Reseatch On P2P Power Trading Mechanism Design Of Photovoltaic Prosumers Based On Blockchain

Peer to Peer(P2P)transaction as one of the decentralized,equal and independent trading patterns,can be applied to the distributed electricity market to realize the decentralized transaction between prosumers.When P2P power trading uses blockchain technology as the trading platform,it can provide a secure,decentralized and transparent way of trading.Despite the many benefits of combining P2P with blockchain,its application in distributed transactions still faces many challenges.First of all,designing the power market trading mechanism to be decentralized and applied to the blockchain platform is quite complex,requiring a balance between economic efficiency and privacy security.Secondly,with the development of distributed energy as a market entity,the problem of unbalanced electricity consumption under the restriction of its physical characteristics is also urgent to be solved.Therefore,when electricity users with distributed resources begin to participate in electricity market transactions as prosumers in order to pursue electricity economy and reliability,the design of an equal and independent trading mechanism is the premise for them to participate in market competition.According to the decentralization characteristics of blockchain technology and the power consumption characteristics of photovoltaic producers.This thesis designed a P2P trading mechanism and clearing strategy for photovoltaic prosumers based on blockchain.On the basis of realizing the independent transaction of PV prosumers,the economic benefits of PV prosumers are improved.In addition,the design of the island state of prosumers elastic electricity price can improve the user’s income and promote the consumption of unbalanced electricity.The specific work is as follows:(1)This thesis expounds the application status and advantages of blockchain technology in the power market,and analyzes the reliability and economy of P2P transaction based on blockchain by comparing it with centralized transaction.According to the characteristics of the blockchain alliance mode,the appropriate blockchain mode is selected in the transaction mechanism to protect the privacy security of users.(2)Based on the time scale,a day-ahead + real-time P2P transaction mechanism is designed to ensure the reliability of users’ participation in P2P transactions.In the day-ahead market,a completely open P2P transaction mode and decentralized electricity price are adopted,and a multi-product transaction mode is proposed.The objective function of transaction matching is to maximize the profits of prosumers.The real-time market adopts the transaction mode based on P2P pool and the unified clearing price.In the electricity price mechanism based on supply and demand ratio,the incentive compensation fee is introduced to encourage prosumers to participate in P2P transactions.In addition,the optimal transaction path considering transmission congestion and network crossing costs is studied.(3)Under the circumstance that prosumers are disconnected from the large power grid,a P2P transaction flexible electricity price based on cost sharing method and flexible electricity capacity is designed,and the generation cost factor is introduced into it to ensure the economic benefits of users and promote the demand response.According to the quantitative analysis of the calculation examples,it is proved that the income of the flexible electricity price in this thesis is improved compared with that of the unsubsidized photovoltaic feed-in electricity price,and can effectively promote the consumption of unbalanced electricity.(4)Design a P2P trading smart contract based on Ethereum to ensure the safe operation and efficient intelligence on the blockchain platform.The transaction situation of prosumers under the designed trading mechanism is simulated on IEEE14 node,and the income improvement situation of prosumers participating in P2P market compared with P2 G mode is analyzed with an example.The results show that the P2P trading mechanism can protect the privacy of users and improve the economic benefits and overall consumption of prosumers.