The invention relates to an offshore
renewable energy source comprehensive power generating
system, belonging to the technical field of
renewable energy source power generation. The comprehensive power generating
system comprises a single
pile structure (1), three power generating devices and an electrical connecting circuit. The three power generating devices comprise a
wind power generating device, a wave energy power generating device and a tidal energy power generating device which are respectively connected with a direct-current
bus (19) in the comprehensive power generating
system in parallel by three direct-drive permanent
magnet generators (3-1, 3-2, 3-3) and three rectifiers (16-1, 16-2, 16-3), and connected to a reverser (21) on the
bank by a
seabed cable (20), and finally merged in a
power grid by a boosting
transformer (22). The offshore
renewable energy source comprehensive power generating system can integrate the offshore wind energy power generation, wave energy power generation and tidal energy power generation to an organic combined body, and realizes the compatibility of various power generating devices and the credible connection of various power generating devices with the
power grid by the electrical connecting system.