基于P2G与富氧燃烧联合运行的多能源低碳调度

Low carbon scheduling of multi-energy system based on power to gascombined with oxygen enriched combustion

电转气(power to gas,P2G)技术实现了电能与天然气的相互耦合,在提升多能源系统经济性和降低系统的碳排放方面发挥着重要作用。文中针对P2G过程中电解水产生的氧气未能被充分利用的问题,提出了基于P2G与富氧燃烧联合运行的多能源系统优化调度模型。首先,将P2G过程分为电转氢过程和甲烷化过程,电转氢过程产生的氧气输送给富氧燃烧电厂使用;再将富氧燃烧电厂捕集的CO_(2)与电转氢过程生成的氢气作为甲烷化反应的原料,生成的天然气供给燃气机组使用,从而实现资源的充分利用。其次,将P2G与富氧燃烧电厂联合运行模型引入多能源系统,构建了基于P2G与富氧燃烧电厂联合运行的低碳多能源系统架构。最后,建立以多能源系统运行成本最小为目标的低碳经济调度模型,并通过设置场景对比的方式进行验证。仿真结果表明,所提模型有效降低了系统成本及碳排放量。

Power to gas(P2G)technology realizes the mutual coupling of electric energy and natural gas,and plays an important role in improving the economy of multi-energy system and reducing the carbon emissions of the system.In order to solve the problem that the oxygen produced by electrolyzed water in the process of P2G conversion can not be fully utilized,A multi-energy system optimal scheduling model is proposed based on the joint operation of P2G and oxygen enriched combustion power plants.Firstly,the P2G process is divided into power to hydrogen process and methanation process.The oxygen generated in the power to hydrogen process is delivered to oxygen enriched combustion power plant for use.Then,the CO_(2)captured by the oxygen enriched combustion power plant and the hydrogen generated during the power to hydrogen conversion process are used as the raw materials for the methanation reaction,and the natural gas generated is supplied to the gas turbine unit for use,so as to realize the full utilization of resources.Secondly,the joint operation model of P2G and oxygen enriched combustion power plants is introduced into the multi-energy system,and a low carbon multi-energy system architecture based on the joint P2G and oxygen enriched combustion power plants is built.Finally,a low-carbon economic scheduling model with the goal of minimizing the operating cost of the multi-energy system is established and verified by setting up a scenario comparison.The simulation results show that the proposed model effectively reduces the system cost and carbon emissions.