CN117250054A - Electrical equipment insulation state evaluation method based on insulation material pyrolysis product analysis - Google Patents
Electrical equipment insulation state evaluation method based on insulation material pyrolysis product analysis Download PDFInfo
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- 238000000197 pyrolysis Methods 0.000 title claims abstract description 63
- 238000009413 insulation Methods 0.000 title claims abstract description 61
- 238000004458 analytical method Methods 0.000 title claims abstract description 39
- 238000011156 evaluation Methods 0.000 title claims abstract description 19
- 239000012774 insulation material Substances 0.000 title claims description 10
- 238000001514 detection method Methods 0.000 claims abstract description 26
- 230000032683 aging Effects 0.000 claims abstract description 25
- 238000005516 engineering process Methods 0.000 claims abstract description 19
- 239000011810 insulating material Substances 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 17
- 239000000126 substance Substances 0.000 claims abstract description 12
- 238000002290 gas chromatography-mass spectrometry Methods 0.000 claims abstract description 10
- 230000003068 static effect Effects 0.000 claims abstract description 10
- 238000012544 monitoring process Methods 0.000 claims abstract description 4
- 239000007789 gas Substances 0.000 claims description 90
- 239000013307 optical fiber Substances 0.000 claims description 10
- 230000035945 sensitivity Effects 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 9
- 239000004698 Polyethylene Substances 0.000 claims description 5
- 229920003020 cross-linked polyethylene Polymers 0.000 claims description 5
- 239000004703 cross-linked polyethylene Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- -1 polyethylene Polymers 0.000 claims description 5
- 229920000573 polyethylene Polymers 0.000 claims description 5
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 5
- 239000004800 polyvinyl chloride Substances 0.000 claims description 5
- 238000005070 sampling Methods 0.000 claims description 5
- 150000001875 compounds Chemical class 0.000 claims description 4
- 239000004593 Epoxy Substances 0.000 claims description 3
- 230000009471 action Effects 0.000 claims description 3
- 230000004913 activation Effects 0.000 claims description 3
- 239000012159 carrier gas Substances 0.000 claims description 3
- 230000015556 catabolic process Effects 0.000 claims description 3
- 238000006731 degradation reaction Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 231100000419 toxicity Toxicity 0.000 claims description 3
- 230000001988 toxicity Effects 0.000 claims description 3
- 238000005422 blasting Methods 0.000 claims 1
- 239000000523 sample Substances 0.000 description 14
- 239000003822 epoxy resin Substances 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000004868 gas analysis Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000004949 mass spectrometry Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 231100000563 toxic property Toxicity 0.000 description 1
- 238000012549 training Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2226—Sampling from a closed space, e.g. food package, head space
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/04—Preparation or injection of sample to be analysed
- G01N30/06—Preparation
- G01N30/12—Preparation by evaporation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/62—Detectors specially adapted therefor
- G01N30/72—Mass spectrometers
- G01N30/7206—Mass spectrometers interfaced to gas chromatograph
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/86—Signal analysis
- G01N30/8675—Evaluation, i.e. decoding of the signal into analytical information
- G01N30/8679—Target compound analysis, i.e. whereby a limited number of peaks is analysed
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/20—Preparation of articles or specimens to facilitate testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N2001/2244—Exhaled gas, e.g. alcohol detecting
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/04—Preparation or injection of sample to be analysed
- G01N30/06—Preparation
- G01N30/12—Preparation by evaporation
- G01N2030/125—Preparation by evaporation pyrolising
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
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Abstract
The invention discloses an electrical equipment insulation state evaluation method and device based on pyrolysis product analysis, wherein the method comprises the following steps: collecting a sample of the insulating material of the electrical equipment by a static headspace technology; pyrolyzing a sample by using a gas chromatography-mass spectrometry technology to obtain pyrolysis gas; selecting index gas from pyrolysis gas; establishing an analysis model based on the concentration of the index gas and the aging characteristic of the insulation part of the electrical equipment; and (3) according to the corresponding relation between the characteristics of the pyrolysis gas and the aging process of the insulating material, the insulation state evaluation detection is realized. Adopting a static headspace technology to treat an insulating material of electrical equipment, and adopting a gas chromatography-mass spectrometry combined technology to analyze pyrolysis products; carrying out physical and chemical property analysis on the pyrolysis gas, and preferably selecting index gas; and establishing an analysis model based on the index gas concentration and the aging characteristic of the insulation part of the electrical equipment, monitoring the insulation characteristic of the insulation part of the electrical equipment in real time based on the model, and early warning the hidden danger of insulation.
Description
Technical Field
The invention relates to the technical field of electrical equipment insulation state evaluation, in particular to an electrical equipment insulation state evaluation method and device based on pyrolysis product analysis.
Background
The insulation state detection of the electrical equipment is the basis for the economic and safe operation assessment of the electrical equipment, and is one of the leading research directions of integrating the multidisciplinary knowledge of traditional electrical equipment, sensor technology, automatic control, signal processing and the like.
At present, the research means about the insulation state detection of electrical equipment is mainly partial discharge detection. However, there is a limitation in the detection of partial discharge, for example, the chemical detection method detects the partial discharge state by detecting the components and the concentration of the chemical substances decomposed from the insulator, a unified judgment standard is required in practical application, a manual sampling method is adopted, the detection result is interfered, and the components to be detected are mostly in trace level, if the collection process cannot be completed under ideal conditions, the accurate analysis result cannot be obtained.
Disclosure of Invention
In view of the above, the embodiment of the invention provides a method and a device for evaluating the insulation state of electrical equipment based on analysis of pyrolysis products, so as to solve the problem that the application of a chemical detection method for detecting partial discharge in the prior art is difficult.
The embodiment of the invention provides an electrical equipment insulation state assessment method based on pyrolysis product analysis, which comprises the following steps:
collecting a sample of the insulating material of the electrical equipment by a static headspace technology;
pyrolyzing a sample by using a gas chromatography-mass spectrometry technology to obtain pyrolysis gas;
selecting index gas from pyrolysis gas;
establishing an analysis model based on the concentration of the index gas and the aging characteristic of the insulation part of the electrical equipment;
and (3) according to the corresponding relation between the characteristics of the pyrolysis gas and the aging process of the insulating material, the insulation state evaluation detection is realized.
Optionally, collecting a sample of the electrical device insulation material by a static headspace technique, comprising:
setting the heating rate and heating time of the sample bottle;
after gas-solid equilibrium is reached in the sample bottle, sampling is carried out on the gas compound by using sample introduction under the action of carrier gas, and quantitative conveying is carried to a chromatograph-mass spectrometer.
Optionally, selecting an indicator gas from the pyrolysis gas, comprising:
the components in the pyrolysis gas are selected according to the criteria of uniqueness, sensitivity and ease of detection.
Optionally, the uniqueness criteria include: the pyrolysis gas component is a non-air component and is precipitated in a preset temperature interval.
Optionally, the sensitivity criteria include: the gas chromatographic sensitivity of the pyrolysis gas composition is within a preset range.
Optionally, the ease of detection criteria include: the explosion property and toxicity of the pyrolysis gas components are monitored by a physical and chemical sensor.
Optionally, the electrical device insulating material comprises: at least one of epoxy, polyethylene, crosslinked polyethylene, and polyvinyl chloride.
Optionally, the insulation state evaluation detection is implemented according to the correspondence between the characteristics of the pyrolysis gas and the aging process of the insulation material, including:
and obtaining the corresponding relation between the characteristics of the pyrolysis gas and the aging process of the insulating material through a support vector regression algorithm.
The model of the index gas concentration and the aging characteristic of the insulation part of the electrical equipment is as follows:
wherein G is the service life of the insulating part, S i For the gas fixed parameters, i represents different gas varieties, k and h are Boltzmann constant and Planck constant, B i =Δw/k is the heat resistance coefficient of the material, Δw is the thermal degradation activation energy, T is time, a is a constant, q 1 For real-time gas concentration value, q i For the reference concentration of gas, q 0 Is the initial gas concentration value.
The embodiment of the invention also provides an electrical equipment insulation state evaluation device based on the analysis of the pyrolysis product of the insulating material, which comprises the following steps of:
an electrochemical sensor or an optical fiber sensor installed in the operating electrical equipment; the electrochemical sensor or the optical fiber sensor monitors the concentration of the index gas of the electrical equipment in real time;
wherein the electrochemical sensor or the optical fiber sensor is configured to have an analytical model established based on the index gas concentration and the aging characteristics of the electrical equipment insulation.
The embodiment of the invention has the beneficial effects that:
according to the embodiment of the invention, a static headspace technology is adopted to treat the insulating material of the electrical equipment, and a gas chromatography-mass spectrometry combined technology is adopted to analyze pyrolysis products; carrying out physical and chemical property analysis on the pyrolysis gas, and preferably selecting index gas; establishing an analysis model based on the concentration of the index gas and the aging characteristic of the insulation part of the electrical equipment; an electrochemical or optical sensor is adopted to conduct an index gas detection algorithm model on the on-line running electric equipment, insulation characteristics of an insulating part of the electric equipment are monitored in real time based on the model, insulation hidden danger is warned, and the problem that a chemical detection method in the prior art is difficult to apply is solved.
Drawings
The features and advantages of the present invention will be more clearly understood by reference to the accompanying drawings, which are illustrative and should not be construed as limiting the invention in any way, in which:
fig. 1 shows a flowchart of an electrical equipment insulation state evaluation method based on pyrolysis product analysis in an embodiment of the invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.
The embodiment of the invention provides an electrical equipment insulation state assessment method based on pyrolysis product analysis, which is shown in fig. 1 and comprises the following steps:
step S10, collecting samples of the electrical equipment insulating material through a static headspace technology.
In the embodiment, the possibility of matrix interference components in the detection system can be effectively reduced through the static headspace technology sampling, so that the influence of matrix components on analysis results and pollution to monitoring instruments are eliminated, and the heating treatment of the detected sample materials is efficiently completed.
And step S20, pyrolyzing the sample by using a gas chromatography-mass spectrometry technology to obtain pyrolysis gas.
In this example, the rate of heating up and the heating time for the sample bottles were set. After gas-solid equilibrium is reached in the sample bottle, sampling is carried out on the gas compound by using sample introduction under the action of carrier gas, and quantitative conveying is carried to a chromatograph-mass spectrometer.
In a specific embodiment, the insulating sample products such as epoxy resin, polyethylene, crosslinked polyethylene, polyvinyl chloride and the like at different heating temperatures are analyzed by adopting a headspace gas chromatography-mass spectrometry technique.
Step S30, selecting index gas from pyrolysis gas.
In this example, the gas compounds in the results list of the pyrolysis gas analysis are mostly non-air components, so that the gas components released by heating the sample material need to be optimized according to the standards of uniqueness, sensitivity and easiness of detection.
And step S40, establishing an analysis model based on the index gas concentration and the aging characteristic of the electrical equipment insulator.
In the embodiment, the index gas corresponding to each temperature interval is obtained through analysis, so that a theoretical basis is provided for a monitoring technology of the concealed electric circuit based on the index gas.
The model of the index gas concentration and the aging characteristic of the insulation part of the electrical equipment is as follows:
wherein G is the service life of the insulating part, S i For the gas fixed parameters, i represents different gas varieties, k and h are Boltzmann constant and Planck constant, B i =Δw/k is the heat resistance coefficient of the material, Δw is the thermal degradation activation energy, T is time, a is a constant, q 1 For real-time gas concentration value, q i For the reference concentration of gas, q 0 Is the initial gas concentration value.
And S50, evaluating and detecting the insulation state according to the corresponding relation between the characteristics of the pyrolysis gas and the aging process of the insulation material.
In the present embodiment, insulation state evaluation detection is performed on the electrical equipment insulation material being operated according to the analysis model obtained in step S40.
According to the embodiment of the invention, a static headspace technology is adopted to treat the insulating material of the electrical equipment, and a gas chromatography-mass spectrometry combined technology is adopted to analyze pyrolysis products; carrying out physical and chemical property analysis on the pyrolysis gas, and preferably selecting index gas; establishing an analysis model based on the concentration of the index gas and the aging characteristic of the insulation part of the electrical equipment; an electrochemical or optical sensor is adopted to conduct an index gas detection algorithm model on the on-line running electric equipment, insulation characteristics of an insulating part of the electric equipment are monitored in real time based on the model, insulation hidden danger is warned, and the problem that a chemical detection method in the prior art is difficult to apply is solved.
As an alternative embodiment, the uniqueness criteria include: the pyrolysis gas component is a non-air component and is precipitated in a preset temperature interval.
In this embodiment, each index gas has a corresponding precipitation temperature interval, and the uniqueness of the index gas is determined according to the corresponding relationship of the precipitation temperature intervals.
As an alternative embodiment, the sensitivity criteria include: the gas chromatographic sensitivity of the pyrolysis gas composition is within a preset range.
In this embodiment, the sensitivity of the index gas is high, so that the index gas can be found in time. The preset range is set according to the chromatographic mass spectrometry device.
As an alternative embodiment, the ease of detection criteria include: the explosion property and toxicity of the pyrolysis gas components are monitored by a physical and chemical sensor.
In this embodiment, based on the explosive property and toxic property of each index gas, a physical and chemical sensor corresponding to the index gas can monitor the index gas.
As an alternative embodiment, the electrical device insulating material includes: at least one of epoxy, polyethylene, crosslinked polyethylene, and polyvinyl chloride.
As an optional embodiment, the insulation state evaluation detection is implemented according to the correspondence between the characteristics of the pyrolysis gas and the aging process of the insulation material, and includes:
and obtaining the corresponding relation between the characteristics of the pyrolysis gas and the aging process of the insulating material through a support vector regression algorithm.
In the embodiment, starting from the analysis of the pyrolysis performance of the hidden danger state of the insulating materials such as epoxy resin, polyethylene, crosslinked polyethylene, polyvinyl chloride and the like, the type and the concentration of the heated separated gas of the materials are analyzed by adopting a headspace sampler combined gas chromatography mass spectrometry technology. And using the test sample as training data for analysis modeling, and mining the internal relation between the pyrolysis gas characteristics and the insulation aging process. And revealing the corresponding relation between the extracted characteristics and insulation aging through algorithms such as support vector regression and the like, and establishing an electrical equipment insulation part insulation characteristic prediction and algorithm model based on pyrolysis product analysis.
The embodiment of the invention also provides an electrical equipment insulation state evaluation device based on analysis of pyrolysis products of insulating materials, and the electrical equipment insulation state evaluation method based on analysis of pyrolysis products in the embodiment is applied and comprises the following steps:
an electrochemical sensor or an optical fiber sensor installed in the operating electrical equipment; the electrochemical sensor or the optical fiber sensor monitors the concentration of the index gas of the electrical equipment in real time;
wherein the electrochemical sensor or the optical fiber sensor is configured to have an analytical model established based on the index gas concentration and the aging characteristics of the electrical equipment insulation.
In this embodiment, the gas components of the insulation state index of the electrical equipment are analyzed by using the gas chromatography-mass spectrometry technology, electrochemical or optical fiber sensors sensitive to the gas are installed in the running electrical equipment, the concentration of the index gas is monitored in real time to judge the health condition of the insulation part of the electrical equipment, the insulation characteristic of the insulation part of the electrical equipment is monitored in real time based on the index gas detection algorithm model, and the potential insulation hazard is warned.
Although embodiments of the present invention have been described in connection with the accompanying drawings, various modifications and variations may be made by those skilled in the art without departing from the spirit and scope of the invention, and such modifications and variations are within the scope of the invention as defined by the appended claims.
Claims (10)
1. A method for evaluating insulation status of an electrical device based on analysis of pyrolysis products, comprising:
collecting a sample of the insulating material of the electrical equipment by a static headspace technology;
pyrolyzing the sample by using a gas chromatography mass spectrometry technology to obtain pyrolysis gas;
selecting an index gas from the pyrolysis gas;
establishing an analysis model based on the index gas concentration and the aging characteristic of the insulation part of the electrical equipment;
and according to the corresponding relation between the characteristics of the pyrolysis gas and the aging process of the insulating material, the insulation state evaluation and detection are realized.
2. The method for evaluating the insulation state of an electrical device based on analysis of pyrolysis products according to claim 1, wherein collecting a sample of the insulation material of the electrical device by a static headspace technique comprises:
setting the heating rate and heating time of the sample bottle;
after gas-solid equilibrium is reached in the sample bottle, sampling is carried out on the gas compound by using sample introduction under the action of carrier gas, and quantitative conveying is carried out to a chromatograph-mass spectrometer.
3. The method for evaluating the insulation state of an electrical device based on analysis of a pyrolysis product according to claim 1, wherein selecting an index gas from the pyrolysis gas comprises:
the components in the pyrolysis gas are selected according to criteria of uniqueness, sensitivity and ease of detection.
4. The method for evaluating the insulation state of an electrical device based on analysis of a pyrolysis product according to claim 3, wherein the uniqueness criteria comprises: the pyrolysis gas component is a non-air component and is separated out in a preset temperature interval.
5. The method for evaluating the insulation state of an electrical device based on analysis of a pyrolysis product according to claim 3, wherein the sensitivity criteria comprises: the gas chromatographic sensitivity of the pyrolysis gas component is within a preset range.
6. The method for evaluating the insulation state of an electrical device based on analysis of a pyrolysis product according to claim 3, wherein the criterion for easiness of detection comprises: and monitoring the blasting property and the toxicity of the pyrolysis gas component through a physical and chemical sensor.
7. The method for evaluating the insulation state of an electrical device based on analysis of a pyrolysis product according to claim 1, wherein the electrical device insulation material comprises: at least one of epoxy, polyethylene, crosslinked polyethylene, and polyvinyl chloride.
8. The insulation state evaluation method for an electrical device based on analysis of pyrolysis products according to claim 1, wherein the insulation state evaluation detection is realized according to the correspondence relationship between the characteristics of the pyrolysis gas and the aging process of the insulation material, comprising:
and obtaining the corresponding relation between the characteristics of the pyrolysis gas and the aging process of the insulating material through a support vector regression algorithm.
9. The method for evaluating the insulation state of an electrical device based on analysis of a pyrolysis product according to claim 1, wherein the model of the index gas concentration and the aging characteristic of the insulation member of the electrical device is:
wherein G is the service life of the insulating part, S i For the gas fixed parameters, i represents different gas varieties, k and h are Boltzmann constant and Planck constant, B i =Δw/k is the heat resistance coefficient of the material, Δw is the thermal degradation activation energy, T is time, a is a constant, q 1 For real-time gas concentration value, q i For the reference concentration of gas, q 0 Is concentrated to the initial gasAnd (5) a degree value.
10. An electrical equipment insulation state evaluation device based on analysis of pyrolysis products of insulating materials, applying the electrical equipment insulation state evaluation method based on analysis of pyrolysis products according to any one of claims 1 to 9, characterized by comprising:
an electrochemical sensor or an optical fiber sensor installed in the operating electrical equipment; the electrochemical sensor or the optical fiber sensor monitors the concentration of the index gas of the electrical equipment in real time;
wherein the electrochemical sensor or the optical fiber sensor is configured to have an analytical model established based on the index gas concentration and an electrical equipment insulation aging characteristic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310288781.8A CN117250054A (en) | 2023-03-23 | 2023-03-23 | Electrical equipment insulation state evaluation method based on insulation material pyrolysis product analysis |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310288781.8A CN117250054A (en) | 2023-03-23 | 2023-03-23 | Electrical equipment insulation state evaluation method based on insulation material pyrolysis product analysis |
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| CN117250054A true CN117250054A (en) | 2023-12-19 |
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| CN202310288781.8A Pending CN117250054A (en) | 2023-03-23 | 2023-03-23 | Electrical equipment insulation state evaluation method based on insulation material pyrolysis product analysis |
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