Design And Implementation Of V2G Electric Vehicle Energy Trading System Based On Blockchain

Vehicle-to-Grid(V2G)technology is an emerging technology for the interaction between rechargeable electric vehicles and the power network.It has become an important direction for the development of new electric power system to mediate the load at different periods by purchasing energy storage and sending back between electric vehicles and the power network.At present,most of them adopt the centralized V2G transaction mode,which leads to the problems of distrust among subjects and unfair income distribution in V2G transactions involving multiple parties.Among V2G,electric vehicle owners often treat V2G transaction networks negatively due to factors such as mileage anxiety,battery loss and opaque pricing strategy.The blockchain is a decentralized storage structure with features such as security,credibility,non-repudiation,and non-tampering.Its integration with the V2G transaction process will effectively solve the problems of trust and fairness in the transaction process.Therefore,this paper constructs a distributed power trading model for electric vehicles in V2G network based on blockchain,designs an incentive mechanism based on contract theory,formulates a reverse auction strategy based on dynamic pricing based on the number of bidding rounds,and develops a blockchainbased V2G electric vehicle energy trading system.Details as follows:First of all,in order to solve the problem of mistrust between multiple parties in the V2G trading network,this paper constructs a distributed power trading model for electric vehicles in V2G network based on blockchain,and designs the transaction process between electric vehicles,local energy aggregators(LEAG)and platforms.An incentive mechanism based on contract theory is further proposed to motivate electric vehicle owners to participate in the V2G transaction network by customizing personalized contract items.In order to further formulate a reasonable electricity pricing strategy,a reverse auction algorithm based on dynamic pricing based on the number of bidding rounds is designed.The bidder adjusts the bidding price according to the number of failed bidding rounds to improve the chance of successful bidding,and dynamically optimizes the power pricing.Secondly,based on the electric vehicle energy transaction model,this paper designs and implements a blockchain-based V2G electric vehicle energy transaction system.Combined with the business characteristics of the auction trading system,the overall architecture and functional modules of the V2G electric vehicle energy trading system based on block chain are designed,and the implementation scheme of the corresponding functional modules is designed in detail.Using the Hyperledger Fabric platform of the consortium chain,functional modules such as user management,vehicle management,transaction execution,and transaction history query have been developed.Finally,the corresponding function test and performance test of the system are carried out.