关键词: 独立变桨, 风剪, 漂浮式风力发电机, 状态估计器, 线性二次型调节器（LQR）

Abstract: Along with the increases of the tower height and blade size of wind turbine, the influence of wind shear effect on the performance of wind turbine becomes more and more important. Therefore, this paper proposed the individual pitch control strategy based on wind shear effect. The support structure dynamics model of floating wind turbine was analyzed. Combined with the individual pitch control strategy for onshore wind turbine based on wind shear, the individual pitch controllers for three different floating wind turbines were designed with using linear quadratic regulator （LQR） technology. Simulation model was built in MATLAB/SIMULINK software and was co-simulated with FAST software. The simulation results show that the proposed individual pitch control strategy has different influences on the power and pitch motions of these three types wind turbines. The individual control strategy can significantly reduce the power fluctuations of spar-buoy floating wind turbine, but it’s not obvious to tension leg and barge floating wind turbines. For the pitch motion of floating wind turbine, the influences of individual and uniform pitch control strategy on spar-buoy and tension leg floating wind turbines have not obvious differences, but for barge wind turbine, the platform pitch angle will become larger when using individual pitch control strategy.

Key words: individual pitch, wind shear, floating wind turbine, state estimator, linear quadratic regulator（LQR）