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Application And Economical Evaluation Of Hybrid Energy Storage System In Fast Charging Station

Posted on:2019-04-28Degree:MasterType:Thesis
Country:ChinaCandidate:F WangFull Text:PDF
GTID:2382330548486609Subject:Agricultural Electrification and Automation
Abstract/Summary:PDF Full Text Request
In order to reduce the environmental pollution and delay the consumption of fossil energy,the advantages of electric vehicle replacing traditional fuel drive are widely concerned.Adequate charging infrastructure support is the most critical factor in order to make users more receptive and adopt electric vehicles,especially for fast-charging power stations.But the fast charging station has the characteristics of strong charging concentration,high charging power and random load,so the security stability and economy of the distribution network will be affected by its access to the distribution network.Therefore,this paper focuses on the disadvantages and improvement measures of the fast charging station access to the distribution network.The research contents of this paper are divided into the following three parts:The common way to obtain electric power in electric vehicles is described,and the load characteristics of the fast charging mode are analyzed emphatically.Based on the load characteristics of DC charger under fast charging mode,the daily load forecasting model of fast charging station is established under the consideration of certain influence.Through the simulation analyze the negative effect of the load on the distribution network caused by the fast charging station,a new energy storage system is proposed in the construction of the fast charging station to weaken the adverse effect.The load characteristics of the fast charging station are analyzed according to the load characteristics and the reasonable energy storage technology — Hybrid storage System composed of battery and super capacitor.The characteristics of super capacitor and battery are analyzed,the charging and discharging model is established,and the operation mode of hybrid energy storage system in fast charging station is put forward,Simulation results show that the proposed hybrid energy storage system can effectively improve the effect of the fast charging station on the distribution network.The economic evaluation model of fast charging station containing mixed energy storage system is established,with the goal of maximizing net present value,the genetic algorithm is introduced to obtain the optimal allocation of capacity and power of two kinds of energy storage technologies in hybrid energy storage system.Compared with the economy of the hybrid energy storage System,the results show that the net income of the fast charging station after the hybrid energy storage system has been greatly improved,and the negative effect of the charging station on the distribution network is improved,and the economy is better.To sum up,this paper aims to reduce the negative effect of the fast charging station on the distribution network,and provide the basis for the reasonable application of the hybrid energy storage system in the fast charging station.
Keywords/Search Tags:electric vehicle, fast charging station, energy storage system, economical evaluation
PDF Full Text Request
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