbine operating status varies significantly, inducing increases of pressure pulsations and hydraulic loads on the runner easily. The initial working condition is one of the controlling factors of the runaway scenario, however, its influence on the hydraulic performance of the pump-turbine has not been clear. In this study, the influence was analyzed by the coupled numerical simulations between the one-dimensional pipes and the three-dimensional pump-turbine of a model pumped-storage power system. The results show that the runaway scenario starting from the part-load working condition evidences abrupt variations in the operating trajectory, pressure pulsations, and runner blade radial forces of the pump-turbine; these phenomena do not appear during the runaway scenario starting from the rated working condition. The abrupt variations of the hydraulic performance can be attributed to the transition of runner flow patterns from the stable status to the unstable one during the runaway scenario starting from the part-load working condition. The mechanism of this phenomenon can be attributed to the hysteresis effect of the transient flow patterns, i. e., the instantaneous flow patterns during transients can maintain the corresponding initial flow features to some extent. Therefore, the influence of the initial working condition on the pump-turbine runaway performance should also be considered in the pumped-storage power station, especially when broadening the working range of the pump-turbine. © 2020, China Water Power Press. All right reserved.
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页码：858 / 868
页数：10
相关论文
共 39 条
  • [11] ZUO Z, FAN H, LIU S, Et al., S-shaped characteristics on the performance curves of pump-turbines in turbine mode-A review, Renewable and Sustainable Energy Reviews, 60, pp. 836-851, (2016)
  • [12] 11
  • [13] ZHANG Y, ZHANG Y, WU Y., A review of rotating stall in reversible pump turbine, Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, 231, 7, pp. 1181-1204, (2016)
  • [14] STAUBLI T, SENN F, SALLABERGER M., Instability of pump-turbines during start-up in the turbine mode, Proceedings of Hydro 2008, (2008)
  • [15] WIDMER C, STAUBLI T, LEDERGERBER N., unstable characteristics and rotating stall in turbine brake operation of pump-turbines, Journal of Fluids Engineering, 133, 4, (2011)
  • [16] HASMATUCHI V, FARHAT M, ROTH S, Et al., Experimental evidence of rotating stall in a pump-turbine at off-design conditions in generating mode, Journal of Fluids Engineering, 133, 5, (2011)
  • [17] HASMATUCHI V, ROTH S, BOTERO F, Et al., High-speed flow visualization in a pump-turbine under off-design operating conditions, IOP Conference Series: Earth and Environmental Science, 12, (2010)
  • [18] BOTERO F, HASMATUCHI V, ROTH S, Et al., Non-intrusive detection of rotating stall in pump-turbines, Mechanical Systems and Signal Processing, 48, 1, pp. 162-173, (2014)
  • [19] XIA L S, CHENG Y G, ZHANG X X, Et al., Numerical analysis of rotating stall instabilities of a pump-turbine in pump mode, IOP Conference Series: Earth and Environmental Science, 22, 3, (2014)
  • [20] GENTNER C, SALLABERGER M, WIDMER C, Et al., Numerical and experimental analysis of instability phenomena in pump turbines, IOP Conference Series: Earth and Environmental Science, 15, (2012)
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