Public distribution transformer constant-volume type selection method and system considering charging pile access

Abstract

The invention discloses a public distribution transformer constant-volume type selection method and system considering charging pile access, and the method comprises the following steps: 1), obtaininga public distribution transformer basic load curve in a pure residential area and a commercial and residential scene through clustering analysis; 2) according to the initial charging time, the charging power, the charging duration and the charging frequency, adopting Monte Carlo simulation to obtain an electric vehicle charging load curve; 3) considering the annual change trend of the basic loadrate and the permeability of the electric vehicle, and establishing a comprehensive load natural growth mathematical model; and 4) establishing a combined decision optimization model by taking the minimum full life cycle cost of the comprehensive investment scheme of the orderly charging and newly-built distribution transformer as a target, and determining the application time of the orderly charging and the newly-built time, capacity and model of the distribution transformer. Advantages of the two treatment means are complemented, reliability and economy of distribution network construction are considered, and reference is provided for distribution network expansion planning of large-scale charging pile access.

Description

technical field [0001] The invention relates to a distribution transformer equipment expansion planning method of a power system, and in particular to a method and system for constant capacity selection of a public distribution transformer considering the connection of charging piles. Background technique [0002] Under the background of energy crisis and increasingly prominent environmental problems, electric vehicles have become the focus of governments and automobile manufacturers because of their good energy saving and emission reduction effects and environmental friendliness. In recent years, my country has issued a number of policies to promote the rapid development of electric vehicles in all aspects of production, sales, and use. At the beginning of 2020, the country once again emphasized the acceleration of the construction of new infrastructure such as 5G networks and data centers. Among them, new energy vehicle charging piles, as one of the seven major areas of "n...

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Problems solved by technology

[0006] In general, increasing distribution capacity or orderly charging control can effectively alleviate the problem of charging demand for cluster electric vehicle access. The solution methods and local solutions can no longer meet the needs of the rapid development of this field. Therefore, it is conceivable to combine the above two methods to complement each other.

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