Abstract
With the increase of the penetration rate of distributed generation on the distribution network side, the access of a large number of prosumers makes the trading information massive, and the demand of prosumers for more flexible power trading mechanism is also strengthened. Therefore, a weak-centralized power trading mode based on blockchain is proposed in this paper. Trading information is automatically stored in the blockchain in the form of smart contracts. The centralized organization only manages congestion and does not participate in the process of trading matching and settlement. In the distributed security verification, the successive over relaxation (SOR) iterative method is improved in this paper, which improves the iterative efficiency and convergence stability of the distributed algorithm. Finally, a case consisting of six nodes is presented to verify the feasibility of the method.
Highlights
In recent years, with the development of distributed generation technology, users gradually change from oneway consumers to prosumers
As a distributed accounting system with asymmetric encryption, blockchain has the characteristics of decentralization, unforgeability and anonymity, which can well adapt to the decentralized system structure of distribution network side, and is in line with the demands of power trading between prosumers [2]
A is the reduced order node incidence matrix of the corresponding row with the slack nodes removed; Ttemp is the temporary trading matrix formed by temporary trading orders, the element tij in the matrix represents the electric energy provided by the prosumer i to j :
Summary
With the development of distributed generation technology, users gradually change from oneway consumers to prosumers. The traditional centralized power trading mode has some problems, such as high operating cost, difficult to guarantee the fairness and transparency of the transaction. This paper proposes to use blockchain technology to manage the power trading between prosumers. The introduction of blockchain technology into the electricity trading of prosumers can achieve the transaction in a decentralized way, and ensure the efficient and reliable power trading between prosumers. This paper proposes a weaklycentralized electricity trading mode for prosumers. In this mode, the centralized organization still exists, but only manages congestion, and does not directly participate in the matching and settlement process of electricity retail trading between prosumers, which limits the power of the central organization, and satisfies the safe and reliable operation of the distribution network
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