Ordered charging method based on linear power flow model solution for electric automobile battery charging and replacing station

Abstract

The invention discloses an ordered charging method based on a linear power flow model solution for an electric automobile battery charging and replacing station. The method comprises the following steps: (1) establishing a replaceable battery ordered charging optimization model of the electric automobile battery charging and replacing station; (2) performing power flow computation; (3) solving the ordered charging optimization model; and (4) charging replaceable batteries according to a solution. A method combining linear power flow and a genetic algorithm is provided. Variations of a node voltage and branch power after variation of a charging load is rapidly computed through a linearization method, and errors in a linear power flow process are compensated through iteration of the genetic algorithm, thereby rapidly and effectively solving the replaceable battery ordered charging optimization model of the battery charging and replacing station being not supplied with power through a special line. Through adoption of the method, valley filling effects of the charging loads of the electric automobile replaceable batteries on a power grid load curve can be brought into play; the utilization ratio of power grid power equipment is increased; the power grid risk is lowered; the charging cost can be lowered remarkably; and the running economic benefit of an electric automobile is increased.

Description

technical field [0001] The invention relates to a charging method for an electric vehicle charging and swapping station, in particular to an orderly charging method for an electric vehicle charging and swapping station based on linear power flow model solution, and belongs to the technical field of electric vehicle charging and swapping stations. Background technique [0002] At present, the primary energy consumption consumed by the transportation industry accounts for about one-fifth of the total global primary energy consumption, and carbon dioxide emissions account for one-fourth of the world's total emissions, nearly half of which come from passenger vehicles. According to the "Technical Route of Pure Electric and Hybrid Electric Vehicles" report issued by the International Energy Agency: If no effective control and improvement measures are taken, by 2050, the world's greenhouse gas emissions will double, and the demand for crude oil will also exceed the safety limit , ...

AI Technical Summary

Problems solved by technology

In order to reduce the impact of electric vehicle charging load on the power grid, scholars have done a lot of research work on the charging optimization of electric vehicles. However, the previous optimization work did not consider the grid structure and charging characteristics of the battery. The practicality of charging optimization for changing batteries is still poor

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