阶梯碳下考虑耦合电转气-碳捕集和热电联产灵活输出的综合能源系统优化调度

Optimal Scheduling of Integrated Energy Systems Considering Coupled Power to Gas,Carbon Capture System,and Combined Heating and Power Flexible Outputs Under Stepped Carbon

“双碳”目标下,为进一步降低综合能源系统(integrated energy system,IES)碳排放,提升可再生能源消纳能力,提出一种IES低碳经济运行优化策略。首先引入阶梯型碳交易机制约束IES的碳排放;然后建立耦合电转气(power to gas,P2G)和碳捕集系统(carbon capture system,CCS)模型,并细化P2G两阶段运行;接着在传统热电联产机组(combined heat and power,CHP)中引入卡琳娜循环与电锅炉联合运行,构造热电灵活输出的CHP模型;最后以系统运维成本、碳交易成本、购能成本和弃风弃光成本之和最小为优化目标,构建IES低碳经济调度模型,并设置不同运行场景对比分析。结果表明:IES碳排放减少38.45%,运行总成本降低10.37%,验证了所建模型的低碳性和经济性。

Under the"dual carbon"goal of China,to further reduce the carbon emissions of the integrated energy system(IES)and enhance the accommodation capacity of renewable energy,a low-carbon economic operation optimization strategy for IES was proposed.Firstly,a stair-like carbon trading mechanism was introduced to constrain the carbon emissions of IES;Then the coupled power to gas(P2G)and carbon capture system(CCS)model was established,and the two-stage operation of P2G was refined;Next,the Karina cycle and electric boiler were introduced to operate jointly in traditional combined heat and power(CHP)units,and a CHP model with flexible heating and power outputs was constructed;Finally,with the optimization goal of minimizing the sum of system operation and maintenance costs,carbon trading costs,energy purchase costs,and wind and solar abandonment costs,an IES low-carbon economy scheduling model was constructed,and different operating scenarios were set for comparative analysis.Results show that the carbon emissions of IES are reduced by 38.45%,and the total operating cost is reduced by 10.37%,verifying the low-carbon and economic performance of the established model.