Research On Distributed Electricity Pairing Trading Mechanism In Dayahead Market Based On Blockchain Technology

Distributed generation uses renewable energy nearby.Its production and electricity consumption are completed nearby.And it has the advantages of high energy utilization efficiency,less loss,energy saving and environmental protection.However,with the increase of the penetration rate of distributed energy and the reform of the electricity market,distributed electricity trading faces new opportunities and challenges.First of all,the output of new energy in distributed energy fluctuates frequently,its reliability is poor,and its competitiveness in the market is lower.Secondly,the distributed energy transaction has the characteristics of mass and high frequency,while the traditional trading center is not suitable for distributed energy transaction,which has the disadvantages of high platform operation and maintenance cost,untimely fund transfer and opaque transaction information.Therefore,it is necessary to design a market operation mode and trading mechanism that follows the market rules and is suitable for the characteristics of distributed energy to ensure the safe and stable operation of the power system.Firstly,this paper introduces the background and significance of market-oriented P2 P transaction of distributed generation and distributed power transaction based on blockchain technology,and summarizes the current situation of distributed energy transaction and decentralized transaction based on blockchain.Distributed energy transaction involves transaction behavior among multiple agents,and blockchain technology is compatible with distributed energy transaction,while adopting blockchain platform suitable for distributed transaction mechanism and writing appropriate intelligent contracts are all issues to be considered.Secondly,the distributed electricity pairing transaction mechanism based on the dayahead market is studied.A pair trading model considering the fluctuation of pair allowance is proposed.The superiority of the model is evaluated by the proportion of peak shaving cost sharing Then,a twinning trading model under the weight system of renewable energy consumption responsibility is established,and the green certificate trading mechanism is considered in the current market.The fluctuation of twinning allowance is fully considered.Case study shows that the twinning transaction model considering the fluctuation of twinning allowance can encourage distributed generators and users with similar waveforms to complete the transaction.And the twinning transaction model under the renewable energy consumption responsibility weight system can encourage the transactions to be conducted in a way that the distributed generators and users have the greatest benefits in the electricity market and the twinning allowance fluctuation is low.Then,the intelligent contract based on pairing transaction mechanism is studied.This research analyzes the compatibility and scheme implementation framework of blockchain technology and distributed energy pairing transaction mode in multi-buyer and multi-seller market environment,and shows that blockchain technology can integrate scattered distributed energy and power users.Then,an intelligent contract function suitable for pairing transaction mechanism is written,and Ethereum intelligent contract is compiled and deployed by Remix platform.The debugging results show that the intelligent contract function can realize the functions of transaction winding and historical transaction query,and can meet the expected functions.Finally,the distributed electricity twinning trading mechanism based on blockchain technology is studied.Through credit management of historical data in blockchain,a distributed twinning transaction model based on credit management is established.Case study shows that credit management encourages the generator to generate electricity as planned.Renewable energy is encouraged to improve energy efficiency and emission reduction efficiency through green certificate price setting.Considering the network fee,the power generator and the power user can be encouraged to complete it nearby.By calculating the fluctuation cost,the fluctuation of pairing allowance is reduced and the stability of distributed generation is improved.To sum up,this trading mode can improve the market competitiveness of distributed generation.