Optimization Planning Of Integrated Energy System Based On Hydrogen Energy Storage

In recent years,comprehensive energy system solutions that enable collaborative management,interactive response,and complementary assistance have been hailed as one of the main technical approaches to solving renewable energy consumption challenges.Hydrogen energy,due to its advantages of zero pollution,high energy density,and easy conversion,is key to achieving efficient operation of comprehensive energy systems.Therefore,based on a comprehensive analysis of the basic components and architecture of the comprehensive energy system,a hydrogen storage-based optimization planning method for comprehensive energy systems is proposed.By introducing hydrogen storage devices,the dual storage and consumption of "electric energy" and "non-electric energy" forms of renewable energy generation can be achieved,improving the renewable energy consumption problem in the comprehensive energy system,enhancing the energy utilization efficiency of the system,and improving the flexibility and controllability of the comprehensive energy system.The main work is summarized as follows:(1)Analysis of the basic components of hydrogen storage systems.A hydrogen storage system model is constructed to analyze the energy flow and conversion relationships within the system.The current hydrogen preparation and storage technologies are studied,and the characteristics of different types of hydrogen preparation and storage technologies are compared.(2)Construction of a hydrogen storage-based optimization planning model for comprehensive energy systems.The basic architecture of the hydrogen storage-based comprehensive energy system is proposed,and the basic laws and characteristics of energy flow and conversion within it are studied.The mathematical models of the major units in the comprehensive energy system are constructed,and the characteristics of each part’s work are analyzed.The mathematical model of the hydrogen storage system is established.Taking the economic optimization of the comprehensive energy system as the objective function,the energy balance of electricity,heat,and fuel supply and demand in the system as the energy constraint,and the power generation equipment,heat production equipment,and hydrogen storage equipment as the equipment constraint conditions,an optimization planning model for the comprehensive energy system is established.(3)A typical daily scenario division method for comprehensive energy systems based on an improved K-means clustering algorithm is proposed.An electric grid data pre-processing model is constructed.The typical daily scenario division index selection method for the comprehensive energy system is proposed,and a multi-index weight assignment model for typical daily scenario division based on entropy weighting method is established.The mathematical model for determining the number of typical daily clusters based on the elbow evaluation index is established.Finally,based on the operating data of a regional power grid containing new energy power plants in northwest China,the mathematical models of each unit are constructed in MATLAB through Yalmip,and the optimization planning model for the comprehensive energy system based on hydrogen storage proposed in this paper is solved using Cplex solver.Simulation results show that the hydrogen storage-based comprehensive energy optimization planning model proposed in this paper can improve the system’s ability to consume renewable energy,ensure reliable supply of electric and heat loads,and reduce the system’s carbon emissions.