Distributed Transactive Energy Control of Electric Vehicles Based on Blockchain and Oracle Technology

The traditional centralized scheduling control of large-scale electric vehicles (EVs) has problems such as high scheduling costs, low reliability, and difficulty in making scheduling data open and transparent. To address the problems, based on blockchain and oracle technology, this paper proposes a distributed transactive energy control (DTEC) method for electric vehicle aggregators (EVAs) to participate in ancillary services in power system. Firstly, the framework of the proposed DTEC for EVAs is proposed using blockchain technology. Secondly, considering the execution requirements of smart contracts, a secure and fast on-chain and off-chain data interconnection module based on oracle technology is proposed for off-chain intelligent optimal dispatching decision model (ODDM), real time charging data of EVs, and on-chain electric vehicle control smart contract (EVCSC). Thirdly, an off-chain ODDM that considers multiple parties' interests is designed. Finally, taking the scenario of EVs participating in peak shaving and valley filling in the ADN as an example, the proposed method is verified based on the blockchain test platform built through Ethereum and Chainlink.