公开(公告)号：US09239249B2

公开(公告)日：2016-01-19

申请号：US14347976

申请日：2012-09-19

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Thomas Hjort ,  Lars Glavind

IPC: G01J1/04 ,  G01D5/353 ,  G01M5/00 ,  G01M11/08 ,  G01K11/32 ,  G01L1/24

CPC classification number: G01D5/3537 ,  G01D5/35303 ,  G01D5/35316 ,  G01D5/35341 ,  G01D5/35387 ,  G01K11/3206 ,  G01L1/246 ,  G01M5/0016 ,  G01M5/0091 ,  G01M11/083

Abstract: The present invention relates to an optical fiber for a fiber optic sensor, comprising a first optical grating adapted to operate over a first range of wavelengths; and at least one set of further gratings adapted to operate over a second range of wavelengths, each grating being adapted to operate over a portion of the second range; wherein, each grating within said set has an operating range that partially overlaps with at least one other such grating operating range. The invention also extends to a sensor system, and method, using such an optical fiber.

Abstract translation: 本发明涉及一种用于光纤传感器的光纤，包括适于在第一波长范围上工作的第一光栅; 以及适于在第二波长范围上操作的至少一组另外的光栅，每个光栅适于在所述第二范围的一部分上操作; 其中，所述组内的每个光栅具有与至少一个其它此类光栅工作范围部分重叠的工作范围。 本发明还延伸到使用这种光纤的传感器系统和方法。

公开(公告)号：US09897074B2

公开(公告)日：2018-02-20

申请号：US14593804

申请日：2015-01-09

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Thomas Hjort

IPC: H02P9/00 ,  F03D9/00 ,  F03D7/02 ,  H02J3/38 ,  H02J3/48 ,  H02M7/493 ,  F03D9/25 ,  H02M1/32

CPC classification number: F03D9/255 ,  F03D7/0272 ,  F03D7/028 ,  F03D9/257 ,  F05B2240/96 ,  F05B2270/1033 ,  H02J3/386 ,  H02J3/48 ,  H02M7/493 ,  H02M2001/325 ,  H02M2001/327 ,  Y02E10/723 ,  Y02E10/763 ,  Y02P70/523

Abstract: A wind turbine is arranged to operate in a fully-functional converter mode and a faulty-converter mode. A plurality of converters are arranged to share electric current in the fully-functional converter mode. The converters are dimensioned not only to operate at nominal active current but to provide an over-current margin to enable reactive current to be produced on top of the nominal active current in the fully-functional converter mode. In the fully-functional converter mode the converters are caused to produce reactive current on top of the nominal active current. In response to a fault of one or more of the converters, operation is changed from the fully-functional converter mode to the faulty-converter mode. In the faulty-converter mode, one or more other converters of the converter system are caused to produce additional active current by using their over-current margin to compensate at least partly for a reduction of active-current production due to the fault of one of the converters, and to reduce the reactive-current production by the other converter correspondingly.

公开(公告)号：US20140239166A1

公开(公告)日：2014-08-28

申请号：US14347976

申请日：2012-09-19

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Thomas Hjort ,  Lars Glavind

IPC: G01D5/353

CPC classification number: G01D5/3537 ,  G01D5/35303 ,  G01D5/35316 ,  G01D5/35341 ,  G01D5/35387 ,  G01K11/3206 ,  G01L1/246 ,  G01M5/0016 ,  G01M5/0091 ,  G01M11/083

Abstract: The present invention relates to an optical fibre for a fibre optic sensor, comprising a first optical grating adapted to operate over a first range of wavelengths; and at least one set of further gratings adapted to operate over a second range of wavelengths, each grating being adapted to operate over a portion of the second range; wherein, each grating within said set has an operating range that partially overlaps with at least one other such grating operating range. The invention also extends to a sensor system, and method, using such an optical fibre.

Abstract translation: 本发明涉及一种用于光纤传感器的光纤，包括适于在第一波长范围上工作的第一光栅; 以及适于在第二波长范围上操作的至少一组另外的光栅，每个光栅适于在所述第二范围的一部分上操作; 其中，所述组内的每个光栅具有与至少一个其它此类光栅工作范围部分重叠的工作范围。 本发明还延伸到使用这种光纤的传感器系统和方法。

公开(公告)号：US09903343B2

公开(公告)日：2018-02-27

申请号：US14593835

申请日：2015-01-09

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Thomas Hjort

IPC: H02P9/00 ,  F03D9/00 ,  F03D7/02 ,  H02J3/38 ,  H02J3/48 ,  H02M7/493 ,  F03D9/25 ,  H02M1/32

CPC classification number: F03D9/255 ,  F03D7/0272 ,  F03D7/028 ,  F03D9/257 ,  F05B2240/96 ,  F05B2270/1033 ,  H02J3/386 ,  H02J3/48 ,  H02M7/493 ,  H02M2001/325 ,  H02M2001/327 ,  Y02E10/723 ,  Y02E10/763 ,  Y02P70/523

Abstract: A wind turbine is arranged to operate in a fully-functional converter mode and a faulty-converter mode. A plurality of converters are arranged to share electric current in the fully-functional converter mode. The converters are dimensioned not only to operate at nominal active current but to provide an over-current margin to enable reactive current to be produced on top of the nominal active current in the fully-functional converter mode. In the fully-functional converter mode the converters are caused to produce reactive current on top of the nominal active current. In response to a fault of one or more of the converters, operation is changed from the fully-functional converter mode to the faulty-converter mode. In the faulty-converter mode, one or more other converters of the converter system are caused to produce additional active current by using their over-current margin to compensate at least partly for a reduction of active-current production due to the fault of one of the converters, and to reduce the reactive-current production by the other converter correspondingly.

公开(公告)号：US20130278918A1

公开(公告)日：2013-10-24

申请号：US13988493

申请日：2011-11-23

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Lars Glavind ,  Thomas Hjort ,  Ib Svend Olesen

IPC: G01J1/04

CPC classification number: G01J1/0425 ,  F03D9/25 ,  F03D17/00 ,  F03D80/00 ,  G01D5/35303 ,  G01D5/35316 ,  G01D5/35345 ,  G01M5/0016 ,  G01M5/0033 ,  G01M5/0091 ,  G01M11/083 ,  H02K9/24 ,  H02K11/25 ,  Y02E10/725

Abstract: A sensor system for measuring an operating parameter of a wind turbine component is described. The fibre optic sensor system comprises a light source for outputting light in a predetermined range of wavelengths, and an optical fibre comprising a long Fibre Bragg Grating, extending continuously over a length of the optical fibre to provide a continuous measurement region in the optical fibre. The optical fibre is coupled to the wind turbine component such that the continuous measurement region is located at a region of the wind turbine component to be sensed, and such that the grating period at each location in the continuous measurement period is dependent upon the value of the operating parameter at that location. A light detector receives light from the optical fibre, and provides an output signal to the controller indicating the intensity of the received light; based on the detected light, a value for the operating parameter is determined.

Abstract translation: 描述了用于测量风力涡轮机部件的操作参数的传感器系统。 光纤传感器系统包括用于输出预定波长范围的光的光源，以及包括在光纤长度上连续延伸的长光纤布拉格光栅的光纤，以在光纤中提供连续的测量区域。 光纤耦合到风力涡轮机部件，使得连续测量区域位于要感测的风力涡轮机部件的区域，并且使得连续测量周期中每个位置处的光栅周期取决于 该位置的操作参数。 光检测器从光纤接收光，并向控制器提供指示接收光的强度的输出信号; 基于检测到的光，确定操作参数的值。