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    • 4. 发明授权
    • Apparatus and method for reducing asymmetric rotor loads in wind turbines during shutdown
    • 关闭期间降低风力发电机不对称转子负载的装置和方法
    • US08240990B2
    • 2012-08-14
    • US11952073
    • 2007-12-06
    • Leonardo Cesar KammerHubert Oing
    • Leonardo Cesar KammerHubert Oing
    • F03D7/04B63H3/00
    • F03D7/024F03D7/0224F03D7/0264F03D7/043F05B2270/328Y02E10/723
    • An apparatus and method for reducing asymmetric rotor load in a wind turbine includes calculating a time delay for pitching each blade toward feather upon initiation of a shutdown condition. The blades with the larger blade angle begin moving toward feather with an initial pitch rate, while the blade with the smallest blade angle begins moving toward feather with a final pitch rate. Once all the blades have reached approximately an identical blade angle, the blades move simultaneously together to feather at the final pitch rate. By introducing the time delay for pitching the blades having higher blade angles at the final pitch rate, a simple, time-based correction of initial conditions during shutdown reduces the extreme loads on turbine components.
    • 用于减小风力涡轮机中的不对称转子负载的装置和方法包括计算在关闭状态开始时将每个叶片俯仰的时间延迟。 具有较大叶片角度的叶片以初始俯仰速率开始向羽毛移动,而具有最小叶片角度的叶片以最终俯仰速率开始向羽毛移动。 一旦所有叶片已经达到大致相同的叶片角度,叶片同时移动到一起以最终俯仰速率羽毛。 通过引入用于以最终俯仰速率俯仰具有较高叶片角度的叶片的时间延迟,在关机期间对初始条件的简单的基于时间的校正减少了涡轮机部件上的极限载荷。
    • 10. 发明申请
    • METHOD OF ROTOR-STALL PREVENTION IN WIND TURBINES
    • 风力涡轮机转子预防方法
    • US20130259682A1
    • 2013-10-03
    • US13430930
    • 2012-03-27
    • Leonardo Cesar Kammer
    • Leonardo Cesar Kammer
    • F03D7/04F03D1/00
    • F03D7/0224F03D7/0244F03D7/0256Y02E10/723
    • A method for operating a wind turbine is based on providing a wind turbine that includes a control system programmed to adjust a blade pitch angle of one or more rotor blades without knowledge of rotor blade efficiency. A blade pitch angle of one or more rotor blades is adjusted in response to the current conditions experienced by the wind turbine to provide a blade pitch angle that is greater than or equal to a blade pitch angle necessary to maintain a predetermined minimum rotor stall margin according to modeled aerodynamic performance of the rotor blades such that continuous operation of the wind turbine is maintained without transitions to the stalled mode.
    • 一种用于操作风力涡轮机的方法是基于提供一种风力涡轮机,该风力涡轮机包括编程为在不知道转子叶片效率的情况下调节一个或多个转子叶片的叶片俯仰角的控制系统。 响应于风力涡轮机经历的当前状况来调节一个或多个转子叶片的叶片桨距角,以提供大于或等于维持预定的最小转子失速余量所需的叶片桨距角的叶片桨距角 以模拟转子叶片的空气动力学性能,使得维持风力涡轮机的连续操作而不过渡到失速模式。