Management and security analysis of blockchain shard storage for monitoring data on the state of smart substations

The ubiquitous power Internet of Things (UPIoT) provides a crucial platform for energy reform. The key features of blockchain, namely, decentralization, openness, and transparency, are in line with the spirits of the UPIoT. By integrating blockchain and the UPIoT, this paper analyzes the security strategy of the state monitoring system (SMS) for smart substations, constructs a blockchain network for smart substations, and designs a shard storage and management for the proposed model. Unlike the existing plans, our plan shards the transaction data to be stored in the blockchain. The sharding both localizes the data storage system, and maintains the scalability of the security system. Security analysis shows that our plan keeps the information secure, reliable, and private, while reducing the storage occupation of each node. The research results promote the application of blockchain in smart substations. © 2020 International Information and Engineering Technology Association. All rights reserved.