沙坪二级电站水力调控方法研究

Research on the Hydraulic Control Method of Shaping II Hydropower Station

我国现阶段水利工程群的调控以人工经验为主,因缺乏对水流时滞性的科学分析,难以满足新时期智能调控的迫切需求。枕头坝一级~沙坪二级区间位于大渡河流域,坡度陡,水力调控研究难度大,目前主要依靠人工经验开展水力调控方案的制定。以该区域为例,利用一维非恒定流数值模拟模型,对水流时滞性进行了系统分析,计算上游流量变化、下游水位稳定时下游边界的理想流量过程,提出了一种计算快捷、操作可靠的水力调控方法,经水动力模拟验证,该调控方法产生的最大水位波动在0.2 m左右,能够保证河渠的安全。最后基于该调控方法以及敏感性分析,构建了能够快速生成沙坪二级电站不同情景下的水力调控方案的公式。

At this stage,China’s water conservancy engineering group is still based on manual experience.Due to the lack of scientific analysis of the time lag of water flow,it is difficult to meet the urgent needs of intelligent regulation in the new era.The Zhentouba I~Shaping II section is located in the Dadu River Basin,with steep slopes and difficult hydraulic control research.At present,the hydraulic control plan is mainly based on manual experience.Taking this area as an example,this paper uses a one-dimensional unsteady flow numerical simulation model to systematically analyze the time lag of water flow,calculate the ideal flow process of the downstream boundary when the upstream flow changes and the downstream water level is stable,and a fast calculation method is proposed.The reliable hydraulic control method has been verified by hydrodynamic simulation,and the maximum water level fluctuation produced by the control method is about 0.2 m,which can ensure the safety of the river canal.Finally,based on the control method and the orthogonal test method of sensitivity analysis,a formula that can quickly generate the hydraulic control plan under different scenarios of the Shaping II Hydropower Station is constructed.