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- 2015
最大功率跟踪控制下大型风电机组的轴系扭振分析及抑制
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Abstract:
随着风电机组向大型化和轻量化发展,机组传动轴扭振现象加剧,风机轴系扭振的研究变得越来越重要。该文分析了3种常用的风机最大功率跟踪控制方法下系统轴系扭振模态,发现利用发电机转速反馈的不同控制方法,都能够提升传动轴阻尼。据此提出了一种最大功率跟踪控制的改进方法,该方法在原有转矩指令的基础上叠加了传动轴扭振抑制指令,在保证最大功率跟踪的同时抑制了风机传动轴扭振。通过软件仿真,验证了上述理论分析以及改进方法的有效性。
Abstract：As wind turbines become larger and lighter, they are experiencing more severe shaft torsional vibrations. Therefore, the suppression of turbine shaft torsional vibrations is becoming more important. This paper compares three common maximum power point tracking(MPPT) control algorithms. All three methods use generator speed feedback to enhance the drive shaft damping. An advanced conventional MPPT control method was then developed with an extra order added to the MPPT command to suppress shaft torsional vibrations. The result suppresses the torsion vibrations of the drive shaft, while ensuring that the wind turbines work at the maximum power point. Simulations verify the effectiveness of the theoretical analyses and this method.
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