周期的最適サーボ制御を用いた浮体式洋上風力発電のための個別ブレードピッチ角制御

抄録

Periodic linear quadratic integrator control is applied to the individual blade pitch angle control of floating offshore turbine to reduce fatigue load as well as to improve power output. A methodology for selecting weighting matrices of optimal control is discussed in detail; in particular, the optimization of the phase parameter in the periodic input weighting matrix results in synchronization with the operating point of blade flapwise bending mode. The proposed method is applied to the NREL 5 MW wind turbine model and shows the reduction in blade flapwise bending compared with the averaged linear quadratic integrator.