Research On Dynamic Programming Of Electrochemical Energy Storage In Regional Integrated Energy System Considering Capacity Deca

In recent years,China’s energy consumption structure has been improving,and the traditional energy supply system has undergone significant changes,posing many challenges to the safe and reliable operation of the power system.In this context,as a new type of energy supply system,the district integrated energy system can realize the coordination and complementarity of multiple energy sources while bridging the supply side and the use side.The configuration of energy storage in the regional integrated energy system can promote new energy consumption and improve energy utilization,but the energy storage system composed of a single lithium battery storage has the problem of capacity decay in the long cycle of planning and construction,and the volatility and randomness of new energy will also aggravate the capacity decay,while the load will also grow year by year in the planning cycle,which cannot meet the load energy demand.In view of the above problems,this paper configures the electrochemical energy storage system composed of lithium batteries and supercapacitors for the regional integrated energy system based on the long-cycle dynamic planning by considering the capacity decay of lithium battery energy storage.The main research contents are as follows:Firstly,the analysis of various types of energy storage technologies,the comparison of the technical characteristics of different energy storage,the selection of the electrochemical energy storage model applicable to the regional integrated energy system,and the modeling of electrochemical energy storage equipment and regional integrated energy system equipment;secondly,the research and analysis of various types of capacity decay prediction methods for lithium batteries,the comparison of the advantages and disadvantages of different capacity decay prediction models,and the selection of the capacity decay prediction model applicable to the regional integrated energy system The method of predicting the capacity decay of lithium battery energy storage in the regional integrated energy system,and by constructing a neural network for predicting the residual capacity of lithium battery and choosing a suitable model correction algorithm for predicting the residual capacity of lithium battery;again,based on the differentiated characteristics of different types of energy storage,analyzing the technical characteristics of different power decomposition methods,choosing a suitable power decomposition method and constructing a power decomposition model to decompose the regional integrated energy system Finally,a dynamic planning model of electrochemical energy storage for regional integrated energy system considering capacity decay is established,and capacity decay prediction results are used to construct capacity compensation coefficients to compensate for capacity in different construction stages of long planning cycles.Three different scenarios are established for simulation analysis,and the results show that the model constructed in this paper improves 2.22% in economy and 8.41% in net load power consumption capacity.