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公开(公告)号：US10662924B2
公开(公告)日：2020-05-26
申请号：US15037902
申请日：2014-11-19
摘要： The invention relates to a control apparatus and method for controlling the rotor blades of a wind turbine, and in particular to controlling the rotor blades during an extreme wind event. An extended mode of operation of the wind turbine rotor beyond the cut-out wind speed is provided. In the extended mode of operation, the pitch of the wind turbine blades is actively controlled so that the rotor and the generator idle at a designated rotational speed. The rotational speed may be relatively high, say 15 to 20% of the nominal speed, compared with minimal speeds experienced by purely feathered wind turbine blades, and may be further controlled as a function of the incident wind speed. Output power control in the extended mode may be zero but is preferably a low, but non-zero value. The output power so produced may then be used as an auxiliary power source for controlling the wind turbine in situations where the utility grid fails.
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公开(公告)号：US20150132128A1
公开(公告)日：2015-05-14
申请号：US14404159
申请日：2013-06-06
CPC分类号： F03D7/0224 , F03D7/024 , F03D7/042 , F03D7/043 , F05B2260/966 , F05B2270/331 , G05B13/0205 , Y02E10/723
摘要： The invention provides a wind turbine, a control system for a wind turbine and a method for controlling a wind turbine where asymmetry in load on the rotor is compensated by individual pitching by comparing a load distribution over the rotor plane with a threshold value. To avoid unnecessary compensation, the threshold value is adjusted based on a loading of the wind turbine or based on climate conditions under which the turbine operates.
摘要翻译： 本发明提供了一种风力涡轮机，用于风力涡轮机的控制系统和用于控制风力涡轮机的方法，其中通过将转子平面上的负载分布与阈值进行比较，通过单独俯仰来补偿转子上的负载的不对称性。 为了避免不必要的补偿，基于风力涡轮机的负载或基于涡轮机运行的气候条件来调整阈值。
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公开(公告)号：US10378513B2
公开(公告)日：2019-08-13
申请号：US14916618
申请日：2014-09-03
发明人： Martin Ansbjerg Kjær , Peter Koldkjær , Rasmus Molgaard Hviid Knudsen , Maryam Soleimanzadeh , Martin Møller Sørensen , Ali Zaib , Arvishwa Kumar Singh , Poul Brandt Christensen , Michael Houlind Jensen
摘要： 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.
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4.发明申请公开(公告)号：US20150132129A1
公开(公告)日：2015-05-14
申请号：US14406409
申请日：2013-06-07
发明人： Martin Atzler , Per Brath , Thomas Krüger , Ali Zaib
CPC分类号： F03D7/044 , F03D7/0224 , F03D7/024 , F03D7/0296 , F03D7/043 , F05B2260/966 , F05B2270/331 , Y02E10/723
摘要： 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.
摘要翻译： 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俯仰角。 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，从非对称载荷力矩确定高次谐波，以及确定每个 用于改变每个叶片的俯仰角以补偿不对称载荷力矩的叶片。 至少基于高阶谐波确定每个叶片的各个俯仰控制信号。
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公开(公告)号：US10907612B2
公开(公告)日：2021-02-02
申请号：US16088419
申请日：2017-03-30
摘要： A wind turbine control system comprising at least one control module configured to output a control signal for a control mechanism of a wind turbine, and a gain calculator for calculating a gain parameter associated with the control module, wherein the gain parameter is calculated based on a computerized real-time blade model using a determined wind turbine operating point as an input. The blade model may be a blade element momentum model. In another aspect, the invention may be expressed as a method of controlling a control mechanism of a wind turbine.
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公开(公告)号：US09970413B2
公开(公告)日：2018-05-15
申请号：US14404159
申请日：2013-06-06
CPC分类号： F03D7/0224 , F03D7/024 , F03D7/042 , F03D7/043 , F05B2260/966 , F05B2270/331 , G05B13/0205 , Y02E10/723
摘要： The invention provides a wind turbine, a control system for a wind turbine and a method for controlling a wind turbine where asymmetry in load on the rotor is compensated by individual pitching by comparing a load distribution over the rotor plane with a threshold value. To avoid unnecessary compensation, the threshold value is adjusted based on a loading of the wind turbine or based on climate conditions under which the turbine operates.
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公开(公告)号：US09835137B2
公开(公告)日：2017-12-05
申请号：US14406409
申请日：2013-06-07
发明人： Martin Atzler , Per Brath , Thomas Krüger , Ali Zaib
CPC分类号： F03D7/044 , F03D7/0224 , F03D7/024 , F03D7/0296 , F03D7/043 , F05B2260/966 , F05B2270/331 , Y02E10/723
摘要： 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.
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