Low-Carbon Cooperative Operation of Integrated Energy Systems Considering Joint Green Certificate and Carbon Emission Trading

Carbon emission trading and green certificate trading mechanisms constitute the cornerstone of low-carbon transitions in integrated energy systems (IESs). However, independent operation of these mechanisms creates coordination barriers that limit their synergistic emission reduction and economic potential. To address this problem, this paper propose a novel low-carbon cooperative operation model based on a green certificate and carbon emission trading mechanism. First, to maximize the environmental value benefits of the system, a dual-market linkage mechanism is constructed, which is mediated by the carbon reduction attributes of green certificates. Second, a multi-operator cooperative alliance is established based on cooperative game theory, and the Shapley value method is employed to rationally allocate cooperative surplus, thereby enhancing the multi-energy complementarity of the IES. Case analysis indicates that under this strategy, the system’s carbon emissions intensity decreased by 30%, while the alliance’s overall operating revenue increased by 22.6%, achieving low-carbon economic operation of IES.