Research On Distributed Resource Transaction Method Considering Renewable Energy Accommodation In Blockchain Environment

Distributed resources can be operated flexibly,and high energy efficiency utilization.Their participation in grid interaction can enrich grid dispatching methods,but the uncertainty of their output and individual profit-seeking attributes are difficult to precisely control.In addition,for renewable energy accommodationin distributed grid,it is necessary to re-quantify the calculation and assessment of the actual consumption of the electricity users.Calculating the proportion of renewable energy in its electricity consumption,and assessing its real consumption can provide a more reasonable assessment for promoting renewable energy accommodation,and enhance the development of renewable energy consumption in a benign direction.In this desertation,studying the distributed resource transaction methodfor renewable energy accommodation,and conducting credit management for market entities in the blockchain environment can provide a healthy and stable development for distributed resources after further participation in electricity market transactions.In this paper,a distributed resource transaction method for renewable energy accommodation is designed,and the entire process is executed on the chain with the help of blockchain,and the transaction is guaranteed to be open and transparent.Firstly,in view of the possible untrustworthiness of distributed resources when participating in power transactions,a blockchain-based distributed resource credit management method is proposed,and smart contracts with bilateral transaction mode and centralized transaction mode are designed;Then,the influence of distributed resource transactions on power flow and network loss is analyzed,and a distributed optimization algorithm considering the privacy protection and power flow is designed,and distributed optimization is carried out on the blockchain.Finally,the actual renewable energy consumption of power users is analyzed,and a blockchain-based renewable energy power tracking platform is designed to record and trace the consumption of renewable energ.The main research work of this paper is as follows:(1)The overall framework of distributed resource credit management in the blockchain environment is established.Based on the deviation between the actual output and the contract output of distributed resources,a distributed resource credit evaluation system is designed,including the performance indicators of subscription,the reliability of scheduling time and the reliability of scheduling capacity.The credit value calculation method of market participants is proposed,so that high-credit distributed resource suppliers can obtain higher profits,guiding them to generate electricity according to the bid-winning power,and achieving the purpose of maintaining market order.Finally,write the corresponding codes of smart contract,deploy it in Rinkeby,which is the simulation network of Ethereum,and test the smart contract performance in the real blockchain environment.(2)A distributed optimization algorithm that considers the privacy protection of market participants and the influence of power flow in the blockchain environment is proposed.The nodes influence index on power flow is proposed to reflect the positive/negative influence of the power exchange of different trading pairs in the power flow,so as to construct a social welfare maximization model considering network usage fees and network losses.Through dual decomposition,the original problem is divided into sub-problems that each market participant can solve by themselves,to protect the privacy data of market participants.Through the example,it is verified that the proposed nodes influence index on the power flow can better guide the electricity transaction to reduce the power flow pressure of the network line.Compared with the centralized algorithm,the calculation result of the proposed distributed algorithm is correct,and finally the privacy protection of market entities is realized through blockchain technology.(3)A assessment method of renewable energy accommodation based on power flow tracking in the blockchain environment is proposed..A renewable energy power tracking platform with the help of blockchain is bulit.codes of smart contracts to realize the process of renewable energy declaration,consumption,tracking,and consumption assessment are designed.The calculation example shows that within the scope of the distribution network,the renewable energy power tracking method,based on the nature of the quota system,can simplify the process of quota assessment,can reduce the gas value consumed by the transaction,and can promote the transition of the quota system from the preliminary stage to the mature stage.