Multi-source power supply system and method therefor

The invention discloses a multi-source power supply system, which comprises a shell, wherein a shock-proof layer is arranged on an inner wall of the shell; an energy accumulator, a first AC power source, a second AC power source, an output voltage feedback device and an output voltage control module are arranged in the shell; the first AC power source, a first AC power source rectifier and the energy accumulator are sequentially connected; the second AC power source, a second AC power source rectifier, a one-way conductive controller and the energy accumulator are sequentially connected; the second AC power source rectifier, the output voltage control module, the output voltage feedback device and the energy accumulator are sequentially connected; an insulating isolation panel is arrangedbetween the first AC power source and the second AC power source; the energy accumulator is connected with a load connector; and an operation control module is arranged outside the shell. According tothe multi-source power su