综合能源系统综合需求响应行为研究

Integrated demand response behavior of integrated energy system

面向耦合电、气、冷、热等多种形式能源的综合能源系统,研究柔性负荷、储能和电动汽车等需求侧资源的综合需求响应(IDR),有利于挖掘多能负荷的响应潜力,激发综合能源系统的灵活性,提升能源利用效率。首先以区域电-气互联综合能源系统为基础,构建园区级冷-热-电-气综合能源系统;其次,建立综合能源系统调度模型,通过节点能量平衡方程分析节点能源价格,明确系统调度-能源价格-IDR的传递关系;然后,基于节点能源价格建立考虑柔性负荷、储能、电动汽车为参与主体的IDR模型;最后,通过算例分析柔性负荷、储能、电动汽车的响应情况,基于节点能源价格对不同位置多能用户IDR前后的负荷曲线进行分析。结果表明,充分利用柔性负荷特性不仅可以提升用户效用,还可以有效降低运行成本。

For integrated energy systems that couple multiple forms of energy such as electricity,gas,coldand heat.Integrated demand response(IDR)of demand-side resources such as flexible loads,energy storage,and electric vehicles is conducive to tapping the response potential of multi-energy loads,stimulating integrated energy flexibility of the system and improving energy efficiency.Firstly,based on the regional electric-gas integrated energy system,a park-level cold-heat-electric-gas integrated energy system is constructed.Then,an integrated energy system scheduling model is established.The node energy balance equation is used to analyze the node energy price and clarify the dispatch-energy price-integrated demand response transfer relationship of the system.Based on the nodal energy price,the IDR model considering flexible loads,energy storage and electric vehicles as participants is established.Finally,the flexible load,energy storage,and electric power are analyzed through examples.The response of the electric vehicle is analyzed based on the energy prices of the nodes,and the load curves before and after IDR of the multi-energy users in different locations are analyzed.Ther analysis shows that while improving user utility,making full use of flexible load characteristics can effectively reduce operating costs.