College of Electrical Engineering and New Energy, China Three Gorges University
Hubei Provincial Engineering Center for Intelligent Energy Technology, China Three Gorges University
State Grid Quzhou Power Supply Company

文章针对含高比例的可再生能源的区域综合能源系统,综合考虑能量的数量和品质,提出了一种计及火用效率的双层优化方法。首先,建立了区域综合能源系统电、气、热、冷多能耦合的模型,并对系统内涉及的能量和设备进行火用分析,分别计算其能量品质系数和火用效率;然后,建立了兼顾系统容量规划和调度运行的双层协同优化模型,其中上层以火用效率和经济性为优化目标进行容量配置,下层以运行成本最低为目标优化机组出力,从而得到最佳方案;最后,选取某区域综合能源系统进行算例分析。与其他方案相比,文章所提双层优化方法可以为区域综合能源系统提供更好的配置和调度方案,火用效率可以更好地反映能量真实利用水平,实现高质量用能。

For regional integrated energy system containing a high proportion of renewableenergy, "quantity" and "quality" of energy are both discussed under "Exergy" concept and a two-layer optimization method considering exergy efficiency is proposed. Firstly, a model of multi-energy coupling of electricity, gas, heat and cold was established, and exergy analysis of energyand equipment is implemented. Then, a two-layer optimization model is established that considerssystem capacity planning and dispatching operation. The upper layer takes exergy efficiency andeconomy as the optimization goal for capacity allocation, while the lower layer takes the lowestoperating cost as the optimization goal for unit output, therefore the best capacity allocation andoperation scheduling scheme are obtained. Finally, a regional integrated energy system case isselected, and different schemes are analyzed for comparison. The result shows that the two-layeroptimization method proposed in this paper can provide a better planning and scheduling schemefor the regional integrated energy system, while the exergy efficiency can characterize the actuallevel of energy utilization precisely and achieve high-quality energy use.

国家自然科学基金资助项目(52107107);国网湖北省电力公司管理科技项目(5215H0220002)