Research On Optimal Operation Of Integrated Energy System Considering Hydrogen Supply Chain

In order to achieve the goal of carbon peak in 2030 and carbon neutrality in 2060,building a new power system with new energy power generation as the main body and developing a new low-carbon transportation system with zero emissions is an important direction for the development of China’s energy system and transportation system.However,the large-scale integration of new energy into the power system increases the uncertainty of system operation and puts forward higher requirements for the flexibility of power system operation.The technology of converting electricity to hydrogen based on new energy generation can not only provide clean hydrogen energy,but also absorb excess new energy resources such as wind and solar energy.At the same time,proton exchange membrane fuel cells,hydrogen fuel vehicles,and other technologies can be utilized to achieve electricity hydrogen coupling,expand hydrogen energy utilization scenarios,significantly improve the operational stability of new energy power systems,and achieve integration between energy systems and transportation systems,providing new ideas for solving energy development and environmental pollution problems.Based on the above background,this article first constructs a hydrogen supply chain framework for the demand of hydrogen fuel vehicles.Within this framework,the electricity generated by renewable energy sources such as wind and solar can be converted into storable hydrogen through power to hydrogen technology(P2H),and hydrogen can be reused through fuel cell power generation,achieving closed-loop utilization of electricity hydrogen;In addition,the electricity generated by renewable energy generation and the hydrogen energy produced by converting electricity to hydrogen can be jointly supplied to electric vehicles and hydrogen fuel vehicles.Next,this article models the entire process of the hydrogen supply chain:based on the physical characteristics of the proton exchange membrane tank,a refined model is established for the power and hydrogen production efficiency of the electric hydrogen conversion device;Establish a basic model for vehicle routing problems based on the transportation characteristics and traffic network structure of long tube trailers;Based on the charging characteristics of different vehicles,establish charging models for electric vehicles and hydrogen fuel vehicles,and obtain the electric hydrogen load curve,providing theoretical basis and model foundation for further research in the future.Secondly,in the electric hydrogen coupling system,this article is based on the basic framework of the wind solar hydrogen integrated energy system,improving the wind solar output model and hydrogen storage element model.At the same time,it proposes the electric hydrogen coupling method based on hydrogen fuel vehicles and the electric hydrogen coupling method based on proton exchange membrane fuel cells.On this basis,this article aims to minimize the total amount of wind and light waste,and compares and analyzes the impact of two electricity hydrogen coupling strategies on the operation of the solar hydrogen integrated energy system through numerical examples,forming the operational characteristics of the solar hydrogen integrated energy system based on electricity hydrogen coupling.Based on the results of the example,analyze the shortcomings of the proposed electric hydrogen coupling strategy in this paper and propose solutions.Furthermore,the research scope is extended to the joint energy and transportation system.Firstly,based on the shortcomings of the previous examples,this paper proposes an integrated electricity hydrogen demand response model for electric vehicles and hydrogen fueled vehicles.By jointly solving the hydrogen supply chain model and the wind hydrogen integrated energy system model,a genetic algorithm is first used to search for the shortest path for hydrogen transport vehicles to transport from the electric to hydrogen plant station to the electric hydrogen integrated charging station.With the goal of minimizing the total operating cost,the IEEE-30 node transmission network and 16 node transportation network are used as examples to solve the optimal operating strategy of the energy transportation joint system described in this article.On this basis,the impact of electricity hydrogen coupling strategy and electricity hydrogen integrated demand response strategy on the operation cost of the joint system is analyzed.