Coupled dynamic characteristics of 10 MW semi-submersible offshore wind turbine under typical operation, extreme, and fault conditions

The Technical University of Denmark (DTU) 10 MW wind turbine is selected as the object this study. braceless semi-submersible platform for National Renewable Energy Laboratory 5 upscaled to support DTU turbine. servo control system redesigned. Furthermore, torque performed below rated speed achieve maximum power capture, and gain scheduling proportional integral (GSPI) method above realize design variable propeller system. This ensures safe operation floating speed. reliability designed verified by a full coupling dynamic response analysis with system, aerodynamics, hydrodynamics under combined action waves. coupled characteristics different conditions are analyzed, including operational, extreme, fault situations. results show that effectively controls motion offshore (FOWT). Turbulent has an obvious excitation effect on surge pitch FOWT, whereas heave primarily excited wave loads. Different can cause structural responses. tower top bending moment greatly affected imbalance aerodynamic load, surge, motion, base moment, mooring tension FOWT varying degrees. In addition, generally barely conditions.