Analysis Of Energy Storage Optimization And Economic Operation Of Typical Charging Station

With the increasing awareness of environmental protection and the increasingly severe crisis of fossil energy,the development and application of electric vehicles have become the focus of the world today,and all countries are actively promoting the development of electric vehicle industry.As a necessary service facility for the development of electric vehicles,the construction of charging stations is also in full swing.This paper studies the optimal configuration and economic operation strategy of optical storage capacity of typical charging stations.The main research contents are as follows:(1)The charging load characteristics of electric vehicles are analyzed.Aiming at the types of electric vehicles with high and low charging time urgency,by considering the influence of charging queuing,the charging queuing method based on the idea of timely charging and TOPSIS is studied.Based on the characteristics of electric vehicle charging load and charging queuing method,the daily electric vehicle charging load is statistically superimposed,and the daily monitoring load and night lighting load are taken into account to establish the daily load model of charging station.(2)Analyze the characteristics of different types of energy storage systems and the energy storage configuration requirements of charging stations,and select appropriate energy storage batteries as the energy storage configuration types of charging stations.The charge-discharge model of energy storage system is established,and the influence of cycle life on energy storage configuration cost is taken into account,and the calculation method of cycle life is studied.(3)Based on the annual investment cost of the charging station,the annual maintenance cost of the charging station and the annual power purchase cost of the charging station,an optimal configuration model of the photovoltaic and energy storage capacity of the typical charging station is established,which aims at the lowest annual operation cost of the charging station and takes the constraints of energy balance,energy storage system power,electricity and capacity,photovoltaic equipment capacity and light rejection as constraints.By analyzing the optimal allocation scheme of photovoltaic and energy capacity under different light rejection rates,the economic and appropriate photovoltaic and energy storage capacity is selected as the basis for the economic operation analysis of subsequent charging stations.(4)In the actual operation of the charging station,the uncertainty of photovoltaic output and charging load is considered.In order to maximize the daily operating income of charging stations,a charging station economic operation strategy is proposed to meet the economic optimal demand of different scenarios,and simulation verification is carried out in different scenarios.The results show that the economic optimal operation strategy can adapt to the economic operation needs of charging stations in different scenarios and maximize the income of charging stations.