In order to achieve the strategic targets of carbon peak and carbon neutrality in China

it is urgent to explore the low-carbon and efficient utilization of renewable energy. The cogeneration unit challenges the consumption of renewable energy with the working mode of combined heat and power. Therefore

the collaborative operation framework of power-to-gas

carbon capture system

distributed generation and combined heat and power unit is proposed and its coupling characteristics are analyzed. An optimal scheduling model of integrated energy system based on this framework is constructed

and a user demand response model is established. Then

taking the integrated energy system side as the upper optimization model subject

and the user side as the lower optimization model subject

a bi-level optimization model based on master-slave game is proposed

as well as its solution method. The example shows that the model and strategy proposed in this paper can not only effectively improve the consumption of renewable energy

reduce the carbon emissions of cogeneration units

but also reduce the operation cost of the system and the energy purchase cost of users

and improve the energy use efficiency of users and the economic benefit of the system.