CN214660648U - A monitoring device for structural deformation of wind turbine tower - Google Patents
A monitoring device for structural deformation of wind turbine tower Download PDFInfo
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- CN214660648U CN214660648U CN202120752495.9U CN202120752495U CN214660648U CN 214660648 U CN214660648 U CN 214660648U CN 202120752495 U CN202120752495 U CN 202120752495U CN 214660648 U CN214660648 U CN 214660648U
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- turbine generator
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- 238000012806 monitoring device Methods 0.000 title claims abstract description 15
- 238000012544 monitoring process Methods 0.000 claims abstract description 7
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 19
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 19
- 241001330002 Bambuseae Species 0.000 claims description 19
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 19
- 239000011425 bamboo Substances 0.000 claims description 19
- 239000013307 optical fiber Substances 0.000 claims description 3
- 230000005622 photoelectricity Effects 0.000 claims 3
- 238000006073 displacement reaction Methods 0.000 abstract description 12
- 238000005259 measurement Methods 0.000 abstract description 7
- 238000007664 blowing Methods 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
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- 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
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- 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
- Y02E10/728—Onshore wind turbines
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- Length Measuring Devices By Optical Means (AREA)
Abstract
The utility model relates to a monitoring device for structural deformation of a tower barrel of a wind turbine generator, which comprises a laser arranged in the tower barrel of the wind turbine generator and a photoelectric receiver arranged at the top of the tower barrel, wherein the photoelectric receiver is vertical to the horizontal plane and is fixed on the inner wall of the top of the tower barrel; the contact position of the wind power tower barrel and the bottom foundation of the wind turbine generator is not deformed, the lateral displacement of the contact position of the wind power tower barrel and the impeller of the wind turbine generator is the largest, and even if the largest displacement is deformed, the numerical value is small and the measurement is difficult; the laser is arranged inside the tower barrel, the environment in the tower barrel enables the detection device to be free from the influence of wind blowing and sunshine at ordinary times, the device of the utility model does not generate fatigue failure of devices, the measurement based on laser signals is more accurate and reliable, and the devices are arranged in the tower barrel and are not influenced by the external environment; based on the device can be for calculating the monitoring data that the deformation provides the accuracy.
Description
Technical Field
The utility model relates to a wind turbine generator system operation monitoring field, concretely relates to monitoring devices that wind turbine generator system tower section of thick bamboo structure warp.
Background
In the operation process of the wind turbine generator, the tower barrel not only bears the gravity load of the main engine of the fan and the impeller, but also bears the transverse thrust load of the impeller and the main engine. Meanwhile, the wind turbine generator belongs to rotating machinery and is influenced by incoming flow alternating wind speed and turbulence, so that the tower barrel bears complex and variable loads such as gravity, transverse thrust, distortion, bending moment and the like. The tower drum structure will generate deformation vibration with certain amplitude under complex and variable load. Under the alternating load, the amplitude and the frequency of deformation not only influence the power generation efficiency of the wind turbine generator, but also generate local permanent damage at a certain point or points under cyclic loading, and cracks are formed after a certain number of cycles or are further expanded until the cracks are completely broken, so that serious collapse accidents are caused.
Fatigue failure is a process by which damage accumulates, and therefore its mechanical characteristics differ from static failure. The difference is mainly expressed in that the failure may occur in the case of cyclic stresses much less than the static strength limit (see mechanical properties of the material), but not immediately, but over a period of time, even a long time; also, even plastic materials (ductile materials) sometimes do not have significant residual deformation before fatigue failure. Therefore, the device for monitoring the deformation of the tower drum structure in real time is an effective method for avoiding the fatigue of the tower drum structure.
The conventional tower barrel deformation monitoring device is generally in a contact type, and a strain measuring device and a deformed object need to be connected together, so that the measuring instrument is deformed. The deformation is converted into a change in an electrical physical quantity that can be conveniently measured by various methods such as a change in resistance, capacitance, or inductance. Because the wind turbine generator is generally in an extremely severe environment, high temperature, extreme cold, corrosion and salt fog not only affect the measurement precision, but also easily cause the damage of devices such as resistors, capacitors or inductors and the like.
SUMMERY OF THE UTILITY MODEL
To above the problem that traditional contact strain measurement device damaged under extreme environmental condition easily, the utility model provides an utilize reflection laser light source's method to monitor wind turbine generator system tower section of thick bamboo structure deformation situation is applicable to under all adverse circumstances.
In order to realize the purpose, the utility model discloses a technical scheme is: the utility model provides a monitoring devices that wind turbine generator system tower section of thick bamboo structure warp, is including installing the laser instrument in the wind turbine generator system tower section of thick bamboo and installing the photoelectric receiver at tower section of thick bamboo top position, and photoelectric receiver is the vertical state with the level, fixes the inner wall at tower section of thick bamboo top, and photoelectric receiver arranges the one side relative with the laser instrument in a tower section of thick bamboo.
The reflecting mirrors are arranged in two rows along the tower, and the two rows of reflecting mirrors are arranged in a staggered manner.
The reflector is vertical to the horizontal plane.
The reflector is circular, and the diameter of the reflector is 1/100 the diameter of the tower.
The number of the reflecting mirrors is 3-6.
The laser is fixed on the basis of the wind turbine generator system, and the included angle between the laser ray of the laser and the horizontal plane is theta.
The laser is connected with the offshore wind power monitoring center through an optical fiber network.
The laser is arranged at a position close to the inner wall of the tower.
Compared with the prior art, the utility model discloses following beneficial effect has at least:
because the contact position of the wind power tower barrel and the bottom foundation of the wind turbine generator is not deformed, and the lateral displacement of the contact position of the wind power tower barrel and the impeller of the wind turbine generator is the largest, even if the largest displacement is deformed, the numerical value is small, and the measurement is difficult; install the laser instrument inside a tower section of thick bamboo, the environment in a tower section of thick bamboo makes this detection device avoid the influence that wind blows the sun at ordinary times, moreover the device can not take place the fatigue failure of device, and the measurement based on laser signal is more accurate reliable moreover, based on the device can be for calculating the deformation provides accurate monitoring data.
Furthermore, on the basis of installing the laser on the bottom foundation of the wind turbine generator system, the foundation is relatively fixed, and the monitoring precision can be improved.
Furthermore, a plurality of plane mirrors are installed inside the tower barrel, the light source of the laser is irradiated on the plane mirrors, the effect of an amplifier is achieved by utilizing the planar reflection principle, the structural deformation of the tower barrel of the unit is amplified, and more accurate measurement is facilitated.
Drawings
FIG. 1 illustrates a principle of monitoring structural deformation of a tower of a wind turbine.
FIG. 2 illustrates a state of tower deformation and a calculation method.
The method comprises the following steps of 1-impeller and host, 2-wind turbine generator tower, 3-foundation, 4-laser, 5-reflector and 6-photoelectric receiver.
Detailed Description
The present invention will be described in further detail with reference to fig. 1 and 2 and the following detailed description.
The utility model provides a monitoring devices that wind turbine generator system tower section of thick bamboo structure warp, is including installing laser instrument 4 in wind turbine generator system tower section of thick bamboo 2 and installing the photoelectric receiver 6 at tower section of thick bamboo top position, and photoelectric receiver 6 is the vertical state with the level, fixes the inner wall at tower section of thick bamboo 2 top, and photoelectric receiver 6 arranges one side relative with laser instrument 4 in a tower section of thick bamboo.
The reflecting mirrors 5 are arranged in two rows along the tower tube 2, and the two rows of the reflecting mirrors 5 are arranged in a staggered manner.
The reflecting mirror 5 is perpendicular to the horizontal plane.
The reflector 5 is circular, and the diameter of the reflector 5 is 1/100 of the diameter of the tower.
The number of the reflecting mirrors 5 is 3-6.
The laser 4 is connected with the offshore wind power monitoring center through an optical fiber network.
The laser 4 is arranged close to the inner wall of the tower.
As shown in fig. 1, a monitoring device for structural deformation of a wind turbine tower, a laser 4 is installed inside a wind turbine tower 2, fixed on a foundation 3 of the wind turbine and kept in a static state, and is not affected by bending, twisting and shaking of the wind turbine tower, and a plurality of reflectors 5 are arranged on the inner wall of the tower; the reflectors 5 are arranged in two rows along the tower barrel 2, the two rows of reflectors 5 are arranged in a staggered mode, and the laser 4 emits laser which is irradiated on a plurality of reflectors 5 arranged on the inner wall surface of the tower barrel and reflected to the photoelectric receiver 6 at the top of the tower barrel.
Generally, under the influence of the blowing of the incoming wind, the tower of the wind turbine generator is swayed and deformed in the main wind direction. The position where the bottom of the tower 2 and the foundation 3 are installed can be considered as a fixed state, and the deformation displacement deltas is the largest at the position where the top of the tower 2 is combined with the impeller and the main machine 1. Of course, even the maximum deformation values are small and difficult to measure.
As shown in fig. 2 below. When the top of the wind power tower 2 deforms and displaces in the wind direction by Δ s, the position of the photoelectric receiver 6 on the wind power tower 2 generates more obvious vertical displacement change Δ h along with the deformation of the tower 2. The purpose of adding the plurality of reflectors 5 is to increase the distance between the laser 4 and the photoelectric receiver 6, so as to enlarge or reduce the deformation displacement of the tower.
The relationship between the deformation displacement Δ s of the top of the tower drum 2 and the laser-photoelectric displacement Δ h on the photoelectric receiver 6 is as follows:
wherein theta is an included angle between the laser ray and the horizontal plane and is a fixed value. The displacement delta h of the structural deformation of the tower of the wind turbine generator can be conveniently calculated by measuring and recording the displacement delta h on the photoelectric receiver 6. And further recording the time sequence value of the change of the displacement delta h, and obtaining the vibration condition of the tower barrel.
Claims (8)
1. The utility model provides a monitoring devices that wind turbine generator system tower section of thick bamboo structure warp, its characterized in that is including installing laser instrument (4) in wind turbine generator system tower section of thick bamboo (2) and installing photoelectricity receiver (6) at tower section of thick bamboo top position, and photoelectricity receiver (6) are the vertical state with the level, fix the inner wall at tower section of thick bamboo (2) top, and photoelectricity receiver (6) are arranged in tower section of thick bamboo one side relative with laser instrument (4).
2. The wind turbine tower structure deformation monitoring device as claimed in claim 1, wherein the reflectors (5) are arranged in two rows along the tower (2), and the reflectors (5) are arranged in a staggered manner.
3. The wind turbine tower structure deformation monitoring device according to claim 2, wherein the reflector (5) is perpendicular to the horizontal plane.
4. The wind turbine tower structure deformation monitoring device according to claim 2, wherein the reflector (5) is circular, and the diameter of the reflector (5) is 1/100 of the tower diameter.
5. The wind turbine tower structure deformation monitoring device according to claim 2, wherein the number of the reflectors (5) is 3-6.
6. The wind turbine tower structure deformation monitoring device according to claim 1, wherein the laser (4) is fixed on the foundation (3) of the wind turbine, and an included angle θ is formed between a laser ray of the laser (4) and a horizontal plane.
7. The device for monitoring the structural deformation of the tower of the wind turbine generator set according to claim 1, wherein the laser (4) is connected to the offshore wind power monitoring center through an optical fiber network.
8. The wind turbine tower structure deformation monitoring device according to claim 1, wherein the laser (4) is arranged near the inner wall of the tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120752495.9U CN214660648U (en) | 2021-04-13 | 2021-04-13 | A monitoring device for structural deformation of wind turbine tower |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120752495.9U CN214660648U (en) | 2021-04-13 | 2021-04-13 | A monitoring device for structural deformation of wind turbine tower |
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| Publication Number | Publication Date |
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| CN214660648U true CN214660648U (en) | 2021-11-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120752495.9U Active CN214660648U (en) | 2021-04-13 | 2021-04-13 | A monitoring device for structural deformation of wind turbine tower |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112922791A (en) * | 2021-04-13 | 2021-06-08 | 华能新能源股份有限公司 | Device and method for monitoring structural deformation of tower barrel of wind turbine generator |
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2021
- 2021-04-13 CN CN202120752495.9U patent/CN214660648U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112922791A (en) * | 2021-04-13 | 2021-06-08 | 华能新能源股份有限公司 | Device and method for monitoring structural deformation of tower barrel of wind turbine generator |
| CN112922791B (en) * | 2021-04-13 | 2024-04-23 | 华能新能源股份有限公司 | Monitoring device and method for structural deformation of wind turbine tower |
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