Floating platform effects on power generation in spar and semisubmersible wind turbines

The design and financing of commercial-scale floating offshore wind projects require a better understanding how power generation differs between newer turbines well-established fixed-bottom turbines. In turbines, platform mobility causes additional rotor motion that can change the time-averaged generation. this work, OpenFAST simulations examine generated by National Renewable Energy Laboratory's 5-MW reference turbine mounted on OC3-UMaine spar OC4-DeepCWind semisubmersible platforms, subjected to extreme irregular waves below-rated turbulent inflow from large-eddy neutral atmospheric boundary layer. For these conditions, average in is most affected two types displacements: an pitch angle reduces power, caused pitch; upwind-downwind increases surge pitch. relative balance effects determines whether gains or losses compared turbine; for example, creates modest (3.1%–4.5%) gains, whereas insignificant (0.1%–0.2%) simulated conditions. Furthermore, motions must be analyzed concurrently fully capture which not yet universal practice. Finally, simple analytical model predicting under speeds proposed, incorporating both displacement dynamic displacements.