Research On P2P Power Trading System Of Interconnected Microgrid Based On Blockchain Technology

With the increasing popularity of distributed renewable energy in microgrids,traditional energy consumers are becoming prosumers who can both consume and produce energy.On the one hand,renewable energy is often intermittent and difficult to predict.In this case,the traditional centralized management of electric energy transactions can neither effectively protect the interests of all participants nor coordinate the electricity consumption behavior among consumers.On the other hand,in the past two years,Peer-to-peer(P2P)energy trading has become an important new type of power trading in smart grids.Therefore,it is an important research content to develop a trading system with complete functions,efficient execution,safety and reliability and suitable for distributed energy in different applications.This article first analyzes the development trend of the power industry against the background of P2 P energy trading and conducts a feasibility analysis of the concept of combining blockchain and power.A two-stage P2 P power trading framework based on the Ethereum blockchain is proposed,which integrates power trading within the microgrid and between multiple microgrids.The authorization mechanism and consensus mechanism are designed for different transaction objects and backgrounds,and special tokens for power transactions that follow the ERC20 protocol are issued,laying a foundation for the construction of the transaction system.Then,based on the two-stage P2P power trading framework and the technical characteristics of Ethereum,this paper designs a two-stage auction mechanism,which includes a continuous two-way auction model of power trading within the microgrid and a one-way sealing of power trading between multiple microgrids auction model and corresponding clearing mechanism.Smart contracts were designed and written according to the transaction mechanism,and the entire transaction process was elaborated.In order to facilitate the interaction between users and smart contracts,Decentralized application(Dapp)was further developed as a P2 P power trading platform.Finally,simulation experiments were conducted through the Dapp trading platform,and the results verified the feasibility and effectiveness of the trading platform.Compared with the traditional centralized management of electrical energy transactions,the interconnected microgrid P2 P transactions implemented through this trading platform can not only improve the user's income,eliminate mistrust between users,improve transaction efficiency,but also promote the local consumption of new energy and optimize resource allocation.In addition,due to the introduction of authorization mechanisms and special tokens,the transaction system is more secure and reliable,and the main transaction information is recorded in the blockchain distributed database,which is open,transparent,traceable,and cannot be tampered with.Each node can query transaction information at any time,and it is also convenient for supervision by relevant departments.