云阳建全抽水蓄能电站水库泥沙淤积及回水特征分析

Analysis on Reservoir Sedimentation and Backwater Characteristics of Jianquan Pump Storage Power Station in Yunyang

摘要:

泥沙淤积和水库回水分析对合理确定抽水蓄能电站进/出水口高程、机电设备选型、拦排沙措施、水沙调度方式和淹没范围等工程设计有着非常重要的意义。此文针对新建云阳建全抽水蓄能电站具体实际案例,从泥沙淤积量、过机含沙量和水库回水计算3个方面进行分析计算,采用一维恒定非均匀泥沙数学模型,研究拟建抽水蓄能电站在不同工况下的上下水库河道淤积量及淤积形态、过机含沙量和颗粒级配、水库回水特征等,为类似工程确定设计规模和工程运行管理提供技术参考和科学依据。

Abstract:

The analysis of sedimentation and reservoir backwater is of great significance for reasonably determining the elevation of inlet/outlet of pump storage power stations, the selection of electromechanical equipment, sediment interception and discharge measures, water and sediment dispatching methods, and submergence scope in engineering design. Focusing on the specific case of the newly-built Jianquan Pump Storage Power Station in Yunyang, this paper conducts analysis and calculation from three aspects: sedimentation amount, sediment concentration through turbines. and reservoir backwater calculation. A one-dimensional steady non-uniform sediment mathematical model is adopted to study the channel sedimentation amount, sedimentation morphology, sediment concentration through turbines, particle size distribution, and reservoir backwater characteristics of the upper and lower reservoirs of the station under different working conditions. It provides technical references and scientific bases for similar projects to determine the engineering design scale and engineering operation management.