Optimal Operation Of Integrated Energy System Based On Compressed Air Energy Storage

In order to cope with the escalating energy crisis and environmental problems,countries all over the world have adopted the development policy of improving energy utilization rate and vigorously developing clean energy.China has also announced two strategic goals of "carbon peak" and "carbon neutralization".How to promote the transformation of modern energy system to a more low-carbon,efficient,clean and safe direction,the integrated energy system which organically integrates a variety of energy supply,storage and energy conversion equipment provides a new solution.The integrated energy system,which cooperatively dispatch multiple energy flows in all aspects of source,load,network and storage,not only has high efficiency and flexible operation mode,but also can efficiently absorb distributed renewable energy.In order to ensure the energy supply quality of the integrated energy system and further improve the wind and light absorption rate,it is necessary to reasonably plan the energy storage equipment in the system.Compressed air energy storage not only has long working life,large energy storage capacity and low pollution emission,but also has multiple interfaces of cold,heat and electricity,which can be deeply integrated with integrated energy system.This thesis focuses on the integrated energy system with compressed air energy storage.Firstly,the integrated energy system is taken as the research object,in which the adiabatic compressed air energy storage system is introduced,and the advanced technologies such as electric vehicle centralized charging and discharging,electrolytic hydrogen production,photo thermal power station are used;the energy transfer and coupling relationship among the components in the integrated energy system are reasonably planned;the operation mechanism of each component is analyzed,and the mathematical model is accurately established to fully consider the energy transfer The characteristics of heat storage,schedulable potential of charging station,hydrogen storage of hydrogen energy unit,compressed air multi energy cogeneration,etc.Secondly,based on the component model and system structure,the day ahead optimal scheduling model of the integrated energy system is established.The objective function is the optimal economy,and the solution method is mixed integer programming.At the same time,the constraint conditions to ensure the energy balance of the system and the reasonable operation of the equipment are given.Taking the actual data of a certain place as an example,the operation plan of each energy supply,energy storage and energy user is optimized in winter and summer.In the end,the thesis studies the energy transaction among various entities in the integrated energy system,constructs the regional level information energy interaction model of the integrated energy system,which includes energy system operators,compressed air energy storage providers,traditional energy suppliers,renewable energy suppliers and load aggregators,analyzes the market attributes and profit models of different participants,and the game framework is designed that the energy system operators lead the transaction,and other storage,load and source side providers follow the response.For different optimization problems in the three stages of the game,mixed integer programming and multi universe intelligent algorithm are adopted respectively.The optimization results of simulation examples show that each market agent can achieve good interaction and win-win cooperation.