CN111999259A - Composite insulator aging degree evaluation method based on infrared spectrum - Google Patents
Composite insulator aging degree evaluation method based on infrared spectrum Download PDFInfo
- Publication number
- CN111999259A CN111999259A CN202010733165.5A CN202010733165A CN111999259A CN 111999259 A CN111999259 A CN 111999259A CN 202010733165 A CN202010733165 A CN 202010733165A CN 111999259 A CN111999259 A CN 111999259A
- Authority
- CN
- China
- Prior art keywords
- composite insulator
- infrared spectrum
- absorption peak
- infrared
- aging degree
- 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
- 239000012212 insulator Substances 0.000 title claims abstract description 88
- 239000002131 composite material Substances 0.000 title claims abstract description 78
- 230000032683 aging Effects 0.000 title claims abstract description 60
- 238000002329 infrared spectrum Methods 0.000 title claims abstract description 47
- 238000011156 evaluation Methods 0.000 title claims abstract description 19
- 238000010521 absorption reaction Methods 0.000 claims abstract description 55
- 238000012360 testing method Methods 0.000 claims abstract description 37
- 229910002808 Si–O–Si Inorganic materials 0.000 claims abstract description 25
- 229920002379 silicone rubber Polymers 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 13
- 238000004364 calculation method Methods 0.000 claims abstract description 12
- 238000004566 IR spectroscopy Methods 0.000 claims abstract description 11
- 238000005070 sampling Methods 0.000 claims abstract description 6
- 238000002835 absorbance Methods 0.000 claims description 9
- 239000004945 silicone rubber Substances 0.000 claims description 4
- 230000008901 benefit Effects 0.000 abstract description 4
- 238000005259 measurement Methods 0.000 abstract description 3
- 125000000524 functional group Chemical group 0.000 description 3
- 238000005033 Fourier transform infrared spectroscopy Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 239000011368 organic material Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 238000000862 absorption spectrum Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009422 external insulation Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000002431 foraging effect Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004451 qualitative analysis Methods 0.000 description 1
- 238000004445 quantitative analysis Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- SBIBMFFZSBJNJF-UHFFFAOYSA-N selenium;zinc Chemical compound [Se]=[Zn] SBIBMFFZSBJNJF-UHFFFAOYSA-N 0.000 description 1
- 230000002087 whitening effect Effects 0.000 description 1
Images
Classifications
-
- 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
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3563—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing solids; Preparation of samples therefor
-
- 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
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N2021/3595—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light using FTIR
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Testing Relating To Insulation (AREA)
Abstract
A composite insulator aging degree evaluation method based on infrared spectrum is characterized by comprising the following steps: step 1: selecting a silicon rubber umbrella skirt as a test sample at the high-voltage end of the composite insulator to be tested and at 1/2 positions of the total length of the composite insulator, namely the middle part and the low-voltage end; step 2: carrying out Fourier infrared spectrum test on the test sample to obtain the infrared spectrum of the test sample; and step 3: calculation of Si-CH from Fourier Infrared Spectroscopy3And the infrared absorption peak area of Si-O-Si; and 4, step 4: and grading the aging degree of the composite insulator according to the calculation result. The method provided by the invention has the advantages of convenience in sampling, simplicity in measurement, accurate data and the like, and can well meet the requirements of testing and evaluating the aging degree of the composite insulator.
Description
Technical Field
The invention relates to the technical field of high-voltage insulation detection, in particular to a composite insulator aging degree evaluation method based on infrared spectroscopy.
Background
The silicon rubber composite insulator is used as an important external insulation medium of a power transmission line and has been used in China for nearly 40 years. Compared with the traditional glass insulator and ceramic insulator, the silicon rubber composite insulator has the advantages of light weight, good pollution resistance, convenience in maintenance and the like. However, the silicone rubber material is an organic material, and is different from inorganic materials such as ceramic and glass, and is affected by wind, humidity, acid-base environment and the like in natural climate, molecular bonds of the organic material are easy to break, and the silicone rubber umbrella skirt and sheath materials are gradually aged along with the increase of the operating life. After the composite insulator is aged, the surface hydrophobicity is reduced, the electrical performance and the mechanical performance are reduced, the electric corrosion resistance and pollution flashover resistance are obviously reduced, the accident rate is greatly improved, and the composite insulator is extremely unfavorable for the reliable operation of a power transmission line.
At present, a series of methods are provided for aging evaluation of the composite insulator, such as appearance inspection, hydrophobicity test and the like, but the methods are mainly evaluated from the macroscopic performance of the insulator, on one hand, the evaluation methods need artificial observation and judgment and have certain subjectivity, so that the evaluation result is not accurate and reliable; on the other hand, certain characteristics need to be observed after the insulator is aged to a certain degree, which is not beneficial to early judgment and prevention of aging. Therefore, the composite insulator aging assessment method which is objective and scientific and can judge the aging degree in the whole operation stage of the insulator is provided, and the method has certain necessity and benefit.
The Fourier infrared spectrum testing technology is to record the transition process according to the energy level transition of molecular vibration caused after a substance absorbs radiation energy to obtain the infrared absorption spectrum of the molecule. The infrared spectroscopy is an analytical method for determining the molecular structure of a substance and identifying a compound based on information such as relative vibration between atoms in a molecule and molecular rotation, and an infrared spectrogram is obtained by recording the condition that a molecule absorbs infrared light by an instrument. The infrared spectroscopy can be used for qualitative and quantitative analysis of organic compounds and functional group identification. The change conditions of the molecular structure and the content of the functional group of the silicon rubber at each aging stage of the composite insulator can be scientifically detected by using an infrared spectroscopy.
Disclosure of Invention
In order to solve the problems, the invention provides a composite insulator aging degree evaluation method based on infrared spectrum.
The invention specifically adopts the following technical scheme:
a composite insulator aging degree evaluation method based on infrared spectrum is characterized by comprising the following steps:
step 1: selecting a silicon rubber umbrella skirt as a test sample at the high-voltage end of the composite insulator to be tested, the 1/2 position (middle part) of the total length of the composite insulator and the low-voltage end of the composite insulator to be tested respectively;
step 2: carrying out Fourier infrared spectrum test on the test sample to obtain the infrared spectrum of the test sample;
and step 3: calculation of Si-CH from Fourier Infrared Spectroscopy3(silyl bond) and Si-O-Si (siloxane bond);
and 4, step 4: and grading the aging degree of the composite insulator according to the calculation result.
The invention further adopts the following preferred technical scheme:
in the step 1, when the high-voltage end is sampled, the high-voltage end is selected from the front n umbrella skirts of the high-voltage end;
when sampling the low-voltage end, selecting from the front n umbrella skirts of the low-voltage end;
when the middle part is sampled, selecting 2 umbrella skirts in the middle according to the total number of the umbrella skirts of the composite insulator, wherein the total number of the umbrella skirts is even; the total number of the umbrella skirt is odd, and the umbrella skirt is selected from 3 umbrella skirts in the middle.
Preferably, when sampling the composite insulator with the working voltage of 35kV or less, n is selected to be 1;
when the composite insulator with the voltage of more than 35kV and less than 500kV is sampled, n is 3;
when the composite insulator of 500kV or more is sampled, n is 5.
In the step 1, the silicon rubber umbrella skirt selected from the high-voltage end, the middle part and the low-voltage end of the composite insulator to be tested is cut into a test sample in a right cubic shape.
The step 2 comprises the following steps:
step 201: a test sample is not placed on the total reflection prism, and the background, namely the infrared spectrum of air and moisture, is collected firstly;
step 202: placing a test sample on a total reflection prism, and collecting an infrared spectrum;
step 203: and subtracting the infrared spectrum of the background to obtain the infrared spectrum of the test sample.
In the step 3, Si-O-Si reflects the breakage condition of the main chain of the silicon rubber of the composite insulator, and the corresponding infrared spectrum absorption peak wave number is 1000～1100cm-1(ii) a Si-CH3 reflects the side chain breakage of silicone rubber, and the corresponding infrared spectrum has an absorption peak wave number of 1260cm-1。
In the step 3, the infrared absorption peak areas of Si-CH3 and Si-O-Si are respectively calculated from the infrared spectrum chart by the following formulas:
A＝S-B
wherein S is the total area of a graph surrounded by the projection of the infrared absorption peak curve on the horizontal axis; b is the total area of the graph surrounded by the projection of the background line on the horizontal axis; a is the area of a graph surrounded by a background line and an infrared absorption peak curve; for a given peak, xL、xRWave numbers of the left and right boundary points of the peak region, respectively; y isL、yRRespectively corresponding absorbance; y isiRepresenting the corresponding absorbance when the wavenumber is i.
In step 4, the aging degree of the composite insulator is divided into the following four grades from light to heavy according to the calculation results of the infrared absorption peak areas of Si-CH3 and Si-O-Si:
aging at the I stage: Si-CH3 absorption peak area > 2;
and (2) aging at the II stage: 1< Si-CH3 absorption peak area < 2;
aging in grade III: Si-CH3 absorption peak area <1, and Si-O-Si absorption peak area > 30;
and (3) aging at the IV stage: Si-CH3 absorption peak area <1 and Si-O-Si absorption peak area < 30.
The invention has the following beneficial effects:
the invention provides a method for measuring Si-CH in silicon rubber by utilizing infrared spectrum3And the infrared absorption peak area of the characteristic functional group of Si-O-Si, thereby judging the evaluation method of the aging degree of the composite insulator; hair brushThe method has the advantages of convenience in sampling, simplicity in measurement, accurate data and the like, and can well meet the requirements of testing and evaluating the aging degree of the composite insulator.
Drawings
FIG. 1 is a flow chart of the method for evaluating aging degree of composite insulator based on infrared spectrum of the present invention.
FIG. 2 is an infrared spectrum of the composite insulator to be tested measured by the composite insulator aging degree evaluation method based on infrared spectrum of the invention.
FIG. 3 is a histogram of the absorption peak areas of Si-O-Si and Si-CH3 in the IR spectrum of the composite insulator at different operating ages measured by the IR spectrum based composite insulator aging assessment method of the present invention.
Detailed Description
The composite insulator aging degree evaluation method based on infrared spectroscopy is combined in detail according to the attached drawings.
Fig. 1 is a flowchart of the method for evaluating the aging degree of a composite insulator based on infrared spectroscopy according to the present invention, and as shown in fig. 1, the method for evaluating the aging degree of a composite insulator based on infrared spectroscopy according to the present invention comprises the following steps:
step 1: a silicon rubber umbrella skirt is selected as a test sample at the high-voltage end of the composite insulator to be tested, the 1/2 position (middle part) of the total length of the composite insulator and the low-voltage end of the composite insulator to be tested respectively.
In the step 1, the umbrella skirt with the most serious aging degree judged by naked eyes is selected, and the aging degree comprises whitening, powdering and cracking. And when sampling the high-voltage end, selecting from the front n umbrella skirts of the high-voltage end; and when the low-voltage end is sampled, selecting from the front n umbrella skirts of the low-voltage end. Wherein, for the composite insulator with working voltage of 35kV and below, n is 1; for a composite insulator with the voltage of more than 35kV and less than 500kV, n is 3; for a composite insulator of 500kV or more, n is 5. When the middle part is sampled, selecting 2 umbrella skirts in the middle according to the total number of the umbrella skirts of the composite insulator, wherein the total number of the umbrella skirts is even; the total number of the umbrella skirt is odd, and the umbrella skirt is selected from 3 umbrella skirts in the middle. And cutting the silicon rubber umbrella skirt selected from the high-voltage end, the middle part and the low-voltage end of the composite insulator to be tested into test samples of 2cm multiplied by 2 cm.
Step 2: and carrying out Fourier infrared spectrum test on the test sample to obtain the infrared spectrum of the test sample.
Performing infrared spectrum test on the test sample by using a Fourier infrared spectrometer; the infrared spectrometer is formed by sequentially connecting an infrared light source, a Michelson interferometer, a detector, an amplifier, an optical filter, a computer and the like. The infrared light source emits stable and high-intensity infrared light with continuous wavelength, and a beam of interference light is obtained after the infrared light is modulated by the Michelson interferometer; the interference light passes through the test sample and then becomes interference light with sample information; the detector can detect the interference light with the sample information; the amplifier is used for amplifying the interference light with the sample information, and the optical filter is used for filtering interference signals in the interference light with the sample information; the computer is used for collecting the interference light with the sample information to obtain a time domain interference pattern with the sample information, and the time domain interference pattern is converted into an infrared spectrogram by taking absorbance as a vertical coordinate and taking wave number as a horizontal coordinate through fast Fourier transform calculation.
In the invention, the selected infrared spectrometer Is a Nicolet Is5 type Fourier transform infrared spectrometer produced by Thermo Fisher company in America, a total reflection accessory Is applied, a total reflection prism consists of ZnSe crystals, and the scanning range Is 600-4000 cm < -1 >. The resolution and the number of scans of a fourier transform infrared spectrometer are a set of associated parameters, and the association rule is that the higher the resolution, the lower the scanning speed, and the fewer the number of scans. These two parameters can be custom set when taking measurements, for example: if the resolution is increased to 1cm-1Then the number of scanning times needs to be adjusted to 8 correspondingly; resolution is reduced to 8cm-1The number of scans correspondingly increases to 64. Due to the fact that the resolution ratio is too high, noise interference is increased, the waveform is inaccurate due to too low resolution ratio, and the infrared absorption peak area changes under the two conditions, so that certain influence is brought to subsequent calculation. Therefore, in the present invention, it is preferable to set the resolution to 4cm-1And the number of scanning times is set to 32 times for testing.In addition, the wave numbers of infrared absorption peaks corresponding to Si-CH3 and Si-O-Si are 1260cm < -1 > and 1000cm < -1 > to 1100cm < -1 > respectively.
The step 2 specifically comprises the following substeps:
step 201: a test sample is not placed on the total reflection prism, and the background, namely the infrared spectrum of air and moisture, is collected firstly;
step 202: placing a test sample on a total reflection prism, and collecting an infrared spectrum;
step 203: and subtracting the infrared spectrum of the background to obtain the infrared spectrum of the test sample.
And step 3: the infrared absorption peak areas of Si-CH3 (silyl bond) and Si-O-Si (siloxane bond) were calculated from Fourier infrared spectrograms.
And (3) carrying out graphic correction on the infrared spectrogram of the test sample obtained in the step (2). For the infrared absorption peak to be calculated, the left and right boundary points of the peak are determined, and the straight line connecting the left and right boundary points is the bottom line. The bottom line is tangent to the left end and the right end of the absorption peak curve. After the background line is determined, the corresponding infrared absorption peak area is the area of a closed graph surrounded by the background line and the infrared absorption peak curve.
A＝S-B
Wherein S is the total area of a graph surrounded by the projection of the infrared absorption peak curve on the horizontal axis and represents the sum of absorbance of each wave number in a specified peak region; b is the total area of the graph surrounded by the projection of the background line on the horizontal axis, which is called background area and represents the sum of absorbance caused by the environment background and Compton scattering; a is the infrared absorption peak area; x is the number ofL、xRWave numbers of the left and right boundary points of the peak region, respectively; y isL、yRRespectively corresponding absorbance; y isiRepresenting the corresponding absorbance when the wavenumber is i.
And 4, step 4: and grading the aging degree of the composite insulator according to the calculation result.
In step 4, the aging degree of the composite insulator is divided into the following four grades from light to heavy according to the calculation results of the infrared absorption peak areas of Si-CH3 and Si-O-Si:
aging at the I stage: Si-CH3 absorption peak area > 2;
and (2) aging at the II stage: 1< Si-CH3 absorption peak area < 2;
aging in grade III: Si-CH3 absorption peak area <1, and Si-O-Si absorption peak area > 30;
and (3) aging at the IV stage: Si-CH3 absorption peak area <1 and Si-O-Si absorption peak area < 30.
And carrying out corresponding subsequent treatment measures according to the judgment result, such as line maintenance, replacement of a seriously aged composite insulator and the like.
Fig. 2 shows an example of an infrared spectrogram of a composite insulator to be tested. Wherein the wave number of an infrared absorption peak corresponding to the Si-O-Si group is 1000cm < -1 > to 1100cm < -1 >, and the wave number of an infrared absorption peak corresponding to the Si-CH3 group is 1260cm < -1 >. Then, the infrared absorption peak areas of the two groups, i.e., the areas of the shaded portions in fig. 1, were calculated by using OMNIC software.
FIG. 3 shows histograms of absorption peak areas of Si-O-Si and Si-CH3 in IR spectra of composite insulators with different aging degrees according to the operating age. It can be seen that absorption peaks corresponding to Si-O-Si and Si-CH3 of the umbrella skirt of the operating insulator are in a descending trend along with the operating age, which shows that the aging degree of the composite insulator is gradually increased along with the increase of the operating age; further, as shown in fig. 2, the areas of the absorption peak of Si — CH3 of the insulators operated for 5 years and 9 years are both greater than 2, which indicates that the aging degree of the composite insulator is I-level aging at this time; when the insulator runs for 13 years, the Si-CH3 absorption peak area is between 1 and 2, which shows that the aging degree of the composite insulator is II-grade aging; when the insulator runs for 17 years, the Si-CH3 absorption peak area is less than 1, but the Si-O-Si absorption peak area is still more than 30, which indicates that the aging degree of the composite insulator is III-grade aging; when the insulator runs for 21 years, the absorption peak area of Si-CH3 is less than 1, and the absorption peak area of Si-O-Si is less than 30, which indicates that the aging degree of the composite insulator is IV-level aging. Further, by the above example, the aging degree grades of the composite insulator can be preliminarily divided according to the operation years, as shown in table 1.
Table 1: relationship between operation age and aging degree of composite insulator
The above description is provided only for the purpose of illustrating the present invention and not for the purpose of limiting the same, and it will be understood by those skilled in the art that equivalents and modifications may be made thereto without departing from the spirit of the present disclosure.
Claims (8)
1. A composite insulator aging degree evaluation method based on infrared spectrum is characterized by comprising the following steps:
step 1: selecting a silicon rubber umbrella skirt as a test sample at the high-voltage end of the composite insulator to be tested and at 1/2 positions of the total length of the composite insulator, namely the middle part and the low-voltage end;
step 2: carrying out Fourier infrared spectrum test on the test sample to obtain the infrared spectrum of the test sample;
and step 3: calculation of Si-CH from Fourier Infrared Spectroscopy3And the infrared absorption peak area of Si-O-Si;
and 4, step 4: and grading the aging degree of the composite insulator according to the calculation result.
2. The infrared spectrum-based composite insulator aging degree evaluation method according to claim 1, characterized in that:
in the step 1, when the high-voltage end is sampled, the high-voltage end is selected from the front n umbrella skirts of the high-voltage end;
when sampling the low-voltage end, selecting from the front n umbrella skirts of the low-voltage end;
when the middle part is sampled, selecting 2 umbrella skirts in the middle part of the composite insulator according to the total number of the umbrella skirts of the composite insulator, wherein the total number of the umbrella skirts is an even number; the total number of the pieces is odd, and the pieces are selected from 3 umbrella skirts in the middle of the composite insulator.
3. The infrared spectrum-based composite insulator aging degree evaluation method according to claim 2, characterized in that:
when the composite insulator with the working voltage of 35kV or below is sampled, n is 1;
when the composite insulator with the voltage of more than 35kV and less than 500kV is sampled, n is 3;
when the composite insulator of 500kV or more is sampled, n is 5.
4. The infrared spectrum-based composite insulator aging degree evaluation method according to any one of claims 1 to 3, characterized in that:
in the step 1, the silicon rubber umbrella skirt selected from the high-voltage end, the middle part and the low-voltage end of the composite insulator to be tested is cut into a cubic test sample.
5. The infrared spectrum-based composite insulator aging degree evaluation method according to any one of claims 1 to 3, characterized in that:
the step 2 comprises the following steps:
step 201: a test sample is not placed on the total reflection prism, and the background, namely the infrared spectrum of air and moisture, is collected firstly;
step 202: placing a test sample on a total reflection prism, and collecting an infrared spectrum;
step 203: and subtracting the infrared spectrum of the background to obtain the infrared spectrum of the test sample.
6. The infrared spectrum-based composite insulator aging degree evaluation method according to any one of claims 1 to 3, characterized in that:
in the step 3, Si-O-Si reflects the fracture condition of the main chain of the silicon rubber of the composite insulator,the wave number of the corresponding infrared spectrum absorption peak is 1000-1100 cm-1(ii) a Si-CH3 reflects the side chain breakage of silicone rubber, and the corresponding infrared spectrum has an absorption peak wave number of 1260cm-1。
7. The infrared spectrum-based composite insulator aging degree evaluation method according to any one of claims 1 to 3, characterized in that:
in the step 3, the infrared absorption peak areas of Si-CH3 and Si-O-Si are respectively calculated from the infrared spectrum chart by the following formulas:
A＝S-B
wherein S is the total area of a graph surrounded by the projection of the infrared absorption peak curve on the horizontal axis; b is the total area of the graph surrounded by the projection of the background line on the horizontal axis; a is the area of a graph surrounded by a background line and an infrared absorption peak curve; for a given peak, xL、xRWave numbers of the left and right boundary points of the peak region, respectively; y isL、yRRespectively corresponding absorbance; y isiRepresenting the corresponding absorbance when the wavenumber is i.
8. The method for evaluating the aging degree of a composite insulator based on infrared spectroscopy according to any one of claims 1 to 3, wherein:
in step 4, the aging degree of the composite insulator is divided into the following four grades from light to heavy according to the calculation results of the infrared absorption peak areas of Si-CH3 and Si-O-Si:
aging at the I stage: Si-CH3 absorption peak area > 2;
and (2) aging at the II stage: 1< Si-CH3 absorption peak area < 2;
aging in grade III: Si-CH3 absorption peak area <1, and Si-O-Si absorption peak area > 30;
and (3) aging at the IV stage: Si-CH3 absorption peak area <1 and Si-O-Si absorption peak area < 30.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010733165.5A CN111999259A (en) | 2020-07-27 | 2020-07-27 | Composite insulator aging degree evaluation method based on infrared spectrum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010733165.5A CN111999259A (en) | 2020-07-27 | 2020-07-27 | Composite insulator aging degree evaluation method based on infrared spectrum |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111999259A true CN111999259A (en) | 2020-11-27 |
Family
ID=73467944
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010733165.5A Pending CN111999259A (en) | 2020-07-27 | 2020-07-27 | Composite insulator aging degree evaluation method based on infrared spectrum |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111999259A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113030168A (en) * | 2021-03-18 | 2021-06-25 | 国网河北省电力有限公司电力科学研究院 | Silicon rubber material quality evaluation method based on TGA-FTIR |
| CN113777070A (en) * | 2021-09-06 | 2021-12-10 | 江苏神马电力股份有限公司 | Method for evaluating aging degree of silicone rubber through inorganic degree |
| CN113791322A (en) * | 2021-09-07 | 2021-12-14 | 国网山东省电力公司电力科学研究院 | Composite insulator core rod aging degree evaluation method and system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102230893A (en) * | 2011-03-28 | 2011-11-02 | 广西电网公司电力科学研究院 | Quantitative identification method of composite insulator umbrella skirt aging |
| CN103398972A (en) * | 2013-08-07 | 2013-11-20 | 华北电力大学（保定） | Silicone rubber composite insulator aging degree detection method |
| CN104713844A (en) * | 2015-03-30 | 2015-06-17 | 武汉大学 | Method for evaluating composite insulator silicone rubber aging degree based on Fourier infrared spectroscopy |
| CN104764708A (en) * | 2014-12-10 | 2015-07-08 | 广西电网有限责任公司河池供电局 | Evaluation method for ageing state of composite insulator |
-
2020
- 2020-07-27 CN CN202010733165.5A patent/CN111999259A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102230893A (en) * | 2011-03-28 | 2011-11-02 | 广西电网公司电力科学研究院 | Quantitative identification method of composite insulator umbrella skirt aging |
| CN103398972A (en) * | 2013-08-07 | 2013-11-20 | 华北电力大学（保定） | Silicone rubber composite insulator aging degree detection method |
| CN104764708A (en) * | 2014-12-10 | 2015-07-08 | 广西电网有限责任公司河池供电局 | Evaluation method for ageing state of composite insulator |
| CN104713844A (en) * | 2015-03-30 | 2015-06-17 | 武汉大学 | Method for evaluating composite insulator silicone rubber aging degree based on Fourier infrared spectroscopy |
Non-Patent Citations (2)
| Title |
|---|
| 庹先国: "《X射线荧光分析系统技术原理和应用》", 31 July 2017 * |
| 谭宇翔等: "基于傅立叶红外光谱法的复合绝缘子老化程度诊断研究", 《电气自动化》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113030168A (en) * | 2021-03-18 | 2021-06-25 | 国网河北省电力有限公司电力科学研究院 | Silicon rubber material quality evaluation method based on TGA-FTIR |
| CN113777070A (en) * | 2021-09-06 | 2021-12-10 | 江苏神马电力股份有限公司 | Method for evaluating aging degree of silicone rubber through inorganic degree |
| CN113791322A (en) * | 2021-09-07 | 2021-12-14 | 国网山东省电力公司电力科学研究院 | Composite insulator core rod aging degree evaluation method and system |
| CN113791322B (en) * | 2021-09-07 | 2024-03-08 | 国网山东省电力公司电力科学研究院 | Composite insulator core rod aging degree evaluation method and system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111999259A (en) | Composite insulator aging degree evaluation method based on infrared spectrum | |
| CN111855595B (en) | Spectral data calibration method based on black and white calibration plate | |
| CN111965098B (en) | Evaluation method for ageing state of composite insulator operated in tropical environment | |
| Küpper et al. | Attenuated total reflection infrared spectroscopy for micro-domain analysis of polyethylene samples after accelerated ageing within weathering chambers | |
| CN109000597B (en) | A kind of surface roughness measuring method based on laser induced breakdown spectroscopy | |
| CN101105446A (en) | Differential optical absorption spectroscopy air quality detection system | |
| WO2018076430A1 (en) | Method for testing surface hardness of composite insulating material | |
| CN111965140B (en) | Wavelength point recombination method based on characteristic peak | |
| CN109991181B (en) | Adaptive surface absorption spectrum analysis method, system, storage medium and device | |
| CN103760129A (en) | Method of detecting aging degree of anti-pollution flashover coating of room temperature vulcanized silicone rubber | |
| CN106596499A (en) | Real-time Raman spectrum calibration method | |
| CN111965097A (en) | Method for evaluating anti-aging performance of new composite insulator in tropical environment | |
| CN111239073B (en) | Composite insulator aging degree detection method based on hyperspectral technology | |
| CN112666038B (en) | Method for representing moisture absorption process based on near infrared spectrum | |
| CN108195866A (en) | A kind of determination method of composite insulator silicon rubber degree of aging | |
| CN112362609A (en) | Method for identifying oil stain smoke pollution source based on infrared spectrum technology | |
| CN111965131A (en) | Composite insulator aging evaluation method based on infrared spectrum characteristic peak ratio method | |
| CN105784630B (en) | A kind of silicon rubber glue detection method of content based on infrared spectrum analysis | |
| JP5140639B2 (en) | Remaining life diagnosis method, remaining life diagnosis device and program | |
| CN111678886A (en) | TDLAS (tunable diode laser absorption spectroscopy) determination SF (sulfur hexafluoride)6Method for calibrating and verifying humidity in equipment | |
| CN114397266A (en) | Composite insulator aging detection method and device based on terahertz spectrum | |
| CN112432969A (en) | Composite insulator aging degree improvement detection method based on modulation photothermal radiation | |
| CN110987855A (en) | Rapid asphalt aging detection method based on ATR-FTIR | |
| CN103808686A (en) | Method for measuring weight ratio of SBS modifier in SBS modified asphalt | |
| CN110426320A (en) | The judgment method of composite insulator degree of aging |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201127 |