某抽水蓄能电站下库进出水口水沙运动特性试验研究

发布时间：2018-03-16 12:08

本文选题：抽水蓄能电站　切入点：模型试验　出处：《泥沙研究》2017年02期 　论文类型：期刊论文

【摘要】：利用河工模型对某抽水蓄能电站下库区进行了特征洪水过程及电站运行的联合模拟试验。试验表明在输沙槽与拦沙潜堰共同作用下,电站进出水口的含沙量得到有效控制。在来水含沙量低于3kg/m3时,进出水口含沙量都满足电站运行要求,但是在含沙量较高的洪水期,底部浑水会逆行至电站进出水口附近,导致过机含沙量较高,因此提出了增设非封闭式拦沙潜坝的修改方案。修改方案改善了进出水口前的水流结构,起到了良好的拦沙截淤作用,进出水口前含沙量及泥沙淤积大幅减少,蓄能期过机含沙量降低13%~22%。在含沙量较大的洪水期,电站不宜抽水运用,但适时采用发电运行有助于减轻下库进出水口前的泥沙淤积。
[Abstract]:The combined simulation tests of characteristic flood process and power station operation in the reservoir area of a pumped-storage power station are carried out by using river engineering model. The results show that under the joint action of sediment conveyance channel and sediment barrier and submersible Weir, The sediment content of the inlet and outlet of the power station is effectively controlled. When the sediment content of the incoming water is less than 3 kg / m ~ 3, the sediment content of the inlet and outlet meets the operational requirements of the power station, but in the flood period with high sediment content, the bottom muddy water will retrograde to the vicinity of the inlet and outlet of the power station. As a result of the high sediment content in the machine, a modified scheme is put forward for the addition of an unenclosed submersible silt dam. The modified scheme improves the water flow structure before the inlet and outlet, and plays a good role in sediment interception and siltation. The sediment content and sediment deposition before the inlet and outlet are greatly reduced, and the sediment content during the storage period is reduced by 13% and 22%. In the flood period with high sediment content, the power station is not suitable for pumping water, but the timely operation of power generation is helpful to reduce the sediment deposition before the inlet and outlet of the reservoir.
【作者单位】：华北水利水电大学水利学院;河南天池抽水蓄能电有限公司;
【基金】：国家自然科学基金项目(51579103)
【分类号】：TV149;TV732.1

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