Research On The Economic Optimization Scheduling Of Micro-energy Grid Group Based On Cloud Energy Storage Structure

With the rapid development of regional comprehensive energy,the energy conversion within and between micro energy grids has become increasingly complex.Therefore,promoting high efficiency,flexibility and economy of micro energy grids has become the primary purpose of optimal scheduling of micro energy grids.The CCHP system can meet the demands of cold,heat and electricity at the same time.Its internal energy conversion device and distributed energy storage make the energy deeply coupled,and thus effectively solve the fixed operation mode of "power depends on heat" and the phenomenon of wind and light abandonment in the traditional micro energy grids.However,the low efficiency of distributed energy storage,limited flexibility of charge and discharge,high cost of construction and maintenance,and the neglect of energy interaction between micro energy grids have become the main problems affecting the economic operation of micro energy grids.Therefore,this paper considers the cloud energy storage structure and the energy interaction between micro grids,and studies the economic optimization scheduling problem of micro energy grid group.The main contents include:Firstly,mathematical modeling is carried out for the traditional micro energy grids to determine the complex energy conversion device model,energy conversion principle and process within the micro energy grids.In addition,the concept of cloud energy storage is introduced in the study,the meaning and structure of cloud energy storage are clarified,and the operation mechanism and energy interaction mode of cloud energy storage are given.It provides a theoretical support for the research on swarm optimization scheduling of cloud energy storage structure micro energy grids.Secondly,aiming at the existence of traditional micro energy grid abandon the abandoned poor light and distributed energy storage efficiency problem,put forward the cloud storage structure of micro energy grid frame model,the distributed energy storage structure in traditional micro energy grid by cloud storage,cloud storage cost is taken into account in economic dispatch model and charging and discharging mode,build the cloud storage structure of micro energy grid economic operation optimization function.Yalmip&cplex was used to solve the linear programming of the model.By analyzing the scheduling results of three different scenarios,the economy of the model was verified,and the price sensitivity was analyzed by setting different price fluctuation ranges.Finally,considering the area of micro energy grid energy interaction between micro energy grid group,in order to further improve the economy,including cloud storage is constructed of micro energy grid structure and internal equipment,at the same time take into account the dynamic scheduling of cloud storage capacity,put forward the cloud storage structure of the cold and hot electric installations,micro energy grid group of economic optimization scheduling model,the independent operation of the cloud storage structure of micro energy grid to consider how the energy of interaction between micro energy grid.Through the solver simulation,the scheduling results of each micro energy grid in the cloud energy storage structure micro energy grid group are analyzed,the economy of the two scenarios before and after energy interaction is compared,and the dynamic scheduling results of cloud energy storage capacity are analyzed.It is verified that the micro energy grid group with cloud energy storage structure has superior charging and discharging flexibility and energy absorption capacity.