Research On Charge And Discharge Trading Strategy Of Electric Vehicle Based On Blockchain

In recent years,electric vehicles have been vigorously developed worldwide due to their low-carbon and energy-saving characteristics.However,with the expansion of the scale of electric vehicles,the charging difficulties caused by the randomness and dispersion of the charging load have become more and more serious.On the one hand,the number of electric vehicles is huge and charging is concentrated at all times,and the demand for electric vehicle charging is increasing;On the other hand,charging piles can be divided into public and private charging piles according to the nature of ownership.Public charging piles are unevenly distributed and cover a limited area,while private charging piles only serve their owners and have a high idle rate.Therefore,the existing charging pile facilities cannot meet the normal charging needs of electric vehicles.If things go on like this,the contradiction between the increasing demand for electric vehicle charging and the unreasonable planning of a large number of charging facilities will gradually intensify,and Charging electric vehicles will become increasingly difficult.In view of this problem,the research on EV distributed charge-discharge trading strategy can provide additional charging options for EVs and improve the charging environment of EVs.For distributed power transactions that are distributed,disconnected from the power grid and have strong subjective intentions,decentralized blockchain technology is needed to realize the transmission and storage of distributed information.Based on this,this paper takes electric vehicles on the road as the research object,fully considers the charging and discharging properties of private charging piles and electric vehicles as distributed resources,and designs a blockchain-based private charging piles sharing strategy and a regional electric Vehicle alliance V2V(vehicle-to-vehicle)power transaction matching strategy.On the basis of the matching strategy,the paper puts forward the corresponding electricity price setting method and power transaction volume optimization method.The specific research contents of this paper are as follows:Aiming at the charging difficulty of electric vehicles on the road,a block chain-based private charging pile sharing strategy mechanism was designed with electric vehicles,private charging piles and public charging piles in the region as the research objects.The travel route,charging time and user psychology of electric vehicles were modeled,and the comprehensive evaluation index of electric vehicles to charging piles was calculated,so as to truly reflect the preference degree of electric vehicles to charging piles.On this basis,the charging transaction mechanism of the shared platform is established to obtain the dynamic price of the platform that takes into account the charging pressure within the region.In addition,in order to realize EV users’ evaluation of private charging piles,a charging pile reputation management mechanism based on blockchain and smart contract is designed.The simulation results show that the proposed strategy can not only provide sufficient charging backup schemes for EV users,but also improve the utilization rate of private charging piles,and bring some benefits to the owners of private charging piles.According to the characteristic that electric vehicle battery can be used as distributed energy storage unit,a matching strategy for regional electric vehicle alliance entry was designed.Firstly,based on the assumption that EVs form an alliance to conduct V2 V power trading in a designated location,the cost model and benefit model of EV participation in the alliance are established,and the entry strategy and matching mechanism of EV participation in V2 V power trading are designed.Then,the block chain technology is used to establish the electric vehicle V2 V power trading platform.Through the POS consensus mechanism,the block chain system and incentive distribution method considering the reputation value of the trading platform are designed.The simulation results show that the proposed EV power trading strategy can provide alternative charging options for electric vehicles and bring economic benefits to the transaction participants.In order to realize price game and transaction volume optimization in EV V2 V power trading alliance,a pricing scheme of EV V2 V power trading alliance based on Bayesian game pricing was proposed on the basis of entry matching strategy.The optimal pricing of utility maximization for both parties in the electricity transaction is obtained by using Bayesian game for power transaction pricing,and the power transaction volume that can maximize the benefits of the EV alliance is obtained according to the pricing.Finally,the V2 V power trading mechanism of regional electric vehicle alliance is simulated,and the V2 V power trading mechanism under game pricing strategy is analyzed from different angles.The simulation results show that adopting pricing game strategy in EV alliance can achieve a win-win situation for EV users of both sides,and improve the transaction success rate and transaction efficiency.