基于电-热分时间尺度平衡的综合能源系统日前经济调度

Day-ahead economic dispatch of integrated energy system based on electricity and heat balance in different time scales

综合能源系统能够提高能源利用效率、促进可再生能源消纳,已成为能源领域的重点研究方向。如何实现多能源的联合规划、协同运行是综合能源系统运行的重要问题。在热电联供型综合能源系统中,电能可实现实时调度;而热能具有热惯性,其供需可能不满足实时平衡,可依据某一调度时段内的总量平衡进行调度。基于此,提出了考虑电-热分时间尺度平衡的综合能源系统优化模型,寻求最优热调度时间尺度以满足用户舒适度及系统运行经济性双重要求。所提模型中电能为实时平衡,热能为调度时间尺度内的总量平衡,通过电-热分时间尺度平衡提高了机组运行的灵活性。用户舒适度采用国际ISO标准热舒适模型,可更加人性化地反映供热效果。以某省某区域冬季典型日为例进行仿真分析,结果表明所提模型能够得到最优的热调度平衡时间尺度与调度计划,在满足用户舒适度的同时提高了系统的运行经济性。

The IES（Integrated Energy System） can improve energy efficiency and promote renewable energy consumption,and has become a key research focus in the field of energy.How to realize the joint planning and coordinated operation among multiple energy sources is the main problem of IES operation.In the IES combined with heat and power,the electric energy can be dispatched real-timely,while the supply and demand of thermal energy may not meet the real-time balance due to the thermal inertia,which can be dispatched according to the total energy balance in a dispatch interval.Based on this,an optimal operation model of IES is proposed considering the electricity and heat balance in different time scales,which seeks the optimal dispatch time scale of thermal energy to meet the dual requirements of users＇ comfort and system operation economics.In the proposed model,the power balance is realtime and the heat balance is a total balance in the dispatch time scale,by which the operation flexibility of the units is improved.The ISO international standard thermal comfort model is adopted to describe the users＇ comfort,which can reflect the heating effect more humanely.A typical winter day in a region of a province is simulated and analyzed,and results show that,the proposed model can get the optimal dispatch time scale of heat balance and the optimal dispatch plan,improving the operation economy of the system while satisfying the users＇ comfort.