Two-stage operation optimization strategy of park integrated energy system cluster coupled with hydrogen energy storage

In response to the issues of insufficient flexibility in the operation of hydrogen storage and hydrogen production equipment with poor economic viability when operated independently in the park, firstly, a comprehensive energy system model for hydrogen storage and power generation which considering the multi-operational conditions of alkaline electrolyzers (ELE) is constructed. This model is integrated into the comprehensive energy system of the park as a multi-energy supply device. Multiple park comprehensive energy systems are then interconnected to form a park comprehensive energy system cluster through the sharing of electric energy. Subsequently, an operational optimization strategy is proposed to address the issues of electric energy sharing and profit settlement in the park cluster system. This strategy consists of two stages. In the first stage, the alternating direction method of multipliers with dynamic step size (DSS-ADMM) is employed to solve the electric energy transaction volume among parks. In the second stage, based on the operating costs of the park cluster system under different degrees of electric energy sharing, the Shapley value method from cooperative game theory is used to settle park profits. Finally, the results indicate that the operational mode of hydrogen storage which considering the multi-operational conditions of alkaline ELE effectively enhances the flexibility in preparing hydrogen during electrolysis, meeting various energy supply needs within the park. The sharing of electric energy among parks promotes the reduction of park operating costs, resulting in a 6.05 % decrease in the total cost of the park cluster system. Meanwhile, the Shapley value method effectively settles park profits, with individual parks receiving profits of 1652.9583 ¥, 404.2334 ¥, and 734.7739 ¥, respectively.