双碳量约束下风电–碳捕集虚拟电厂低碳经济调度

Low-Carbon Economic Dispatch Based on Virtual Power Plant Made up of Carbon Capture Unit and Wind Power Under Double Carbon Constraint

风电–碳捕集虚拟电厂由出力间歇且波动的风电机组和碳捕集机组聚合而成,可实现内部协同优化,整体参与电网调度。为更准确描述储液式碳捕集机组的捕集流程,将捕集系统正在处理的CO2量的传统单碳量形式,改进为再生塔正在处理的CO2量和吸收塔正在处理的CO2量的新型双碳量形式,并将其计入机组运行约束。以各时段内该虚拟电厂在电力市场与碳交易市场中的净收益最大化为目标,构建了日前–实时双阶段低碳经济调度模型。以日前调度结果作为虚拟电厂申报出力;在实时调度阶段,动态修正碳捕集机组的净输出功率,并辅以储能电池,以克服风电出力变化导致虚拟电厂实际出力偏离其申报值的难题。仿真结果表明,所提双碳量模型合理且正确。虚拟电厂联合运行模式可协调优化其内部各单元的出力安排与碳排放水平,使风电成为可调度资源,从而获得更高的运行收益;相较于虚拟电厂独立运行模式,可较大减少平衡出力偏差所需的储能电池配置容量,并能获得更显著的碳减排效益和更高的经济效益。同样条件下与传统单碳量模型相比,采用改进双碳量模型所需的储能电池配置容量将减少,且更经济和低碳。

The carbon capture unit and wind turbine whose output is intermittent and fluctuating were aggregated into a virtual power plant（VPP） which is optimized internally and collaboratively,and to participate in power dispatch as a whole.In order to describe the capture process of solvent-storaged carbon capture unit more accurately,the amount of CO2 dealing in carbon capture system was modified into the amount of CO2 respectively dealing by stripper and absorber,namely the traditional single carbon be modified into an innovative double carbon,then the double carbon model can be taken as a new unit constraints.To maximize the net profit of the VPP in the electricity market and the carbon trading market,the day-ahead and real-time double-stage low-carbon economic dispatch model was constructed.The day-ahead scheduling results were taken as the declaratory output of the VPP.Under real-time scheduling stage,the net output power of the carbon capture unit was amended real-timely,along with contributions of the energy storage battery,to overcome the problem that the actual output of the VPP deviates from its declared value.Simulation results show that the double carbon model is reasonable and correct.The VPP under joint operation mode can optimize the output arrangement and carbon emission level of its internal units coordinately,so the wind power can become a schedulable resource,resulting in higher operational benefits; Compared with the independent operation mode,the required capacity configuration of the energy storage battery to equilibrate output deviation can be reduced,and the carbon emission reduction benefit and economic benefit can both be more higher.Compared with the traditional single carbon model under the same conditions,when the improved double carbon model is adopted for carbon capture unit,energy storage battery can be reduced,and the VPP is more economical and low-carbon.