基于云边协同和区块链的分布式能源交易系统设计

分布式能源的广泛发展使其成为电力市场的考虑重点，而传统的数据交互平台无法满足大规模分布式能源交易高效灵活、安全可靠的需求。为解决高信息处理复杂度与安全快速交易需求之间的矛盾，文中提出基于云边协同和区块链的分布式能源交易系统架构和整体设计方案。首先设计了云计算与边缘计算协同并结合两层区块链的系统架构，利用区块链技术实现交易去中心化，提高了交易的自主高效性，利用云边协同提升海量数据的处理能力和交易系统的扩展能力。然后基于双向竞价和预测补偿设计了分布式能源的交易机制，进一步对区块链的核心共识算法进行分析，并采用改进委托权益证明(delegated proof of stake，DPoS)作为交易系统的高效率、高可靠共识算法，实现大规模分布式能源的高效可靠交易，促进分布式能源参与电网调节，提高电网稳定运行水平。最后通过应用实例验证了所提系统对大规模分布式能源交易的适应性和优越性。

Design of distributed energy trading system based on cloud edge collaboration and blockchain

The wide distributed energy has been the focus of power market. However,the traditional power trading platform cannot meet the high efficiency,flexibility,security and reliability requirements of the large-scale distributed energy transactions. To resolve the contradiction between high information processing complexity and the requirements of safe and fast transactions,a distributed energy trading system architecture and its overall design scheme based on cloud-edge collaboration and block chain is proposed. First of all,the system architecture of cloud computing and edge computing collaboration combined with two-layer blockchain is designed to realize transaction decentralization by using blockchain technology. It improves the autonomy and efficiency of transactions,and enhancs the processing capacity of massive data and the expansion capacity of the transaction system by using cloud edge collaboration. Then,a distributed energy trading mechanism is designed based on two-way bidding and prediction compensation, and the core consensus algorithm of blockchain is further analyzed. The delegated proof of stake (DPoS) is used as a highly efficient and reliable consensus algorithm of the trading system to realize efficient and reliable transactions of large-scale distributed energy,thus promoting distributed energy to participate in power grid regulation and improving the stable operation level of power grid. Finally,the applicability and superiority of the proposed system to large-scale distributed energy trading are verified by application example.