考虑电转气和可平移负荷的区域综合能源系统优化运行

Optimized Operation of Regional Integrated Energy System Considering Power-to-Gas and Shiftable Load

针对可再生能源发电的消纳以及冷热电负荷需求不匹配问题,文章在原有区域综合能源系统(regional integrated energy system,RIES)的基础上,引入电转气(power to gas,P2G)技术,同时结合综合能源系统内不同种类可平移负荷的用能特性,建立了各类可平移负荷模型,对冷热电负荷平移,利用内点法求解可平移负荷模型,建立涵盖经济、能源及环境等多方面的多目标系统运行优化模型,采用粒子群优化算法获得Pareto非劣解集,并利用模糊理论获得折中解。在算例中设置多种场景,仿真分析考虑负荷平移和电转气技术的区域综合能源系统在降低系统运行成本、削峰填谷等方面的优势,从而验证所搭建模型的有效性。

Aimed at the problem of the accommodation of renewable energy power and the mismatch of cooling,heat and electric load demand,this paper introduces power to gas(P2 G)technology into the original regional integrated energy system(IES),and combines the electric characteristics of various types of shiftable loads in the IES,a model of shiftable load is established,and the translation of cooling,heating,and electric loads is performed using the interior point to solve the model of shiftable load.A multi-objective system optimization operation model covering economics,energy and environment is established.The particle swarm optimization algorithm is used to obtain Pareto non-inferior solution sets,and a fuzzy theory is used to obtain a compromise solution.A variety of scenarios are set up in the calculation example,and the simulation analysis considers the advantages of the regional IES in terms of load shifting and power-to-gas technology in peak regulation,reducing operating costs,etc.,thereby the effectiveness of the proposed model and optimization results is verified.