Power supply system

The invention provides a power supply system, relates to the technical field of electric power, and can reduce the transformation amount of the power supply system when clean energy is connected to the power supply system of a data center. The power supply system comprises an IT equipment power supply module, a clean energy power supply module and IT equipment, the clean energy power supply module is connected with the IT equipment power supply module; the clean energy power supply module is used for generating first low-voltage direct current through clean energy power generation and outputting the first low-voltage direct current to the IT equipment power supply module; and the IT equipment power supply module is used for generating second low-voltage direct current and second low-voltage alternating current according to the first low-voltage direct current and supplying power to IT equipment of the data center according to the second low-voltage direct current or the second low-voltage alternating current.