基于电磁阻尼的风电机组偏航系统

Yaw System for Wind Turbines Based on Electromagnetic Damping

海上风力发电机组采用液压阻尼偏航方法时,在偏航过程中由偏航电机驱动的同时,需要液压刹车部分投入以提供阻尼使机舱保持平稳,此过程中刹车片与制动盘之间产生的滑动摩擦会导致刹车片磨损、机舱振动、噪声加剧等一系列问题。文章论述了偏航过程中一种采用偏航电机提供电磁阻尼取代偏航动作过程中的液压刹车制动的电磁阻尼偏航系统。风电机组采用变频器控制偏航电机动作,完成偏航过程。采用电磁阻尼偏航系统能有效避免液压阻尼偏航系统的刹车片磨损,降低偏航系统维护频率,有效降低偏航过程中的机舱振动及机械噪声。

When offshore wind turbines adopt hydraulic damping yaw method,yaw of offshore wind turbines are usually driven by yaw motors,the hydraulic brake is required to provide damping to keep the cabin stable during yaw process.And strong sliding friction between the brake pads and the brake discs results in the abrasion of the brake pads,vibration of cabin,noise and other adverse factors.A yaw system using motor to provide electromagnetic damping instead of hydraulic brake during yaw operation is discussed.The main controller is used to control the yaw motor through the frequency converter to complete the yaw process.This yaw system can effectively avoid the brake pad wear,and reduce the maintenance frequency of yaw system,and it also can reduce the vibration of cabin and mechanical noise during the yaw process.