Low-Carbon Economic Dispatch of Electric-Thermal Integrated Energy System Considering CCGT-P2HH-CAES and Demand Response

To promote the adoption of wind power and carbon emission reduction for an electric-thermal integrated energy system， this study proposes a low-carbon economic dispatch model and a solution method for the electric-thermal integrated energy system， considering combined cycle gas-steam units， power to hydrogen and heat， compressed air energy storage （CCGT-P2HH-CAES）， and demand response. First， a collaborative operation framework for the CCGT-P2HH-CAES was constructed to fully utilize the charging and discharging potential of CAES and recycled thermal energy of P2HH. Second， a two-stage low-carbon economic dispatch model for an electric-thermal integrated energy system was established. In the first stage， an economic dispatch model was proposed for an electric-heat integrated energy system incorporating CCGT-P2HH-CAES. The carbon emission responsibilities of the demand side were quantified using carbon emission flow theory. The second stage adopted the bilateral Shapley value method to calculate the carbon emissions range on the demand side. It was then optimized to minimize the difference between the carbon emission responsibility costs and demand response benefits. Finally， a solution procedure for the two-stage model was designed. The improved 6-bus power system and 6-node thermal system were investigated in several case studies. The results show that the proposed model and method can achieve economic operation， wind power utilization， and carbon emission reduction in an electric-thermal integrated energy system.