Offshore comprehensive energy generating system

The invention discloses an offshore comprehensive energy generating system in the technical field of energy development and utilization. The offshore comprehensive energy generating system comprises a wave energy conversion device, a wind energy conversion device, an ocean current energy conversion device, a power transmission case and a direct drive generator, wherein the wave energy conversion device, the wind energy conversion device and the ocean current energy are respectively connected with the power transmission case, the power transmission case is connected with the direct drive generator, the wave energy conversion device is used for converting wave energy to mechanical energy and outputting the mechanical energy to the power transmission case, the wind energy conversion device is used for converting wind energy to mechanical energy and outputting the mechanical energy to the power transmission case, the ocean current energy conversion device is used for converting ocean current energy to mechanical energy and outputting the mechanical energy to the power transmission case, the power transmission case is used for receiving the mechanical energies output by the wave energyconversion device, the wind energy conversion device and the ocean current conversion device and superposing the received mechanical energies to drive the generator to generate electricity. By the adoption of the offshore comprehensive energy generating system, the problems of the traditional offshore comprehensive energy generating system, such as poor stability and complicated structure, can besolved.