Charging control method suitable for electric vehicle charging station

Abstract

The invention discloses a charging control method suitable for an electric vehicle charging station. A certain number of alternating-current charging piles which supply power by using 220V single phase alternating current are arranged in the charging station, the entrance time, the remaining electric quantity, the estimated leaving time, the charging load curves and other information of entrance vehicles are collected, the collected charging load curves are added into load curves of all current phases, the optimal solution of each phase is obtained through an optimization algorithm, wherein the optimal solution of each phase is a charging queuing sequence, which enables the three-phase load balance degree highest, of all charging vehicles including new entrance vehicles in the whole station. The solution, in which the load balance degree is highest, in the optimal solutions of the three phases serves as the global optimal solution, charging facilities, which are connected with the phases corresponding to the entrance vehicles, are assigned to the entrance vehicles respectively, and the charging queuing sequence corresponding to the entrance vehicles is adopted to serve as the current queuing sequence of charging vehicles; optimization solving is conducted on each entrance vehicle. According to the charging control method, the charging time period of each vehicle is reasonably arranged, so that the three-phase load balance degree keeps optimal all the time.

Description

technical field [0001] The invention relates to a charging control method suitable for an electric vehicle charging station, belonging to the technical field of electric vehicle charging. Background technique [0002] Electric vehicle charging methods can be divided into AC charging and DC charging. The advantages of DC charging are high charging power and short charging time, but the charging equipment is expensive and causes great damage to the battery. Although AC charging takes a long time to charge, it does little damage to the battery. , and the equipment is relatively cheap. [0003] AC charging equipment can be configured in the electric vehicle charging station to provide slow charging service for electric vehicles with long-term parking conditions. AC charging equipment is generally 7Kw, 220V single-phase power supply. In electric vehicle charging stations where a large number of AC charging piles are concentrated, if vehicles are charged randomly and disorderly, ...

AI Technical Summary

Problems solved by technology

AC charging equipment is generally 7Kw, 220V single-phase power supply. In electric vehicle charging stations where a large number of AC charging piles are concentrated, if vehicles are charged randomly and disorderly, serious three-phase load imbalance may occur, which will cause power supply and distribution systems. Three-phase unbalance increases the loss of the transformer, reduces the utilization rate of the transformer, and affects the safe operation of the equipment

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