中文摘要：

风电机组发电机转矩控制不仅直接决定机组的最大功率追踪效果,而且对传动系统疲劳载荷有明显影响。风电机组发电过程时刻受到风速的扰动,而且机组传动系统具有明显的非线性特性。本文设计了一种非线性转矩控制器,在计算出最优转速后,对风电机组转矩进行控制跟踪最优转速。在考虑机组传动系统柔性的情况下,实现最大功率追踪的同时可减小传动系统疲劳载荷。在FAST软件中针对5MW风电机组仿真,结果表明该方法能够很好地追踪最大功率,且相对传统PI控制输出的功率更加稳定平滑,对传动系统载荷有一定的改善。

英文摘要：

Torque control in the wind turbine determines directly the effect of the maximum power point tracking,and it has a significant effect on fatigue load in the drive train. In this paper,a nonlinear torque controller is designed to control torque because of wind disturbance and obvious nonlinearity in the drive train. By considering the flexibility of drive train case,the maximum power point tracking and reducing of load are realized. In FAST software,it is simulated for a 5MW wind turbine,and the results illustrate that the effect of the maximum power point tracking and reducing of load is better when using nonlinear controller than the effect of using PI.