Research On Planning And Decision Technology Of EV Charging Station Considering PV Power Generation

As the main carrier of clean replacement and electric energy replacement in the field of transportation,electric vehicles play an important role in energy conservation and emission reduction,as well as in helping to realize the goal of "dual carbon".At the same time,as the number of electric vehicles increases year by year,problems such as charging demand and charging experience of electric vehicles also highlight the irrational layout of charging stations in some areas,low equipment utilization rate and high operation and maintenance cost,which seriously restrict the healthy and sustainable development of electric vehicle industry.In order to improve the rationality of the layout and configuration of EV charging stations and give full play to the flexible regulating role of EV charging stations in promoting PV power consumption,this paper studies the planning and decisionmaking methods of EV charging stations considering PV power generation,mainly including the following three aspects:Firstly,the typical architecture and functional specifications of EV charging stations are studied.Based on the basic principles and technical characteristics of electric vehicle charging and photovoltaic power generation,a typical architecture of multi-station integrated electric vehicle charging station including photovoltaic power generation and battery energy storage was proposed.This paper expounds the operation mode and functional specifications of EV charging stations from the aspects of power supply security,reliability,sufficiency and coordination,which provides decision basis for the optimal configuration of EV charging stations.Secondly,the optimal configuration model of the optical-storage-charge fusion system is established.This model takes the cost-benefit optimization of comprehensive construction and operation of charging stations as the objective,considers the uncertain factors such as user charging behavior,and through the guidance of power market price signals,optimizes the composition of each subsystem in the multi-station integrated charging station system.In the configuration model,the constraints of equipment capacity and power balance in the station are also taken into account.On this basis,considering carbon trading price,a carbon income model of distributed energy system is established.The paper takes a typical project as an example for configuration analysis,verifies the correctness and effectiveness of the model and algorithm,and provides method support for the capacity allocation of a single EV charging station.Finally,an EV charging network planning method considering the coupling of PV power generation is proposed.In this method,the random characteristics of EV charging behavior are quantified in the form of probability distribution function by considering factors such as EV type,endurance and spatio-temporal distribution of charging behavior.On the one hand,the site layout of EV charging network is determined by clustering analysis of charging station location based on endurance capacity and comparative analysis of the convenience of connecting to the grid.On the other hand,the installation capacity of charging facilities of EV charging stations is determined through capacity optimization of EV charging facilities.Considering the geographical space limitations and resource conditions of each charging station site,an optimal configuration model of photovoltaic power generation system supporting the EV charging network was established to meet the clean energy power supply requirements of EV charging stations.A traffic network system was taken as an example to analyze the EV charging network planning,which verified the correctness and effectiveness of the above method.