Research On Optimal Scheduling Of Electricity And Vehicle Considering Power To Hydrogen

To achieve the goal of carbon neutrality by 2060,the construction of a renewable energy dominated power system and the development of a zero carbon emission-transportation system are important measures.However,the large-scale integration of renewable energy into the power system increases the uncertainty of system operation and the flexibility of the power system is required to be improved.The scheme of producing hydrogen through renewable energy can not only provide clean hydrogen energy,but also absorb surplus renewable energy.Additionally,Electricity-hydrogen coupling can be realized through Fuel-Cell Hybrid Electric Vehicles(FCHEV),which significantly improves the operational flexibility of new energy power systems and realizes the integration between energy systems and transportation systems.Firstly,an electricity-hydrogen coupling system framework isproposed in this paper.Within this framework:the electrical energy generated by renewable energy can be converted into storable hydrogen through power-to-hydrogen(P2H)technology,and the hydrogen can be used by a hydrogen-burning turbine to generate electricity,realizing the closed-loop conversion of electricity to hydrogen.Additionally,the electric energy produced by renewable energy generation and the hydrogen produced by the conversion of P2H can be used together by FCHEV.Based on this framework,the electricity-hydrogen coupling element is modeled.According to the characteristics of the proton exchange membrane,a non-linear refined model of the power consumption and the hydrogen production flow of the electro-hydrogen device is established.According to the flexible charging characteristics of FCHEV that can be charged and refueled,the FCHEV mileage model and the electric-hydrogen integrated charging station model are established.In the electric-hydrogen coupling system,an optimal scheduling strategy for the power system considering the P2H and gas turbines is proposed.During the valleylow load period,the P2H converts surplus wind power into hydrogen,which provides downward flexibility for the power system.During the peak load period,gas turbines burn hydrogen to generate electricity,which provides upward flexibility for the power system.On this basis,a renewable energy power system optimization scheduling model that takes into account the P2H conversion is established.In this model,the optimization goal is to minimize the sum of power generation cost,start-up and shutdown cost,and flexible adjustment cost,and introduce the electricity-hydrogen coupling constraints of P2H and gas turbines.The effectiveness of the proposed model is verified by case studies,and the impact of the conversion of P2H on the improvement of the flexibility and economy of the power system is analyzed.Furthermore,the research scope is expanded to the energy and transportation system,and the electric-vehicle interconnection optimization dispatching strategy considering the P2H and FCHEV is proposed.Firstly,the advantages of FCHEV compared with traditional electric vehicles in the energy and transportation system scheduling is analyzed.Utilizing FCHEV’s flexible charging characteristics,reasonable scheduling of the charging amount and hydrogenation capacity of the vehicle during the charging period,not only the mileage of the vehicle can be guaranteed,but also the pressure on the operation of the power grid can be relieved.The Dijkstra algorithm is used to search for the shortest route for hydrogen transportation from the P2H plant station to the electricity-hydrogen integrated charging station.Based on this,an optimal scheduling model for the electric-vehicle integrated system is proposed in this paper,which aims to minimize the operating cost of the power system and the cost of the hydrogen supply chain.The IEEE-30 bus transmission grid and the 16-node transportation network are used to compare and analyze the influence of traditional electric vehicles,interactive electric vehicles and FCHEVs in the energy and transportation system The research results show that reasonable scheduling of the charging power and hydrogenation energy during the FCHEV charging period can reduce the operating cost of the energy transportation system.The coordinated scheduling of renewable energy power to hydrogen and FCHEV charging can effectively improve the flexibility of the power system.