The DC microgrid includes a DC bus, and a distributed DC power supply device, a DC energy storage device, a DC charging pile, and a DC charging and discharging device for the replacement battery, which are respectively connected to the DC bus through respective converters.
Recently, the State Intellectual Property Office announced the patent "V2G AC-DC hybrid microgrid power supply system structure", the applicant is Beijing Beibian Microgrid Technology Co., Ltd.
The invention relates to a V2G AC/DC hybrid microgrid power supply system structure, comprising a DC microgrid and an AC microgrid.
The DC microgrid includes a DC bus, and a distributed DC power supply device, a DC energy storage device, a DC charging pile, and a DC charging and discharging device for the replacement battery, which are respectively connected to the DC bus through respective converters.
The AC microgrid includes an AC bus and an AC grid-connected device that connects the AC bus through its converter. The AC bus is connected to the DC bus through a direct AC converter between the microgrids, and is connected to the large grid through an AC grid connection device.
The invention can effectively reduce the rectification link of the photovoltaic inverter and the charging pile, reduce the construction cost and the operation cost of the system, and make the electric vehicle battery serve as the mobile energy storage device to slow down the charging network pressure, increase the stability and reliability of the power grid, and reduce the power system. Operating costs.
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