Low-carbon Economic Dispatch of Park Integrated Energy System Based on Seasonal Carbon Trading Mechanism

In order to effectively improve the rationality of the allocation of carbon emission quotas and avoid the problem of aggravating environmental pollution caused by excessive carbon emissions during the annual settlement, this paper proposes a seasonal carbon trading mechanism based on reward and punishment factors. Low-carbon economic dispatch is carried out with the park integrated energy system (PIES) as the object. First, an integrated energy system (IES) operation framework including the energy layer, carbon flow layer and management layer is constructed, and a dynamic consistency model of supply and demand of electric-gas-heat multi-energy flow is established. Then, the "daily- seasonal-annual" carbon emission characteristics within the system are estimated. It breaks the quota allocation method of the traditional application index method. The grey relational analysis method is used to establish a carbon emission quota allocation model, and a seasonal carbon trading mechanism is established based on the reward and punishment stepped carbon price. Finally, with the goal of minimizing the operating cost and carbon transaction cost in the whole life cycle of the system, the low-carbon economic dispatch is carried out for the PIES purpose of satisfying the seasonal carbon trading quota. The amount of carbon reduction is also analyzed in the process of long-term seasonal energy storage participating in the scheduling. The PIES of IEEE 33 node power grid with 5-node gas grid and 7-node heat grid is built, and an example analysis is carried out based on multiple scenarios to verify that this dispatch method can realize low-carbon economic operation and ensure the reliability of system energy supply. The result lays a theoretical foundation for the establishment of zero-carbon parks. © 2024 Chin.Soc.for Elec.Eng.