CN110031443A - A kind of portable oil paper insulation ageing state Raman spectrum diagnostic device and method - Google Patents
A kind of portable oil paper insulation ageing state Raman spectrum diagnostic device and method Download PDFInfo
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- CN110031443A CN110031443A CN201910300861.4A CN201910300861A CN110031443A CN 110031443 A CN110031443 A CN 110031443A CN 201910300861 A CN201910300861 A CN 201910300861A CN 110031443 A CN110031443 A CN 110031443A
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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
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/65—Raman scattering
Abstract
A kind of portable oil paper insulation ageing state Raman spectrum diagnostic device and method, described device includes damping isolation optical platform (1), laser (5), light path system (4), camera (6), object lens (7), adjustable objective table (9), cuvette (8), spectrometer (3), CCD (2) and computer (10), laser is issued by laser (5), it is focused on sample by light path system (4) through object lens (7), focus condition is observed in cooperation camera (6)；Sample is adjusted at a distance from object lens (7) by adjustable objective table (9) when focusing, and laser is focused in the sample to be tested contained by cuvette (8), the stable Raman scattering signal of excitation sample；The Raman diffused light of sample is acquired by light path system (4) by spectrometer (3) and CCD (2), then is passed to computer (10) and is shown, analyzed, stored.The diagnostic device and method are suitble to the in situ detection new method of transformer oil Aging of Oil-paper Insulation in Oil monitoring, and it is horizontal to improve transformer oil Aging of Oil-paper Insulation in Oil on-line monitoring.
Description
Technical field
The invention belongs to insulation of electrical installation on-line monitoring and fault diagnosis fields, and in particular to oil paper insulation ageing state
Raman spectrum diagnostic device and method
Background technique
During paper oil insulation equipment runs aging, insulating oil and insulating paper can decompose and generate CO, CO, chaff
The substance of the reflection degree of aging such as aldehyde, methanol, acetone is simultaneously dissolved in oil, makes to be able to reflect insulation ag(e)ing containing a large amount of in insulating oil
The information of state analyzes aging characteristics in oil, and then Accurate Diagnosis paper oil insulation material aging degree, can become for oil immersed type
The whole-life cycle fee of electric equipment provides foundation, is to improve utilization rate of equipment and installations, reduce overhaul of the equipments expense, lifting means O&M
One of critical issue that is intelligent and guaranteeing power grid security production.The existing still main ginseng of oil paper insulation ageing state diagnosis
It examines the threshold value of the single aging character parameter such as furfural, acetone, degree of polymerization or based on dissolved gas analysis method, calculated
Journey is sufficiently complex and diagnosis accuracy is to be improved, and scene can be carried out to operation paper oil insulation ageing equipment state by not yet being formed
The effective ways of diagnosis.On the other hand, the insulation ag(e)ing characteristic body dissolved in the different oil of detection (electrification or offline) also rests on
It with the level of different device analysis different characteristic objects, and is needed after being separated in oil or extracting characteristic body mostly, by people
Work is analyzed in laboratory and is completed, and required equipment is various, detection program is complicated, can not achieve in situ detection in oil.For this existing
Shape, this project propose a kind of completely new paper oil insulation aging Raman spectrum diagnostic method.
Raman spectroscopy is a kind of spectroscopic analysis methods of the Ramam effect based on spectrum, and different material is due to structure, property
Matter, the difference of content, will generate different Raman signals when by laser irradiation, to realize the analysis of material property.
In the ageing process of paper oil insulation, oil in substance classes it is various and it is continuous occur a series of complex chemical change, Raman
Spectral technique can exactly embody this complex process, although rarely having research in this field, really paper oil insulation aging is supervised for it
A kind of technological means of great potential in survey.
Summary of the invention
The present invention is based on Raman spectrum testing principles to carry out in situ detection to transformer insulation oil, utilizes optical filter, light splitting
Device volume is reduced in the combination of mirror, reflecting mirror, other light path system components is cooperated to realize focusing and the transformer oil sample of laser
The collection of Raman diffused light, detection aequum is few, is that a kind of in situ detection of suitable transformer oil Aging of Oil-paper Insulation in Oil monitoring is newly square
Method is problem in the urgent need to address at present, and to being promoted, transformer oil Aging of Oil-paper Insulation in Oil on-line monitoring is horizontal to have important
Art value and practical significance.
A kind of portable oil paper insulation ageing state Raman spectrum diagnostic device, described device include that damping isolation optics is flat
Platform 1, laser 5, light path system 4, camera 6, object lens 7, adjustable objective table 9, cuvette 8, spectrometer 3, CCD 2 and computer
10, laser is issued by laser 5, is focused on sample by light path system 4 through object lens 7, and cooperation camera 6 observes focus condition；
When focusing by adjustable objective table 9 adjust sample at a distance from object lens 7, by laser focus on by cuvette 8 contain to test sample
In product, the stable Raman scattering signal of excitation sample；The Raman diffused light of sample is by light path system 4 by spectrometer 3 and CCD 2
Acquisition, then be passed to computer 10 and shown, analyzed, stored.
Preferably, laser is focused on to the sample to be tested lower face 1-2mm contained by cuvette 8.Described device with
Reflection mode collects Raman scattering optical signal from sample.The adjustable objective table 9 be the adjustable objective table of piezoelectric ceramics nanometer, x,
Y, 3 axis of z is adjustable.The camera 6 has lighting device, is used to illuminate when adjusting and focusing, to observe laser in sample surfaces
Focus condition, guarantee accurate focus.The object lens 7 are telephoto lens.The laser 5 swashs for 785nm wavelength super continuous spectrums
Light device, continuous power output reach 400mW, power stability < 1%.The focal length of the spectrometer 3 is 100mm, is furnished with 600g/
Mm, 750nm balzed grating, monochromator.The light path system 4 include multiple reflecting mirror 411-414, multiple spectroscope 431-432 with
And optical filter 42.The cuvette 8 seals after containing sample to be tested.
A kind of portable oil paper insulation ageing state Raman spectrum diagnostic method, includes the following steps: first, utilizes such as power
Benefit require 1 described in portable oil paper insulation ageing state Raman spectrum diagnostic device obtain the paper oil insulations of different ageing states
The raman spectrum of sample；And record the parameter of all parts in the device；Second, choose covering major oil Aging of Oil-paper Insulation in Oil feature
The wave number section of object Raman signal is gone forward side by side line number Data preprocess as the characteristic waves section of paper oil insulation sample；Third is established different
The paper oil insulation Raman fingerprint database of ageing state；4th, when diagnosing to sample to be tested, portable paper oil insulation is set first
The parameter of ageing state Raman spectrum diagnostic device all parts is identical as when establishing database, then using the device obtain to
The raman spectrum of sample；5th, the wave number section of covering major oil Aging of Oil-paper Insulation in Oil characteristic body Raman signal is chosen as to be measured
The characteristic waves section of sample is gone forward side by side line number Data preprocess；6th, refer in the paper oil insulation Raman for the different ageing states established
The raman spectrum closest with sample to be tested is searched out in line database, corresponding to raman spectrum immediate in database
Paper oil insulation sample ageing state as diagnostic result export.
Preferably, when the paper oil insulation Raman fingerprint database for establishing different ageing states, it is first depending on national mark
The oil paper insulation ageing state test method that standard is recommended carries out ageing state division to the paper oil insulation sample of different ageing states,
The raman spectrum with ageing state label is stored in paper oil insulation Raman spectrum fingerprint database again.The national standard is recommended
Oil paper insulation ageing state test method be the degree of polymerization test.The paper oil insulation Raman spectrum for establishing different ageing states
Fingerprint database is covered from insulation well to the sample of different ageing steps during failure of insulation.Used in described device
The paper oil insulation aging character object Raman signal that the laser that wavelength is 785nm excites, wave-number range is in 400-3000cm-1。
Laser 5 laser power 400mW, the time for exposure 0.3s accumulate 10 times and take average spectrum.The paper oil insulation sample and to
Sample is sealed after being fitted into the cuvette 8.The data prediction includes at deglitch, baseline deduction and denoising
Reason.The deglitch is less than 2cm by the brings width such as cosmic ray to eliminate-1The interference of high-intensitive spike, can intuitively hand
It is dynamic to deduct, it can also be eliminated by consecutive points method of substitution, the local weighted Return Law of robust, disadvantage Polynomial Filter method or circulation
Method method is eliminated.The baseline deduction with eliminate fluorescence background interference, to the starting point of spectrum, terminal, the starting point of spectral peak, terminal into
Row fitting of a polynomial can deduct it after calculating the baseline of spectrum from former spectrum.The denoising is shaken with eliminating by instrument
The brings noise jamming such as dynamic, can be filtered by the sliding window method of average, sliding window median method or Savitzky-Golay
The removal of wave method.
Detailed description of the invention
Technical scheme of the present invention is further explained with reference to the accompanying drawing.
Fig. 1 is the structural schematic diagram of the portable oil paper insulation ageing state Raman spectrum diagnostic device of the present invention；
Fig. 2 is the practical paper oil insulation sample and its Raman spectrogram obtained in example of the invention.
In Fig. 1:
1- damping isolation optical platform, 2-CCD, 3- spectrometer, 4- light path system, 411- reflecting mirror Isosorbide-5-Nitrae 12- reflecting mirror
2,413- reflecting mirrors 3,414- reflecting mirror 4,42- optical filter, 431- spectroscope Isosorbide-5-Nitrae 32- spectroscope 2,5- laser, 6- camera
And illumination, 7- object lens, 8- cuvette, 9- is adjustable objective table, 10- computer.
Specific embodiment
With reference to the accompanying drawings of the specification and technical solution of the present invention is described in further detail in specific embodiment.
The present invention is proposed to realize by the Raman signal for detecting transformer oil and be carried out to the ageing state of paper oil insulation
Monitoring.Mechanism are as follows: when incident laser radiation of the material molecule by certain frequency, scatter, only most light is
Change direction scatters, and the frequency of light is identical as the frequency of exciting light, is elastic scattering, i.e. Rayleigh scattering；Have one simultaneously
Fraction light not only changes the direction of propagation of light, but also the frequency for scattering light is also changed, and belongs to inelastic scattering, i.e.,
Raman scattering.Scattering the difference on the frequency between light and incident light becomes Raman shift, and Raman shift depends on the vibration level of molecule
Variation, it is the foundation that can be used as molecular structure judgement that different chemical bonds or gene, which have the molecular vibration of feature,.With oilpaper
The aging character object of the aging of insulation, oil and paper will be all dissolved into oil, judge ageing state by the Raman detection to oil,
Realize the paper insulated ageing state monitoring of transformer oil.
In one embodiment, it realizes the technical scheme is that a kind of portable oil paper insulation ageing state Raman
Spectroscopic diagnostics device is as shown in Figure 1, the device includes damping isolation optical platform 1, laser 5, (optical filter divides light path system 4
Light microscopic, reflecting mirror), object lens 7, camera 6, adjustable objective table 9, cuvette 8, spectrometer 3, CCD 2 and computer 10.Laser by
Laser 5 issues, and by light path system 4, camera 6 is cooperated to observe, and adjusts adjustable objective table 9 and oil sample to be measured and object lens 7 is arranged
Laser is focused on the oil sample surface to be measured contained by quartz colorimetric utensil 8, excites the Raman scattering of oil sample to be measured by distance；It is to be measured
The Raman diffused light of oil sample is acquired by light path system 4 by spectrometer 3 and CCD 2, then is passed in computer 10 and is shown
Show, analyze.
It the parameter of all parts and is recorded in setting device, the oilpaper for obtaining different ageing states using the device is exhausted
The raman spectrum of edge sample chooses the wave number section of covering major oil Aging of Oil-paper Insulation in Oil characteristic body Raman signal as paper oil insulation sample
The characteristic waves section of product is gone forward side by side line number Data preprocess (deglitch, baseline deduction, denoising), and the oilpaper of different ageing states is established
Insulate Raman fingerprint database.
When to sample to be tested diagnosis, the parameter of all parts is identical as when establishing database first in setting device, then
The raman spectrum of sample to be tested is obtained using the present apparatus, chooses the wave number of covering major oil Aging of Oil-paper Insulation in Oil characteristic body Raman signal
The characteristic waves section of Duan Zuowei paper oil insulation sample is gone forward side by side line number Data preprocess (deglitch, baseline deduction, denoising), is then existed
The raman spectrum closest with it is searched out in the paper oil insulation Raman fingerprint database for the different ageing states established, with
The ageing state of paper oil insulation sample corresponding to immediate raman spectrum is exported as diagnostic result in library.
The adjustable objective table 9 is the adjustable objective table of piezoelectric ceramics nanometer, and 3 axis of x, y, z is adjustable, 100 μ of open loop stroke
M, open loop resolution ratio 0.4nm；80 μm of closed loop stroke, closed loop resolution ratio 4nm；Closed loop repeatability (representative value): 30nm guarantees
The enough accurate laser that focuses carries out Raman detection in insulating oil.
The object lens 7 are focal length 50X object lens, focal length 8.2mm, NA=0.5；It ensure that and paper oil insulation sample is carried out
Safe distance when Raman detection between camera lens and insulating oil is abundant, reduces the insulation revealed, volatilized in long-term use process
Pollution of the oil to camera lens.Wherein, NA is the Common Parameters of object lens: numerical aperture characterizes the light gathering of object lens, is the weight of object lens
One of property is wanted, is usually indicated with " NA ".The numerical aperture size of object lens determine object lens resolution capability (identification) and effectively
Amplification factor.
The laser 5 be wavelength be 785nm single-frequency single mode transverse mode (TEM00), peak power output 400mW,
Power stability: < 1%, the micro stronger Raman signal of characteristic body is excited to guarantee to stablize, while can preferably control
The interference of fluorescence background.
The focal length of the spectrometer 3 is 100mm, is furnished with 600g/mm, 750nm balzed grating, monochromator, to guarantee to use
The laser 5 that wavelength is 785nm reaches preferable collecting effect when exciting the Raman scattering of paper oil insulation sample.
The cuvette 8 is quartz colorimetric utensil, shell sizes: 30mm*10mm*5mm, sample cell size: 21mm*
8mm*3mm contains transformer oil about 0.5ml every time, can seal.Corrosion resistance is strong, can be respectively subjected to 6mol/L hydrochloric acid, anhydrous
Ethyl alcohol, carbon tetrachloride and the not degumming of medium etch 24 hours of four kinds of benzene.It is resistant to the corrosion of complicated ingredient in transformer oil, together
It is chemically reacted Shi Buyu, can preferably save transformer oil sample.In addition quartz material ensure that in Raman detection
Lack to interfere the Raman signal of insulating oil as far as possible.
The light path system 4 includes optical filter, spectroscope, reflecting mirror, by reasonably optimizing the arrangement of in mesa dimensions
For on the damping isolation optical platform 1 of 2400*1200*200mm, the miniature spectrometer 3 of collocation 100mm focal length carries out Raman signal
Collection, guarantee the miniaturization and portability of device.
Camera 6 has white-light illuminating, and capable of emitting white light is reflected into spectroscope 432 through reflecting mirror 414 and is shone again by object lens 7
It is mapped on sample.Reflected light on sample can be recorded through backtracking by camera, and the effect of focusing is observed with this.
Laser is issued by laser 5, is reflected into spectroscope 431 by reflecting mirror 413 and is reflected and penetrate spectroscope 432 again,
It is focused on sample to be tested eventually by object lens 7.The Raman diffused light that sample is excited passes through spectroscope 432 after object lens 7
With spectroscope 431 and optical filter 42, reflecting mirror 411 is then reflected by reflecting mirror 412, finally by spectrometer 3 and 2 institute of CCD
It collects.
This structure not only ensure that accurately focusing but also can effectively collect the Raman diffused light of sample, also assure simultaneously
Lesser volume.Wherein optical filter 42, spectroscope 431 and spectroscope 432 are the high pass filter (edge of different model
Filter), the name of all parts is depending on its effect in the present system.
In the Raman spectrum transformer oil paper insulation ageing state field diagnostic method, insulating oil Raman spectrum is being obtained
When need to insulation oil samples be initially charged in quartz colorimetric utensil 8 and be sealed, then adjustment laser is focused in insulating oil and is drawn
Graceful detection.It avoids insulation oil samples to contact with the excessive of air, decreases the volatilization of certain characteristic bodies (such as furfural).
In the Raman spectrum transformer oil paper insulation ageing state field diagnostic method, what the cooperation present apparatus was chosen covers
The wave number section 400-3000cm of lid major oil Aging of Oil-paper Insulation in Oil characteristic body Raman signal-1.Wherein, the unit of Raman frequency shift is exactly wave
Number (i.e. unit " the cm of abscissa-1"), wave number section refers to wave number in a segment limit such as 400-3200cm-1。
In the Raman spectrum transformer oil paper insulation ageing state field diagnostic method, data prediction includes:
Spike, baseline deduction, denoising.Specific explanations are as follows: deglitch: in the acquisition for carrying out Raman signal to paper oil insulation sample
When, due to, there are cosmic ray or some substances that can radiate emergent ray, causing in original Raman signal in detection environment
There are some width to be less than 2cm-1High-intensitive spike；It is more that the local weighted Return Law of consecutive points method of substitution, robust, disadvantage can be used
The methods of item formula filter method, circulation elimination approach are eliminated.Baseline deduction: the baseline in insulating oil Raman spectrum is mainly by oil
In fluorescent material, the black body radiation of cuvette 8 and ambient enviroment etc. generate, the presence of baseline will affect point of subsequent spectrum
Effect is analysed, needs to be deducted in preprocessing process；Multinomial is carried out to the starting point of spectrum, terminal, the starting point of spectral peak, terminal
Fitting, can deduct it after calculating the baseline of spectrum from former spectrum.Denoising: the hair in exciting light and Raman diffused light
Penetrate the echo signal that the noise sources such as noise, the shot noise of detector and dark current can flood in Raman spectrum；To remove light
Noise signal in spectrum, improve spectral signal-noise ratio, can with the sliding window method of average, sliding window median method and
Savitzky-Golay filter method etc..
In the Raman spectrum transformer oil paper insulation ageing state field diagnostic method, different ageing states are established
When paper oil insulation Raman fingerprint database, it should cover from insulation well to the sample of ageing steps different during failure of insulation,
Sample size is more, and the wider coverage area the better.
The paper oil insulation Raman fingerprint database of the different ageing states is established: the first step, passes through accelerated ageing reality
The paper oil insulation sample that the mode combined with field sampling obtains a large amount of different degree of agings is tested, the degree of aging of sample should use up
Possibly cover entire ageing process.Second step carries out degree of polymerization test to sample, and divides degree of aging according to the degree of polymerization
(aging label).The first kind: insulation is good (degree of polymerization>800 are indicated with " 1 "), the second class: aging initial stage (500<degree of polymerization<
800, indicated with " 2 "), third class: aging mid-term (250 < degree of polymerization < 500 are indicated with " 3 "), the 4th class: aging latter stage (polymerization
Degree < 250 is indicated with " 4 ").Third step, setting device parameter and the Raman spectrum data (test condition are as follows: swash for obtaining a sample
Optical power 400mW, time for exposure 0.3s, cumulative number 10 times).The high power of 400mW is micro old in insulating oil to guarantee
Change characteristic body to be easier to be detected, the time for exposure of 0.3s ensures that the Raman signal of all insulating oils is all unlikely to be saturated, and tires out
It accumulates 10 times and takes average spectrum to eliminate the interference of most random noises, guarantee higher signal-to-noise ratio.4th step chooses covering
The wave number section of major oil Aging of Oil-paper Insulation in Oil characteristic body Raman signal as paper oil insulation sample characteristic waves section and carry out data
It pre-processes (deglitch, baseline deduction, denoising).5th step arranges in pairs or groups the Raman spectrum data of each sample after treatment
Corresponding aging label input database together.
In the Raman spectrum transformer oil paper insulation ageing state field diagnostic method, when being diagnosed to sample to be tested,
The raman spectrum of sample to be tested is detected first, chooses 400-3000cm-1Characteristic waves section as paper oil insulation sample is (such as
Shown in Fig. 2) line number of going forward side by side Data preprocess (deglitch, baseline deduction, denoising), then in the different ageing states established
The raman spectrum closest with it is searched out in paper oil insulation Raman fingerprint database, with raman spectrum institute immediate in library
The ageing state of corresponding paper oil insulation sample is exported as diagnostic result.
Portable oil paper insulation ageing state Raman spectrum diagnostic device structure is as shown in Figure 1, benefit designed by the present invention
The Raman map of the paper oil insulation sample of the different ageing steps acquired in the present apparatus is as shown in Fig. 2, use test data pair
The verification result of diagnostic model is as shown in table 1, and the Average Accuracy diagnosed to 105 test samples is 87.6% (92/
105)；It can satisfy the demand of actual use.
The diagnostic result of 1. 105 test samples of table
Applicant combines Figure of description to be described in detail and describe the embodiment of the present invention, but this field skill
Art personnel are it should be understood that above embodiments are only the preferred embodiments of the invention, and explanation is intended merely to help reader in detail
More fully understand spirit of that invention, and it is not intended to limit the protection scope of the present invention, on the contrary, any based on invention essence of the invention
Any improvement or modification made by mind should all be fallen within the scope and spirit of the invention.
Claims (21)
1. a kind of portable oil paper insulation ageing state Raman spectrum diagnostic device, which is characterized in that described device includes damping
Vibration isolation optical platform (1), laser (5), light path system (4), camera (6), object lens (7), adjustable objective table (9), cuvette
(8), spectrometer (3), CCD (2) and computer (10), laser is issued by laser (5), by light path system (4) through object lens (7)
It focuses on sample, focus condition is observed in cooperation camera (6)；Sample and object lens (7) are adjusted by adjustable objective table (9) when focusing
Distance, laser is focused in the sample to be tested contained by cuvette (8), the stable Raman scattering signal of excitation sample；Sample
The Raman diffused light of product is acquired by light path system (4) by spectrometer (3) and CCD (2), then is passed to computer (10) and is shown
Show, analyze, store.
2. a kind of portable oil paper insulation ageing state Raman spectrum diagnostic device according to claim 1, feature exist
In laser to be focused on to the sample to be tested lower face 1-2mm contained by cuvette (8).
3. a kind of portable oil paper insulation ageing state Raman spectrum diagnostic device according to claim 1, feature exist
In described device collects Raman scattering optical signal from sample in reflection.
4. a kind of portable oil paper insulation ageing state Raman spectrum diagnostic device according to claim 1, feature exist
In the adjustable objective table (9) is the adjustable objective table of piezoelectric ceramics nanometer, and 3 axis of x, y, z is adjustable.
5. a kind of portable oil paper insulation ageing state Raman spectrum diagnostic device according to claim 1, feature exist
In the camera (6) has lighting device, is used to illuminate when adjusting and focusing, to observe laser in the focusing of sample surfaces
Situation guarantees accurate focus.
6. a kind of portable oil paper insulation ageing state Raman spectrum diagnostic device according to claim 1, feature exist
In the object lens (7) are telephoto lens.
7. a kind of portable oil paper insulation ageing state Raman spectrum diagnostic device according to claim 1, feature exist
It is 785nm wavelength super continuous spectrums laser in, the laser (5), continuous power output reaches 400mW, power stability <
1%.
8. a kind of portable oil paper insulation ageing state Raman spectrum diagnostic device according to claim 1, feature exist
In the focal length of the spectrometer (3) is 100mm, is furnished with 600g/mm, 750nm balzed grating, monochromator.
9. a kind of portable oil paper insulation ageing state Raman spectrum diagnostic device according to claim 1, feature exist
In the light path system (4) includes multiple reflecting mirrors (411-414), multiple spectroscopes (431-432) and optical filter 42.
10. a kind of portable oil paper insulation ageing state Raman spectrum diagnostic device according to claim 1, feature exist
In the cuvette (8) is sealed after containing sample to be tested.
11. a kind of portable oil paper insulation ageing state Raman spectrum diagnostic method, which comprises the steps of:
First, it is obtained using portable oil paper insulation ageing state Raman spectrum diagnostic device as described in claim 1 different
The raman spectrum of the paper oil insulation sample of ageing state；And record the parameter of all parts in the device；
Second, choose feature of the wave number section of covering major oil Aging of Oil-paper Insulation in Oil characteristic body Raman signal as paper oil insulation sample
Wave number section is gone forward side by side line number Data preprocess；
Third establishes the paper oil insulation Raman fingerprint database of different ageing states；
4th, when diagnosing to sample to be tested, it is each that portable oil paper insulation ageing state Raman spectrum diagnostic device is set first
The parameter of component is identical as when establishing database, and the raman spectrum of sample to be tested is then obtained using the device；
5th, choose characteristic waves of the wave number section of covering major oil Aging of Oil-paper Insulation in Oil characteristic body Raman signal as sample to be tested
Duan Bingjin line number Data preprocess；
6th, it is searched out with sample to be tested the most in the paper oil insulation Raman fingerprint database for the different ageing states established
Close raman spectrum, the ageing state of paper oil insulation sample corresponding to immediate raman spectrum is as examining using in database
Disconnected result output.
12. portable oil paper insulation ageing state Raman spectrum diagnostic method as claimed in claim 11, which is characterized in that institute
When stating the paper oil insulation Raman fingerprint database for establishing different ageing states, the paper oil insulation for being first depending on national standard recommendation is old
Change state test method and ageing state division is carried out to the paper oil insulation sample of different ageing states, then ageing state mark will be had
The raman spectrum of label is stored in paper oil insulation Raman spectrum fingerprint database.
13. portable oil paper insulation ageing state Raman spectrum diagnostic method as claimed in claim 12, which is characterized in that institute
The oil paper insulation ageing state test method of national standard recommendation is stated as degree of polymerization test.
14. portable oil paper insulation ageing state Raman spectrum diagnostic method as claimed in claim 11, which is characterized in that institute
The paper oil insulation Raman spectrum fingerprint database for establishing different ageing states is stated, is covered from insulation well to during failure of insulation
The sample of different ageing steps.
15. portable oil paper insulation ageing state Raman spectrum diagnostic method as claimed in claim 11, which is characterized in that institute
State the paper oil insulation aging character object Raman signal that the laser that wavelength used in device is 785nm excites, wave-number range
In 400-3000cm-1。
16. portable oil paper insulation ageing state Raman spectrum diagnostic method as claimed in claim 11, which is characterized in that institute
Laser (5) laser power 400mW, time for exposure 0.3s is stated, accumulates 10 times and takes average spectrum.
17. portable oil paper insulation ageing state Raman spectrum diagnostic method as claimed in claim 11, which is characterized in that institute
State paper oil insulation sample and sample to be tested be fitted into the cuvette (8) after sealed.
18. portable oil paper insulation ageing state Raman spectrum diagnostic method as claimed in claim 11, which is characterized in that institute
Stating data prediction includes deglitch, baseline deduction and Denoising disposal.
19. portable oil paper insulation ageing state Raman spectrum diagnostic method as claimed in claim 18, which is characterized in that institute
Deglitch is stated to eliminate and be less than 2cm by the brings width such as cosmic ray-1High-intensitive spike interference, can intuitively detain manually
It removes, consecutive points method of substitution, the local weighted Return Law of robust, disadvantage Polynomial Filter method or circulation elimination approach side can also be passed through
Method is eliminated.
20. portable oil paper insulation ageing state Raman spectrum diagnostic method as claimed in claim 18, which is characterized in that institute
Baseline deduction is stated to eliminate fluorescence background interference, fitting of a polynomial is carried out to the starting point of spectrum, terminal, the starting point of spectral peak, terminal,
It can be deducted from former spectrum after calculating the baseline of spectrum.
21. portable oil paper insulation ageing state Raman spectrum diagnostic method as claimed in claim 18, which is characterized in that institute
Denoising is stated to eliminate by brings noise jammings such as instrument vibrations, the sliding window method of average, sliding window median can be passed through
Method or the removal of Savitzky-Golay filter method.
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| CN111537845A (en) * | 2020-04-26 | 2020-08-14 | 云南电网有限责任公司电力科学研究院 | Method for identifying aging state of oil paper insulation equipment based on Raman spectrum cluster analysis |
| CN112485609A (en) * | 2020-10-19 | 2021-03-12 | 重庆大学 | Raman spectrum diagnosis method for insulation aging of transformer oil paper |
| CN112557834A (en) * | 2020-10-19 | 2021-03-26 | 重庆大学 | Aging diagnosis method for oiled paper insulation equipment based on Raman spectrum |
| CN113985218A (en) * | 2021-09-20 | 2022-01-28 | 重庆大学 | Oil paper insulation aging diagnosis method based on fluorescent color |
| CN114062346A (en) * | 2021-11-08 | 2022-02-18 | 吉林大学 | In-situ high-pressure laser heating system |
| CN114062342A (en) * | 2020-07-30 | 2022-02-18 | 顶极科技股份有限公司 | Quality change detection system and method for semiconductor process spare and accessory parts |
| CN115389485A (en) * | 2022-10-26 | 2022-11-25 | 中国科学技术大学 | Raman microscopic equipment and Raman spectrum detection method |
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