Distributed Transaction Model of Electricity in Multi-microgrid Applying Smart Contract Technology

doi:10.12204/j.issn.1000-7229.2021.01.005

Abstract

Abstract:

A large number of independent decision-making microgrids participate in the power market competition in the distribution network, which makes the traditional centralized trading face the problems of long decision-making time, high cost of trust and privacy security. In the face of this situation, a distributed transaction model of electricity in multi-microgrid applying smart contract technology is proposed. Firstly, a smart contract model of electricity trading negotiation market is constructed to protect the interests of users. Secondly, in order to realize safe operation of the distribution network, a network security constraint method suitable for smart contract is proposed. Finally, according to the transaction model, the off-chain scalability architecture of the blockchain is improved to ensure the computing capability of the blockchain, and ensure the security and traceability of all historical data storage. The method is tested on the IEEE 33-bus network, and the results show that the proposed distributed transaction model does not violate the network constraints, and the market participants can profit from the transaction.

Key words: distributed transaction, smart contract, off-chain scalability, network constraints

CLC Number:

TM73

MA Teng, LIU Yang, LIU Jun, JIANG Zheng, XU Lixiong. Distributed Transaction Model of Electricity in Multi-microgrid Applying Smart Contract Technology[J]. ELECTRIC POWER CONSTRUCTION, 2021, 42(1): 41-48.

Figures/Tables 18

Fig.1 Framework of distributed electricity trading system for distribution network

Fig.2 Principle of the smart contract

Fig.3 Bottom support framework based on double chains

Fig.4 Structure of IEEE 33 bus system

Fig.5 Impact of negotiation communication factors

Fig.6 Electricity transaction

Table 1 Cost of electricity transaction

Fig.7 Histogram of bus voltages

Table 2 Temporary contract of microgrid 9 元

Table 3 Trading results of microgrid 9

Fig.8 Scheduling of microgrid 9

Fig.9 Comparison of electricity transactions

Fig.10 Comparison of branch capacity occupation

Table A1 Time sharing tariff of microgrid元/(kW·h)

Table A2 Parameters of energy storage device

Fig.A1 Wind turbine output

Table A3 Branch parameters of distribution network

Fig. A2 Photovoltaic output

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