Smart Transaction Strategy Based on Blockchain for Multiple Microgrids

doi:10.12204/j.issn.1000-7229.2021.12.013

Abstract

Abstract:

With the opening of the power market on the distribution grid side, the power trading participants are diversified, and the power trading strategies are also different. Aiming at the problems in the existing research on multi-microgrid power trading, such as no complete transaction process and mostly on centralized transaction, this paper proposes a smart transaction strategy based on blockchain for multiple microgrids. Firstly, we establish a multi-microgrid intelligent transaction architecture based on blockchain to provide a decentralized transaction platform. Secondly, we establish a multi-microgrid electricity-trading strategy. In the first round of trading, microgrid nodes make quotations considering transaction risk factors, and then clear the market according to the clearing strategy considering the reputation through two-stage bidding match. In the next round of trading, the risk factor can be adjusted adaptively to obtain higher benefits. Finally, a reputation consensus mechanism is used to achieve data consistency. The simulation results prove the effectiveness of the trading strategy and reputation consensus mechanism.

Key words: multi-microgrid, blockchain, transaction risk factor, reputation, consensus mechanism

CLC Number:

TM37

TAO Menglin, WANG Zhijie. Smart Transaction Strategy Based on Blockchain for Multiple Microgrids[J]. ELECTRIC POWER CONSTRUCTION, 2021, 42(12): 116-126.

Figures/Tables 15

Table 1 Comparison of four consensus mechanisms

Fig.1 Multi-microgrid intelligent transaction framework based on blockchain

Fig.2 Intelligent transaction process of multiple microgrids

Table 2 Initial parameters of the microgrid

Fig.3 Microgrid price queue

Fig.4 Changes in microgrid quotations during the continuous bidding phase

Fig.5 Electricity changes during the continuous bidding phase

Table 3 Transactions in the centralized matching stage

Table 4 Economic comparison of the two electricity clearing strategies

Fig.6 Change process of transaction risk factors

Fig.7 Change process of quotation

Fig.8 Change process of microgrid benefit

Fig.9 Economic comparison under three operating modes

Fig.10 Relationship between the reputation of microgrid nodes and the probability of successful mining

Fig.11 Block generation time in three scenarios

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