考虑富氧燃烧碳捕集技术和源荷双侧响应的综合能源系统优化调度

Integrated Energy System Optimal Dispatch Considering Oxy-Fuel Combustion Carbon Capture Technology and Source-Load Bilateral Response

为降低燃气轮机的碳排放水平和提高灵活性,提出了计及富氧燃烧碳捕集技术和源荷双侧响应的综合能源系统低碳经济优化策略。首先,研究了富氧燃烧技术的运行原理及其能流特性,并构建空分制氧设备和碳捕集设备的耦合模型;其次,引入可调的热电比作为供给侧响应策略,需求侧对于电力、热能以及气负荷的特性进行综合权衡,借助能源价格的引导,并考虑其相互之间的可替代属性形成需求侧响应机制;最后,通过计及气负荷碳排放的阶梯式碳交易约束碳排放,以系统运行成本为目标优化各时段机组出力。设置多场景进行仿真分析,结果表明富氧燃烧碳捕集技术能够有效减少系统的碳排放量,源荷双侧响应能够灵活调节供给侧与需求侧的供能关系,并有效减少系统运行成本。

In order to reduce the carbon emission level of gas turbines and improve their flexibility,this paper proposes a low-carbon economic optimization strategy for the integrated energy system that takes into account oxy-fuel combustion carbon capture technology and source-load bilateral response.Firstly,the operating principle and energy flow characteristics of oxy-fuel combustion technology were studied,and a coupling model of air separation oxygen production equipment and carbon capture equipment was constructed.Secondly,the adjustable heat-to-power ratio was introduced as a supply-side response strategy,and a comprehensive trade-off was made for the demand-side between the characteristics of electricity,heat energy and gas load,and a demand-side response mechanism was formed with the guidance of energy prices and considering their substitutable attributes with each other.Finally,through constraining the carbon emissions by tiered carbon trading with consideration of carbon emissions of gas load,the units output in each period was optimized with the system operating cost as the objective.Multiple scenarios were set up for simulation analysis,and the results show that the oxy-fuel combustion carbon capture technology can effectively reduce the carbon emissions of the system,and the source-load bilateral response can flexibly adjust the energy supply relationship between the supply side and the demand side,and effectively reduce the operating cost of the system.