考虑扭转速度预估的大型风电机组传动链扭振抑制方法

Torsional vibration suppression method of large-scale wind turbine drivetrain considering torsional speed prediction

大型风电机组传动链转动惯量大,在随机风速作用下低频扭振风险高,而传统基于确定扭转速度控制目标的传动链扭振控制方法未考虑因测量设备引起的随机测量噪声对扭转速度的影响,可能导致控制性能下降。针对扭转速度测量不确定性,提出了大型风电机组传动链扭振自抗扰控制方法,设计了KF-ADRC扭振控制器,通过卡尔曼滤波动态估计传动链扭转速度,并以扭转速度为零作为ADRC控制目标,控制发电机电磁转矩,抑制传动链低频扭振。研究结果表明:当常规的扭振控制器输入信号存在随机测量噪声时,会显著降低其对传动链低频扭振的抑制性能,而KF-ADRC扭振控制器在输入信号存在测量噪声时可有效预估传动链扭转速度,较好地实现了传动链低频扭振抑制效果。

The drivetrain of high-power wind turbines has a large moment of inertia,resulting in a high risk of low-frequency torsional vibration when subjected to random wind speeds.The traditional torsional vibration control method for the drivetrain based on the determination of the torsional speed control target fails to consider the influence of the random measurement noise introduced by the measurement equipment on the torsional speed.This oversight can lead to a decrease in control performance.To address the uncertainty associated with torsion speed measurement,this paper proposed an active disturbance rejection control method for torsional vibration of large-scale wind turbine drivetrain.A KF-ADRC torsional vibration controller was designed which dynamically estimated the torsion speed of drivetrain using a Kalman filter. The ADRC control target was set as zero torsion speed to regulate the electromagnetic torque of the generator and suppress low-frequency torsional vibration in the drivetrain. The research results show that when the input signal of the conventional torsional vibration controller has random measurement noise, it will significantly reduce its performance. In contrast, the KF-ADRC torsional vibration controller can effectively predict the drivetrain’s torsional speed and achieve superior suppression of the low-frequency torsional vibration in the drivetrain.