Power supply system and launching ship

The invention discloses a power supply system. The power supply system comprises a power generation unit, a power distribution unit and a cable. The power generation unit comprises at least two generator sets, a material storage device and parallel operation power generation equipment, the at least two generator sets are connected with the parallel operation power generation equipment, and the material storage device is used for storing fuel. The power distribution unit is connected with the power generation unit, and the power distribution unit is provided with a power taking port. One end of the cable is connected with the power distribution unit, and the other end is connected with load equipment. The periphery of at least part of the cable is provided with the protective layer which is resistant to high temperature and moisture, so that the cable is prevented from cracking, short circuit and open circuit in a high-temperature and humid environment, the stability of the power supply system during use is im