Coordinated Planning Of Electric Vehicle Charging And Replacing Power Station And Distribution System Considering Renewable Energy

With the aggravation of the energy crisis and the intensification of environmental conflicts,governments of all countries actively advocate the implementation of the theme of clean and green energy,and electric vehicles,as a key industry for future energy consumption,actively respond to the call.Therefore,electric vehicles have developed rapidly around the world,and the number of vehicles has increased year by year.In addition,in recent years,with the increase of renewable energy in the system,on the one hand,the energy structure has been optimized,and on the other hand,the environmental pollution caused by the power generation industry has also been reduced.However,the output of renewable energy is relatively intermittent and uncertain,which has many negative effects on the distribution system.In this context,this paper considers the charging strategy of electric vehicles when renewable energy is added.In view of the advantages of the current power exchange model,the demand scheduling problem of charging and replacing power stations is studied.Two aspects consider the optimal planning of the distribution system.The article mainly includes the following aspects:(1)Analyze the output characteristics of wind power and photovoltaic,and use different clustering methods to simulate their respective uncertainties.The load calculation model in disordered and ordered charging mode can effectively reduce the peak-to-valley difference of the load and improve the stability of the distribution system when the electric vehicle is effectively combined with renewable energy output.(2)In order to meet the ever-increasing number of electric vehicles,improving electric vehicle-related supporting facilities is the prerequisite for ensuring large-scale development of electric vehicles.According to the operation mode and demand analysis of the charging and replacing power station under the power changing mode,the load calculation model of the charging and replacing power station is obtained.Based on the judgment of electric vehicle demand for power exchange,a power exchange strategy based on minimizing load standard deviation and peak-to-valley difference as the objective function is proposed.It is more conducive to optimizing the charging load and realizing the function of peak and valley filling not only for the scheduling of battery replacement in the station.(3)Propose a multi-scenario coordinated planning strategy for the distribution system that considers renewable energy and electric vehicle charging and replacing power stations.Using scene extraction technology,select conventional load development level,electric vehicle ownership and electric vehicle charging strategy as the Factors,establish the objective function of the coordinated planning of the distribution system,and finally use calculation examples to show that the optimal scenario planning scheme can save investment capital and provide practical feasibility.