Electric vehicle charging station system based on AC and DC dual buses

Abstract

The invention provides an electric vehicle charging station system based on an AC / DC double bus. The electric vehicle charging station system based on the AC / DC double bus adopts a system framework of the AC / DC double bus, connection of the bus with multiple subsystems, modularization in each subsystem and dual data interaction channels, and has the complete function of the electric vehicle charging station system. The electric vehicle charging station system based on the AC / DC double bus takes a bidirectional converter as the core, the AC side of the bidirectional converter is connected with the AC bus, the DC side of the bidirectional converter is connected with the DC bus, and energy flows bi-directionally between the DC and AC buses through the bidirectional converter. The DC bus is connected with an energy storing subsystem, a photovoltaic subsystem, a wind power subsystem and a plurality of DC charger subsystems. The AC bus is connected with an electric supply access subsystem, an active power filter APF access subsystem, a diesel engine generator access subsystem and a plurality of AC charger subsystems. The quantities and the capacities of the AC charger subsystems and the DC charger subsystems can be flexibly selected according to actual needs. The electric vehicle charging station system based on the AC / DC double bus is flexible in configuration and high in power supply reliability, enables the electric vehicle charging station load to combine with new energy power generation, and realizes the sustainable and stable operation of the system.

Description

technical field [0001] The invention belongs to the field of electric vehicle charging station, new energy power generation access and reliable power supply. The system has the complete function of electric vehicle charging station, and realizes the AC and DC hybrid access of various energy sources such as mains power, diesel generator, photovoltaic power, and wind power. It is suitable for fast charging of DC250V-DC750V full range of electric vehicles, slow charging of AC220V and charging of independent battery packs in DC30V-DC90V electric vehicle battery replacement stations, and can be used for grid connection of excess power generated by new energy. Background technique [0002] On the one hand, fast charging of a large number of electric vehicles at the same time will cause a large load impact on the distribution network, resulting in excessive fluctuations in the power flow of the distribution network, making it difficult to maintain stable operation; at the same time,...

AI Technical Summary

Problems solved by technology

[0002] On the one hand, fast charging of a large number of electric vehicles at the same time will cause a large load impact on the distribution network, resulting in excessive fluctuations in the power flow of the distribution network, making it difficult to maintain stable operation; at the same time, in many remote areas due to low utilization and construction costs Due to reasons such as high energy consumption and difficulty in power transmission, it is difficult for conventional electric vehicle charging station networks to extend to these areas, which limits the scope of use of electric vehicles

On the other hand, resources such as photovoltaics and wind power are extremely abundant in remote areas, but due to the intermittent, unstable, and uncontrollable characteristics of new energy power generation, the full utilization of such resources is limited.

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