Research And Application Of Blockchain Technology In Distributed Photovoltaic Scenarios

As the country put forward the goal of carbon neutralization and carbon peaking in 2020 to address the energy problems existing in the process of economic development,distributed photovoltaic has attracted more and more attention from the government and enterprises.However,in the process of popularization and development,distributed photovoltaic faces the problems of low data security and high transaction costs.Due to the characteristics of blockchain technology,such as decentralization,imtampability and low transaction costs,it is gradually applied in the field of distributed photovoltaic.The asymmetric encryption technology of blockchain can solve the problem of low data security in distributed photovoltaic,and the smart contract and consensus mechanism can reduce the transaction cost in distributed photovoltaic and improve the transaction trust of photovoltaic.However,in the process of the application of blockchain technology in distributed PV,there are still some problems such as low consensus efficiency,small consensus throughput,many transaction subjects and frequent transactions.Based on this,this paper studies the application of blockchain technology in distributed PV scenarios.Firstly,aiming at the problems of low throughput and low consensus efficiency of PBFT consensus algorithm commonly used in distributed photovoltaic trading systems,an optimized PBFT consensus algorithm based on certificate of authorized shares mechanism and node importance mechanism is proposed.Firstly,the trust-node election is carried out based on the authorization certificate mechanism,and the consensus efficiency of PBFT algorithm is improved by reducing the number of nodes participating in the consensus.Finally,node importance mechanism is introduced to prevent malicious nodes and inactive nodes from harming the system,and improve the security and stability of the optimized PBFT consensus algorithm.Secondly,aiming at the problems of multiple transaction subjects and frequent transactions in power trading in distributed photovoltaic trading system,an optimized distributed photovoltaic trading model based on demand side response is proposed,and smart contracts and privacy mechanisms are designed based on this model.Firstly,the framework of intelligent contract is designed from the aspects of main body and process.Secondly,in the aspect of demand-side response,through three stages of preparation,implementation and verification,the price-type timing demand-side response of peak cutting and valley filling is realized.Finally,in terms of privacy mechanism,private data can be introduced to protect one organization from malicious access and attack by another organization,such as electricity price and transaction order.Finally,a distributed photovoltaic trading system based on blockchain technology is designed and developed,and consensus algorithm,smart contract and privacy mechanism optimized based on distributed photovoltaic scenarios are introduced.After the trading system is built,the system function and performance test of the distributed photovoltaic trading system is carried out to verify the effectiveness and superiority of the system.