Self-aligning to wind facing floating platform supporting multi-wind turbines and solar for wind and solar power generation and the construction method thereon

A self-aligning to wind floating platform supporting multiple wind turbines (17, 18) for wind power generation, comprising:

• at least three floaters (11, 11/101 or 103) and three connection beams (13), each beam (13) arranged between adjacent floaters (11, 11/101 or 103),
• at least three wind turbines (17, 18) each being supported on a corresponding floater (11, 11/101 or 103), each wind turbine subject to a wind load, and
• a rotation axle (150, 503) fixed to the seabed (2) and adapted to restrain the platform from drifting away while permitting rotation, wherein
• a wind load resultant of the three wind loads on the turbines (17, 18), due to a horizontal wind, does not pass through the center of geometry (C.Geo) and the rotation axle (150, 503) simultaneously,
• a yaw moment is created to turn the platform until the wind load resultant passes through the C.Geo and the rotation axle (150, 503),
• the at least three wind turbines (17, 18) are oriented in a direction facing the wind and are divided into two rows along the wind facing direction, a front row and a back row, the front row being hit by the incoming wind first,
• the front and rear turbine rows (17, 18) have differing respective tower cross sectional shapes (19, 20), and
• by manipulating different wind drag coefficients between the front and rear rows of tower cross sectional shapes (19, 20), the wind load resultant acting at the C.Geo will not fall in the rotation axle (150, 503) which is at or close to the C.G. of the platform, with a yaw moment being created by the wind load resultant acting on the C.Geo to turn the platform, until the wind load resultant passes through the C.Geo and the rotation axle (150, 503).