Research And Implementation Of Power Data Storage Scheme Based On Blockchain

As the core value of smart grid,power data provides scientific decision support for smart grid operation control and power data is an important guarantee for the healthy,stable,and sustainable development of the national economy.However,there is a risk of being tampered with and the data control center facing natural disasters during the storage of power data,so that the privacy of power data cannot be effectively guaranteed.It is very important to find a secure power data privacy preservation method through emerging technologies.The blockchain technology that had risen with Bitcoin has the characteristics of decentralization,tamper resistance,and traceability,which has become a new approach to solve the current privacy protection problem of power data.The contributions of this thesis are listed as follows:1.The risk of traditional power data storage is analyzed,combined with the characteristics of blockchain decentralization and anti-tampering,a power data storage solution based on blockchain is proposed to effectively protect power data from being tampered.By using the underlying architecture of the Hyperledger Fabric blockchain,the blockchain-based power data storage solution is designed from five levels: the application layer,the contract layer,the consensus layer,the network layer,and the data layer.2.The consensus efficiency of blockchain technology used in power data storage is improved,combined with the specific characteristics of the smart grid environment and substation nodes,the traditional distributed consensus algorithm Paxos algorithm is selected for consensus sorting.Meanwhile,we have improved the Paxos algorithm from two aspects of algorithm liveness and message communication delay,which has accelerated the speed at which blockchain nodes reach agreement on a proposal.3.A state synchronization mechanism to ensure the consistency of the status of each node’s execution of smart contracts.In the actual power scenario,the network environment of each substation node is different,and the speed of executing smart contract is different,resulting in a reduction in the efficiency of blockchain operation.So substation nodes in different network delay states can quickly achieve the consistency of execution status by using state synchronization mechanism,reducing transaction delays caused by environmental differences in smart grid nodes.By building an experimental scenario based on the Fabric network,the function and performance of the power data privacy preservation scheme are tested.The results show that our work is feasible and practical,which have an important value and application prospects for the privacy preservation of power data.