Power to gas (P2G) technology converts electricity energy into natural gas

playing an important role in achieving a low-carbon economic dispatch in an integrated energy system. To solve the problem of underutilized oxygen in the P2G process and further reduce carbon emissions

a low-carbon integrated energy system that considers P2G oxygen-enriched improvement and combined solar energy utilization

handling carbon reduction from the following aspects is proposed. Firstly

the oxygen produced by P2G is mixed with CO2 as an assistant combustion gas

and P2G utilizes captured CO2 to produce natural gas for gas-fired units. Secondly

because the boiler efficiency is affected by the oxygen concentration

the optimal oxygen supply state for each period of the oxygen-consuming equipment is determined by a combined algorithm of genetic algorithm and Gurobi solver. Finally

the solar energy efficiency is improved by using mixed solar energy to reduce the use of fossil energy. By introducing oxygen-enriched and combined solar energy into the integrated energy system

a low-carbon economic operation model of the integrated energy system is constructed

and scenarios are set for comparison and verification. The simulation results show that the CO2 emissions are reduced by 75.83% compared to the oxygen-enriched improvement before

and the total solar energy output is increased by 9.79% compared to the scenario without combined solar energy

indicating that the proposed model can effectively reduce carbon emissions and operating costs.