Decentralized Trading Mechanism in Photovoltaic Distribution Network Based on Blockchain

doi:10.11985/2023.01.018

Abstract

Abstract:

Establishing a reasonable and effective power market trading mechanism, which encourages power users to take part in demand response and promote the local consumption of distributed renewable energy, is a significant way to achieve multi-party win-win, economic, and environmental protection in the operation of the distribution network. Based on the distributed storage and smart contract technology of blockchain, an electric energy trading transaction mechanism in the distribution network is proposed. To promote the local consumption of photovoltaics, a photovoltaic internal electricity price model is designed to guide flexible loads in response to market demand for electricity. And the credit value model is introduced to punish breaches of contracts during the trading process, supervising photovoltaics users to keep their promises and protect the rights and interests of power users. Moreover, a smart contract model is established to maximize the benefits of photovoltaic users and minimize the cost of purchasing electricity for flexible loads. Both parties of buyers and sellers negotiate electricity prices and formulate reasonable demand response strategies to reach a consensus on the transaction. Finally, the proposed model is verified and analyzed, and the results show that the trading mechanism can effectively balance the interests of the trading subject and promote the local consumption and utilization of photovoltaic. Meantime, it also can reduce power fluctuations in the distribution network, which is conducive to the safe and flexible operation of the system.

Key words: Blockchain, smart contract, energy trading, photovoltaic users, flexible loads

CLC Number:

TM73

CHEN Yanxia, WEN Yu, ZHAO Cheng, XU Zhen, WANG Ning, WANG Yangyang. Decentralized Trading Mechanism in Photovoltaic Distribution Network Based on Blockchain[J]. Journal of Electrical Engineering, 2023, 18(1): 160-168.

Figures/Tables 12

References 20

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文献	交易对象	关键指标	光伏消纳	需求响应	信用保障机制
[9]	分布式电能用户	交易潮流安全约束
[10]	光伏用户	加密安全算法SM2/3	√	—	—
[11]	电网公司，光伏用户	动态交易系统	√	—	√
[14]	工业用户，电动汽车	交易通信成本		√	—
[15]	新能源，电动汽车	价格博弈模型	√	√	—
[16]	需求响应电能用户	需求响应分配模型	—	√	—

时段	时段类型	电价/[元/(kW·h)]
11:00—14:00，18:00—21:00	峰时	0.99
7:00—10:00，15:00—17:00	平时	0.74
22:00—6:00	谷时	0.49

光伏用户	分布式交易/元	集中交易/元	柔性负荷	分布式交易/元	集中交易/元
1	1 244.68	681.67	1	1 662.65	1 916.39
2	624.39	414.30	2	2 638.66	2 816.95
3	1 700.87	985.46	3	1 724.54	2 015.97
4	1 106.62	732.82	4	7 446.35	8 029.12
—	—	—	5	3 020.07	3 576.15
总收益/元	4 676.56	2 814.25	总成本/元	16 492.27	18 354.58