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    IMPROVEMENTS RELATING TO WIND TURBINES
    43.
    发明公开
    IMPROVEMENTS RELATING TO WIND TURBINES 有权
    VERBESSERUNGEN一个WINDTBINEN

    公开(公告)号：EP2999881A1

    公开(公告)日：2016-03-30

    申请号：EP14725959.2

    申请日：2014-05-21

    Applicant: Vestas Wind Systems A/S

    Inventor： OLESEN, Ib Svend

    IPC: F03D13/00 ,  F03D1/06 ,  F03D7/02

    CPC classification number: F03D1/0675 ,  F03D7/0228 ,  F03D17/00 ,  F05B2240/30 ,  F05B2260/72 ,  F05B2270/1033 ,  F05B2270/1095 ,  F05B2270/328 ,  F05B2270/804 ,  Y02E10/721 ,  Y02E10/723

    Abstract: The present invention relates to a method and to a wind turbine for determining the tip angle of a blade of a wind turbine rotor during rotation of the rotor. The method comprising: (a) transmitting a light signal from a first blade of the wind turbine rotor towards a second blade of the rotor; (b) receiving the light signal at the second blade of the rotor; and (c) calculating the tip angle of the first or second blade based upon characteristics of the received light signal.

    Abstract translation: 本发明涉及一种用于在转子旋转期间确定风力涡轮机转子的叶片的尖角的方法和风力涡轮机。 该方法包括：（a）将来自风力涡轮机转子的第一叶片的光信号传递到转子的第二叶片; （b）在转子的第二叶片处接收光信号; 和（c）基于所接收的光信号的特性来计算第一或第二叶片的尖端角度。

    OPTIMISATION OF POWER PRODUCTION IN A WIND TURBINE AT BELOW RATED POWER
    44.
    发明公开
    OPTIMISATION OF POWER PRODUCTION IN A WIND TURBINE AT BELOW RATED POWER 有权
    EINER WINDTURBINE BEI EINER LEISTUNG UNTER DER NENNLEISTUNG的OPTIMIERUNG DER LEISTUNGSERZEUGUNG

    公开(公告)号：EP2798203A1

    公开(公告)日：2014-11-05

    申请号：EP12810045.0

    申请日：2012-12-13

    Applicant: Vestas Wind Systems A/S

    Inventor： ANDERSEN, Asger Svenning ,  THOMSEN, Jesper Sandberg ,  KRISTOFFERSEN, Jacob Krogh ,  OLESEN, Ib Svend ,  ROMBLAD, Jonas

    IPC: F03D7/04 ,  F03D7/02 ,  F03D11/00

    CPC classification number: F03D7/0256 ,  F03D7/0224 ,  F03D7/042 ,  F03D7/046 ,  F03D17/00 ,  Y02E10/723

    Abstract: The rotor blades of a wind turbine each have a plurality of fiber-optic pressure variation sensors which can detect the onset of a stall condition. The output of the stall condition sensors is input to a stall count circuit which increases a stall count signal each time a stall indication is received. The stall count signal is decayed exponentially over time and the current signal is summed with the decayed signal from a previous sampling period to form a value from which a stall margin is determined. An λ:θ curve of tip speed to wind speed ratio λ against pitch angle reference θ is then determined from the stall margin.

    Abstract translation: 风力涡轮机的转子叶片每个都具有多个光纤压力变化传感器，其可以检测失速状态的开始。 失速状况传感器的输出被输入到失速计数电路，每当接收到失速指示时，增加失速计数信号。 失速计数信号随时间呈指数衰减，并且将当前信号与来自先前采样周期的衰减信号相加以形成确定失速余量的值。 一个λ：＆thetas; 尖端速度与风速比λ相对于俯仰角参考曲线的曲线; 然后从失速边界确定。

    DETECTING BLADE STRUCTURE ABNORMALITIES
    46.
    发明授权
    DETECTING BLADE STRUCTURE ABNORMALITIES 有权
    检测刀片结构异常

    公开(公告)号：EP2956663B1

    公开(公告)日：2018-04-11

    申请号：EP13707540.4

    申请日：2013-02-14

    Applicant: Vestas Wind Systems A/S

    Inventor： EHSANI, Saed ,  MIRANDA, Erik Carl Lehnskov ,  OLESEN, Ib Svend ,  SØRENSEN, Martin Møller

    IPC: F03D17/00

    CPC classification number: F01D21/003 ,  F01D21/14 ,  F03D17/00 ,  F05B2270/331 ,  F05B2270/332 ,  F05B2270/708

    Abstract: To identify abnormal behavior in a turbine blade, a failure detection system generates a “fingerprint” for each blade on a turbine. The fingerprint may be a grouping a dynamic, physical characteristics of the blade such as its mass, strain ratio, damping ratio, and the like. While the turbine is operating, the failure detection system receives updated sensor information that is used to determine the current characteristics of the blade. If the current characteristics deviate from the characteristics in the blade's fingerprint, the failure detection system may compare the characteristics of the blade that deviates from the fingerprint to characteristics of another blade on the turbine. If the current characteristics of the blade are different from the characteristics of the other blade, the failure detection system may change the operational mode of the turbine such as disconnecting the turbine from the utility grid or stopping the rotor.

    DETECTING BLADE STRUCTURE ABNORMALITIES
    49.
    发明公开
    DETECTING BLADE STRUCTURE ABNORMALITIES 有权
    断层在一个健全的结构检测

    公开(公告)号：EP2956663A1

    公开(公告)日：2015-12-23

    申请号：EP13707540.4

    申请日：2013-02-14

    Applicant: Vestas Wind Systems A/S

    Inventor： EHSANI, Saed ,  MIRANDA, Erik Carl Lehnskov ,  OLESEN, Ib Svend ,  SØRENSEN, Martin Møller

    IPC: F03D11/00

    CPC classification number: F01D21/003 ,  F01D21/14 ,  F03D17/00 ,  F05B2270/331 ,  F05B2270/332 ,  F05B2270/708

    Abstract: To identify abnormal behavior in a turbine blade, a failure detection system generates a “fingerprint” for each blade on a turbine. The fingerprint may be a grouping a dynamic, physical characteristics of the blade such as its mass, strain ratio, damping ratio, and the like. While the turbine is operating, the failure detection system receives updated sensor information that is used to determine the current characteristics of the blade. If the current characteristics deviate from the characteristics in the blade's fingerprint, the failure detection system may compare the characteristics of the blade that deviates from the fingerprint to characteristics of another blade on the turbine. If the current characteristics of the blade are different from the characteristics of the other blade, the failure detection system may change the operational mode of the turbine such as disconnecting the turbine from the utility grid or stopping the rotor.

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