Abstract: As the result of the ever-increasing penetration of new energy sources, particularly in order to facilitate the achievement of the dual carbon goals, it is of great importance to address the issue of seasonal fluctuations in the medium and long-term planning of new integrated energy systems. Firstly, this paper proposes a framework of multi-energy coupled integrated energy system considering both carbon flow and hydrogen energy. Choosing hydrogen-burning turbines instead of fuel cells as the hydrogen-electric coupling method, this paper investigates the process of hydrogen production-storage-use as seasonal energy storage. Secondly, in order to control the annual carbon emissions of the system, a futures-based carbon trading mechanism adapted to the annual planning of the system is proposed. This paper establishes an annual planning model for integrated energy systems in which the system modification cost, operation cost, carbon cost and penalty cost are set as the objective functions. The model is then solved using an improved differential evolutionary algorithm. Finally, the specific case study demonstrates that seasonal hydrogen storage can effectively smooth out the seasonal peak-to-valley difference of the net load curve. By virtue of the futures carbon trading mechanism, the system carbon trading cost can be reduced without exceeding the limit of the annual carbon emission of the system. The results of the algorithm can provide valuable reference for the annual planning of the new integrated energy system in the future.

Key words: seasonal energy storage, hydrogen storage, hydrogen-burning turbines, futures carbon trading, integrated energy