The invention relates to a power frequency isolation type high-power charging and discharging system, which is characterized in that a multi-winding transformer is used for carrying out isolation andvoltage reduction to provide an alternating-current incoming power supply for a plurality of bidirectional AC/DC conversion units, the bidirectional AC/DC conversion units are output to a high-power charging terminal through a power switching unit, and a power control unit controls a power flow direction and a power switching mode, and the charging and discharging control unit controls the power flow to realize information interaction of each subunit and bidirectional energy flow of the power grid and the electric vehicle, thereby improving the utilization rate and system efficiency of the charging and discharging system, and reducing the operation cost of the whole station. Meanwhile, according to the power frequency isolation type high-power charging and discharging system, a bidirectional AC/DC change technology with a PFC function and a liquid cooling heat dissipation technology are adopted, harmonic pollution of a power grid is reduced, the equipment protection grade and the charging and discharging efficiency are improved, and different types of charging and discharging interfaces can be connected.
本发明涉及一种工频隔离型大功率充放电系统,通过多绕组变压器进行隔离降压,为多个双向AC/DC变换单元提供交流进线电源,双向AC/DC变换单元经过功率切换单元输出至大功率充电终端,功率控制单元控制功率流动方向及功率切换方式,充放电控制单元控制功率流动大小,实现各子单元信息交互,电网与电动车辆的能量双向流动,提升充放电系统利用率及系统效率,降低整站运行成本。同时,本发明工频隔离型大功率充放电系统,采用自带PFC功能的双向AC/DC变化技术及液冷散热技术,减小电网的谐波污染,提高设备防护等级和充放电效率,可连接不同类型的充放电接口。
Power frequency isolation high-power charging and discharging system
一种工频隔离大功率充放电系统
2021-02-05
Patent
Elektronische Ressource
Chinesisch
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