梯级泵站输水系统旬优化调度及经济运行研究

Study on the 10-day Optimized Dispatching and Economic Operation of Cascade Pumping Stations in Water Conveyance System

南水北调来水调入密云水库调蓄工程是北京南水北调配套工程的重要组成部分,该工程后半段从怀柔水库通过3级泵站提升输水至密云水库。为实现该工程高效经济运行,基于北京市分时电价,以怀柔水库至密云水库梯级泵站输水系统运行单位输水成本最小为目标,考虑怀柔水库蓄水量、输水线路水头损失、流量平衡和总扬程等约束条件,采用大系统分解协调模型求解该工程旬内优化调度及经济运行问题。将该大系统分解协调模型分解为梯级泵站扬程优化分配模型和旬优化调度模型2个子系统,采用动态规划法实现各子系统的优化,从而实现大系统的全局优化。应用情况表明:模型具有较好的适用性,可为工程优化调度提供依据,指导工程高效经济运行。

The South-to-North Water Diversion into Miyun Reservoir Storage Project is the key part of Beijing complete set of South-to-North Water Diversion Project and the latter part of this project transfers water from Huairou Reservoir to the Miyun Reservoir through three pumping stations. In order to achieve the goal of efficient and economical operation of this project,based on Beijing Time of Use rule,taking the minimum unit cost of cascade pumping stations in water conveyance system as the objective,considering Huairou Reservoir storage capacity,water head loss of delivery line,flow balance and total lift as constraint conditions,this paper used the large system decomposition-coordination model to solve the aim of ten-day optimized dispatching and economic operation of this project. The large system was divided into two sub-systems（ cascade pumping optimization allocation model and ten-day optimized dispatching model）,and this paper adopted the Dynamic Programming method to realize optimization of each subsystem and then realized the global optimization of the large system. The model has a strong practicability,which can provide theoretical basis for the efficient and economical operation of this project.