泵站加压式树状供水管网优化设计研究

针对传统供水管网优化设计时未考虑整个管网的首末水头约束问题,提出了以管网系统年折算费用最小为目标函数,以水泵扬程和具有标准管径的干、支管管道长度为决策变量的泵站加压式树状供水管网优化设计数学模型。在该模型中,假定水泵扬程已知,将管网优化问题转化成管网投资线性子模型问题,并采用大系统分解-动态聚合方法对该子模型进行求解。研究结果表明,该方法寻优能力强,且计算时间短,计算结果精度较高,为泵站加压式树状供水管网系统优化设计提供了一种可行而有效的新方法。

Optimization design of pumping tree pipe network

The head and end water head constraints of the network in optimal design of traditional water supply network is not considered, so we put forward a mathematical model for optimizing the pumping tree pipe network with the objective function of lowest annual cost and the decision variables of the pump head, pipe length of standard diameter. In this model, assuming that the pump head is known, the pipe network optimization is transformed into linear sub-model of pipe network investment solution. The large system decomposition-dynamic aggregation method is applied to solve the sub-model. The research result shows that the method is feasible and effective for the optimization of pumping tree pipe network, which has some advantages in good search capability, fast calculation and high accuracy.