基于需求响应的电-热-气耦合系统综合直接负荷控制协调优化研究

Study on Integrated DLC Coordination Optimization of Electric-thermal-gas Coupling System Considering Demand Response

传统能源系统运行、规划局限于电、气、热(冷)等单一能源形式系统,无法充分发挥它们之间互补优势和协同效益。对电–热–气多种能源的优化调度研究,可以实现统筹优化配置,提高多种能源互补利用效率;同时直接负荷控制参与多能源的优化调度为多能源协同调度提供新思路。首先构建了一种电–热–气多源耦合系统结构,分析了供给侧多源耦合系统的特性及需求侧直接负荷控制参与多种能源负荷的特性,其次建立了基于多种能源的直接负荷控制参与电–热–气耦合系统的综合经济优化调度模型;然后仿真分析了电–热–气耦合系统多源互补协调优化调度的场景,以及直接负荷控制参与的电热气耦合调度的特性。结果显示:供应侧多种能源的互支持和备用对于保证多能源系统的安全运行具有重要意义;需求侧调度使供需更趋于平衡,综合直接负荷控制对电–热–气耦合系统需求侧的优化,能够降低峰值负荷,增加需求侧的弹性。

Traditional energy system’s operation and planning is limited to single energy systems of electricity, gas, thermal and others, which can not fully utilize their complementary advantages and synergies. Optimization scheduling techniques for multiple energy sources can achieve optimal allocation and improved energy efficiency. At the same time, direct load control(DLC) participation in multi-energy optimal scheduling provides new ideas for multi-energy cooperative dispatch. Based on this, a structure of electric-thermal-gas multi-energy system is constructed. The characteristics of source side multi-energy system and the DLC characteristics on load side involved in various energy loads are analyzed. In addition, a comprehensive optimization scheduling model of DLC participating in electro-thermal-gas coupling system is established. Then, simulation analysis of multi-energy complementarity coordination optimal scheduling for electro-thermal-gas coupling system is performed, and the advantages of DLC participating in the electro-thermal-gas coupling scheduling are analyzed. Results show that mutual support and reserve of various energy sources on supply side have great significance to safe operation of multi-energy systems. Demand side scheduling makes supply and demand more balanced. Integrated DLC can reduce peak load and increase elasticity of demand side by optimizing demand side ofelectric-thermal coupling system. Therefore, the optimization method proposed in this paper improves stability of the electric-thermal-gas coupling system in terms of supply and demand.