Research On Security Of Smart Grid Condition Monitoring Data Based On Blockchain

The storage and sharing of smart grid condition monitoring data are performed in trusted central nodes in the grid.There are some security problems in the storage mode of the central node,such as the data of the central node has been tampered by the illegal personnel,the malicious attack on the central node,and the central node may face single point failure.Due to the characteristics of decentralized,tamper proof and distributed storage,blockchain technology has great application potential in the field of smart grid condition monitoring data security storage and sharing.The completed main research work includes.(1)Research on the secure storage scheme of smart grid condition monitoring data based on consortium blockchain.Asymmetric encryption technology is used to protect the confidentiality of the condition monitoring data.The data collection base station uses identity authentication to verify the condition monitoring data collected by the sensor-aware nodes,so as to prevent the stored data from being tampered by the third party,single point failure and other security issues.Based on the blockchain chain storage structure,the consortium blockchain is used to store the collected condition monitoring data.By analyzing the mutual authentication,anonymity,and non-traceability of the scheme,and comparing the storage cost and calculation cost of the scheme with other schemes,the results show that the storage scheme can realize the efficient and secure storage of condition monitoring data.(2)Research on sharing protection scheme of smart grid condition monitoring data based on consortium blockchain.In order to realize the secure sharing of smart grid condition monitoring data,a sharing protection scheme of smart grid condition monitoring data based on consortium blockchain is proposed.The proxy re-encryption technology and blockchain technology are used to realize the encryption and sharing of condition monitoring data.By analyzing the data security and blockchain security of the scheme,and comparing the data retrieval efficiency of the scheme with other schemes,the proposed scheme can ensure the security of the data collection base station and the control center in the process of querying and accessing the condition monitoring data.(3)Research on storage and sharing system of condition monitoring data of smart grid.In order to make the proposed condition monitoring data storage and sharing protection scheme,it can be practically applied in the smart grid.A smart grid condition monitoring data storage and sharing system based on consortium blockchain is designed,and the process of building the system is described in detail,and the storage performance and sharingperformance of the system are tested.The experimental results show that the storage performance and sharing performance of the system are high,which can meet the requirements of smart grid for data storage and sharing performance.For the proposed scheme,the security analysis and performance analysis are carried out respectively.The analysis results show that the proposed scheme meets the security requirements and has better performance than other schemes.