A Double-Chain Blockchain With Economic Attributes and Network Constraints of Prosumer Transactions

With the rapid development of distributed energy, traditional power consumers have been transformed into prosumers who both produce and consume power, and are able to conduct flexible peer-to-peer transactions. Blockchain is a distributed ledger technology suitable for peer-to-peer transactions. However, the single-chain blockchain cannot simultaneously support the network security check and decentralized power transactions. Therefore, a double-chain blockchain and the corresponding peer-to-peer transaction model are proposed with the reorganization of the transaction chain and power chain. The peer-to-peer independent decision-making transactions are achieved through the transaction chain (public chain) to maximize the prosumer's economic interests. The security check and adjusted transaction scheme are achieved through the power chain (alliance chain) with the power network constraint. Based on the Ethereum blockchain development platform, simulations of peer-to-peer transactions in the IEEE 14-node distribution network are implemented. The simulation results show that the designed double-chain blockchain has higher transaction processing efficiency than the single-chain blockchain. The secure and autonomous peer-to-peer transaction of prosumers can be well supported by the proposed method.