全能流视角下的城市能源规划方法

基于图论思想,提出了一种可较好地解决多源多汇多路径的城市能源系统的规划方法。建立了汉密尔顿有向图来描述城市能源网络供需间的能量流动过程,构建了以节点、路径、网络平衡为要素的通用模型,以矩阵的形式表示能源网络的节点性能和拓扑结构。并且将能流路径所对应的权重作为目标函数,分析比较不同路径匹配的系统性能。之后,利用此方法对联产系统的节能情景进行评估,对不同情景下联产系统的路径匹配特性进行说明。其结论可为城区建设和旧城改造过程中的分布式能源系统推广和城市能源系统规划提供参考。

A novel method for urban energy planning based on the graph theory

In this work, a new method to plan and optimize pathways mix of urban energy system is proposed. The Hamilton graphs and digraph describing an urban energy conversion process from supply to demand. Basing on it, a general model with nodes, paths and network balance as the elements is established, and then the objective function corresponding to the energy conversion paths is assigned as the weight, in order to make a comparison of system performance of different paths mix. Furthermore, the energy conservation scenario of cogeneration system is evaluated by using the developed mathematical model, the results reveal the energy saving characteristics and applicable conditions under different built environment, further illustrating the coordinated operation and optimal dispatch strategies of distributed energy system in urban energy network. It is indicated that the proposed methodology have the ability to ameliorate energy network at the process of new-built planning and built areas reconstruction.