公开(公告)号：US20160208781A1

公开(公告)日：2016-07-21

申请号：US14916618

申请日：2014-09-03

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Martin Ansbjerg KJÆR ,  Peter KOLDKJÆR ,  Mølgaard Hviid KNUDSEN ,  Maryam SOLEIMANZADEH ,  Martin Møller SØRENSEN ,  Ali ZAIB ,  Arvishwa Kumar SINGH ,  Poul Brandt CHRISTENSEN ,  Michael Houlind JENSEN

IPC: F03D7/02 ,  G05F1/66 ,  F03D9/00 ,  F03D7/04 ,  F03D1/06

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风轮机，风力涡轮机可以被配置为在取决于风速的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，星型配置可能是优选的，而对于高风速，优选配置三角形配置。 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，导致转子速度增加。 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稍高于当前速度，可以减轻涡轮机所经历的转矩变化并降低结构故障的可能性。

公开(公告)号：US20190383267A1

公开(公告)日：2019-12-19

申请号：US16463750

申请日：2017-11-13

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Kasper Zinck ØSTERGAARD ,  Gustavo MONJO ,  Martin Ansbjerg KJÆR

IPC: F03D7/04 ,  G05B15/02

Abstract: A method, a controller and a wind turbine with a controller for controlling the wind turbine in a cluster of wind turbines. Each wind turbine is controlled individually and each windturbine is configured to deliver power to the same utility grid. According to the method a delivery from a first wind turbine is reduced from a present power level to a reduced power level in response to an initial frequency of the utility grid exceeding a first threshold value; and the wind turbine is allowed to continue delivering power at the reduced power level.

公开(公告)号：US20190093634A1

公开(公告)日：2019-03-28

申请号：US16143818

申请日：2018-09-27

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Ciprian BIRIS ,  Uffe C. MERRILD ,  Leif Svinth CHRISTENSEN ,  Martin Ansbjerg KJÆR

IPC: F03D9/25 ,  F03D7/02 ,  H02J3/18 ,  H02J3/38

Abstract: Controlling a wind turbine during a grid fault where the grid voltage drops below a nominal grid voltage. After detection of a grid fault, the total current limit for the power converter output is increased to a total maximum overload current limit. Depending on whether active or reactive current generation is prioritized, an active or reactive current reference is determined. The active current reference is determined in a way so that a reduction in active power production due to the grid voltage drop is minimized and based on the condition that the vector-sum of the active output current and the reactive output current is limited according to the total maximum overload current limit, and a maximum period of time is determined in which the power converter can be controlled based on the active/reactive current references. Afterwards the power converter is controlled based on the active and reactive current references.

公开(公告)号：US20180320663A1

公开(公告)日：2018-11-08

申请号：US15775356

申请日：2016-11-17

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Martin Ansbjerg KJÆR ,  Kasper Zinck OSTERGAARD ,  Jan GRAUGAARD-JENSEN

IPC: F03D7/02

Abstract: Embodiments of the present invention relate to control of a wind turbine during a recovery period after a grid fault. It is disclosed to operate a wind turbine during the recovery period to determine the actual pitch angle of the rotor blades and the actual wind speed, and based on that determining a desired pitch angle of the rotor blades, as well as a pitch ramp rate so that the actual pitch angle can be brought to match the desired pitch angle before the end of the recovery period. In embodiments, the steps performed in the recovery mode are repeated at intervals during the recovery period.

公开(公告)号：US20170226988A1

公开(公告)日：2017-08-10

申请号：US15518992

申请日：2015-10-08

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Martin Ansbjerg KJÆR ,  Fabio CAPONETTI ,  Ian COUCHMAN ,  Jesper Sandberg THOMSEN ,  Thomas KRÜGER ,  Jorge Martinez GARCIA

IPC: F03D7/02 ,  H02K7/18 ,  H02P9/04

CPC classification number: F03D7/0284 ,  F03D7/0296 ,  F03D7/048 ,  F05B2260/96 ,  F05B2260/964 ,  F05B2270/334 ,  F05B2270/337 ,  H02K7/183 ,  H02P9/04 ,  Y02E10/723

Abstract: The invention relates to a method for wind turbine generators for reducing electrical disturbances in the form of power variations which are caused by damping controllers arranged the compensate structural oscillations by inducing shaft torque variations. The shaft torque variations are generated by imposing corresponding variations in a generator set-point, e.g. a power or torque set-point. Variations in the generator set-point cause undesired variations in the power injected to the grid by one or more wind turbine generators. According to an embodiment of the invention the electrical disturbances may be reduced by limiting a damping controller's control action. The amount of limitation or restriction of the damping controller may be determined on basis on electrical disturbance information determined from power measured e.g. at a location on the grid.

公开(公告)号：US20180283354A1

公开(公告)日：2018-10-04

申请号：US15759150

申请日：2016-09-27

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Keld HAMMERUM ,  Martin Ansbjerg KJÆR ,  Jesper Sandberg THOMSEN ,  Eik HERBSLEB ,  Tobias Gybel HOVGAARD

IPC: F03D7/04

Abstract: The present disclosure relates to a control system for a wind turbine comprising more controllers and where at least some of the controllers operate at different sample frequencies. The control system comprises at least two controller units, a first controller (10) for determining an operational value (OV) of a sub-system and a second controller (20) for the sub-system. The second controller operates at a higher sample frequency than the first controller. It is disclosed that a faster reaction to a received demand value (V1), received for controlling the sub-system, can be obtained by setting the operational value (OV) of the sub-system as the sum of an internal operational value (V5) and a difference value (V4).

公开(公告)号：US20180171974A1

公开(公告)日：2018-06-21

申请号：US15735524

申请日：2016-06-09

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Martin Ansbjerg KJÆR ,  Jesper Sandberg THOMSEN ,  Jacob Krogh KRISTOFFERSEN ,  Jacob Deleuran GRUNNET

IPC: F03D7/02

CPC classification number: F03D7/028 ,  F05B2270/1033 ,  F05B2270/309 ,  F05B2270/335 ,  Y02E10/723

Abstract: The invention relates to a control system for a wind turbine. The wind turbine comprises a power generator configured to generate power dependent on a power request. The control system comprises a ramp rate limiter configured to restrict a rate of change of the power request according to a rate of change limit and configured to determine the rate of change limit dependent on a power difference between the power request and an estimated available wind power.

公开(公告)号：US20180051675A1

公开(公告)日：2018-02-22

申请号：US15554356

申请日：2016-02-29

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Martin Ansbjerg KJÆR ,  Robert BOWYER ,  Robert GRØN-STEVENS ,  Jacob Deleuran GRUNNET ,  Carsten Nørlund THOMSEN ,  Jesper Sandberg THOMSEN

IPC: F03D7/02 ,  G05B15/02

CPC classification number: F03D7/0284 ,  F03D7/0224 ,  F03D7/0276 ,  F05B2220/706 ,  F05B2270/1033 ,  F05B2270/32 ,  F05B2270/327 ,  F05B2270/328 ,  F05B2270/337 ,  G05B15/02 ,  Y02E10/723 ,  Y02E10/725

Abstract: Embodiments herein describe varying the rotor speed based on the current wind speed when operating in a low power mode. Generally, as the wind speed increases above the rated wind speed (i.e., the wind speed at which the turbine is capable of producing its rated or maximum output power), the rotor speed can be reduced thereby minimizing the risk that the turbine experiences smearing or torque reversals. In one embodiment, as the rotor speed decreases, the turbine maintains the ability to ramp to the rated power of the turbine only by pitching in the blades to an optimal blade pitch angle. Thus, upon receiving a request to cease operating in the low power mode, the turbine can increase the output power to the rated power without first increasing the rotor speed.

公开(公告)号：US20170051723A1

公开(公告)日：2017-02-23

申请号：US15118795

申请日：2015-01-27

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Martin Ansbjerg KJÆR ,  Lars Finn Sloth LARSEN

IPC: F03D7/02 ,  F03D7/04 ,  G05B15/02 ,  F03D9/00

CPC classification number: F03D7/0284 ,  F03D7/0224 ,  F03D7/048 ,  F03D9/257 ,  F05B2270/1033 ,  F05B2270/328 ,  F05B2270/337 ,  G05B15/02 ,  G05B2219/2619 ,  Y02E10/723 ,  Y02E10/725 ,  Y02E10/726

Abstract: The present invention relates to a method for operating a wind power plant in a wake situation, said wind power plant being connected to a power grid, the method comprising the steps of operating the wind power plant in a predetermined power mode of operation, terminating said predetermined power mode of operation, and increasing power generation of the wind power plant to a power level that exceeds an optimized wake power level of the wind power plant, and injecting the increased amount of power into the power grid as a power boost. Thus, the present invention is capable of generating a power boost to an associated power grid, said power boost exceeding the power level normally being available in a wake situation. The present invention further relates to a system for carrying out the method.

Abstract translation: 本发明涉及一种用于在尾流情况下操作风力发电设备的方法，所述风力发电设备连接到电网，所述方法包括以预定功率运行模式操作风力发电设备的步骤，将所述风力发电设备停止所述 预定功率运行模式，并且将风力发电厂的发电量增加到超过风力发电厂的优化尾流功率水平的功率水平，以及将增加的功率量作为功率提升注入到电网中。 因此，本发明能够产生对相关电网的功率提升，所述功率提升超过通常在唤醒情况下可用的功率水平。 本发明还涉及一种用于执行该方法的系统。

公开(公告)号：US20150322926A1

公开(公告)日：2015-11-12

申请号：US14762028

申请日：2013-01-25

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Fabio CAPONETTI ,  Martin Ansbjerg KJÆR

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

CPC classification number: F03D7/0276 ,  F03D7/028 ,  F03D7/042 ,  F03D7/045 ,  F03D13/20 ,  F03D17/00 ,  F05B2260/821 ,  F05B2270/1091 ,  F05B2270/3032 ,  F05B2270/404 ,  Y02E10/723

Abstract: A method of controlling a wind turbine is described. The method involves forecasting the temperature evolution of a component of the wind turbine based upon the current operating parameters of the wind turbine and upon a required power output; predicting from the temperature forecast a future alarm event caused by the temperature of the component exceeding a first threshold level or falling below a second threshold level; and adjusting the operating parameters of the wind turbine to control the temperature evolution of the component thereby to avoid or delay the predicted alarm event.

Abstract translation: 描述了一种控制风力涡轮机的方法。 该方法包括基于风力涡轮机的当前操作参数和所需的功率输出来预测风力涡轮机的部件的温度演变; 从温度预测中预测由组件的温度超过第一阈值水平或低于第二阈值水平引起的未来报警事件; 并调整风力涡轮机的运行参数以控制部件的温度演化，从而避免或延迟预测的报警事件。