CN107121122A - A kind of Wind turbines tower dynamic rate justifies analysis method - Google Patents
A kind of Wind turbines tower dynamic rate justifies analysis method Download PDFInfo
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- CN107121122A CN107121122A CN201710396753.2A CN201710396753A CN107121122A CN 107121122 A CN107121122 A CN 107121122A CN 201710396753 A CN201710396753 A CN 201710396753A CN 107121122 A CN107121122 A CN 107121122A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/32—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring the deformation in a solid
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C5/00—Measuring height; Measuring distances transverse to line of sight; Levelling between separated points; Surveyors' levels
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C9/00—Measuring inclination, e.g. by clinometers, by levels
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
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Abstract
Justify analysis method the invention discloses a kind of Wind turbines tower dynamic rate, comprise the following steps：1) after Wind turbines tower installation, one twin shaft dynamic inclination sensor is respectively installed on tower top and bottom；2) blower fan normally runs a period of time, period at least obtains angle of inclination data when 3 different directions blower fans reach rated power, it recorded in database, data during this draw accumulation graph, this figure is converted into photo, the inscribed circle for calculating accumulation diagram shape is handled by machine vision, this inscribed circle is justified for blower fan initial maximum rigidity；4) after Wind turbines tower runs a period of time, the tilt data that the twin shaft dynamic inclination sensor of top and bottom in this period is obtained draws accumulation graph, this figure is converted into photo, and the inscribed circle for calculating accumulation diagram shape is handled by machine vision, carries out contrast judgement.
Description
Technical field
The present invention relates to wind-power tower field, more particularly to a kind of Wind turbines tower dynamic rate circle analysis method.
Background technology
The tower of Wind turbines is the load-supporting part in wind power generating set, main in wind power generating set to play support work
With while absorbing unit vibrations.Tower subjects thrust, the load complicated and changeable such as moment of flexure and torque load so that wind-force is sent out
In group of motors running, what tower occurred certain amplitude the deformation such as waves and distorts；In addition, tower also suffers from material change
Change, the influence of the factor such as parts failure and settlement of foundation, run-off the straight.The excessive inclination and distortion of tower can influence wind-force to send out
The normal operation of group of motors, serious can also produce security incident, accordingly, it would be desirable to Wind turbines foundation settlement and tower safety
Detected in real time, and how to be evaluated by the tower tilt data of acquisition tower structure whether safety and Health, this does not have always
There is a good solution.
At present, the inclined alarm of tower, each producer are used as using fixed slope (empirical value, from standard)
The height of type blower fan tower barrel, tower inner wall thickness is all different, causes the rigidity of various types of towers to differ, uses one
The slope of individual fixation is used as judgment criteria to variety classes tower, it is impossible to accomplish accurate alarm.At the beginning of tower can not being learnt at present
Begin the slope installed, and whether the practical stiffness characteristic of tower structure, tower drum flange bolt connection loosens, and whether tower structure has
Damage etc..
And there is presently no the side that a kind of Wind turbines tower can detect its structure safety under working
Method.
The content of the invention
It is an object of the invention to the above-mentioned not enough and defect for prior art, there is provided a kind of Wind turbines tower dynamic
Rigidity justifies analysis method, to solve the above problems.
A kind of Wind turbines tower dynamic rate justifies analysis method, it is characterised in that comprise the following steps：
1) after Wind turbines tower installation, one twin shaft dynamic inclination sensing is respectively installed on tower top and bottom
Device；
2) blower fan brings into operation normally runs a period of time at initial stage, and during which blower fan at least reaches hair in 3 different wind directions
Electric rated power, angle of inclination data of twin shaft dynamic inclination sensor recorded in database during this, and data draw accumulation
Figure, this figure is converted into photo, and the inscribed circle for calculating accumulation diagram shape is handled by machine vision, and this inscribed circle is that blower fan is initial
Maximum rigidity is justified, and inscribe fits two top initial maximum rigidity circles and bottom initial maximum rigidity circle respectively, and top is initial
The center of circle 01 of maximum rigidity circle, radius R1, the center of circle 02 of bottom initial maximum rigidity circle, radius R2；
3) when Wind turbines tower is during operation, what the twin shaft dynamic inclination sensors of top and bottom was obtained
When tilt data is not in above-mentioned top initial maximum rigidity circle and bottom initial maximum rigidity circle, alarm signal is sent；
4) after Wind turbines tower runs a period of time, by the twin shaft dynamic inclination of the top and bottom in this period
The tilt data that sensor is obtained draws accumulation graph, and this figure is converted into photo, is handled by machine vision and calculates accumulation graph
The inscribed circle of shape, inscribe fits two current top maximum rigidity circles respectively and current bottom maximum rigidity is justified, and works as sinciput
The center of circle 01 ' of portion's maximum rigidity circle, radius R1 ', the center of circle 02 ' of current bottom maximum rigidity circle, radius R2 '.
The center of circle 01, radius R1 and the center of circle 01 ', radius R1 ' are contrasted,
4.1) if the initial center of circle 01 is deviateed in the current center of circle 01 ', it can determine that as at least one of situations below：
A, it can determine whether that tower is deformed, the phasor difference in the center of circle 01 and the center of circle 01 ' is deviates size, the journey as deformed
Degree,
There is differential settlement in b, column foot；
4.2) such as current radius of circle R1 ' than initial radius of circle R1 greatly, it can determine that as at least one of situations below：
C, column foot loosen insecure；
D, tower rigidity die down；
4.3) have when twin shaft dynamic inclination sensor fits a current maximum rigidity circle in some arc-shaped edges periphery
More data point it is larger deviate circular arc when, can determine whether that 360 ° of rigidity of tower are uneven, this arc-shaped edges prescription to rigidity it is weaker,
Cause this directional stiffness weaker, be that the fixation of tower drum flange bolt loosens or tower has scar, crackle to cause.
As a result of technical scheme as above, the data that the present invention is obtained by twin shaft dynamic inclination sensor are calculated
The method of maximum rigidity circle, energy real-time online quick detection goes out can determine whether that tower deformation, column foot occurs and differential settlement, tower occurs
Base loosens the problems such as insecure, tower rigidity dies down, tower drum flange bolt fixes loosening or tower has scar, crackle.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is force analysis figure of the tower of an embodiment of the present invention under working.
Fig. 2 is the fitting schematic diagram of the one of initial maximum rigidity circle of an embodiment of the present invention.
Embodiment
In order that the technical means, the inventive features, the objects and the advantages of the present invention are easy to understand, enter below
One step illustrates the present invention.
Before the present invention is described, first Wind turbine tower structure is analyzed, with reference to shown in Fig. 1 and Fig. 2,
Because tower 100 is cylindrical structure, so the rigidity EI of 360 ° of all directions of tower 100 is equal.The stress of blower fan tower barrel can
The torque and the tower deviation of gravity center that are reduced to produced by the intrinsic gravity G of tower itself, wind load F and the fixed end taken about the point of fixation M produced.By
In the effect of driftage control, blade 110 faces wind, thus the torque produced by wind load F with M on the contrary, fixed end taken about the point of fixation M can allow
Tower produces deflection angle Θ, so formula deflection angle Θ=(M*H-F*H2/ 2)/EI, H are tower height.F becomes with wind speed, and wind speed is got over
Greatly, F is bigger；When blower fan reaches rated power, F reaches maximum Fmax；When wind speed continues to increase, wind power generating set control
System processed can adjust blade angle, it is ensured that constant torque, but F can diminish with the change of blade angle.According to formula to calculating,
After different wind directions reaches rated power, one circle of inclination angle accumulation graph inscribe formed, this circle is named as with reference to maximum
Rigidity is justified, and blower fan is in normal operation without departing from this maximum rigidity circle.
Based on above-mentioned intrinsic objective circumstances, present invention is described below.
A kind of Wind turbines tower dynamic rate justifies analysis method, comprises the following steps：
1) after Wind turbines tower installation, one twin shaft dynamic inclination sensing is respectively installed on tower top and bottom
Device；
2) blower fan brings into operation normally runs a period of time at initial stage, and during which blower fan at least reaches hair in 3 different wind directions
Electric rated power, angle of inclination data of twin shaft dynamic inclination sensor recorded in database during this, and data draw accumulation
Figure, this figure is converted into photo, and the inscribed circle for calculating accumulation diagram shape is handled by machine vision, and this inscribed circle is that blower fan is initial
Maximum rigidity is justified, and inscribe fits two top initial maximum rigidity circles and bottom initial maximum rigidity circle respectively, and top is initial
The center of circle 01 of maximum rigidity circle, radius R1, the center of circle 02 of bottom initial maximum rigidity circle, radius R2；
3) when Wind turbines tower is during operation, what the twin shaft dynamic inclination sensors of top and bottom was obtained
When tilt data is not in above-mentioned top initial maximum rigidity circle and bottom initial maximum rigidity circle, alarm signal is sent；
4) after Wind turbines tower runs a period of time, by the twin shaft dynamic inclination of the top and bottom in this period
The tilt data that sensor is obtained draws accumulation graph, and this figure is converted into photo, is handled by machine vision and calculates accumulation graph
The inscribed circle of shape, inscribe fits two current top maximum rigidity circles respectively and current bottom maximum rigidity is justified, and works as sinciput
The center of circle 01 ' of portion's maximum rigidity circle, radius R1 ', the center of circle 02 ' of current bottom maximum rigidity circle, radius R2 '.
The center of circle 01, radius R1 and the center of circle 01 ', radius R1 ' are contrasted,
4.1) if the initial center of circle 01 is deviateed in the current center of circle 01 ', it can determine that as at least one of situations below：
A, it can determine whether that tower is deformed, the phasor difference in the center of circle 01 and the center of circle 01 ' is deviates size, the journey as deformed
Degree,
There is differential settlement in b, column foot；
4.2) such as current radius of circle R1 ' than initial radius of circle R1 greatly, it can determine that as at least one of situations below：
C, column foot loosen insecure；
D, tower rigidity die down；
4.3) have when twin shaft dynamic inclination sensor fits a current maximum rigidity circle in some arc-shaped edges periphery
More data point it is larger deviate circular arc when, can determine whether that 360 ° of rigidity of tower are uneven, this arc-shaped edges prescription to rigidity it is weaker,
Cause this directional stiffness weaker, be that the fixation of tower drum flange bolt loosens or tower has scar, crackle to cause.
The method that the data digital simulation that the present invention is obtained by twin shaft dynamic inclination sensor goes out maximum rigidity circle, can be real
When on-line quick detection go out can determine whether tower occur deformation, column foot occur differential settlement, column foot loosen insecure, tower rigidity
Die down, tower drum flange bolt is fixed and loosened or tower is the problems such as have scar, crackle.
The general principle and principal character and advantages of the present invention of the present invention has been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the simply explanation described in above-described embodiment and specification is originally
The principle of invention, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (1)
1. a kind of Wind turbines tower dynamic rate justifies analysis method, it is characterised in that comprise the following steps：
1) after Wind turbines tower installation, one twin shaft dynamic inclination sensor is respectively installed on tower top and bottom；
2) blower fan brings into operation normally runs a period of time at initial stage, and during which blower fan at least reaches generating volume in 3 different wind directions
Determine power, angle of inclination data of twin shaft dynamic inclination sensor recorded in database during this, and data draw accumulation graph, this
Figure is converted into photo, and the inscribed circle for calculating accumulation diagram shape is handled by machine vision, and this inscribed circle is blower fan initial maximum
Rigidity is justified, and inscribe fits two top initial maximum rigidity circles and bottom initial maximum rigidity circle, top initial maximum respectively
The center of circle 01 of rigidity circle, radius R1, the center of circle 02 of bottom initial maximum rigidity circle, radius R2；
3) when Wind turbines tower is during operation, the inclination that the twin shaft dynamic inclination sensors of top and bottom is obtained
When data are not in above-mentioned top initial maximum rigidity circle and bottom initial maximum rigidity circle, alarm signal is sent；
4) after Wind turbines tower runs a period of time, the twin shaft dynamic inclination of the top and bottom in this period is sensed
The tilt data that device is obtained draws accumulation graph, and this figure is converted into photo, is handled by machine vision and calculates accumulation diagram shape
Inscribed circle, respectively inscribe fit two current top maximum rigidities circle and current bottom maximum rigidity circle, current top is most
The center of circle 01 ' of big rigidity circle, radius R1 ', the center of circle 02 ' of current bottom maximum rigidity circle, radius R2 '.
The center of circle 01, radius R1 and the center of circle 01 ', radius R1 ' are contrasted,
4.1) if the initial center of circle 01 is deviateed in the current center of circle 01 ', it can determine that as at least one of situations below：
A, it can determine whether that tower is deformed, the phasor difference in the center of circle 01 and the center of circle 01 ' is deviates size, the degree as deformed,
There is differential settlement in b, column foot；
4.2) such as current radius of circle R1 ' than initial radius of circle R1 greatly, it can determine that as at least one of situations below：
C, column foot loosen insecure；
D, tower rigidity die down；
4.3) when twin shaft dynamic inclination sensor fits a current maximum rigidity circle in some arc-shaped edges periphery with more
Individual data point is larger when deviateing circular arc, can determine whether that 360 ° of rigidity of tower are uneven, this arc-shaped edges prescription to rigidity it is weaker, cause
This directional stiffness is weaker, is that the fixation of tower drum flange bolt loosens or tower has scar, crackle to cause.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710396753.2A CN107121122B (en) | 2017-05-31 | 2017-05-31 | A kind of Wind turbines tower dynamic rate circle analysis method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710396753.2A CN107121122B (en) | 2017-05-31 | 2017-05-31 | A kind of Wind turbines tower dynamic rate circle analysis method |
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| CN107121122A true CN107121122A (en) | 2017-09-01 |
| CN107121122B CN107121122B (en) | 2019-08-06 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109596175A (en) * | 2018-12-28 | 2019-04-09 | 深圳前海慧联科技发展有限公司 | A kind of inclination of wind-power tower and shake on-line monitoring system |
| CN112102240A (en) * | 2020-08-11 | 2020-12-18 | 风脉能源（武汉）股份有限公司 | Method and device for measuring inclination of tower drum foundation ring based on machine vision, and computer equipment |
| CN113503231A (en) * | 2021-08-19 | 2021-10-15 | 华能盐城大丰新能源发电有限责任公司 | Tower inclination and foundation settlement evaluation method and system under variable working conditions of wind turbine generator |
| CN113513454A (en) * | 2021-08-18 | 2021-10-19 | 华能定边新能源发电有限公司 | Double-fed wind generating set tower barrel structure safety dynamic monitoring method |
| CN115539325A (en) * | 2022-09-27 | 2022-12-30 | 西安热工研究院有限公司 | Tower vibration early warning method based on wind turbine generator system |
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| US20150167646A1 (en) * | 2012-07-26 | 2015-06-18 | Vestas Wind Systems As | Tilting wind turbine |
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| US20150167646A1 (en) * | 2012-07-26 | 2015-06-18 | Vestas Wind Systems As | Tilting wind turbine |
| CN203364814U (en) * | 2013-07-29 | 2013-12-25 | 新疆风电工程设计咨询有限责任公司 | Differential settlement observation device for wind turbine foundation |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109596175A (en) * | 2018-12-28 | 2019-04-09 | 深圳前海慧联科技发展有限公司 | A kind of inclination of wind-power tower and shake on-line monitoring system |
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| CN112102240A (en) * | 2020-08-11 | 2020-12-18 | 风脉能源（武汉）股份有限公司 | Method and device for measuring inclination of tower drum foundation ring based on machine vision, and computer equipment |
| CN113513454A (en) * | 2021-08-18 | 2021-10-19 | 华能定边新能源发电有限公司 | Double-fed wind generating set tower barrel structure safety dynamic monitoring method |
| CN113503231A (en) * | 2021-08-19 | 2021-10-15 | 华能盐城大丰新能源发电有限责任公司 | Tower inclination and foundation settlement evaluation method and system under variable working conditions of wind turbine generator |
| CN115539325A (en) * | 2022-09-27 | 2022-12-30 | 西安热工研究院有限公司 | Tower vibration early warning method based on wind turbine generator system |
| CN115539325B (en) * | 2022-09-27 | 2024-01-30 | 西安热工研究院有限公司 | Tower vibration early warning method based on wind turbine generator |
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| CN107121122B (en) | 2019-08-06 |
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