DK200801562A - Load monitoring of wind turbine blades - Google Patents

Load monitoring of wind turbine blades Download PDF

Info

Publication number
DK200801562A
DK200801562A DKPA200801562A DKPA200801562A DK200801562A DK 200801562 A DK200801562 A DK 200801562A DK PA200801562 A DKPA200801562 A DK PA200801562A DK PA200801562 A DKPA200801562 A DK PA200801562A DK 200801562 A DK200801562 A DK 200801562A
Authority
DK
Denmark
Prior art keywords
wind turbine
hub
blade
reflector
electromagnetic radiation
Prior art date
Application number
DKPA200801562A
Inventor
Qian Li Xiao
Original Assignee
Vestas Wind Sys As
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Vestas Wind Sys As filed Critical Vestas Wind Sys As
Priority to DKPA200801562A priority Critical patent/DK200801562A/en
Priority to PCT/DK2009/050297 priority patent/WO2010054661A2/en
Publication of DK200801562A publication Critical patent/DK200801562A/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D17/00—Monitoring or testing of wind motors, e.g. diagnostics
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction

Claims (20)

1. A wind turbine comprising - a nacelle, and - a hub rotatably mounted to the nacelle via a main shaft, the hub comprising at least one wind turbine blade, and - a blade reflector comprised in the blade, which blade reflector displaces with the blade when the blade is subjected to a change in load, and wherein - the nacelle comprises an electromagnetic radiation emitter output, and an electromagnetic radiation receiver input arranged to provide an electromagnetic radiation path from the electromagnetic radiation emitter output to the blade reflector and back towards the electromagnetic radiation receiver input, and - a deflection of the blade can be determined by a monitoring device from a change in the electromagnetic radiation received in the electromagnetic radiation receiver input when the at least one blade is subjected to the change in load.
2. A wind turbine according to claim 1 wherein the hub comprises a first hub reflector and a radiation path can be provided to and from the blade reflector via the first hub reflector.
3. A wind turbine according to claim 2, wherein the first hub reflector comprises a reflection function and a beam splitting function.
4. A wind turbine according to claim 3, wherein the first hub reflector partially reflects an incoming electromagnetic radiation and partially passes the incoming radiation.
5. A wind turbine according to any of the preceding claims, wherein the hub further comprises a second hub reflector.
6. A wind turbine according to claim 5, wherein two electromagnetic radiation paths can be provided via the first hub reflector; a first path and a second path, and - the first path is a blade deflection path which can be provided from the electromagnetic emitter output to the first hub reflector, and to the blade reflector and back via the first hub reflector to the electromagnetic receiver input, and - the second path is a reference path which can be provided from the electromagnetic emitter output to the first hub reflector and via the second hub reflector back to the first hub reflector and to the electromagnetic receiver input.
7. A wind turbine according to claim 6, wherein the first path can be compared with the second path for determination of blade deflection by an interferometry analysis.
8. A wind turbine according to any of the preceding claims 2-7, wherein the first hub reflector is fixed in the hub and rotates with the hub.
9. A wind turbine according to any of the preceding claims 2-8, wherein the first hub reflector comprises a reflection part dedicated and following each individual wind turbine blade.
10. A wind turbine according to any of the preceding claims 2-9, wherein the first hub reflector is arranged in a 45 degree angle relatively to a main shaft of the wind turbine when the blade for which it is dedicated is upright or downright.
11. A wind turbine according to any of the preceding claims 5-10, wherein the second hub reflector is rotation symmetrical around a centre of a main shaft of the wind turbine and positioned with a centre of the second hub reflector on a centreline of the main shaft.
12. A wind turbine according to any of the preceding claims 2-11, wherein the electromagnetic radiation emitter output and the radiation electromagnetic radiation receiver input and any additional optical means are arranged so as to emit and receive airborne electromagnetic radiation in a direction of a main axis of the wind turbine and symmetrically relatively to a centreline of a main shaft of the wind turbine.
13. A wind turbine according to any of the preceding claims 2-12, wherein the electromagnetic radiation is emitted to the hub and received from the hub with the electromagnetic emitter output and receiver input via a hollow main shaft of the wind turbine.
14. A wind turbine according to any of the preceding claims 2-12, wherein the electromagnetic emitter output and the electromagnetic receiver input are positioned such as to emit and receive electromagnetic radiation from and to the hub via an outside of the main shaft of the wind turbine.
15. A wind turbine according to any of the preceding claims, wherein the electromagnetic radiation output is a laser light output generated by a laser.
16. A wind turbine according to any of the preceding claims, wherein the electromagnetic radiation output is provided from one or more optical fibres operably coupled to an electromagnetic radiation emitter.
17. A method of monitoring a deflection of a wind turbine blade comprising - providing the wind turbine blade with a blade reflector which displaces with the blade when the blade is subjected to a change in load, and - providing a nacelle of the wind turbine with an electromagnetic radiation emitter output and an electromagnetic radiation receiver input, and - arranging an electromagnetic radiation path from the electromagnetic radiation emitter output to the at least one blade reflector and towards the electromagnetic radiation receiver input, and - determining the deflection of the blade from a change in the electromagnetic radiation received in the electromagnetic radiation receiver input when the at least one blade is subjected to the change in load.
18. A method of monitoring a deflection of a wind turbine blade according to claim 17, further comprising - arranging a first hub reflector in the hub, and - providing a radiation path to and from the at least one blade reflector via the first hub reflector.
19. A method of monitoring a deflection of a wind turbine blade according to any of the claims 17 or 18, wherein the deflection of the blade is at least determined when the blade is substantially at its uppermost position.
20. A method of operating a wind turbine, comprising - monitoring the wind turbine according to any of the claims 17-19, and - operating the wind turbine in response to the determined deflection.
DKPA200801562A 2008-11-12 2008-11-12 Load monitoring of wind turbine blades DK200801562A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DKPA200801562A DK200801562A (en) 2008-11-12 2008-11-12 Load monitoring of wind turbine blades
PCT/DK2009/050297 WO2010054661A2 (en) 2008-11-12 2009-11-11 Load monitoring of wind turbine blades

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK200801562 2008-11-12
DKPA200801562A DK200801562A (en) 2008-11-12 2008-11-12 Load monitoring of wind turbine blades

Publications (1)

Publication Number Publication Date
DK200801562A true DK200801562A (en) 2010-05-13

Family

ID=42170447

Family Applications (1)

Application Number Title Priority Date Filing Date
DKPA200801562A DK200801562A (en) 2008-11-12 2008-11-12 Load monitoring of wind turbine blades

Country Status (2)

Country Link
DK (1) DK200801562A (en)
WO (1) WO2010054661A2 (en)

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GB0901036D0 (en) * 2009-01-22 2009-03-11 Smart Patents Ltd Method and apparatus for measuring torque transmitted by driven wheel of a cycle or the like vehicle
DE102010017749A1 (en) 2010-07-05 2012-01-05 Ssb Wind Systems Gmbh & Co. Kg Device for the optical measurement of the bending of a rotor blade of a wind turbine
EP2458206A1 (en) * 2010-11-25 2012-05-30 Baumer Innotec AG Device and method for measuring the deformation of a rotor blade under stress and error compensation
EP2458322A1 (en) * 2010-11-25 2012-05-30 Baumer Innotec AG Device and method for measuring the deformation of a rotor blade under stress
DE102011014480B3 (en) * 2011-03-19 2012-06-14 Ssb Wind Systems Gmbh & Co. Kg Sensor device for measuring aerodynamic loads of a rotor blade of a wind turbine
EP2511651A1 (en) * 2011-04-11 2012-10-17 Baumer Innotec AG Rotor for a wind turbine and method for detecting deformation of a rotor blade
EP2559895A1 (en) * 2011-08-16 2013-02-20 Baumer Electric AG Method and device for determining the deformation of a rotor blade
US9035231B2 (en) * 2012-08-24 2015-05-19 General Electric Company System and method for monitoring load-related parameters of a wind turbine rotor blade
EP2933480A1 (en) * 2014-04-15 2015-10-21 Siemens Aktiengesellschaft Monitoring lamination of a component of a wind turbine
DE102016001227A1 (en) * 2016-02-04 2017-08-10 Kuka Roboter Gmbh load sensor
CN106523283B (en) * 2016-11-04 2019-06-04 京电能源科技有限公司 A kind of wind power generation windmill of box haul
CN110537020B (en) * 2017-01-23 2022-04-19 劳格文温德有限公司 Wind power system with low electromagnetic interference
GB202009315D0 (en) 2020-06-18 2020-08-05 General Electric Renovables Espana Sl A wind turbine blade measurement system and a method of improving accuracy of a wind turbine blade measurement system
CN115450860B (en) * 2022-09-02 2023-06-30 广东金志利科技股份有限公司 Generator set casing for wind generating set

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001183114A (en) * 1999-12-22 2001-07-06 Mitsubishi Heavy Ind Ltd Strain measuring instrument for rotary body
US7059822B2 (en) * 2004-06-30 2006-06-13 General Electrick Company Methods and apparatus for measuring wind turbine blade deflection
GB0514149D0 (en) * 2005-07-09 2005-08-17 Rolls Royce Plc In-situ component monitoring
DE102006002708B4 (en) * 2006-01-19 2007-12-06 Siemens Ag Rotor of a wind turbine
DE102006054667B4 (en) * 2006-11-17 2011-02-17 Windcomp Gmbh Collision Warning System for a Wind Turbine

Also Published As

Publication number Publication date
WO2010054661A2 (en) 2010-05-20
WO2010054661A3 (en) 2010-12-02

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AHS Application shelved for other reasons than non-payment