Multi-stage planning of integrated energy systems considering external carbon trading

Integrated energy system can realize the coordination and optimization among various energy sources in the system through equipment coupling to meet the safe and efficient load requirements of users. In order to coordinate the low carbon and economic requirements of the integrated energy system in the whole life cycle, this paper proposes a multi-stage planning method for the integrated energy system considering external carbon trading. By analyzing the carbon trading mechanism, taking into account the load requirements of different construction stages of the integrated energy system, and including the external carbon trading cost formed by the carbon emissions of each equipment in different stages of electricity, heating and cooling in the economic cost of different stages, a multi-stage planning model of the integrated energy system considering external carbon trading is established. The results show that the model performs better than the traditional model in terms of economic and low-carbon performance over the whole life cycle of the integrated energy system.