共查询到19条相似文献,搜索用时 562 毫秒
1.
利用实测的给水管网总供水量和少量测压点水压数据,实时模拟管网所有节点水压和节点流量.在此基础上对管网运行压力分布作出评判,再进行优化调度,确立了运行工况实时模拟基础上的管网优化调度模式.建立了运行工况实时模拟基础上的管网优化调度模型,采用顺路返回枚举算法求解优化调度模型.编制了给水管网优化调度计算程序,对示例管网进行了优化调度计算,得出了优化调度方案.优化调度计算稳定,计算速度较快,能满足给水管网实时优化调度的需要. 相似文献
2.
3.
介绍了城市给水系统优化调度的主要内容。用水量预测研究和给水管网数学模型研究是优化调度的基础。用水量预测模型是在分析城市用水量序列数据模式的基础上,综合利用统计回归的方法建立的数学表达式。给水管网数学模型是建立水厂出厂压力和流量与管网测压点之间的经验数学表达式,它反映了给水系统的运行工况。优化调度模型的建立和求解是优化调度的核心。 相似文献
4.
5.
6.
7.
8.
给水管网优化设计和运行管理问题的提出自上世纪60年代,国内外给水管网科学和工程工作者已做了大量的研究和探索工作,取得了丰硕的成果。给水管网优化技术研究重点一直是管网设计和运行优化算法,已成为给水管网优化理论和技术的核心。然而,给水管网优化的基础——给水管网设计与运行现状评价体系的研究和应用,目前在国内外尚处于起步阶段。应用价值工程方法进行给水管网设计与运行现状评价,可以为给水管网优化设计和运行奠定新的科学基础,有效地提高给水管网设计和运行的科学性和工程效益。 相似文献
9.
给水管网优化技术研究重点一直是管网设计和运行优化算法,已成为给水管网优化理论和技术的核心。然而,给水管网优化的基础——给水管网运行现状评价体系的研究和应用,目前在国内外尚处于起步阶段。应用价值工程方法进行给水管网运行现状评价,可以为给水管网优化运行奠定新的科学基础,有效地提高给水管网运行的科学性和工程效益。 相似文献
10.
建立上海市计算机给水管网动态水力模型研究 总被引:10,自引:0,他引:10
计算机给水管网动态水力模型能为给水管网的规划、设计、优化控制和科学管理提供可靠的信息来源;本文阐述了建立上海市计算机给水管网动态水力模型的研究方法,实践证明是成功的,具有重大的实践意义。 相似文献
11.
12.
为了分析城市给水管网系统模型的不确定性,介绍了多种不确定性分析理论的应用与发展。从管网系统的复杂性入手,分析了管网系统不确定性产生的原因,从模型参数和模型结构两方面分析了管网系统模型的不确定性。介绍了GLUE、BaRE、MCMC和FOSM等不确定性分析方法的理论与进展,认为模型的不确定性分析是模型开发中必不可少的程序。 相似文献
13.
14.
Dennis P. Lettenmaier 《Civil Engineering and Environmental Systems》2013,30(1):15-22
Accurate estimation of water supply reliability is often hindered by a paucity of historic streamflow data and the expense of adequate system modelling. A procedure using synthetic streamflow generation and screening models in determining water supply reliability in a cost-effective manner is presented. A series of screening models are developed to evaluate numerous synthetic streamflow data to select from them desired flows for incorporation into an optimization model. Results from the optimization model are used to generate cumulative distribution functions of system reliability. The water supply system serving Seattle, Washington is used as a case study. 相似文献
15.
16.
17.
《Urban Water Journal》2013,10(1):3-15
This paper considers the minimization of the cost of water through an integrated water resources planning and management model, implemented within the decision support system for the management of the Athens water supply system. The mathematical framework employs a simulation-optimization scheme, where simulation is applied to faithfully represent the system operation, whereas optimization is applied to derive the optimal management policy, which simultaneously minimizes the risk and cost of decision-making. Real economic criteria in addition to artificial costs are appropriately assigned to preserve the physical constraints and water use priorities, ensuring also the lowest-cost transportation of water from sources to the point of consumption. The proposed model is tested on the hydrosystem of Athens, in order to minimize the expected operational costs for several system configurations. 相似文献
18.
供水管网内源污染和外源污染协同监测下的水质监测点优化选址一直是供水领域的研究难点。为进一步提升监测点选址的科学合理性,采用模糊数学集法分析管网区域污染物、管道完整度以及管网低负压情况,量化确定管网的风险评估指数。将基于风险评估的节点监测用时期望值纳入监测点优化选址模型,结合监测失效率、水量覆盖度和监测点占比这3个优化目标,完善选址优化体系并建立多目标优化选址模型。使用MATLAB软件搭载基于参考向量的非支配排序多目标遗传算法(NSGA-Ⅲ)成功求解该多目标优化模型,得到帕累托(Pareto)前沿解集。最后,基于Modena算例管网进行研究,与传统复合监测目标优化模型选取的选址方案进行对比发现,基于风险评估的供水管网优化选址模型选取的方案能有效降低监测用时,提高了监测效率。 相似文献
19.
This paper presents an optimization model for water quantity and quality integrated management of an urban lake in a water deficient city. A representative water quantity and quality safeguard system served urban lake, including multi-source water supply facilities, recirculating water purification facilities and surplus water discharge facilities, is widely used in Chinese water deficient cities. Because it is complicated, any mismanagement will result in water quality deterioration, water waste and high operation cost. The presented model attempts to achieve the objectives of controlling water pollution, reducing economic cost and improving water utilization efficiency through an optimized operating water safeguard system. The model is applied to Qingjing Lake in Tianjin, China. Results show that the model plays a more positive role for water quantity and quality integrated management. 相似文献