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    SPEED MANAGEMENT OF A WIND TURBINE WHEN SWITCHING ELECTRICAL CONFIGURATIONS
    21.
    发明公开
    SPEED MANAGEMENT OF A WIND TURBINE WHEN SWITCHING ELECTRICAL CONFIGURATIONS 审中-公开
    GESCHWINDIGKEITSVERWALTUNG EINER WINDTURBINE BEIM UMSCHALTEN ELEKTRISCHER KONFIGURATIONEN

    公开(公告)号：EP3042075A1

    公开(公告)日：2016-07-13

    申请号：EP14766898.2

    申请日：2014-09-03

    Applicant: Vestas Wind Systems A/S

    Inventor： KJÆR, Martin Ansbjerg ,  KOLDKJÆR, Peter ,  MØLGAARD HVIID KNUDSEN, Rasmus ,  SOLEIMANZADEH, Maryam ,  SØRENSEN, Martin Møller ,  ZAIB, Ali ,  KUMAR SINGH, Arvishwa ,  CHRISTENSEN, Poul Brandt ,  HOULIND JENSEN, Michael

    IPC: F03D7/02 ,  F03D7/04

    CPC classification number: F03D7/028 ,  F03D1/06 ,  F03D7/0272 ,  F03D7/042 ,  F03D7/047 ,  F03D9/25 ,  F05B2270/332 ,  G05F1/66 ,  Y02E10/721 ,  Y02E10/723

    Abstract: To efficiently nm a wind turbine in varying wind speeds, the wind turbine may be configured to switch between two different electrical configurations that offer different efficiencies depending on wind speed. For example, a star configuration may be preferred during low wind speeds while a delta configuration is preferred for high wind speeds. Before switching, the power output by the turbine's generator may be driven to zero. Doing so, however, removes load from the rotor blades which cause the rotor speed to increase. Instead, the rotor speed may be controlled such that the speed stays at or above the speed of the rotor immediately before the generator power is ramped down. Maintaining rotor speed at or slightly above the current speed while switching between electrical configurations may mitigate the torque change experienced by the turbine and reduce the likelihood of structural failure.

    Abstract translation: 为了有效地在不同的风速下对风力涡轮机进行nm，风力涡轮机可以被配置为在根据风速提供不同效率的两种不同的电气配置之间切换。 例如，在低风速期间，星形结构可能是优选的，而对于高风速而言，优选配置delta配置。 在切换之前，涡轮发电机输出的功率可能被驱动到零。 然而，这样做可以消除转子叶片的负载，导致转子转速增加。 相反，可以控制转子速度，使得在发电机功率下降之前，转速保持等于或高于转子的速度。 在转换电气配置之前，将转子速度保持在或略高于当前速度可以减轻涡轮机所经历的扭矩变化，并降低结构故障的可能性。

    A METHOD OF OPERATING A WIND TURBINE AS WELL AS A SYSTEM SUITABLE THEREFORE
    22.
    发明公开
    A METHOD OF OPERATING A WIND TURBINE AS WELL AS A SYSTEM SUITABLE THEREFORE 有权
    VERFAHREN ZUM BETREIBEN EINER WINDTURBINE SOWIE系统DAFÜR

    公开(公告)号：EP2859225A1

    公开(公告)日：2015-04-15

    申请号：EP13730475.4

    申请日：2013-06-07

    Applicant: Vestas Wind Systems A/S

    Inventor： ATZLER, Martin ,  BRATH, Per ,  KRÜGER, Thomas ,  ZAIB, Ali

    IPC: F03D7/02 ,  F03D7/04

    CPC classification number: F03D7/044 ,  F03D7/0224 ,  F03D7/024 ,  F03D7/0296 ,  F03D7/043 ,  F05B2260/966 ,  F05B2270/331 ,  Y02E10/723

    Abstract: A method of operating a wind turbine is provided. The wind turbine comprises a turbine rotor with at least two blades, each blade having a variable pitch angle. The method comprises determining mechanical loads on the blades, determining an asymmetric load moment experienced by the turbine rotor based on the mechanical loads on the blades, determining high order harmonics from the asymmetric load moment, and determining an individual pitch control signal for each of the blades for varying the pitch angle of each blade to compensate for the asymmetric load moment. The individual pitch control signal for each blade is determined at least based on the high order harmonics.

    Abstract translation: 提供了一种操作风力涡轮机的方法。 风力涡轮机包括具有至少两个叶片的涡轮转子，每个叶片具有可变的桨距角。 该方法包括确定叶片上的机械载荷，基于叶片上的机械负载确定涡轮转子经历的不对称载荷力矩，从不对称载荷力矩确定高次谐波，以及确定各个桨距控制信号 用于改变每个叶片的桨距角以补偿不对称负载力矩的叶片。 至少基于高次谐波来确定每个叶片的各个俯仰控制信号。

    A METHOD OF OPERATING A WIND TURBINE AS WELL AS A SYSTEM SUITABLE THEREFORE
    26.
    发明授权
    A METHOD OF OPERATING A WIND TURBINE AS WELL AS A SYSTEM SUITABLE THEREFORE 有权
    操作风力涡轮机的方法以及适合的系统

    公开(公告)号：EP2859225B1

    公开(公告)日：2017-09-27

    申请号：EP13730475.4

    申请日：2013-06-07

    Applicant: Vestas Wind Systems A/S

    Inventor： ATZLER, Martin ,  BRATH, Per ,  KRÜGER, Thomas ,  ZAIB, Ali

    IPC: F03D7/02 ,  F03D7/04

    CPC classification number: F03D7/044 ,  F03D7/0224 ,  F03D7/024 ,  F03D7/0296 ,  F03D7/043 ,  F05B2260/966 ,  F05B2270/331 ,  Y02E10/723

    Abstract: A method of operating a wind turbine is provided. The wind turbine comprises a turbine rotor with at least two blades, each blade having a variable pitch angle. The method comprises determining mechanical loads on the blades, determining an asymmetric load moment experienced by the turbine rotor based on the mechanical loads on the blades, determining high order harmonics from the asymmetric load moment, and determining an individual pitch control signal for each of the blades for varying the pitch angle of each blade to compensate for the asymmetric load moment. The individual pitch control signal for each blade is determined at least based on the high order harmonics.

    Abstract translation: 提供了一种操作风力涡轮机的方法。 风力涡轮机包括具有至少两个叶片的涡轮机转子，每个叶片具有可变节距角。 该方法包括确定叶片上的机械负载，基于叶片上的机械负载来确定涡轮机转子经历的不对称负载力矩，根据不对称负载力矩确定高次谐波，并且确定用于每个叶片的单独桨距控制信号 叶片用于改变每个叶片的桨距角以补偿不对称的负载力矩。 至少基于高次谐波来确定每个叶片的各个桨距控制信号。

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