CN106680297A - Method for observing dispersion staining images of fibers in transformer oil - Google Patents
Method for observing dispersion staining images of fibers in transformer oil Download PDFInfo
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- CN106680297A CN106680297A CN201710140330.4A CN201710140330A CN106680297A CN 106680297 A CN106680297 A CN 106680297A CN 201710140330 A CN201710140330 A CN 201710140330A CN 106680297 A CN106680297 A CN 106680297A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
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- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention discloses a method for observing dispersion staining images of fibers in transformer oil. The method comprises steps as follows: firstly, transformer insulating oil is filtered, and fiber particles in oil are obtained; greasy dirt on the fiber particles is removed with n-hexane; the fiber particles after greasy dirt removal are put in index-matching fluid; finally, a prepared fiber particle sample is arranged on a microscope stage of an observation platform; a microscope is adjusted, and the dispersion staining images of the fiber particles are obtained. According to the method, the ageing state of insulating paper is acquired by effectively utilizing the fibers in oil, the dispersion staining images of the fibers in oil at different ageing stages can be effectively observed, information reflecting ageing of the insulating paper and carried by the dispersion staining images of the fibers in oil is obtained, and a foundation is laid for extraction of characteristic parameters related with the ageing degree of the insulating paper of the transformer. The method is original and pioneering and has broader application prospect in the aspects of fault monitoring and state evaluation of the transformer.
Description
Technical field
The present invention relates to fault diagnosis and Condition Monitoring Technology field, fiber in particularly a kind of transformer oil
Dispersion dye image observation procedure.
Background technology
, used as the primary insulation form of transformator, it is in the factor effect such as long-term electric, hot, moisture and oxygen for paper oil insulation
Under, inevitably occur aging, wherein heat ageing is one of principal mode of Transformer Insulation Aging.Transformer insulating paper
Residual life directly determines the residual life of transformator, therefore, the degree of aging of insulating paper is estimated, can effectively sentence
Disconnected transformer insulated degree of aging simultaneously provides rational O＆M suggestion, improves power grid security level and economy.
The current main degree of aging (polymerization using the characteristic quantity assessment insulating paper such as furfural in oil dissolved gas, oil
Degree), but there is the shortcomings of dispersibility is larger, degree of accuracy is relatively low in existing method, thus its application is subject to larger restriction.
Insulating paper can come off fiber in insulating oil in ageing process, and suspension fiber carries substantial amounts of insulation in oil
Paper ageing information, can be used for the assessment of insulating paper degree of aging.Fiber can occur the change of optical characteristics in ageing process, such as
The change of refractive index.Dispersion dye image is the effective means for characterizing asbestos refractive index, it can also be used to the solid matter such as fiber
Refractometry and sign.And lack the platform that can be used in fiber dispersion dye image measurement in transformer oil at present, also lack
Weary unification and standardized method of testing.
In order to fiber obtaining the ageing state of insulating paper, needs one kind to observe transformer insulation oil in effectively utilizes oil
The method of middle fiber grain dispersion dye image.
The content of the invention
The purpose of the present invention is to propose to a kind of method that can observe fiber grain dispersion dye image in transformer insulation oil,
The method dyes the microscopic platform of object lens using dispersion is carried, by the observation sample manufacture method of standard, Neng Gouyou
Fiber dispersion dye image in the oil of different ageing steps is observed to effect, and then to extract and transformer insulating paper degree of aging
Related characteristic parameter lays the foundation.
The purpose of the present invention is achieved through the following technical solutions：
Fiber dispersion dye image observation procedure in the transformer oil that the present invention is provided, comprises the following steps：
Filter the fiber grain that transformer insulation oil is obtained in oil；
The greasy dirt on fiber grain is removed using normal hexane；
The fiber grain of degreasing is placed in index-matching fluid；
The fiber grain sample for preparing is placed in into the microscope carrier of observation platform；
The dispersion dye image of adjustment microscopic fiber grain.
Further, the microscope is polarizing microscope；The light source of the polarizing microscope is nature polarized light.
Further, the fiber grain is the transformer oil or the transformation that takes of scene by filtering accelerating thermal aging test
Device oil is obtained.
Further, the index-matching fluid is the commercial product purchased.
Further, shield type dispersion dyeing object lens centered on the object lens of the polarizing microscope.
Further, diaphragm is configured with the center shield type dispersion dyeing object lens of the polarizing microscope, it is vertical for shielding
Straight incident illumination.
As a result of above-mentioned technical proposal, the present invention has the advantage that：
The method of fiber grain dispersion dye image in the observation transformer insulation oil that the present invention is provided, in effectively utilizes oil
Fiber obtaining the ageing state of insulating paper, using the microscopic platform that object lens are dyeed with dispersion, by the sight of standard
Test sample this manufacture method, can effectively observe fiber dispersion dye image in the oil of different ageing steps, obtain fine in oil
The reflection aging information of insulating paper entrained by dimension dispersion dye image, and then to extract and transformer insulating paper degree of aging phase
The characteristic parameter of pass lays the foundation.The method has originality and pioneering, in terms of transformer fault monitoring and state estimation
With larger application prospect.
Other advantages of the present invention, target and feature will be illustrated in the following description to a certain extent, and
And to a certain extent, based on will be apparent to those skilled in the art to investigating hereafter, Huo Zheke
To be instructed from the practice of the present invention.The present invention target and other advantages can be realized by description below and
Obtain.
Description of the drawings
The description of the drawings of the present invention is as follows.
Fig. 1 is Observation principle schematic diagram.
Fig. 2 is observation flow chart.
In figure：1 be dispersion dyeing object lens, 2 be diaphragm, 3 be fiber grain, 4 be index-matching fluid, 5 be polarized light, 6
It is microscope slide for coverslip, 7.
Specific embodiment
With reference to the accompanying drawings and examples the invention will be further described.
Embodiment 1
As illustrated, fiber dispersion dye image observation procedure in the transformer oil of the present embodiment offer, including following step
Suddenly：
Filter the fiber grain 3 that transformer insulation oil is obtained in oil；
The greasy dirt on fiber grain is removed using normal hexane；
The fiber grain 3 of degreasing is placed in index-matching fluid 4；
The fiber grain sample for preparing is placed in into the microscope carrier of observation platform；
The dispersion dye image of adjustment microscopic fiber grain.
The microscope is polarizing microscope；The light source of the polarizing microscope is nature polarized light.
The fiber grain 3 is that the transformer oil that the transformer oil by filtering accelerating thermal aging test or scene take is obtained
Arrive.
The index-matching fluid 4 is the commercial product (U.S. CargilleLabs offers) purchased.
Shield type dispersion dyeing object lens 1 centered on the object lens of the polarizing microscope.
In the center shield type dispersion dyeing object lens of the polarizing microscope diaphragm 2 is configured with (for shielding specific band
Spectrum), for shielding vertical incidence light.
Embodiment 2
The method of fiber grain dispersion dye image, flat using observation in the observation transformer insulation oil that the present embodiment is provided
The sample manufacture method of platform and standard observes the purpose of fiber dispersion dye image in oil to reach；Including observation platform and observation
The manufacture method of sample；Observation platform is by the professional polarizing microscope that object lens are dyeed with dispersion and the computer for matching and software
Constitute, Observation principle and schematic device are as shown in Figure 1；Index-matching fluid 4 is arranged between coverslip 6 and microscope slide 7, tool
Body step is as follows：
First, the fiber to be measured made is placed in be measured under polarizing microscope.
Then, with nature polarized light 5 as polarizing microscope light source, when polarized light is by fiber and index-matching fluid two
When planting the interface of material, because the difference of two kinds of material refractive indexes, light can occur dispersion phenomenon, that is, deviate original vertical biography
Direction is broadcast, only when two kinds of material refractive indexes are equal, light just may proceed to along original vertically propagating.
Again, because material for the light of different wave length (color) have different refractive indexs, therefore, only when
When the refractive index of two kinds of materials is equal, the light of corresponding wavelength just understands vertical incidence, and the light of other wavelength occurs different angles
Deviate.And diaphragm (center baffle) is configured with microscopical center shield type dispersion dyeing object lens, it can be by vertical incidence
Ripple mask, the ripple of other wavelength will be left behind in the visual field, and produce the image of certain color.
Finally, when the refractive index of fiber changes with ageing time, its dispersion curve is bent with the dispersion of standard refraction rate liquid
The intersection point of line will change, therefore the wavelength (color) of the corresponding ripple masked by center shield type dispersion object lens also can be with
Change, remainder also will change into the remaining wave band in the visual field, namely also can change into the light color in the visual field, show as
Dispersion dye image.Therefore, it can reflect the change of refractive index with the color of dispersion dye image, and then reflect insulating paper
Ageing state.
Based on principle above, sample makes and observation flow process is as shown in Figure 2.First, filter transformer insulation oil to obtain
Fiber in oil, recycles normal hexane to remove the greasy dirt on fiber, in case the image obtained by disturbance-observer, then by degreasing
Fiber be placed in specific index-matching fluid, on the microscope slide that the fiber samples made are placed on microscope carrier
7, covered 6 finally adjusts microscope, and with eyepiece and correspondence Computer-generated images software the dispersion dye image of fiber is observed.
Finally illustrate, above example is only unrestricted to illustrate technical scheme, although with reference to compared with
Good embodiment has been described in detail to the present invention, it will be understood by those within the art that, can be to the skill of the present invention
Art scheme is modified or equivalent, and without deviating from the objective and scope of the technical program, it all should cover in the present invention
Protection domain in the middle of.
Claims (5)
1. fiber dispersion dye image observation procedure in a kind of transformer oil, it is characterised in that：Comprise the following steps：
Filter the fiber grain that transformer insulation oil is obtained in oil；
The greasy dirt on fiber grain is removed using normal hexane；
The fiber grain of degreasing is placed in index-matching fluid；
The fiber grain sample for preparing is placed in into the microscope carrier of observation platform；
The dispersion dye image of adjustment microscopic fiber grain.
2. fiber dispersion dye image observation procedure in transformer oil as claimed in claim 1, it is characterised in that：It is described micro-
Mirror is polarizing microscope；The light source of the polarizing microscope is nature polarized light.
3. fiber dispersion dye image observation procedure in transformer oil as claimed in claim 1, it is characterised in that：The fiber
Granule is that the transformer oil by filtering accelerating thermal aging test or scene take what transformer oil was obtained.
4. fiber dispersion dye image observation procedure in transformer oil as claimed in claim 2, it is characterised in that：The polarisation
Shield type dispersion dyeing object lens centered on microscopical object lens.
5. fiber dispersion dye image observation procedure in transformer oil as claimed in claim 2, it is characterised in that：The polarisation
Diaphragm is configured with microscopical center shield type dispersion dyeing object lens, for shielding vertical incidence light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710140330.4A CN106680297A (en) | 2017-03-09 | 2017-03-09 | Method for observing dispersion staining images of fibers in transformer oil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710140330.4A CN106680297A (en) | 2017-03-09 | 2017-03-09 | Method for observing dispersion staining images of fibers in transformer oil |
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| Publication Number | Publication Date |
|---|---|
| CN106680297A true CN106680297A (en) | 2017-05-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710140330.4A Pending CN106680297A (en) | 2017-03-09 | 2017-03-09 | Method for observing dispersion staining images of fibers in transformer oil |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108594089A (en) * | 2018-04-28 | 2018-09-28 | 广东电网有限责任公司电力科学研究院 | The degree of polymerization detection method and device of insulating paper in a kind of transformer |
| CN112986758A (en) * | 2021-02-04 | 2021-06-18 | 国网河南省电力公司电力科学研究院 | Cellulose fiber refractive index-based insulation paper aging state evaluation platform and method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6217634B1 (en) * | 1999-08-27 | 2001-04-17 | Electric Power Research Institute, Inc. | Apparatus and method for monitoring and purifying dielectric fluids |
| CN1440827A (en) * | 2002-02-28 | 2003-09-10 | 威廉·海德里希真空设备两合公司 | Preparing device for transformer |
| CN1562449A (en) * | 2004-04-09 | 2005-01-12 | 宁波理工监测设备有限公司 | Oil-gas separation equipment of hollow fiber in use for monitoring transformer online |
| CN106268020A (en) * | 2016-09-29 | 2017-01-04 | 广东电网有限责任公司电力科学研究院 | A kind of filter the technique of fiber grain in transformer oil |
-
2017
- 2017-03-09 CN CN201710140330.4A patent/CN106680297A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6217634B1 (en) * | 1999-08-27 | 2001-04-17 | Electric Power Research Institute, Inc. | Apparatus and method for monitoring and purifying dielectric fluids |
| CN1440827A (en) * | 2002-02-28 | 2003-09-10 | 威廉·海德里希真空设备两合公司 | Preparing device for transformer |
| CN1562449A (en) * | 2004-04-09 | 2005-01-12 | 宁波理工监测设备有限公司 | Oil-gas separation equipment of hollow fiber in use for monitoring transformer online |
| CN106268020A (en) * | 2016-09-29 | 2017-01-04 | 广东电网有限责任公司电力科学研究院 | A kind of filter the technique of fiber grain in transformer oil |
Non-Patent Citations (2)
| Title |
|---|
| JING ZHANG 等: "Correlation Analysis of Dispersion Staining Color of Cellulose Fibers in Insulating Oil and Paper Degradation", 《IEEE INTERNATIONAL CONFERENCE ON HIGH NOLTAGE ENGINEERING ＆ APPLICATION》 * |
| 王玉鹏 等: "用偏光显微镜鉴定涂料及其原材料中的石棉", 《上海涂料》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108594089A (en) * | 2018-04-28 | 2018-09-28 | 广东电网有限责任公司电力科学研究院 | The degree of polymerization detection method and device of insulating paper in a kind of transformer |
| CN108594089B (en) * | 2018-04-28 | 2020-09-01 | 广东电网有限责任公司电力科学研究院 | Method and device for detecting polymerization degree of insulating paper in transformer |
| CN112986758A (en) * | 2021-02-04 | 2021-06-18 | 国网河南省电力公司电力科学研究院 | Cellulose fiber refractive index-based insulation paper aging state evaluation platform and method |
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Application publication date: 20170517 |