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    SYSTEM AND METHOD FOR REDUCING ROTOR LOADS IN A WIND TURBINE UPON DETECTION OF BLADE-PITCH FAILURE AND LOSS OF COUNTER-TORQUE
    1.
    发明申请
    SYSTEM AND METHOD FOR REDUCING ROTOR LOADS IN A WIND TURBINE UPON DETECTION OF BLADE-PITCH FAILURE AND LOSS OF COUNTER-TORQUE 有权
    用于在风轮机中减少转子负载的系统和方法，用于检测叶片故障和扭矩损失

    公开(公告)号：US20090243295A1

    公开(公告)日：2009-10-01

    申请号：US12060833

    申请日：2008-04-01

    Applicant: Leonardo Cesar Kammer ,  Axel Braicks ,  Hubert Oing

    Inventor： Leonardo Cesar Kammer ,  Axel Braicks ,  Hubert Oing

    IPC: F03D9/00 ,  F03D7/00

    CPC classification number: F03D7/0264 ,  F03D7/0224 ,  F03D7/0228 ,  F03D7/0244 ,  F03D7/043 ,  F05B2260/80 ,  F05B2270/1011 ,  F05B2270/107 ,  F05B2270/337 ,  Y02E10/723 ,  Y02P80/158

    Abstract: A system and method for reducing rotor loads in a wind turbine that includes a brake and one or more rotor blades coupled to a rotor. Upon detection of a loss of counter torque and a blade-pitch failure in at least one rotor blade, a processor reduces a generator overspeed threshold value by a predetermined amount and determines a brake-release threshold value. The brake is applied to slow the rotor if the generator/rotor speed exceeds the reduced generator/rotor overspeed threshold value. In addition, the brake is applied to slow the rotor until the generator/rotor speed is below the brake-release threshold value. The rate of change of the pitch angle of the rotor blade may be varied as the blade moves toward feather in response to the detected blade-pitch failure.

    Abstract translation: 一种用于减小风力涡轮机中的转子负载的系统和方法，其包括制动器和联接到转子的一个或多个转子叶片。 当检测到至少一个转子叶片中的反扭矩损失和叶片间距失效时，处理器将发电机超速阈值减小预定量并确定制动释放阈值。 如果发电机/转子转速超过减速发电机/转子超速阈值，则施加制动以减慢转子。 此外，施加制动以减慢转子直到发电机/转子速度低于制动释放阈值。 当叶片响应于检测到的叶片间距失效而朝向羽毛移动时，转子叶片的桨距角的变化率可以变化。

    APPARATUS AND METHOD FOR REDUCING ASYMMETRIC ROTOR LOADS IN WIND TURBINES DURING SHUTDOWN
    4.
    发明申请
    APPARATUS AND METHOD FOR REDUCING ASYMMETRIC ROTOR LOADS IN WIND TURBINES DURING SHUTDOWN 有权
    减速期间风力涡轮机中不对称转子负载的装置和方法

    公开(公告)号：US20090148286A1

    公开(公告)日：2009-06-11

    申请号：US11952073

    申请日：2007-12-06

    Applicant: Leonardo Cesar Kammer ,  Hubert Oing

    Inventor： Leonardo Cesar Kammer ,  Hubert Oing

    IPC: F03D7/04 ,  F03D9/00 ,  F03D7/00 ,  F03D11/00

    CPC classification number: F03D7/024 ,  F03D7/0224 ,  F03D7/0264 ,  F03D7/043 ,  F05B2270/328 ,  Y02E10/723

    Abstract: 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.

    Abstract translation: 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。

    Apparatus and method for reducing asymmetric rotor loads in wind turbines during shutdown
    7.
    发明授权
    Apparatus and method for reducing asymmetric rotor loads in wind turbines during shutdown 有权
    关闭期间降低风力发电机不对称转子负载的装置和方法

    公开(公告)号：US08240990B2

    公开(公告)日：2012-08-14

    申请号：US11952073

    申请日：2007-12-06

    Applicant: Leonardo Cesar Kammer ,  Hubert Oing

    Inventor： Leonardo Cesar Kammer ,  Hubert Oing

    IPC: F03D7/04 ,  B63H3/00

    CPC classification number: F03D7/024 ,  F03D7/0224 ,  F03D7/0264 ,  F03D7/043 ,  F05B2270/328 ,  Y02E10/723

    Abstract: 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.

    Abstract translation: 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。

    System and method for reducing rotor loads in a wind turbine upon detection of blade-pitch failure and loss of counter-torque
    9.
    发明授权
    System and method for reducing rotor loads in a wind turbine upon detection of blade-pitch failure and loss of counter-torque 有权
    在检测到叶片间距失效和失去反扭矩时，减小风力涡轮机中的转子负载的系统和方法

    公开(公告)号：US07944067B2

    公开(公告)日：2011-05-17

    申请号：US12060833

    申请日：2008-04-01

    Applicant: Leonardo Cesar Kammer ,  Axel Braicks ,  Hubert Oing

    Inventor： Leonardo Cesar Kammer ,  Axel Braicks ,  Hubert Oing

    IPC: F03D9/00 ,  H02P9/04

    CPC classification number: F03D7/0264 ,  F03D7/0224 ,  F03D7/0228 ,  F03D7/0244 ,  F03D7/043 ,  F05B2260/80 ,  F05B2270/1011 ,  F05B2270/107 ,  F05B2270/337 ,  Y02E10/723 ,  Y02P80/158

    Abstract: A system and method for reducing rotor loads in a wind turbine that includes a brake and one or more rotor blades coupled to a rotor. Upon detection of a loss of counter torque and a blade-pitch failure in at least one rotor blade, a processor reduces a generator overspeed threshold value by a predetermined amount and determines a brake-release threshold value. The brake is applied to slow the rotor if the generator/rotor speed exceeds the reduced generator/rotor overspeed threshold value. In addition, the brake is applied to slow the rotor until the generator/rotor speed is below the brake-release threshold value. The rate of change of the pitch angle of the rotor blade may be varied as the blade moves toward feather in response to the detected blade-pitch failure.

    Abstract translation: 一种用于减小风力涡轮机中的转子负载的系统和方法，其包括制动器和联接到转子的一个或多个转子叶片。 当检测到至少一个转子叶片中的反扭矩损失和叶片间距失效时，处理器将发电机超速阈值减小预定量并确定制动释放阈值。 如果发电机/转子转速超过减速发电机/转子超速阈值，则施加制动以减慢转子。 此外，施加制动以减慢转子直到发电机/转子速度低于制动释放阈值。 当叶片响应于检测到的叶片间距失效而朝向羽毛移动时，转子叶片的桨距角的变化率可以变化。

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