大功率风力发电机在独立变桨控制下的振动研究

Research on vibration of higher-power wind turbine in individual pitch control

在传统变桨距控制策略的基础上,提出基于线性二次型调节(LQR)和干扰自适应控制(DAC)技术的独立变桨控制策略。基于FAST和Matlab/Simulink软件平台对提出的控制策略与传统的变桨控制策略进行仿真比较。对1台5 MW机组进行仿真研究。研究结果表明:通过独立变桨,风力机结构的各项振动加速度幅值均有较大程度下降,能有效降低风力发电机振动以及系统结构的等效疲劳载荷,进而提高设备可靠性和延长设备使用寿命。

Based on the tradition method of pitch control, an individual pitch control strategy was proposed by combining the linear quadratic regulator（LQR） and the disturbance accommodating control（DAC）. Then, this control strategy was simulated under the environment of FAST and Matlab/Simulink software and compared with the traditional one. The simulation on a 5 MW system was made. The results show the superiority of individual pitch control in vibration control of large scale wind turbine, which can effectively reduce the fatigue load and vibration of wind turbines, and in turn improve equipment reliability and extend equipment life, reduce maintenance costs.