金安桥水电站尾水疏浚效益分析  

Analysis of the Benefit of Tailwater Channel Dredging of Jin'anqiao Hydropower Station

作　　者：杨青远[1] 陈文彬 程紫璇 黄卫 YANG Qingyuan;CHEN Wenbin;CHENG Zixuan;HUANG Wei(Changjiang River Scientific Research Institute,Wuhan 430010,Hubei,China;Jin'anqiao Hydropower Station Co.,Ltd.,Lijiang 674104,Yunnan,China)

机构地区：[1]长江水利委员会长江科学院,湖北武汉430010 [2]金安桥水电站有限公司,云南丽江674100

出　　处：《水力发电》2025年第1期57-61,共5页Water Power

基　　金：中央级公益性科研院所基本科研业务费专项资金资助项目(CKSF2021482SL)。

摘　　要：金安桥水电站下游尾水河道内存在施工期下游围堰拆除残留体和凸起堆积体,抬高了电站尾水位,对发电效益产生了一定影响。采用不同下游水位顶托条件下精细化水位流量关系,在仅考虑非泄洪时段疏浚增加水头带来的发电效益的基础上,通过水位流量实测资料分析和平面二维水动力学模拟,对金安桥水库下游水位流量关系和坝下两处凸起堆积体疏浚后发电效益进行了分析。结果表明,疏浚前两处凸起堆积体对水流运动阻碍明显,疏浚后,发电效益显著。研究方法避免了简单采用水头增加量计算发电效益增加而导致高估疏浚效益,可为其他水电站尾水疏浚效益分析提供借鉴。In downstream channel of Jin'anqiao Hydropower Station,there are remnants and raised accumulations from the demolition of downstream cofferdam during construction period,which raise the tailwater level of power station and have a certain impact on power generation efficiency.Using the refined water level-flow relationship under different downstream backwater level conditions,and only considering the power generation benefits brought by the water head increase during non-discharge periods,the relationship of water level and discharge in the downstream of Jinanqiao Reservoir and the power generation benefit after dredging the two raised accumulations under the dam are analyzed through analyzing the measured water level and flow data and two-dimensional hydrodynamic simulation.The results show that the two raised accumulations significantly hinder the movement of water flow,and the power generation benefits are significant after dredging.The research method avoids the overestimation of dredging benefits caused by simply using the increase in water head to calculate the increase in power generation benefits,and can provide a reference for the tailwater dredging benefit analyses of other hydropower stations.

关 键 词：水动力学模型 尾水河道疏浚 下游水库顶托 疏浚效益 金安桥水电站 

分 类 号：TV851[水利工程—水利水电工程]