Capacity Optimization Allocation Method Of Low-Carbon Electro-Thermal Hydrogen Park Integrated Energy System Considering Optimal Construction Time Sequence

With the increasing attention to the global energy crisis and environmental pollution,the integrated energy system has gradually become one of the important ways to realize the energy transformation.In the context of the rapid development of the hydrogen energy industry,the proportion of hydrogen energy in the energy system has gradually increased,and the conversion between various energy sources has become more complex,which poses challenges to the planning and construction of the park’s comprehensive energy system.In order to solve this problem,this thesis studies the introduction of optimal construction timing into the comprehensive energy planning model of the park,and analyzes the impact of load demand uncertainty on energy planning,and proposes a hydrogen-containing integrated energy system planning model.The specific research contents are as follows.First,the background and research status of the integrated energy system are introduced,the research significance of the subject is clarified,the mathematical models of the power system,hydrogen system and energy coupling components are established,and the multi-stage planning method and uncertainty analysis method are briefly introduced.Secondly,considering the operation state of multi-energy coordination,a bi-level programming optimization model is established.The upper layer formulates the optimal configuration plan of the park integrated energy system and transmits it to the lower layer.The lower layer obtains the optimal operation strategy of the park’s comprehensive energy system according to the configuration plan of the upper layer and feeds back the total operation and maintenance cost to the upper layer.Considering the coupling relationship between the upper and lower models,the two-layer model is transformed into a solvable single-layer Mixed Integer Linear Programming(MILP)model by using the Karush-Kuhn-Tucker(KKT)condition and the Big-M method.The proposed model and solution method are verified by a comprehensive case study.The simulation results show that the model proposed in this thesis can reduce the operating cost and carbon emissions of the integrated energy system within the planning scope,and provide a reference for the multi-stage planning of the integrated energy system.Finally,aiming at the problem of load uncertainty in long-term planning,based on the original model,the robust optimization method is used to model the uncertainty of electric load,heat load and electric heat transferable load.A two-stage robust programming model of electricity-heat-hydrogen integrated energy system considering multi-stage planning and load uncertainty is established,and the column-and-constraint generation(CCG)method is used to complete the solution.Through the comparison of different cases,the influence of uncertainty adjustment parameters on the planning scheme is analyzed,and the effectiveness of the planning method proposed in this thesis is verified.The park integrated energy system capacity configuration model established in this thesis considering the optimal construction time sequence can provide theoretical reference for the long-term planning and implementation of the system,and provide low-carbon and economical auxiliary decision-making support for the park comprehensive energy system capacity configuration scheme.