CN106841378A - A kind of in-service power transformer lead material original position Undamaged determination method - Google Patents
A kind of in-service power transformer lead material original position Undamaged determination method Download PDFInfo
- Publication number
- CN106841378A CN106841378A CN201710130186.6A CN201710130186A CN106841378A CN 106841378 A CN106841378 A CN 106841378A CN 201710130186 A CN201710130186 A CN 201710130186A CN 106841378 A CN106841378 A CN 106841378A
- Authority
- CN
- China
- Prior art keywords
- electromagnetic eddy
- insulating barrier
- detection
- detection signal
- copper cash
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
- G01B7/06—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness
- G01B7/10—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness using magnetic means, e.g. by measuring change of reluctance
Abstract
The invention discloses a kind of in-service power transformer lead material original position Undamaged determination method, comprise the following steps：（1）Processing control sample；（2）By electromagnetic eddy method, the signal intensity of copper cash and aluminum steel is detected across the insulating barrier, make regression analysis curve；（3）The probe vertical is placed on detected material surface, if detection signal enters in the first sorting region, the detected material is copper cash；If detection signal enters in the second sorting region, the detected material is aluminum steel.Using detection method of the invention, the Undamaged determination in situ to transformer coil Material Processing can be realized across insulating barrier in the case where transformer is not destroyed, meanwhile, also original position detects the thickness of transformer coil Material Processing insulating barrier.
Description
Technical field
The present invention relates to transformer detection technique field, and in particular to a kind of in-service power transformer lead material original position nothing
Damage discrimination method.
Background technology
Product quality is the basis of power grid security, and product quality supervision is the guarantee of goods and materials effective supply.Recently due to
Copper, aluminium price differential are larger, and the phenomenon with type transformer coil with aluminium for copper remains incessant after repeated prohibition, and very big hidden danger is brought to power network safety operation.
Pretend to be the transformer of copper coil with aluminum coil, binding post is connected with copper-aluminium joint, and uses wrapped with insulation, outward
Dew binding post is all copper material, it is difficult to which it is copper cash coil transformer or aluminum steel coil transformer that difference directly perceived is internal, also cannot
By product technology parameter index differentiating transformer texture of coil.And the mode of sampling observation is taken at present, sampling observation transformer is decomposed
After detected.The detection mode cost of idleness is high, and cannot realize that 100% all standing is detected, not transformer after testing,
There is serious security risk in practical application.Therefore, for distribution transforming aluminium for the focuses such as copper, difficult point quality problems, actively research
Analyze and explore a kind of in-service power transformer lead material Cleaning Principle and method just seems particularly urgent and important.
The content of the invention
The purpose of the present invention is the deficiency for overcoming prior art, is simple, effectively differentiates in-service power transformer wire
A kind of material, there is provided in-service power transformer lead material lossless quick discrimination method in situ.For this purpose, the present invention
The technical scheme of use is：
A kind of in-service power transformer lead material original position Undamaged determination method, methods described step is：
S1：Processing control sample：
Control sample select wire include copper cash and aluminum steel, material, physical dimension, surface state and Technology for Heating Processing, it is necessary to
It is consistent around prepared material with the power transformer winding being authenticated, scantling includes the various capacity transformer coil institutes of coiling
Using the wire specification for arriving, respectively one section of the interception of every kind of dimension wire is covered each by the insulation of 1mm~5mm different-thickness above
Layer；
S2：By electromagnetic eddy method, the signal intensity of copper cash and aluminum steel is detected across the insulating barrier, make regression analysis
Curve：
（1）Electromagnetic eddy detection probe is connected on electromagnetic eddy detector by cable, opens the electromagnetic eddy detection
Instrument, detection frequency is set according to wire material, and its computing formula is：
F=3ρ/t2
Wherein：F is detection frequency, and unit is KHz, and ρ is resistivity, and unit is that μ Ω cm, t are electromagnetic eddy detection depth,
Unit is mm；
（2）After set of frequency is finished, by the probe placement on the insulating barrier of the control sample, observation probe calibration is bent
Line, by adjusting " preposition ", " driving " on the electromagnetic eddy detector, " correction " parameter so that the curve is unsaturated
It is undistorted, it is sine wave；
（3）The electromagnetic eddy detector is arranged to single impedance plane, model selection " half range phase " pattern is sorted, region is sorted
Select to be 2, the electromagnetic eddy detector is adjusted into working condition, and the probe placement in atmosphere, is pressed " balance key "
Detection signal is moved into screen balance point position, the probe vertical is placed on the insulating barrier of the control sample, this
When detection signal frame out balance point position, adjust " gain " and " phase " so that cover the electromagnetic eddy of the insulating barrier
Signal can be displayed on screen, and adjustment first sorts position and the area in region so that the first sorting region can
Covering copper cash detection signal, adjustment second sorts position and the area in region so that the second sorting region being capable of aluminium coating
Line detection signal；
（4）Electromagnetic eddy signal intensity amplitude of the record copper cash and aluminum steel under the different insulative thickness degree, makes back respectively
Return analysis curve；
S3：Detection：
The probe vertical is placed on detected material surface, it is described if detection signal enters in the first sorting region
It is copper cash to be detected material；If detection signal enters in the second sorting region, the detected material is aluminum steel.
Preferably, the thickness of the insulating barrier is respectively 1mm, 2mm, 3mm, 4mm and 5mm.
Preferably, the thickness of the insulating barrier is simultaneously displayed on single impedance plane.
The beneficial effects of the invention are as follows：
（1）In the case where transformer is not destroyed, can be realized to the Undamaged determination in situ of coil Material Processing across insulating barrier；
（2）In the case where transformer is not destroyed, the thickness of transformer coil Material Processing insulating barrier can be gone out with situ detection.
Brief description of the drawings
Fig. 1 is the control sample insulating barrier schematic diagram that the present invention applies example.
Fig. 2 is the control sample schematic diagram of the embodiment of the present invention.
Fig. 3 is the schematic diagram of the electromagnetic eddy detection signal of the embodiment of the present invention, wherein：
1 is equalization point, and 2 is that aluminium sorts region, and 3 is that copper material sorts region, and 4 is aluminium detection signal, and 5 is copper material detection signal
Fig. 4 is the electromagnetic eddy detection signal and thickness of insulating layer homologous thread schematic diagram of the embodiment of the present invention.
Fig. 5 is the discrimination method schematic diagram of the embodiment of the present invention, wherein：
1 is control sample, and 2 is electromagnetic eddy detection probe, and 3 is signal connecting line, and 4 is electromagnetic eddy detector.
Specific embodiment
A kind of in-service power transformer lead material original position Undamaged determination method, methods described step is：
S1：Processing control sample：
Control sample select wire include copper cash and aluminum steel, material, physical dimension, surface state and Technology for Heating Processing, it is necessary to
It is consistent around prepared material with the power transformer winding being authenticated, scantling includes the various capacity transformer coil institutes of coiling
Using the wire specification for arriving, respectively one section of the interception of every kind of dimension wire is covered each by the insulation of 1mm~5mm different-thickness above
Layer.In the present embodiment, the thickness of insulating barrier is respectively 1mm, 2mm, 3mm, 4mm and 5mm, as depicted in figs. 1 and 2.
S2：By electromagnetic eddy method, the signal intensity of copper cash and aluminum steel is detected across the insulating barrier, make and return
Analysis curve：
（1）Electromagnetic eddy detection probe is connected on electromagnetic eddy detector by cable, opens the electromagnetic eddy detection
Instrument, detection frequency is set according to wire material, and its computing formula is：
F=3ρ/t2
Wherein：F is detection frequency, and unit is KHz, and ρ is resistivity, and unit is that μ Ω cm, t are electromagnetic eddy detection depth,
Unit is mm；
（2）After set of frequency is finished, by the probe placement on the insulating barrier of the control sample, observation probe calibration is bent
Line, by adjusting " preposition ", " driving " on the electromagnetic eddy detector, " correction " parameter so that the curve is unsaturated
It is undistorted, it is approximately sine wave；
（3）The electromagnetic eddy detector is arranged to single impedance plane, model selection " half range phase " pattern is sorted, region is sorted
Select to be 2, specific interface is as shown in Figure 3.The electromagnetic eddy detector is adjusted to working condition, the probe placement exists
In air, press " balance key " and detection signal is moved into screen balance point position, the probe vertical is placed on the contrast
On the insulating barrier of sample, now detection signal frames out balance point position, adjusts " gain " and " phase " so that described in covering
The electromagnetic eddy signal of insulating barrier can be displayed on screen so that the phase angle of copper signal and aluminum steel signal has substantially
Difference, it is specific as shown in Figure 3.Adjustment first sorts position and the area in region so that the first sorting region can be covered
Lid copper cash detection signal, adjustment second sorts position and the area in region so that the second sorting region can cover aluminum steel
Detection signal；
（4）Electromagnetic eddy signal intensity amplitude of the record copper cash and aluminum steel under the different insulative thickness degree, makes back respectively
Return analysis curve, curve synoptic diagram is as shown in Figure 4.；
S3：Detection：
As shown in figure 5, the probe vertical is placed on detected material surface, if detection signal enters the first sorting region
Interior, then the detected material is copper cash；If detection signal enters in the second sorting region, the detected material is aluminium
Line.Additionally, the thickness of insulating layer for being detected material is simultaneously displayed on single impedance plane.
Using detection method of the invention, can be realized to transformation across insulating barrier in the case where transformer is not destroyed
The Undamaged determination in situ of device coil Material Processing, meanwhile, also original position detects the thickness of transformer coil Material Processing insulating barrier.
Claims (3)
1. a kind of in-service power transformer lead material original position Undamaged determination method, it is characterised in that methods described step is：
S1：Processing control sample：
Control sample select wire include copper cash and aluminum steel, material, physical dimension, surface state and Technology for Heating Processing, it is necessary to
It is consistent around prepared material with the power transformer winding being authenticated, scantling includes the various capacity transformer coil institutes of coiling
Using the wire specification for arriving, respectively one section of the interception of every kind of dimension wire is covered each by the insulation of 1mm~5mm different-thickness above
Layer；
S2：By electromagnetic eddy method, the signal intensity of copper cash and aluminum steel is detected across the insulating barrier, make regression analysis
Curve：
（1）Electromagnetic eddy detection probe is connected on electromagnetic eddy detector by cable, opens the electromagnetic eddy detection
Instrument, detection frequency is set according to wire material, and its computing formula is：
F=3ρ/t2
Wherein：F is detection frequency, and unit is KHz, and ρ is resistivity, and unit is that μ Ω cm, t are electromagnetic eddy detection depth,
Unit is mm；
（2）After set of frequency is finished, by the probe placement on the insulating barrier of the control sample, observation probe calibration is bent
Line, by adjusting " preposition ", " driving " on the electromagnetic eddy detector, " correction " parameter so that the curve is unsaturated
It is undistorted, it is sine wave；
（3）The electromagnetic eddy detector is arranged to single impedance plane, model selection " half range phase " pattern is sorted, region is sorted
Select to be 2, the electromagnetic eddy detector is adjusted into working condition, and the probe placement in atmosphere, is pressed " balance key "
Detection signal is moved into screen balance point position, the probe vertical is placed on the insulating barrier of the control sample, this
When detection signal frame out balance point position, adjust " gain " and " phase " so that cover the electromagnetic eddy of the insulating barrier
Signal can be displayed on screen, and adjustment first sorts position and the area in region so that the first sorting region can
Covering copper cash detection signal, adjustment second sorts position and the area in region so that the second sorting region being capable of aluminium coating
Line detection signal；
（4）Electromagnetic eddy signal intensity amplitude of the record copper cash and aluminum steel under the different insulative thickness degree, makes back respectively
Return analysis curve；
S3：Detection：
The probe vertical is placed on detected material surface, it is described if detection signal enters in the first sorting region
It is copper cash to be detected material；If detection signal enters in the second sorting region, the detected material is aluminum steel.
2. a kind of in-service power transformer lead material original position Undamaged determination method according to claim 1, its feature exists
In the thickness of the insulating barrier is respectively 1mm, 2mm, 3mm, 4mm and 5mm.
3. a kind of in-service power transformer lead material original position Undamaged determination method according to claim 1, its feature exists
In the thickness of the insulating barrier is simultaneously displayed on single impedance plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710130186.6A CN106841378A (en) | 2017-03-07 | 2017-03-07 | A kind of in-service power transformer lead material original position Undamaged determination method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710130186.6A CN106841378A (en) | 2017-03-07 | 2017-03-07 | A kind of in-service power transformer lead material original position Undamaged determination method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106841378A true CN106841378A (en) | 2017-06-13 |
Family
ID=59138274
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710130186.6A Pending CN106841378A (en) | 2017-03-07 | 2017-03-07 | A kind of in-service power transformer lead material original position Undamaged determination method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106841378A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107748199A (en) * | 2017-10-16 | 2018-03-02 | 广西电网有限责任公司电力科学研究院 | A kind of power transformer winding material discrimination method |
| CN108562641A (en) * | 2018-04-17 | 2018-09-21 | 西南大学 | A kind of cable core material quality detecting device based on current vortex sensor |
| CN110907533A (en) * | 2019-11-27 | 2020-03-24 | 广西电网有限责任公司电力科学研究院 | Method for identifying wire by utilizing characteristic phase and line width change rule of metal wire |
| CN112345630A (en) * | 2020-10-27 | 2021-02-09 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | Device and method for detecting lead sealing state of large-thickness nonmetal coating layer accessory |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201796014U (en) * | 2010-09-15 | 2011-04-13 | 淄博职业学院 | Metal material analyzer |
| CN103630602A (en) * | 2013-11-27 | 2014-03-12 | 国家电网公司 | Detection device and detection method for texture of coil of transformer type electrical equipment |
| JP2015148574A (en) * | 2014-02-10 | 2015-08-20 | 弘美 西村 | Metallic material discrimination device |
| CN205193015U (en) * | 2015-12-14 | 2016-04-27 | 南京泰祺瑞新材料科技有限公司 | It uses test block to be used for eddy current inspection to ooze layer thickness demarcation |
| CN106443317A (en) * | 2016-10-17 | 2017-02-22 | 国网浙江省电力公司嘉兴供电公司 | Transformer copper-clad aluminum winding detector and detection method |
-
2017
- 2017-03-07 CN CN201710130186.6A patent/CN106841378A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201796014U (en) * | 2010-09-15 | 2011-04-13 | 淄博职业学院 | Metal material analyzer |
| CN103630602A (en) * | 2013-11-27 | 2014-03-12 | 国家电网公司 | Detection device and detection method for texture of coil of transformer type electrical equipment |
| JP2015148574A (en) * | 2014-02-10 | 2015-08-20 | 弘美 西村 | Metallic material discrimination device |
| CN205193015U (en) * | 2015-12-14 | 2016-04-27 | 南京泰祺瑞新材料科技有限公司 | It uses test block to be used for eddy current inspection to ooze layer thickness demarcation |
| CN106443317A (en) * | 2016-10-17 | 2017-02-22 | 国网浙江省电力公司嘉兴供电公司 | Transformer copper-clad aluminum winding detector and detection method |
Non-Patent Citations (2)
| Title |
|---|
| 吴桔生: "《电涡流技术与应用》", 31 August 2014, 中南大学出版社 * |
| 林俊明 等: "EEC-40B金属材质涡流检测仪的研制与应用", 《无损探伤》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107748199A (en) * | 2017-10-16 | 2018-03-02 | 广西电网有限责任公司电力科学研究院 | A kind of power transformer winding material discrimination method |
| CN108562641A (en) * | 2018-04-17 | 2018-09-21 | 西南大学 | A kind of cable core material quality detecting device based on current vortex sensor |
| CN110907533A (en) * | 2019-11-27 | 2020-03-24 | 广西电网有限责任公司电力科学研究院 | Method for identifying wire by utilizing characteristic phase and line width change rule of metal wire |
| CN112345630A (en) * | 2020-10-27 | 2021-02-09 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | Device and method for detecting lead sealing state of large-thickness nonmetal coating layer accessory |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106841378A (en) | A kind of in-service power transformer lead material original position Undamaged determination method | |
| CN101201339B (en) | Method for monitoring resistance spot welding quality | |
| CN106645391A (en) | Multi-frequency eddy current testing system and method for evaluating carbon fiber plate defect depth | |
| CN104764770A (en) | Pulsed eddy current infrared thermal imaging detection system and method for steel rail cracks | |
| CN102243197B (en) | Nondestructive testing method based on skin effect resistance | |
| CN109324085B (en) | Induction thermal image nondestructive testing system based on novel efficient opening magnetic yoke coil structure | |
| Fu et al. | Lift-off effect reduction based on the dynamic trajectories of the received-signal fast Fourier transform in pulsed eddy current testing | |
| CN103163211B (en) | A kind of metallic conductor surface and subsurface defect classifying identification method | |
| CN104330711A (en) | Saturated reactor insulation accelerated aging test device and test method | |
| EP3286558A1 (en) | Spectrographic material analysis using multi-frequency inductive sensing | |
| CN108344770A (en) | A kind of non-destructive testing device, method and the database of GIS tank bodies crackle | |
| Starman et al. | Automated system for crack detection using infrared thermographic testing | |
| JPH05256824A (en) | Method and apparatus for displaying characteristics of material improved by image formation of eddy current induced by laser | |
| Lv et al. | Automatic measuring and processing system of audio sensing for real-time arc height control of pulsed GTAW | |
| CN109613111B (en) | Gradient spiral eddy current detection coil and detection method thereof | |
| JP2006319303A (en) | Method and apparatus of detecting cracks of solar cell element | |
| CN206193148U (en) | Transformer copper clad aluminium winding detector | |
| CN106443317A (en) | Transformer copper-clad aluminum winding detector and detection method | |
| CN206671259U (en) | A kind of weld seam EDDY CURRENT test block | |
| Abdullah et al. | Defect detection of the weld bead based on electromagnetic sensing | |
| CN105182205B (en) | The detection device and method that vacuum circuit breaker epoxy casting body is combined with metal insert | |
| Deng et al. | Simulation analysis of eddy current testing parameters for surface and subsurface defect detection of aviation aluminum alloy plate | |
| CN115166026A (en) | System and method for identifying and classifying structural damage of carbon fiber composite board | |
| CN114460168A (en) | Pulsed eddy current detection system and method | |
| CN207965043U (en) | A kind of insulating material structure overpressure resistance detecting device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170613 |
|
| RJ01 | Rejection of invention patent application after publication |