Study On Economic Operation And Optimal Allocation Of Integrated Energy System Considering Multi-energy Storage

At present,the increasing proportion of clean energy access greatly interferes with the original operation mode of the energy system,which is a great challenge for the safe,stable and efficient operation of the energy system,and optimizing the operation has become the main problem to be solved urgently in the integrated energy system.Many kinds of energy storage technology can realize the translation of energy in time,the transformation of energy form which is not easy to store to energy form which is easy to store,which can not only fill the shortage of energy supply,but also guarantee the stable and reliable supply of energy.As a result,the development of multi-energy,centralized and optimized control of energy systems is also farreaching to deepen the reform of the energy structure.Therefore,on the basis of considering the multi-energy Federal Reserve,this paper makes an in-depth study on the economic operation and internal flexibility of the integrated energy system.First of all,based on the basic architecture and operation characteristics of integrated energy system,this paper analyzes the application scenarios,operation conditions of different forms of energy storage,and realizes the important role of the target and the translation and optimization matching for the economic operation of the system,the realization of the energy supply and demand curve.On this basis,the different configuration requirements of the system for various energy storage technologies are summarized.Considering all kinds of energy requirements,the system components are divided into two parts: energy conversion and energy storage.And then guide the follow-up integrated energy system optimization planning,flexible resources coordinated allocation work.Then,on the basis of considering the characteristic difference of different energy forms within the integrated energy system,the optimization goal is to minimize the cost of multienergy integrated operation and maximize the consumption of abandoned wind.By comparing the effects of single energy storage form and multi-type combined energy storage configuration form on the system operation,the paper makes clear its role in improving the current wind power absorption level and its contribution to improving the integrated energy system operation cost and overall flexibility.Finally,under the condition of high permeability and grid-connected renewable energy,based on the development trend of flexibility balance of system's "source-net-load-storage",the definition,characteristics and general mathematical form of supply-demand balance mechanism of system flexibility are studied in depth.At the same time,the quantitative index of flexibility is introduced into the energy system planning,aiming at the contradiction between the supply and demand of the flexibility of the system in the heating period,quantitative analysis is carried out on the flexible supply capacity of different regulating resources,optimization and coordination of all kinds of flexible regulating resources are optimized,and the optimal allocation scheme under different flexibility constraint threshold is obtained,and then the grid connection of high proportion renewable energy is realized.