Equilibrium Optimization Research On Multilateral Trading Of Electricity Based On Blockchain Technology

With the deepening reform of the power system,the power grid gradually returned to the basic power transmission and distribution functions,opening up market-oriented competition transactions at both ends.Under the new situation,large-scale distributed power generation will develop rapidly,and more and more intelligent distributed selling/purchasing electricity entities with independent decision-making ability will participate in the power market,forming a geographical dispersion of transaction entities and massive data on transaction information.If the traditional centralized transaction method is followed,it will inevitably lead to high cost,low efficiency and security issues,and a new transaction method is needed to realize the marketization of distributed generation.Blockchain technology emerged with the development of Bitcoin,which triggered a new research boom around the world.Its decentralized peer-to-peer transaction characteristics and trust realization mechanism serve a wide range of financial transactions,and have broad application prospects in terms of settlement,payment,and accounting.In the power field,the economic nature of the power market is compatible with the blockchain technology,and the distributed technology of the blockchain can play an important role in the transaction subject authentication,transaction information confirmation,and accounting settlement in the power market.Based on the existing research,this thesis proposes to apply the blockchain technology to the multilateral trading of electricity.The distributed agents of selling/purchasing electricity represented by distributed generations and response loads participate in the electricity market through blockchain technology.And it achieves a balanced optimization process for point-to-point direct transactions between market entities.Firstly,this thesis analyzes the matching of blockchain and multilateral trading of electricity on the theoretical,technical support and main function.The framework for multilateral trading of electricity under Consortium Blockchain scenario is proposed,and agents of selling/purchasing electricity are respectively included in the sales side trading chain and the demand side trading chain according to the transaction attributes,and the transaction subject market access certification is realized.Then,this thesis establishes a system of multilateral trading of electricity to achieve equilibrium optimization of multilateral trading of electricity in the transaction layer,expansion layer,and blockchain layer.In the transaction layer,the agents perform the distributed electricity optimization of the price response under the influence of the tidal current of the grid;in the expansion layer,using the electricity information and quotation strategy in the transaction layer,establish a potential game optimization model to achieve market clearing.In view of the dual circulation property of electric goods,the transaction layer and the expansion layer present a bi-level optimization essence,and the two-layer optimization model is solved by the particle swarm optimization algorithm and the distributed algorithm.Finally,the blockchain layer provides the technical basis for contract packaging of multilateral trading of electricity information with bi-level optimization.The Matlab programming environment is used to generate the Merkle tree form and blockchain structure of the multilateral trading information block,and the effective implementation of the blockchain to the multilateral trading of electricity equilibrium optimization is verified.