The invention discloses a power conversion method and system for a multi-modular electric vehicle charging station. The method comprises the steps that 10 KV high-voltage alternating current introduced from a power grid side passes through a three-phase rectifier module and then is conveyed to a multi-modular charging station, and finally an electric vehicle is charged through a charging gun. The system comprises: a rectifier module used for converting high-voltage alternating current into direct current; and a current conversion module which is used for converting the direct current obtained by conversion of the rectifier module into direct current meeting the charging standard of the electric vehicle. Compared with a traditional 10KV automobile charging station power conversion system, a 10KV/380V transformer is omitted; 10KV alternating current is directly converted into direct current, the voltage stress of a switch tube is reduced, and harmonic pollution is reduced; transmission is achieved through thin cables, materials are saved, and cost is reduced; and the voltage level of each converter can be reduced to kilovolt level or even lower, so that the switching frequency reaches a higher level, and the power density is further improved.

    本发明公开了一种多模块化电动汽车充电站电力变换的方法与系统。所述方法包括从电网侧引入的10KV高压交流电通过三相整流模块,然后输送到多模块化充电站,最后通过充电枪给电动汽车充电。所述系统包括整流模块:用于将高压交流电变换成直流电;电流变换模块:用于将整流模块变换所得的直流电变换成符合电动汽车充电标准的直流电。本发明相对于传统10KV汽车充电站电力变换系统,省去了10KV/380V的变压器;直接将10KV交流电直接变换为直流电,降低开关管的电压应力并减少谐波污染;用较细电缆线实现传输,节省材料、降低成本;能把各变换器的电压等级降到千伏级甚至更低,使开关频率达到更高水平,进而提高功率密度。


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    Title :

    Power conversion method and system for multi-modular electric vehicle charging station


    Additional title:

    一种多模块化电动汽车充电站电力变换的方法与系统


    Contributors:
    WANG WEI (author) / HUANG LIANG (author) / LU CHIHUA (author) / YUAN SHOULI (author) / WANG HAIXIONG (author) / XU AIHUA (author)

    Publication date :

    2021-05-18


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    H02M APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS , Anlagen zur Umformung von Wechselstrom in Wechselstrom, von Wechselstrom in Gleichstrom oder umgekehrt, oder von Gleichstrom in Gleichstrom und zur Verwendung in Netzen oder ähnlichen Stromversorgungssystemen / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen



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