| 三峡地下电站变顶高尾水洞水动力特性 |
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| 引用本文： | 薛阿强,罗禹权,王列,严伟.三峡地下电站变顶高尾水洞水动力特性[J].长江科学院院报,2002(4). |
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| 作者姓名： | 薛阿强 罗禹权 王列 严伟 |
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| 作者单位： | 长江科学院水工研究所!湖北武汉430010(薛阿强，王列，严伟)，长江科学院长江控制设备研究所!湖北武汉430010(罗禹权) |
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| 摘 要： | 在国内首次应用模型水轮发电机组对三峡地下电站变顶高尾水洞方案进行水力过渡过程试验研究。对水轮机导叶实行分段关闭 ,并求出了二段关闭的最佳拐点 ,试验证实了二段关闭对减小尾水管进口的负压和机组转速上升有明显的作用。通过有关水力参数的测试 ,认为变顶高尾水洞可以满足各项技术要求 ,是一个减少山体开挖、节省投资的新型设计方案。在地下电站中具有广泛的应用前景
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| 关 键 词： | 三峡工程 地下电站 变顶高尾水洞 水力过渡过程 分段关闭 水击压力 机组转速上升 |
Hydrodynamic characteristics of changing top-altitude tailrace tunnel for Three Gorges Project's underground power plant |
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| XUE A qiang,LUO Yu quan,WANG Lie,YAN Wei.Hydrodynamic characteristics of changing top-altitude tailrace tunnel for Three Gorges Project''''s underground power plant[J].Journal of Yangtze River Scientific Research Institute,2002(4). |
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| Authors: | XUE A qiang LUO Yu quan WANG Lie YAN Wei |
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| Abstract: | The test tesearch on hydraulic transient process inside the changing top altitude tailrace tunnel of TGP's underground power plant was conducted for the first time in our country by use of a model generating set.Adopting the piece wise linear closure for guide vanes of turbine,the best inflection point of two step closure (i.e.closed in two kinds of uniform speed)was found,and it was verfied that the method of two step closure has obvious effect for decreasing negative pressures and the rising rates of rotational speed of generating set.Through the measurement of hydraulic parameters,it was regarded that the changing top altitude tailraee tunnel scheme can meet all the technical reqirements,and it is a new type design scheme benificial for decreasing rock excavation and saving engineering investment.It can be widely applied in underground plant. |
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| Keywords: | Three Gorges Project underground power plant changing top altitude tailrace tunnel hydralctic transient process piecewise linear closure water hammer pressure rising rate of rolational speed of generating set |
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