有外调水源的多年调节水库群供水优化调度模型研究

本文以D市跨流域调水水库群为背景,建立了有外调水源的多年调节水库群供水优化调度模型,将调水和供水统一参与优化,对系统进行减规模和降维处理,采用动态规划方法进行全局寻优。提出了多年调节水库年末蓄水目标的概念,其值通过优选合理确定,以此将年调度与多年调节有机结合起来。与常规调度相比,优化调度年平均少调水844?104m3,水库群总弃水减少299?104m3,水库群年末蓄水量大幅提高,枯水段供水量增大,减小了供水破坏深度。对比结果表明,采用优化调度,在充分挖掘本地水资源供水潜力、有效降低供水成本的同时,提高了枯水期供水安全保障程度。

Study on optimal water supply operation model of pluriennial regulation reservoir groups with external water resource

This paper develops an optimal water supply operation model of pluriennial regulation reservoir groups with external water resources, which has been applied in a case study of a reservoir groups water diversion system for one city. By integrating water diversion and water supply into an optimization system, this model reduces the system scale and dimensionality and implements global optimization with a dynamic programming method. We describe a concept of year-end water storage target of pluriennial regulation reservoir and an optimization method for determination of its value, so as to combine the factors of annual operation and pluriennial regulation. Relative to conventional operation, the optimized operation reduces water transfer by a sum of 8.44×106m3 and total waste water by 2.99×106m3. Thus, the storage of reservoir groups is increased substantially at the end of the year, and water supply capacity in low water season also increased, effectively reducing the degree and extent of water supply interruption. Comparison shows that the model and optimization method can improve water supply security in low water season while fully exploiting the potential of water resources and reducing the cost of water supply.