Under the “dual-carbon” strategic goal, in order to improve the economy, a low-carbon and multi-energy coupling of integrated energy system (IES), this paper proposes an optimal scheduling method of the integrated energy system considering low-carbon demand response and multiple utilization of hydrogen energy. Initially, power-to-gas (P2G) is coupled with carbon capture to achieve carbon recovery and reuse. Building upon the conventional P2G framework, this study develops an expanded hydrogen-energy utilization scheme that integrates hydrogen fuel cells, a hydrogen tank, and a gas-fired combined heat and power (CHP) unit operating with hydrogen blending, thereby fully harnessing the latent potential of hydrogen resources. Then, the flexible load response mechanism and the stepped carbon trading mechanism are introduced on the demand side to optimize the electricity-heat load curve and control carbon emissions. Finally, based on a Monte Carlo simulation, the uncertainty is processed to generate the typical scenario curve of new energy output. To minimize the total operating cost of the system, an IES low-carbon economy optimization scheduling model is established, and the proposed model is solved using the CPLEX solver. Through simulation comparison and analysis of the optimization results in various scenarios, the proposed optimization model achieves a total cost reduction of 530.44 yuan and a 20.64% reduction in carbon emissions. It has been verified that the model can achieve environmental protection while considering economic factors, and can effectively promote the low-carbon development of the integrated energy system.
Wang et al. (Thu,) studied this question.