Under the background of “double carbon”target

in order to improve the energy utilization efficiency of integrated energy system ( IES ) and further limit the carbon dioxide emissions in the system to make it operate in a low-carbon economy

an IES optimal scheduling model considering reward-penalty ladder carbon trading is proposed. Firstly

the energy time-shift characteristics of the carbon capture system under the integrated flexible operation mode are used to model it to absorb excess wind power and reduce carbon emissions. Secondly

a two-stage power-to-gas model is established to further absorb wind power and provide natural gas and hydrogen supply loads. Finally

the carbon emissions of the system are measured based on the life cycle assessment method

combined with the reward and punishment ladder carbon trading mechanism

a low-carbon economic dispatch model with the lowest comprehensive operating cost as the objective function is used to simulate multiple scenarios to verify the effectiveness of the proposed model. The simulation results show that the proposed model can effectively reduce carbon emissions

abandoned air volume and comprehensive operating costs.