公开(公告)号：US10393092B2

公开(公告)日：2019-08-27

申请号：US15919587

申请日：2018-03-13

申请人： Nordex Energy GmbH

发明人： Detlef Drossel ,  Florian Bode

IPC分类号： F03D7/04 ,  H02J3/46 ,  H02J3/38 ,  H02J3/48

摘要： A method for controlling an active power in a wind farm having at least two wind turbines that supply active power comprises inputting a setpoint value for the active power of the wind farm into a wind farm model. The wind farm model outputs a modeled active power setpoint value. A system deviation is determined and input into a power controller, which outputs a controller manipulated variable. A feedforward control manipulated variable is determined independently of states of the wind farm or the active power. An overall manipulated variable is determined for the wind farm as the sum of the controller manipulated variable and the feedforward control manipulated variable. A correction value is determined based on the difference between the actual value of the active power and the modeled active power setpoint value and input into the wind farm model.

公开(公告)号：US20190162165A1

公开(公告)日：2019-05-30

申请号：US16203237

申请日：2018-11-28

申请人： Nordex Energy GmbH

发明人： Michael Niss ,  Valeri Buller

IPC分类号： F03D7/02

摘要： A method for operating a wind turbine, includes: determining a value of a wind speed of an incident air mass at the wind turbine; if the determined value of the wind speed is greater than a first threshold value for the wind speed: reducing a rotational speed of a rotor of the wind turbine, and maintaining or increasing a generator torque acting upon the rotor; if the determined value of the wind speed is greater than a second threshold value for the wind speed, the second threshold value being greater than the first threshold value: reducing the rotational speed of the rotor, and reducing the generator torque acting upon the rotor.

公开(公告)号：US20180180576A1

公开(公告)日：2018-06-28

申请号：US15847495

申请日：2017-12-19

申请人： Nordex Energy GmbH

发明人： Ocke-Philipp Hansen ,  Stephan Boerner ,  Jan Fischer

IPC分类号： G01N29/26 ,  F16C41/00

摘要： A method for examining the raceway of a large roller bearing in a wind turbine, in which a raceway of the large roller bearing is measured using an ultrasonic measuring unit mounted on the bearing housing, wherein the ultrasonic measuring unit detects two edges of the raceway and the relative position and/or formation thereof in relation to one another is measured.

公开(公告)号：US20180138709A1

公开(公告)日：2018-05-17

申请号：US15809669

申请日：2017-11-10

申请人： Nordex Energy GmbH

发明人： Niels Hamann

IPC分类号： H02J3/24 ,  H02J3/38 ,  H02J3/18 ,  F03D7/04 ,  F03D7/02

CPC分类号： H02J3/24 ,  F03D7/0296 ,  F03D7/048 ,  F05B2220/706 ,  H02J3/18 ,  H02J3/386

摘要： A method is for damping electromechanical oscillations on a power system by injecting reactive power generated by one or more wind energy turbines, wherein a reactive power controller is adapted to determine a reference reactive power value depending on an actual system voltage. The method includes: measuring oscillation data associated with the power system, filtering the measured oscillation data to remove a steady state offset, determining a frequency value and an amplitude value from the filtered data, and triggering a damping according to at least one of the following: the frequency value determined from the filtered data falling within a predetermined frequency interval, and the amplitude value determined from the filtered data exceeding a predetermined threshold value. The damping of the electromechanical oscillations on the power system is achieved by compensating a gain and a delay applied by the reactive power controller to the reference reactive power value.

公开(公告)号：US20170268482A1

公开(公告)日：2017-09-21

申请号：US15532177

申请日：2015-12-03

申请人： NORDEX ENERGY GMBH

发明人： Lutz BEYLAND ,  Daniel NIES

IPC分类号： F03D1/06

CPC分类号： F03D1/0683 ,  F03D1/0675 ,  F05B2240/302 ,  F05B2260/301 ,  Y02E10/721

摘要： The invention relates to a segmented rotor blade for wind turbines, the segmented rotor blade having spar elements which can be telescoped into one another. According to the invention, in order to screw the telescoped spar elements together, one of the bushes is designed as a slide bush to achieve a better connection of the segmented rotor blades.

公开(公告)号：US09689377B2

公开(公告)日：2017-06-27

申请号：US14282955

申请日：2014-05-20

申请人： Nordex Energy GmbH

发明人： Hendrik Klein ,  Nick Ohlerich

IPC分类号： F03D80/30 ,  F03D80/40 ,  F03D11/00

CPC分类号： F03D80/40 ,  F03D80/30 ,  Y02E10/721 ,  Y02E10/722

摘要： A wind turbine rotor blade includes: a rotor blade root; a rotor blade tip; an electrical heating device; a first lightning receptor disposed in the region of the rotor blade tip; precisely two lightning conductors leading from the lightning receptor to the rotor blade root; a second lightning receptor arranged at a distance to the rotor blade tip and connected to one of the lightning conductors; and, each one of the two lightning conductors being electrically conductively connected to the electrical heating device at a multiplicity of points between the rotor blade root and the rotor blade tip so as to cause equipotential bonding between the two lightning conductors via the electrical heating device in response to a lightning strike to the rotor blade.

公开(公告)号：US09664177B2

公开(公告)日：2017-05-30

申请号：US14057678

申请日：2013-10-18

申请人： Nordex Energy GmbH

发明人： Ocke-Philipp Hansen

IPC分类号： F16D65/00 ,  F03D80/55 ,  F03D11/00

CPC分类号： F03D80/55 ,  F16D65/0037 ,  F16D65/0043

摘要： The invention is directed to a method for cleaning a brake of a wind turbine. The brake has a brake disc and at least one brake unit, wherein the brake disc and the brake unit can be moved relative to one another via a drive. The method includes fastening a cleaning plate to the brake disc; releasing at least one brake unit; moving the brake disc and the brake unit relative to one another so that the cleaning plate is moved past a brake pad of the brake unit while making applied contact engagement to the brake pad; and, dismounting the cleaning plate from the brake disc.

公开(公告)号：US09461572B2

公开(公告)日：2016-10-04

申请号：US14720510

申请日：2015-05-22

申请人： Nordex Energy GmbH

发明人： Christian Wessels

IPC分类号： F03D9/00 ,  H02P9/04 ,  H02P9/00 ,  H02J3/18 ,  H02P101/15

CPC分类号： H02P9/007 ,  F03D9/00 ,  H02J3/18 ,  H02J3/1885 ,  H02P23/26 ,  H02P2101/15 ,  Y02E10/763 ,  Y02E40/30

摘要： The invention is directed to a method for controlling a wind turbine connected to a three-phase electrical supply grid during an asymmetrical grid fault. The method is configured for wind turbines with a doubly-fed induction generator. The reactive current to be fed into the electrical supply grid in the negative phase-sequence system is generated by the line-side and the rotor-side converter in a coordinated manner and depends on the line voltage. The reactive current to be fed into the electrical supply grid is distributed among the rotor-side and line-side converters. As a result, even in the case of severely asymmetrical grid faults, the reactive current to be fed into the electrical supply grid can be provided and excessive loading of the rotor-side converter can be prevented using simple means. The invention is also directed to a wind turbine for performing the above method.

摘要翻译： 本发明涉及一种用于控制在不对称电网故障期间连接到三相电网的风力涡轮机的方法。 该方法被配置为具有双馈感应发电机的风力涡轮机。 在负相序系统中馈送到电网的无功电流由线路侧和转子侧转换器以协调的方式产生，并且取决于线路电压。 馈送到电网的无功电流分布在转子侧和线路侧转换器之间。 结果，即使在严重不对称的电网故障的情况下，也可以提供馈送到电网的无功电流，并且可以使用简单的手段防止转子侧转换器的过载。 本发明还涉及一种用于执行上述方法的风力涡轮机。

公开(公告)号：US20130292885A1

公开(公告)日：2013-11-07

申请号：US13886038

申请日：2013-05-02

申请人： NORDEX ENERGY GMBH

发明人： Dirk Austinat ,  Marco Frankowski

IPC分类号： F03D11/00

CPC分类号： F03D1/0675 ,  B29C33/14 ,  B29C70/68 ,  Y02E10/721 ,  Y02P70/523 ,  Y10T428/24479 ,  Y10T428/24612

摘要： A method for making a wind turbine member wherein a plurality Of components are arranged in a mold. The inner side of the mold determines a surface of the wind turbine member. The components are connected to one another. At least one of the components is a prefabricated structural element which has a fixed geometry with an outer surface. The prefabricated structural element has a positioning projection protruding out of the outer surface and the mold has, on its inner side, a positioning receptacle. The positioning projection is inserted positively into the positioning receptacle to determine the disposition of the prefabricated structural element in the mold.

摘要翻译： 一种用于制造风力涡轮机构件的方法，其中多个部件布置在模具中。 模具的内侧确定风力涡轮机构件的表面。 组件彼此连接。 至少一个部件是具有外表面的固定几何形状的预制结构元件。 预制结构件具有从外表面突出的定位突出部，并且模具的内侧具有定位插座。 定位突起被积极地插入到定位接收器中以确定预制结构元件在模具中的布置。

公开(公告)号：USRE44464E1

公开(公告)日：2013-08-27

申请号：US13694153

申请日：2012-10-31

申请人： Nordex Energy GmbH

发明人： Mark Jurkat ,  Ulrich Harms

IPC分类号： G01R21/06

CPC分类号： F03D7/046 ,  F05B2270/1033 ,  F05B2270/32 ,  F05B2270/335 ,  F05B2270/802 ,  Y02E10/723

摘要： The present invention is related to a method for determining a characteristic curve (9) for an electric variable (Pel, Q, φ, cos φ, IP, IQ) of a wind energy plant (1). According to the present invention, it is provided that at least one characteristic value of the electric variable (Pel, Q, φ, cos φ, IP, IQ) is measured for at least one value of the wind (vW), and for the at least one value of the wind (vW), a characteristic value of the electric variable (Pel, Q, φ, cos φ, IP, IQ) is adapted from a predetermined characteristic curve (7) containing characteristic values of the electric variable (Pel, Q, φ, cos φ, IP, IQ) as a function of different values of the wind (vW), taking into account the characteristic value measured for the at least one value of the wind (vW).

摘要翻译： 本发明涉及一种用于确定风力发电厂（1）的电气变量（Pel，Q，phi，cos phi，IP，IQ）的特性曲线（9）的方法。 根据本发明，提供对于风（vW）的至少一个值来测量电变量（Pel，Q，phi，cosφ，IP，IQ）的至少一个特征值，并且对于 风电（vW）的至少一个值，电变量（Pel，Q，phi，cos phi，IP，IQ）的特征值适应于包含电变量（的特征值）的预定特性曲线（7） Pel，Q，phi，cos phi，IP，IQ）作为风的不同值（vW）的函数，考虑到对于至少一个风值（vW）测量的特征值。