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 CO₂ 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.