海上浮式风电机组变桨距自抗扰控制策略研究

为有效抑制由随机风、浪载荷引起的海上浮式风电机组发电功率波动,提出了变桨距线性自抗扰控制(LADRC)策略。综合考虑气动力、水动力、结构弹性和变桨距控制等影响因素,建立5 MW级海上浮式风电机组气弹水控耦合系统动力学模型,基于恒转矩控制目标设计变桨距线性自抗扰控制器,分别采用带宽整定法和BP神经网络整定法对控制器参数进行整定,对比分析变桨距线性自抗扰控制对发电功率波动的抑制效果。研究结果表明:采用带宽整定和BP神经网络整定的变桨距线性自抗扰控制可以有效地改善海上浮式风电机组变桨距灵敏度,抑制发电功率波动。

Research on ADRC for pitch control of offshore floating wind turbine

In order to effectively suppress the power fluctuations of the offshore floating wind turbine caused by the random wind and wave loads, a pitch active disturbance rejection control (ADRC) strategy was proposed. Considering aerodynamics, hydrodynamics, structure flexibility and pitch control, an aero-elastic-hydro-servo coupling dynamic model for the 5 MW offshore floating wind turbine was established. Pitch ADRC controller was designed based on the target of the constant torque control, in which the bandwidth setting method and BP neural network were used to set controller parameters. The suppression effects of the pitch ADRC on the power fluctuations were analyzed. The results show that the pitch ADRC based on bandwidth tuning and BP neural network tuning can effectively improve the pitch sensitivity and suppress the power fluctuation, and the fluctuation amplitude is reduced compared with the traditional PID control.