综合能源系统运行优化设计与运行策略研究

Research on Operation Optimization Design and Operation Strategy of Integrated Energy System

综合能源系统能整合协调各异质能源,是提高能源利用率和降低运行费用的有效途径。提出了两种运行策略及一种基于穷举法的优化策略方法,建立了包括小型燃气轮机系统、地源热泵、电制冷机、吸收式制冷机、换热器的综合能源系统能量转换模型。在案例研究中,提出了以典型日费用最小为目标的综合能源系统优化方案,对以电定热、以热定电两种运行策略下的场景进行了优化分析,确定设备的最佳容量和运行参数,给出了运行策略对比分析结果。结果表明:以电定热策略的整体经济性优于以热定电策略约10%;与传统供能系统在经济性上的适用性进行对比发现,综合能源系统成本节省比例在5%~30%之间。

Integrated energy system can integrate and coordinate various heterogeneous energy sources,which is an effective way to improve energy utilization rate and reduce operating cost.Two operation strategies and an optimization strategy method based on the exhaustive method are proposed,and an energy conversion model of integrated energy system including small gas turbine system,ground source heat pump,electric chiller,absorption chiller and heat exchanger is established.In the case study,a integrated energy system optimization scheme aiming at the minimum of typical daily cost is proposed,and the scenarios under two operation strategies of "determining heat by electricity" and "determining electricity by heat" are optimized and analyzed to determine the optimal capacity and operation parameters of equipment,and the comparative analysis results of operation strategies are given.The results show that the overall economy of "determining heat by electricity" strategy is about 10% better than that of "determining electricity by heat" strategy.Compared with the economic applicability of traditional energy supply system,it is found that the cost saving ratio of the integrated energy system is between 5% to 30%.