| With the progress of science and technology and policy support,distributed generation,represented by photovoltaic generation and wind power generation,has begun to access a large number of power systems.It is an effective means to solve the energy shortage and environmental pollution by bringing the distributed generation technology into the energy Internet framework,making full use of the information technology foundation of the energy Internet and realizing the wide area sharing of the distributed generation technology.However,the traditional method of centralization of distributed power supply management and construction of trading platform has such problems as privacy disclosure,poor scalability,high network bandwidth requirements and opaque transaction settlement.Since the block chain technology has the advantages of centralization,strong privacy protection and open trust,it is very feasible to build an energy Internet distributed power trading platform.It has caused the upsurge of the application of block chain technology in research institutions and energy companies at home and abroad,and has successful cases of the L03 Energy and Consensus Systems cooperation and operation of the Broolyn microgrid block chain.Building an energy Internet based energy transaction platform based on block chain technology is of great practical significance to solve the problem of energy transaction of a large area and a large number of distributed power sources.On the one hand,it can provide low price green electricity for power terminal users.On the one hand,it can provide additional benefits for distributed generation that has been abandoned.It is beneficial to improve the optimal allocation of power system resources and improve the utilization of distributed generation.The paper first analyzes the five aspects of data protection,principal trust,intelligent control,optimization decision and coordination scheduling in the process of energy Internet design,and analyzes the technologies and algorithms used in the data layer,network layer,consensus layer,incentive layer and contract layer through the block chain technology.The feasibility of solving the above five problems.The energy area chain network of the energy Internet and block chain technology is constructed,and the possible new trading subjects and transaction modes that may appear in the energy Internet power transaction are analyzed and summarized.Secondly,in order to realize the one to one,one to many or many to many point to point power transactions between the distributed power source and the power consumer,the distributed generation body needs to share the running data and the grid information generated by the power generation equipment in real time.The energy exchange is guided by the information interaction between the distributed generation and the electricity consumers,so that the production,transmission,utilization and transaction process of energy are coordinated and restricted to each other.Therefore,a hybrid P2P structure based on block chain is constructed to realize the energy information sharing of de centralization,and a block chain double chain structure of point to point power transaction is designed.The function and operation process of the electric energy chain and the transaction chain are described in detail,and the physical constraints that the power chain should be satisfied during the operation process are analyzed in combination with the point to point power transaction process.The operation characteristics of the trade chain are analyzed on the basis of the energy chain.Combined with the asymmetric encryption technology,consensus mechanism and intelligent contract of block chain,the advantages of double chain structre are analyzed in terms of its scientificity,feasibility and security.The simulation shows the excellent network characteristics and high scalability of the proposed topology,and the de centralization advantages and security characteristics of the block chain technology.Finally,considering that the auction is a negotiation mechanism,the negotiation intermediary does not need to be a real agent,it can be a set of automatic execution rules,and the point to point power trading mode and bidding strategy based on the block chain smart contract and the continuous two-way auction mechanism are proposed.The buyers and sellers can submit quotations to smart contracts at any time within the transaction cycle and adjust the price according to the transaction results disclosed by the smart contract.Once the price matches are matched,the transaction settlement can be realized and the transaction settlement can be realized through the block chain smart contract.Taking IEEE13 node power distribution system as an example,the simulation of the example is carried out,and an intelligent two-way auction smart contract is deployed on the development platform of the Ethernet workshop.Through the analysis of the 1000 electric energy two-way auction,it is shown that the two-way auction of the point to point power transaction through the block chain smart contract is not only feasible,but also efficient and without manual intervention.The validity and feasibility of the proposed method is verified. |
PDF Full Text Request