The invention relates to the technical field of
power electronics, and provides a power supply
system. The power supply
system comprises a high-
voltage input power distribution cabinet, a high-
low voltage conversion cabinet and a low-
voltage output and control cabinet, wherein the high-
low voltage conversion cabinet is internally provided with at least one high-
voltage cabin and at least one low-voltage cabin, the high-
low voltage conversion cabinet is further internally provided with an insulating partition plate located between the high-voltage cabin and the low-voltage cabin, the low-voltage cabin is internally provided with a low-voltage
bus, and the high-voltage cabin is internally provided with a high-voltage
bus; and the high-low voltage conversion cabinet is also internally provided with a plurality of power supply modules, each power supply module is in bridge connection with the high-voltage cabin and the low-voltage cabin, the power supply module comprises a high-voltage cavity, a low-voltage cavity and an isolation unit, the high-voltage cavity and the low-voltage cavity are arranged corresponding to the high-voltage cabin and the low-voltage cabin respectively and electrically connected with the high-voltage
bus and the low-voltage bus respectively, and the isolation unit is connected with one end of the high-voltage cavity and one end of the low-voltage cavity. According to the invention, the input
high voltage is isolated from the output low voltage and the control low voltage so as to improve the safety.