CN108562414A - The wind-power tower detection method and device of rotating excitation field are generated based on frequency converter - Google Patents
The wind-power tower detection method and device of rotating excitation field are generated based on frequency converter Download PDFInfo
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- CN108562414A CN108562414A CN201711486524.6A CN201711486524A CN108562414A CN 108562414 A CN108562414 A CN 108562414A CN 201711486524 A CN201711486524 A CN 201711486524A CN 108562414 A CN108562414 A CN 108562414A
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- magnetic field
- frequency converter
- tower
- rotation
- wind
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
- G01M5/0033—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining damage, crack or wear
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
- G01M5/0041—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
- G01M5/0091—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by using electromagnetic excitation or detection
Abstract
The present invention provides a kind of wind-power tower detection methods generating rotating excitation field based on frequency converter, including following content：1) by the way that frequency converter generation frequency is adjustable, amplitude is identical, the three-phase electricity of 120 degree of phase mutual deviation；2) three-phase electricity of alternation is made to generate the magnetic field of rotation in excitation coil by excitation coil, the magnetic field of rotation will produce vortex on tower wall, and the magnetic field of rotation can be influenced in turn by being vortexed the magnetic field generated, generate resultant field；3) it detects whether magnetic field is abnormal by space vector detector for magnetic field, by the data analysis to return, obtains the position where tower defect.The present invention uses rotating excitation field technology, the internal flaw of tower and the position of bolt looseness can be quickly detected, it is not take up the generation assets of unit, it is periodically voluntarily detected in the case of calm, it can also artificially manually control, especially in typhoon weather, the higher unit shaking amplitude of wind speed is larger, can accomplish to monitor in real time at this moment.
Description
Technical field
The invention belongs to wind power generation fields, more particularly, to a kind of wind-power tower generating rotating excitation field based on frequency converter
Detection method and device.
Background technology
Wind turbines are during construction and use, especially in strong wind or the unit of typhoon area, the spiral shell of set tower drum
Bolt may generate loosening or even tower in prolonged shake in process of production may be micro- due to having inside technological reason
Small crackle and deformation, either crackle and deformation tiny in bolt looseness or tower, longtime running shaking under or
In typhoon weather, it is likely to cause the generation for the phenomenon of falling tower.
Currently, the stage of artificial climbing tower inspection is also rested on to the inspection of tower bolt in wind-powered electricity generation industry, it is time-consuming and laborious,
Want to accomplish that regular high-frequency inspection can expend prodigious manpower and materials, and can not find the small crackle and shape inside tower
Become.
Invention content
In view of this, the present invention is directed to propose it is a kind of based on frequency converter generate rotating excitation field wind-power tower detection method and
Device generates vortex using rotating excitation field technology in Wind turbines tower, and vortex can automatically be rotated in tower inner wall, work as tower
Cylinder occurs that defect can be quickly detected, and can determine defect there are when crackle and deformation inside bolt looseness or tower
Position and size.
In order to achieve the above objectives, the technical proposal of the invention is realized in this way：
The wind-power tower detection method of rotating excitation field, including following content are generated based on frequency converter：
1) by the way that frequency converter generation frequency is adjustable, amplitude is identical, the three-phase electricity of 120 degree of phase mutual deviation；
2) three-phase electricity of alternation is made to generate the magnetic field of rotation in excitation coil by excitation coil, the magnetic field of rotation is in tower
It will produce vortex on barrel, and the magnetic field of rotation can be influenced in turn by being vortexed the magnetic field generated, generate resultant field；
3) detect whether magnetic field is abnormal by space vector detector for magnetic field, by the data analysis to return,
Obtain the position where tower defect.
The detection method of space vector detector for magnetic field is：Pass through orthogonal two-by-two and nine Halls of uniform arrangement
The data adopted are transferred back to frequency conversion by the variation for the spatial structure detection space magnetic field that three magnetic field detection planes of element are formed
The inside of device is calculated, and is obtained the position where tower defect, and be transmitted to master control and booster stations by frequency converter, is given
Alarm.
The wind-power tower detection device of rotating excitation field is generated based on frequency converter, including：
Frequency converter, for generating, frequency is adjustable, amplitude is identical, the three-phase electricity of 120 degree of phase mutual deviation；
Excitation coil, for making the three-phase electricity of alternation generate the magnetic field of rotation in excitation coil, the magnetic field of rotation is in tower
It will produce vortex on barrel, and the magnetic field of rotation can be influenced in turn by being vortexed the magnetic field generated, generate resultant field；
Space vector detector for magnetic field, the exception for detecting magnetic field, and return data to frequency converter and carry out analysis meter
It calculates；
Support frame is used to support magnet exciting coil and space vector detector for magnetic field, is insulating materials；
Three-phase contactor, for disconnecting magnet exciting coil in unit normal power generation.
The space vector detector for magnetic field is made up of three magnetic field detection planes, in each magnetic field detection plane
Uniformly for detecting magnetic field, three magnetic field detection planes are mutually perpendicular to nine Hall elements of arrangement two-by-two, form a three-dimensional sky
Between structure.
Compared with the existing technology, method and device of the present invention all has following advantage：
(1) using the above scheme, using rotating excitation field technology, internal flaw and the bolt pine of tower can be quickly detected
Dynamic position is not take up the generation assets of unit, periodically voluntarily detects, can also artificially manually control, especially in the case of calm
It is in typhoon weather, the higher unit shaking amplitude of wind speed is larger, can accomplish to monitor in real time at this moment.
(2) with circuit topological structure is simple, control strategy is more simplified, energy consumption is small and the more low protrusion of experimental cost is excellent
Point.
Description of the drawings
The attached drawing for constituting the part of the present invention is used to provide further understanding of the present invention, schematic reality of the invention
Example and its explanation are applied for explaining the present invention, is not constituted improper limitations of the present invention.In the accompanying drawings：
Fig. 1 is overall workflow schematic diagram of the embodiment of the present invention；
Fig. 2 is the structural schematic diagram of space vector detector for magnetic field of the embodiment of the present invention.
Specific implementation mode
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
The present embodiment selects the frequency converter of itself inside Wind turbines, as shown in Figure 1, passing through the rectification to network voltage
And PWM modulation, generation frequency is adjustable, amplitude is identical, the three-phase electricity of 120 degree of phase mutual deviation；
Modulated three-phase electricity is sent in magnet exciting coil by three-phase contactor, magnet exciting coil just will produce rotary magnetic
, the frequency of rotating excitation field is identical as modulated three-phase electric frequency, is adjustable controlled amounts, and rotating excitation field can produce on tower wall
Raw vortex, and the outer perimeter of conductor is longer, and the frequency of rotating excitation field is high, then the vortex generated is bigger, and is vortexed the magnetic generated
Field can influence rotating excitation field in turn again, generate resultant field；
When there are, there are when crackle and deformation, which just will produce shape inside bolt looseness or tower for tower
Become, can quickly find whether magnetic field is abnormal by space vector detector for magnetic field, and data are returned into frequency converter,
By the data analysis to return, the position where tower defect is obtained, and boosting to is sent problem by frequency converter in time
It stands.
As shown in Fig. 2, the space vector detector for magnetic field is made up of three magnetic field detection planes, Mei Gejian
Nine Hall elements of uniformly arranging are surveyed in plane for detecting magnetic field, and three magnetic field detection planes are mutually perpendicular to two-by-two, form one
Three-dimensional space structure, can detect the variation of space magnetic field, the data adopted are transferred back to and calculated inside frequency converter, just
It can learn the position where tower defect, and master control and booster stations are transmitted to by frequency converter, give alarm.
The frequency converter judges that tower defect position relatively can be completed by simple data：One spatial coordinate
System forms eight spaces altogether, and data back are adopted in this eight spaces under normal circumstances has symmetry, but is having tower
The data in a certain space are abnormal relative to other seven when cylinder defect, and energy is compared to the data in this eight spaces
Judge abnormal space；This eight each Hall elements in space, which adopt data back, oneself independent channel, can be according to logical
Road judges abnormal space position.And it is exactly what DSP was good at that data, which calculate, the CPU of frequency converter controller is largely at present
DSP, can quickly obtain as a result, and which be not take up excessive system CPU.
The magnet exciting coil and space vector detector for magnetic field are supported by support frame, support frame mainly by
High-strength insulating material forms, and magnet exciting coil leakage is avoided to impact electric unit equipment.
Magnet exciting coil is disconnected in unit normal power generation by three-phase contactor, prevents it from generating interference, the contact
Device is by Frequency Converter Control.
When being detected, Wind turbines are in shutdown status, also avoid high-intensity magnetic field and are caused to running Wind turbines
It interferes and causes an accident.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
With within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention god.
Claims (4)
1. generating the wind-power tower detection method of rotating excitation field based on frequency converter, it is characterised in that including following content：
1) by the way that frequency converter generation frequency is adjustable, amplitude is identical, the three-phase electricity of 120 degree of phase mutual deviation；
2) three-phase electricity of alternation is made to generate the magnetic field of rotation in excitation coil by excitation coil, the magnetic field of rotation is in tower wall
On will produce vortex, and the magnetic field of rotation, generation resultant field can be influenced in turn by being vortexed the magnetic field generated；
3) it detects whether magnetic field is abnormal by space vector detector for magnetic field, by the data analysis to return, obtains
Position where tower defect.
2. the wind-power tower detection method according to claim 1 for generating rotating excitation field based on frequency converter, it is characterised in that：
The detection method of space vector detector for magnetic field is：By two-by-two it is orthogonal and it is uniform arrangement nine Hall elements three
The data adopted, are transferred back to the inside of frequency converter by the variation for the spatial structure detection space magnetic field that a magnetic field detection plane is formed
It is calculated, obtains the position where tower defect, and master control and booster stations are transmitted to by frequency converter, give alarm.
3. generating the wind-power tower detection device of rotating excitation field based on frequency converter, it is characterised in that including：
Frequency converter, for generating, frequency is adjustable, amplitude is identical, the three-phase electricity of 120 degree of phase mutual deviation；
Excitation coil, for making the three-phase electricity of alternation generate the magnetic field of rotation in excitation coil, the magnetic field of rotation is in tower wall
On will produce vortex, and the magnetic field of rotation, generation resultant field can be influenced in turn by being vortexed the magnetic field generated；
Space vector detector for magnetic field, the exception for detecting magnetic field, and return data to frequency converter and carry out analysis calculating；
Support frame is used to support magnet exciting coil and space vector detector for magnetic field, is insulating materials；
Three-phase contactor, for disconnecting magnet exciting coil in unit normal power generation.
4. the wind-power tower detection device according to claim 3 for generating rotating excitation field based on frequency converter, it is characterised in that：
The space vector detector for magnetic field is made up of three magnetic field detection planes, is uniformly arranged in each magnetic field detection plane
For detecting magnetic field, three magnetic field detection planes are mutually perpendicular to nine Hall elements two-by-two, form a three-dimensional space structure.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711486524.6A CN108562414A (en) | 2017-12-29 | 2017-12-29 | The wind-power tower detection method and device of rotating excitation field are generated based on frequency converter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711486524.6A CN108562414A (en) | 2017-12-29 | 2017-12-29 | The wind-power tower detection method and device of rotating excitation field are generated based on frequency converter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113090472A (en) * | 2019-12-23 | 2021-07-09 | 新疆金风科技股份有限公司 | Displacement sensor, method for monitoring bolt looseness of tower barrel and wind generating set |
| CN113791136A (en) * | 2021-09-18 | 2021-12-14 | 国电投河南新能源有限公司 | Wind power tower cylinder detection equipment of rotating magnetic field |
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| US4379261A (en) * | 1980-09-10 | 1983-04-05 | Lakin Kenneth M | Rotating magnetic field device for detecting cracks in metal |
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| CN104330468A (en) * | 2014-11-18 | 2015-02-04 | 中国石油大学(华东) | Pipeline inspection device based on rotating electromagnetic field |
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| CN206004297U (en) * | 2015-12-24 | 2017-03-08 | 中国建筑五局阿尔及利亚公司 | A kind of Three-phase electric motor phase protection system |
| CN106680742A (en) * | 2016-12-08 | 2017-05-17 | 辽宁科技大学 | Positioning and measuring device for space magneticinduction intensityvector |
| CN207937135U (en) * | 2017-12-29 | 2018-10-02 | 天津瑞能电气有限公司 | The wind-power tower detection device of rotating excitation field is generated based on frequency converter |
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2017
- 2017-12-29 CN CN201711486524.6A patent/CN108562414A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4379261A (en) * | 1980-09-10 | 1983-04-05 | Lakin Kenneth M | Rotating magnetic field device for detecting cracks in metal |
| CN1941609A (en) * | 2005-09-30 | 2007-04-04 | 许正望 | High-performance cheap AC speed-adjusting system |
| CN103487503A (en) * | 2013-09-26 | 2014-01-01 | 上海海事大学 | Rotating magnetic field eddy current detection probe |
| CN103982381A (en) * | 2014-06-07 | 2014-08-13 | 华电重工机械有限公司 | Wind power tower |
| CN204287110U (en) * | 2014-11-11 | 2015-04-22 | 中国电器科学研究院有限公司 | A kind of interior crossing type three-phase vortex detection probe |
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| JP2016105046A (en) * | 2014-12-01 | 2016-06-09 | 国立大学法人 岡山大学 | Magnetic nondestructive inspection device |
| CN206004297U (en) * | 2015-12-24 | 2017-03-08 | 中国建筑五局阿尔及利亚公司 | A kind of Three-phase electric motor phase protection system |
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| CN207937135U (en) * | 2017-12-29 | 2018-10-02 | 天津瑞能电气有限公司 | The wind-power tower detection device of rotating excitation field is generated based on frequency converter |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113090472A (en) * | 2019-12-23 | 2021-07-09 | 新疆金风科技股份有限公司 | Displacement sensor, method for monitoring bolt looseness of tower barrel and wind generating set |
| CN113791136A (en) * | 2021-09-18 | 2021-12-14 | 国电投河南新能源有限公司 | Wind power tower cylinder detection equipment of rotating magnetic field |
| CN113791136B (en) * | 2021-09-18 | 2023-10-03 | 国电投河南新能源有限公司 | Wind power tower cylinder detection equipment of rotating magnetic field |
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