Research On Control Strategy And Capacity Optimization Of Hybrid Energy Storage System

The large-scale application of new energy system is cannot do without the microgrid,and intermittent and stability of new energy are the factors restricting its development in power generation system,therefore the use of micro grid energy storage device to frequency fluctuations on the power output in the microgrid to stabilize.Therefore,at present,the research of energy storage device is more and more,this paper studies the energy storage system from the following aspects:Firstly,we introduce the background and significance of the energy storage system,the storage can answer this important question that its function in micro grid system,and the research status of energy storage system is expounded from the view of key technologies,this paper introduces the classification of the energy storage device,found from the current research status and the existing the problem,put forward the innovation of this paper;Secondly,introduces the theory of ADRC technology,starting from the traditional PID controller,this paper analyzes some defects of the traditional PID controller,which leads to the ADRC;secondly,according to the parameters of ADRC over the defect,and then puts forward the linear ADRC;finally.For the convergence and its frequency characteristics analysis of a two order LESO using mathematical equations;Again,put forward the control strategy of ADRC technique based on linear energy converter,analyzed the basic topological structure of energy storage devices,and the use of mathematical formula,the basic working principle of grid converter;on this basis,coordinate and dq0 coordinate,derived the mathematical model of energy storage system respectively in abc static;in the design of link controller,including the inner loop and the outer ring of the energy storage system control,focus on the analysis of the inner loop,the ADRC advantage on storage controller design and parameters of the system integration in the final verified by linear;the controller has good dynamic characteristics by comparing the simulation results;Finally,the problem of capacity optimization of hybrid energy storage system,from a functional perspective,the reservoir can be divided into energy storage and power storage part two,but every kinds of storage modes have their own advantages and disadvantages,thus combining the advantages of two kinds of storage modes,this paper we propose hybrid storage of lithium battery and super capacitor energy system,analyzes the Ragone curve of the energy storage element analysis,put forward the optimization method of hybrid energy storage system and verified by examples,optimal allocation method from the economic perspective to verify the proposed based on genetic algorithm.