Power distribution network optimization method based on cooperation of distributed sharing and centralized clearing

Abstract

The invention discloses a power distribution network optimization method based on cooperation of distributed sharing and centralized clearing. A power distribution network system with cooperation of distributed sharing and centralized clearing is constructed, a power distribution network operator uniformly calculates the electricity price of each node according to the electricity purchase quantityreported by each aggregator, the aggregator transmits the node electricity price to each microgrid in the node, and each microgrid optimizes the operation and transaction of itself according to the node electricity price and interacts with the node aggregator to solve and obtain the electricity purchasing quantity and the electricity purchasing price of each microgrid in the node by adopting a game theory-based model or a Lagrange relaxation-based model, collect the electricity purchasing quantity of each microgrid in the node by the aggregator and send the electricity purchasing quantity tothe power distribution network operator, clear the electricity price of each node again by the power distribution network operator and repeat the steps until convergence. The operation stability of the power grid and the fairness of electricity price clearing are ensured, and free transaction of each microgrid is achieved on the premise of meeting the fairness of electricity price clearing.

Description

technical field [0001] The invention relates to the technical field of power grid operation and distribution, in particular to a distribution network optimization method in which distributed sharing and centralized clearing are coordinated. Background technique [0002] With the development of the electricity market, the electricity price mechanism of the electricity market has attracted extensive attention of scholars at home and abroad and has become a research hotspot. In the current distribution network optimization method, the distribution network operator generally determines the minimum power generation cost according to the marginal power price theory, and uniformly calculates the marginal power price of each node in the distribution network system. This centralized way of clearing power prices can effectively guarantee power. The stability of the system and the power market, but for a huge power system, it is not convenient to calculate the node power price of all n...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the existing distribution network optimization method is difficult to carry out node liquidation and optimization on a huge power system, the present invention provides a distribution network optimization method in which distributed sharing and centralized liquidation are coordinated

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