摘要
金沙江下游乌东德、白鹤滩、溪洛渡、向家坝四座水电站是长江防洪体系的重要组成部分。乌东德和白鹤滩水电站的建成运行,一方面使防洪调度的灵活性大大提高,另一方面也使得四座水库如何配合才能充分发挥梯级综合效益的问题变得更加复杂。以金沙江下游乌东德、白鹤滩、溪洛渡、向家坝梯级电站为研究对象,构建梯级电站优化调度模型,采用非线性规划和改进逐步优化混合算法求解,并基于长系列来水分析了梯级电站汛期及蓄水期的优化调度策略。结果表明:不同的来水条件下梯级电站呈现出不同的水库运用差异,若来水整体偏枯,则乌东德、溪洛渡、向家坝先释放防洪库容,白鹤滩后释放防洪库容;若来水前期偏枯后期偏丰,则乌东德、溪洛渡先释放防洪库容,白鹤滩、向家坝后释放防洪库容;若来水前期偏丰后期偏枯,则乌东德、白鹤滩、溪洛渡先释放防洪库容,向家坝后释放防洪库容;若来水整体偏丰,则乌东德、白鹤滩先释放防洪库容,溪洛渡、向家坝后释放防洪库容;四库防洪库容的运用随来水特征呈现出不同的分配比例。来水占比与梯级释放防洪库容占比呈现出较强的线性相关关系,通过线性拟合函数可以估计出各月的梯级防洪库容释放量。研究成果可为金沙江下游梯级电站的调度提供参考。
The four hydropower stations of Wudongde,Baihetan,Xiluodu,and Xiangjiaba in the lower reaches of Jinsha River are important components of the Yangtze River flood control system.The operation of the hydropower stations in Wudongde and Baihetan not only greatly improves the flexibility of flood control scheduling,but also gives full play to the comprehensive benefits of the four reservoirs.In this study,the optimal dispatching model of cascade hydropower stations is applied to the Wudongde,Baihetan,Xiluodu and Xiangjiaba stations in the lower reaches of Jinsha River.A hybrid algorithm based on nonlinear programming and improved progressive optimality algorithm is used to solve this model.Based on long series historical inflow data,the optimal dispatching strategy of cascade hydropower stations during flood and impoundment periods is analyzed.The results show that the cascade hydropower stations have different strategies of reservoir capacity utilization under different inflow conditions.If the inflow is dry in the whole period,the flood control capacity of Wudongde,Xiluodu and Xiangjiaba will be used first before Baihetan.If the inflow is dry in the early period and rich in the later,the flood control capacity of Wudongde and Xiluodu will be used first before Baihetan and Xiangjiaba.If the inflow is rich in the early period and dry in the later,the flood control capacity of Wudongde,Baihetan,Xiluodu will be used first before Xiangjiaba.If the inflow is rich in the whole period,the flood control capacity of Wudongde and Baihetan will be used first before Xiluodu and Xiangjiaba.The utilization of flood control capacity of the four reservoirs presents different distribution proportions with inflow characteristics.There is a significant linear correlation between the proportion of water volume and that of cascade flood control capacity utilization,and the monthly release of cascade flood control capacity can be estimated by linear fitting function.The research findings serve as a reference for the dispatching of cascade hydropower stations in the lower reaches of Jinsha River.
作者
刘亚新
徐杨
马皓宇
卢佳
汪涛
叶德震
LIU Ya-xin;XU Yang;MA Hao-yu;LU Jia;WANG Tao;YE De-zhen(China Yangtze Power Co.,Ltd.,Yichang 443002,Hubei Province,China;Hubei Key Laboratory of Intelligent Yangtze and Hydroelectric Science,Yichang 443002,Hubei Province,China)
出处
《中国农村水利水电》
北大核心
2023年第10期230-239,共10页
China Rural Water and Hydropower
基金
国家重点研发计划项目(2019YFC0409000)。
关键词
金沙江下游梯级电站
梯级电站优化调度
聚类
调度策略
cascade reservoirs in the lower reaches of Jinsha River
optimal dispatching of cascade hydropower stations
clustering
dispatching strategy
