CN110553986A - Multifunctional comprehensive analyzer for each component of decomposition product in SF6 gas - Google Patents
Multifunctional comprehensive analyzer for each component of decomposition product in SF6 gas Download PDFInfo
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- 238000000354 decomposition reaction Methods 0.000 title claims abstract description 49
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 37
- 238000001228 spectrum Methods 0.000 claims abstract description 33
- 238000001914 filtration Methods 0.000 claims abstract description 15
- 238000001514 detection method Methods 0.000 claims description 67
- 238000010521 absorption reaction Methods 0.000 claims description 30
- 238000004458 analytical method Methods 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 13
- 230000003287 optical effect Effects 0.000 claims description 13
- 238000009529 body temperature measurement Methods 0.000 claims description 11
- 239000004065 semiconductor Substances 0.000 claims description 11
- 239000013078 crystal Substances 0.000 claims description 10
- 239000000126 substance Substances 0.000 claims description 8
- 239000012535 impurity Substances 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 25
- 238000000862 absorption spectrum Methods 0.000 abstract description 12
- 239000007789 gas Substances 0.000 description 102
- 229910018503 SF6 Inorganic materials 0.000 description 39
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 39
- 238000005057 refrigeration Methods 0.000 description 14
- TXEYQDLBPFQVAA-UHFFFAOYSA-N tetrafluoromethane Chemical compound FC(F)(F)F TXEYQDLBPFQVAA-UHFFFAOYSA-N 0.000 description 14
- 230000003595 spectral effect Effects 0.000 description 9
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 6
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 6
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 6
- 238000009413 insulation Methods 0.000 description 6
- 239000007787 solid Substances 0.000 description 6
- 239000000203 mixture Substances 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 238000002329 infrared spectrum Methods 0.000 description 4
- KLZUFWVZNOTSEM-UHFFFAOYSA-K Aluminium flouride Chemical compound F[Al](F)F KLZUFWVZNOTSEM-UHFFFAOYSA-K 0.000 description 3
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 239000004020 conductor Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- 238000002211 ultraviolet spectrum Methods 0.000 description 3
- 229910021594 Copper(II) fluoride Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- GWFAVIIMQDUCRA-UHFFFAOYSA-L copper(ii) fluoride Chemical compound [F-].[F-].[Cu+2] GWFAVIIMQDUCRA-UHFFFAOYSA-L 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 229960000909 sulfur hexafluoride Drugs 0.000 description 2
- IRPGOXJVTQTAAN-UHFFFAOYSA-N 2,2,3,3,3-pentafluoropropanal Chemical compound FC(F)(F)C(F)(F)C=O IRPGOXJVTQTAAN-UHFFFAOYSA-N 0.000 description 1
- 229910016569 AlF 3 Inorganic materials 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910016509 CuF 2 Inorganic materials 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 238000004847 absorption spectroscopy Methods 0.000 description 1
- -1 and the like Substances 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000004587 chromatography analysis Methods 0.000 description 1
- 238000004737 colorimetric analysis Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000000835 electrochemical detection Methods 0.000 description 1
- 238000002848 electrochemical method Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 238000000752 ionisation method Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 230000009965 odorless effect Effects 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Classifications
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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
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
-
- 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
- G01N21/314—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry with comparison of measurements at specific and non-specific wavelengths
- G01N21/3151—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry with comparison of measurements at specific and non-specific wavelengths using two sources of radiation of different wavelengths
Abstract
the invention discloses a comprehensive analyzer for each component of a decomposition product in multifunctional SF6 gas, which comprises an air inlet and filtering component, a gas shunt metering component, a spectrum component, an electrochemical component, a cold mirror micro-water component, a data processing component and a total data output component, wherein gas to be detected is connected with the air inlet and filtering component through an air inlet pipeline, the air inlet and filtering component is connected with the gas shunt metering component, the gas shunt metering component is respectively connected with the spectrum component and the cold mirror micro-water component, the spectrum component is connected with the electrochemical component, the electrochemical component and the cold mirror micro-water component are electrically connected with the data processing component, and the data processing component is electrically connected with the total data output component. The invention adopts the infrared absorption spectrum technology and the ultraviolet absorption spectrum technology, and combines the electrochemical sensor technology to detect the trace content of the CF4 gas component and the content of the other decomposition product components in the SF6 gas, thereby realizing the purpose of accurately detecting the SF6 gas decomposition product components.
Description
Technical Field
The invention relates to the technical field of SF6 electrical decomposition equipment, in particular to a multifunctional comprehensive analyzer for each component of a decomposition product in SF6 gas.
Background
The existing detection methods for the decomposition products of SF6 electrical equipment include electrochemical method, chemical colorimetric method, chromatography, ionization method, dynamic ion method and infrared method. The above detection method can detect the content of other components except for the CF4, but the CF4 content plays an important role in judging SF6 equipment, so the above method cannot meet the current detection requirement.
in recent years, the electrochemical sensing technology is greatly developed, the sensitivity, the stability and the service life of the electrochemical sensing technology are greatly improved, the detection level of the SF6 gas decomposition product is improved, the minimum detection amount is greatly reduced, the gas consumption is greatly reduced, the detection technology is the most widely used detection technology at present, and most SF6 decomposition product testers adopt the electrochemical technical scheme to realize detection. However, this technique uses an electrochemical sensor, and CF4 in the decomposition product is chemically stable and contained in an extremely small amount, so that this component cannot be detected by the prior art.
The detection analysis of the CF4 component in the prior art can achieve the detection purpose by adopting an infrared spectrum absorption method, but the prior CF4 detection equipment has the defects that other decomposed components cannot be detected, and simultaneously, the problem that the infrared absorption spectrum curve of CF4 is overlapped with the absorption peaks of the infrared spectrum curves of other components exists, so that the detection is deviated or even cannot be detected.
the prior art temporarily does not integrate a plurality of analysis and detection technologies into a set of system, and has no analysis technology and equipment for detecting and analyzing various components of the decomposition product of SF6, or has no equipment for performing enhanced analysis on the content of SF6 gas components by using ultraviolet absorption spectroscopy.
When a fault exists in the interior of SF6 electrical equipment, SF6 gas and solid insulating materials and conductors in the fault area are cracked under the action of heat and electricity, and various compounds such as sulfide, fluoride and carbide are generated. After being verified by a large number of tests and fault examples, the decomposition products of the SF6 electrical equipment mainly comprise: SO2, H2S, CO2, CF4, AlF3, CuF2 and the like. These decomposition products will also slowly dissolve and diffuse into SF6 gas, resulting in poor performance and poor insulation performance of SF6 gas, and finally in insulation failure, which may cause serious accidents. The CF4 component content in the decomposition product of SF6 is very little, and the chemical property is stable, so that the decomposition product cannot be detected by a chemical method, and the component content plays an important role in analyzing and judging equipment faults.
In summary, the prior art has the following defects:
(1) Poor stability and long stabilization time. In the prior art, pure SF6 is calibrated by pure SF6 gas after being started for 20 minutes each time, and the detected gas can be introduced for detection after the gas is qualified.
(2) The sensitivity is low. Due to poor stability and large noise, the minimum detection amount is more than 1-15 muL/L.
(3) The detection gas consumption is large. 1000-2000 ml is used for each detection, which is not beneficial to environmental protection.
(4) The instrument is heavy and inconvenient to use and carry.
disclosure of Invention
The invention aims to provide a multifunctional comprehensive analyzer for each component of a decomposition product in SF6 gas, which adopts an infrared absorption spectrum technology and an ultraviolet absorption spectrum technology, combines an electrochemical sensor technology to detect the content of trace CF4 gas components and the content of other decomposition product components in SF6 gas, and simultaneously utilizes a high-low two-frequency-band spectrum technology to perform auxiliary content analysis to realize the purpose of accurately detecting the components of the SF6 gas decomposition product so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
A comprehensive analyzer for each component of a decomposition product in multifunctional SF6 gas comprises an air inlet and filtering component, a gas shunt metering component, a spectrum component, an electrochemical component, a cold mirror micro-water component, a data processing component and a total data output component, wherein a gas to be detected is connected with the air inlet and filtering component through an air inlet pipeline, the air inlet and filtering component is connected with the gas shunt metering component, the gas shunt metering component is respectively connected with the spectrum component and the cold mirror micro-water component, the spectrum component is connected with the electrochemical component, the electrochemical component and the cold mirror micro-water component are electrically connected with the data processing component together, the data processing component is electrically connected with the total data output component, wherein,
The air inlet and filter assembly filters possible large-particle impurities so as to prevent the impurities from damaging a subsequent air path and a detection assembly, and the air inlet and filter assembly is physically filtered, so that the air inlet and filter assembly has no influence on each component in the air and does not influence component analysis data;
The gas shunt metering component gas path is divided into two paths, one path is a component analysis gas path, the other path is a moisture detection gas path, and each gas path independently meters gas quantity;
The sample gas is irradiated by dual-band light in the spectrum assembly, and CF is detected and the content of the other components is pre-judged;
The sample gas after the spectrum assembly enters the electrochemical assembly, and if the sample gas contains a certain decomposition product component, the corresponding electrochemical sensor outputs a corresponding signal;
the independent path of sample gas passes through the cold mirror micro-water component, and is continuously cooled under the control of an instrument until the optical sensor detects that the mirror surface is dewed, then the current temperature is dew point data, and water content data is obtained according to different dew points and corresponding different water contents;
And the data processing component and the total data output component analyze, process and output the data of each sensor and component.
Furthermore, the gas shunt metering assembly comprises a component metering channel and a micro-water metering channel, the component metering channel is connected with the sample gas in the spectrum assembly, and the micro-water metering channel is connected with the cold mirror micro-water assembly.
furthermore, the spectrum subassembly includes light source subassembly, beam splitting subassembly, absorption subassembly and detection subassembly A, and infrared light source and ultraviolet light source get into the beam splitting subassembly of side through the processing of light source subassembly, and infrared light beam and ultraviolet light beam are projected to the absorption subassembly through the reflection of beam splitting subassembly, and the below of absorption subassembly sets up detection subassembly A.
Further, the light source component comprises a reflector A, a slit grating A, a diffraction grating and a slit grating B;
The light splitting component comprises a reflecting mirror B, a half reflecting mirror, a reflecting mirror C and a reflecting mirror D;
an absorption pool is arranged in the absorption assembly;
The detection component A comprises a crystal filter A, a crystal filter B, a photoelectric detection A and a photoelectric detection B.
Furthermore, the electrochemical assembly comprises a gas branching and metering assembly, a gas channel, a sensor array and a data output assembly, and the sample gas channel sequentially passes through the gas branching and metering assembly, the gas channel and the sensor array and finally passes through the data output assembly.
furthermore, the sensor array is preset with seeds at the present stage, is installed with seeds at the present stage, and is reserved at the positions of the three sensors.
furthermore, the cold mirror micro-water assembly consists of a cold mirror assembly and a detection assembly.
Furthermore, the cold mirror assembly is composed of an assembly base, a semiconductor refrigeration piece, a heat conduction temperature measurement assembly and a refrigeration mirror surface, wherein the refrigeration mirror surface is pasted on the heat conduction temperature measurement assembly, the heat conduction temperature measurement assembly is pasted on the semiconductor refrigeration piece, and the semiconductor refrigeration piece is arranged on the assembly base.
Furthermore, the detection assembly B is composed of an irradiation light source, a light-equalizing assembly and an optical dew detection assembly, the light-equalizing assembly and the optical dew detection assembly are adhered together, and the irradiation light source is arranged above the light-equalizing assembly.
Compared with the prior art, the invention has the beneficial effects that:
1. The comprehensive analyzer for each component of the decomposition product in the multifunctional SF6 gas combines the spectral absorption technology and the electrochemical sensor technology, and realizes the simultaneous detection of CF4 and the decomposition product component.
2. the invention relates to a multifunctional comprehensive analyzer for each component of a decomposition product in SF6 gas, which adds an ultraviolet spectrum absorption technology in an SF6 gas decomposition product detection technology, searches for a symmetrical spectrum which is a curve of the same component by utilizing different spectral curves of uniform substances in an unvoiced frequency band spectrum, and can accurately judge and analyze the content of each component.
3. The multifunctional comprehensive analyzer for the components of the decomposition product in the SF6 gas integrates a low-temperature refrigeration optical system, and can simultaneously detect the water content in the same test.
Drawings
FIG. 1 is a schematic view of the overall structure of the analyzer of the present invention;
FIG. 2 is a schematic view of a spectral absorption assembly according to the present invention;
FIG. 3 is a schematic view of an electrochemical assembly according to the present invention;
FIG. 4 is a schematic view of a micro-water detecting assembly according to the present invention.
In the figure: 1. an air intake and filtration assembly; 2. a gas shunt metering assembly; 3. a spectral component; 31. a light source assembly; 311. a reflector A; 312. a slit grating A; 313. a diffraction grating; 314. a slit grating B; 32. a light splitting component; 321. a mirror B; 322. a half mirror; 323. a mirror C; 324. a mirror D; 33. an absorbent assembly; 331. an absorption tank; 34. a detection component A; 341. a crystal filter A; 342. a crystal filter B; 343. photoelectric detection A; 344. photoelectric detection B; 4. an electrochemical assembly; 41. a gas shunt and metering assembly; 42. a gas channel; 43. an array of sensors; 44. a data output component; 5. a cold mirror micro-water assembly; 51. a cold mirror assembly; 511. an assembly base; 512. a semiconductor refrigeration sheet; 513. a heat conduction temperature measurement component; 514. a mirror surface is refrigerated; 52. a detection component B; 521. an illumination source; 522. a light equalizing component; 523. an optical dew detection assembly; 6. a data processing component; 7. a total data output component.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, a comprehensive analyzer of each component of decomposition product in multi-functional SF6 gas, including admitting air and filter assembly 1, gaseous branch road measurement subassembly 2, spectrum subassembly 3, electrochemical component 4, cold mirror little water subassembly 5, data processing subassembly 6 and total data output subassembly 7, the gas that awaits measuring connects admits air and filter assembly 1 through the admission pipeline, admit air and filter assembly 1 connects gaseous branch road measurement subassembly 2, gaseous branch road measurement subassembly 2 connects spectrum subassembly 3 and cold mirror little water subassembly 5 respectively, spectrum subassembly 3 connects electrochemical component 4, electrochemical component 4 and cold mirror little water subassembly 5 are connected the data processing subassembly 6 together electrically, data processing subassembly 6 is connected the total data output subassembly 7 electrically, wherein:
the gas to be measured is connected into the gas inlet and filtering component 1 through a special pipeline and a joint, and the gas inlet and filtering component is used for filtering possible large-particle impurities so as to prevent the impurities from damaging a subsequent gas circuit and a detection component, and the filtering component is used for physical filtering and has no influence on each component in the gas and component analysis data.
The gas is divided into two routes along the branch metering assembly 2 gas circuit, and the gas is divided along the branch metering assembly 2 and is included composition metering channel and little water metering channel, because of this analytical equipment detects the composition and the vapor content of sample gas simultaneously, consequently divide into two routes with the gas circuit, be the composition analysis gas circuit all the way, be moisture detection gas circuit all the way, every gas circuit measures the tolerance alone, composition metering channel is connected at spectral component 3 with sample gas, little water metering channel and the little water subassembly 5 of cold mirror are connected.
The sample gas is irradiated by dual-band light in the spectrum component 3, and the CF4 is detected and the content of the other components is predicted. The process is not essential to the gas.
The sample gas after the spectrum component 3 enters the electrochemical component 4, and if the sample gas contains a certain decomposition product component, the corresponding electrochemical sensor outputs a corresponding signal.
the independent sample gas of the same kind is through the little water component 5 of cold mirror, continues the cooling under instrument control, until detecting the mirror surface dewfall by optical sensor, then the temperature at that time is dew point data, corresponds different water content according to different dew points, reachs water content data.
The data processing component 6 and the total data output component 7 analyze and process the data of each sensor and component and output the data.
Referring to fig. 2, the spectrum module 3 includes a light source module 31, a light splitting module 32, an absorption module 33, and a detection module a34, the infrared light source and the ultraviolet light source enter the light splitting module 32 on the side surface through the processing of the light source module 31, the infrared light beam and the ultraviolet light beam are projected to the absorption module 33 through the reflection of the light splitting module 32, and the detection module a34 is disposed below the absorption module 33. The light source assembly 31 includes a mirror a311, a slit grating a312, a diffraction grating 313, and a slit grating B314. The light splitting assembly 32 includes a mirror B321, a half mirror 322, a mirror C323, and a mirror D324. The absorption unit 33 houses an absorption cell 331. Detection assembly a34 includes crystal filter a341, crystal filter B342, photodetector a343, and photodetector B344.
Firstly, mixing an infrared light source (namely, A in FIG. 2) and an ultraviolet light source (namely, B in FIG. 2) through a reflector A311, and processing through a slit grating A312, a diffraction grating 313 and a slit grating B314 to obtain an irradiation light source 521 in a specific frequency band; then, the light is reflected to the half mirror 322 through the mirror B321, the infrared light source is directly reflected to the mirror C323, the ultraviolet light source is refracted through the half mirror 322 and passes through the half mirror 322 to irradiate the mirror D324, the mirror D324 projects an infrared light beam (i.e., C in fig. 2), the mirror D324 projects an ultraviolet light beam (i.e., D in fig. 2), and the light splitting is completed; then, the light beams of the two frequency bands irradiate the sample gas in the absorption cell 331, the absorption spectra are respectively detected and output by the photoelectric detection A343 and the photoelectric detection B344 through the crystal filter A341 and the crystal filter B342 according to different absorption curves of different components to the spectra, and the data of the component contents of the sample gas is obtained by comparing the characteristic spectrum data of the spectral database.
Because the components and properties of the sample gas are not changed in the detection process of the spectrum component 3, the components of the sample gas are detected by the spectrum component 3, and enter the electrochemical component 4 for residual component content detection after pre-analysis.
referring to fig. 3, the electrochemical assembly 4 includes a gas branching and metering assembly 41, a gas channel 42, a sensor array 43, and a data output assembly 44, and the sample gas channel passes through the gas branching and metering assembly 41, the gas channel 42, the sensor array 43, and finally the data output assembly 44 in sequence. The sensor array 43 is preset with 10 types at the present stage, 7 types at the present stage, and three sensor positions are reserved. During the detection process of the electrochemical component 4, the corresponding gas decomposition component is absorbed and converted by the corresponding electrochemical sensor, so that the gas amount thereof changes. In this assembly, the present invention divides the gas into multiple paths by passing the sample gas (M in fig. 3 is a sample gas channel) through the gas branching and metering assembly 41, each path of gas corresponds to one sensor, and if there is a component corresponding to a sensor in the gas, the corresponding sensor outputs data. After the gas is branched, the gas enters the sensor array 43 through the independent gas channel 42, the sensor array 43 is preset with 10 types at the present stage, and is installed with 7 types at the present stage, and three sensor positions are reserved (3 at the lowest end of the sensor array 43 in fig. 3) for the future installation of a new component detection sensor. The data of the sensor array 43 is summarized by the computer to the data output component 44 for processing and outputting.
Referring to fig. 4, the cold mirror micro-water assembly 5 is composed of a cold mirror assembly 51 and a detection assembly B52. The cold mirror assembly 51 is by the subassembly base 511, semiconductor refrigeration piece 512, heat conduction temperature measurement subassembly 513 and refrigeration mirror surface 514 are constituteed, refrigeration mirror surface 514 is a high accuracy mirror surface original paper, refrigeration mirror surface 514 pastes on heat conduction temperature measurement subassembly 513, if the mirror surface has the dewfall, can be detected by optical detection sensor, heat conduction temperature measurement subassembly 513 pastes on semiconductor refrigeration piece 512, heat conduction temperature measurement subassembly 513 heat conductivility is good, can guarantee that the cold mirror temperature is the same with heat conduction subassembly, semiconductor refrigeration piece 512 sets up on subassembly base 511, the controlled cooling of semiconductor refrigeration piece 512.
The detection assembly B52 comprises an irradiation light source 521, a light homogenizing assembly 522 and an optical dew condensation detection assembly 523, wherein the light homogenizing assembly 522 and the optical dew condensation detection assembly 523 are adhered together, and the irradiation light source 521 is arranged above the light homogenizing assembly 522. At the beginning of detection, the illumination source 521 illuminates the cooling mirror 514 through the light equalizing assembly 522, so that the optical detection assembly reaches the maximum detection sensitivity. When the detection gas is introduced into the sample gas channel, the cold mirror assembly 51 begins to cool, when the spectrum assembly 3 detects that condensation occurs, the device can automatically record the temperature at the moment, the temperature is the dew point, and the corresponding water content can be obtained by looking up the table.
The principle of the invention is as follows:
and detecting the content of the CF4 component by adopting an infrared spectrum absorption technology.
and detecting the contents of SO2 and H2S components by adopting an ultraviolet spectrum absorption technology.
And (4) integrating an electrochemical detection technology to realize content detection of the rest gas components.
And the comprehensive scheme of infrared spectrum and ultraviolet spectrum absorption is adopted, the component content detection with overlapped absorption peaks is realized, and the data of electrochemical component content detection is compared and analyzed, so that the detection precision is further improved.
The related terms of the invention are explained:
SF 6: sulfur hexafluoride (sulfur hexafluoride) is a stable gas that is colorless, odorless, nontoxic, and noncombustible, and SF6 is widely used as an insulating medium for high-voltage electrical equipment.
SO 2: sulfur dioxide, SF6 gas and one of the decomposition products of the solid insulation inside the electrical equipment.
H2S: hydrogen sulfide, SF6 gas, and one of the decomposition products of the solid insulation inside the electrical equipment.
CO: carbon monoxide, SF6 gas and one of the decomposition products of solid insulation inside electrical equipment.
CO 2: carbon dioxide, SF6 gas and one of the decomposition products of the solid insulation inside the electrical equipment.
CF 4: carbon tetrafluoride, SF6 gas, and one of the decomposition products of solid insulation material inside the electrical equipment.
AlF 3: aluminum fluoride, H2S in the decomposition product of SF6 gas, and the like, and a metal aluminum oxide component of the internal conductor of the apparatus under specific conditions.
CuF 2: copper difluoride, H2S in SF6 gas decomposition products, and the like, and metallic copper and oxide components of the internal conductor of the equipment under specific conditions.
Absorption spectrum: an absorption spectrum (absorption spectrum) refers to a spectrum generated by a substance absorbing a photon and transitioning from a low energy level to a high energy level. Absorption spectra are also known as absorption curves. Different wavelengths of light have different effects on the sample and different absorption intensities. In brief, it is: the same substance is irradiated by light rays with different wavelengths, and the expressed spectral curves are different; light rays with the same wavelength irradiate the same substance, and the expressed spectral curves are different. This can be used as a spectral absorption method to distinguish different components in a gas mixture.
In summary, the following steps: the invention relates to a multifunctional comprehensive analyzer for each component of a decomposition product in SF6 gas, which adopts an infrared absorption spectrum technology and an ultraviolet absorption spectrum technology and combines an electrochemical sensor technology to detect the content of trace CF4 gas components and the content of other decomposition product components in SF6 gas, and simultaneously utilizes a high-low two-frequency band spectrum technology to perform auxiliary content analysis to realize the purpose of accurately detecting the SF6 gas decomposition product components.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.
Claims (9)
1. The comprehensive analyzer for each component of a decomposition product in multifunctional SF6 gas is characterized by comprising a gas inlet and filtering component (1), a gas shunt metering component (2), a spectrum component (3), an electrochemical component (4), a cold mirror micro-water component (5), a data processing component (6) and a total data output component (7), wherein a gas to be detected is connected with the gas inlet and filtering component (1) through a gas inlet pipeline, the gas inlet and filtering component (1) is connected with the gas shunt metering component (2), the gas shunt metering component (2) is respectively connected with the spectrum component (3) and the cold mirror micro-water component (5), the spectrum component (3) is connected with the electrochemical component (4), the electrochemical component (4) and the cold mirror micro-water component (5) are electrically connected with the data processing component (6), and the data processing component (6) is electrically connected with the total data output component (7), wherein the content of the first and second substances,
The gas inlet and filter assembly (1) filters possible large-particle impurities so as to prevent the impurities from damaging a subsequent gas circuit and a detection assembly, and the gas inlet and filter assembly (1) is physically filtered, so that the gas inlet and filter assembly does not have any influence on each component in the gas and does not influence component analysis data;
The gas path of the gas shunt metering component (2) is divided into two paths, one path is a component analysis gas path, the other path is a moisture detection gas path, and each gas path independently meters gas;
The sample gas is irradiated by dual-band light in the spectrum assembly (3), and CF4 is detected and the content of the other components is predicted;
The sample gas after the spectrum component (3) enters an electrochemical component (4), and if the sample gas contains a certain decomposition product component, a corresponding electrochemical sensor outputs a corresponding signal;
the single path of sample gas passes through a cold mirror micro-water component (5), and is continuously cooled under the control of an instrument until the optical sensor detects that the mirror surface is dewed, then the temperature at that time is dew point data, and water content data is obtained according to different dew points and corresponding different water contents;
And the data processing component (6) and the total data output component (7) analyze, process and output the data of each sensor and component.
2. The multifunctional comprehensive analyzer for the components of the decomposition products in the SF6 gas as claimed in claim 1, wherein said gas shunt metering assembly (2) comprises a component metering channel and a micro-water metering channel, the component metering channel is connected with the sample gas in the spectrum assembly (3), and the micro-water metering channel is connected with the cold mirror micro-water assembly (5).
3. The comprehensive analyzer for the components of the decomposition products in the multifunctional SF6 gas as claimed in claim 1, wherein said spectrum assembly (3) comprises a light source assembly (31), a light splitting assembly (32), an absorption assembly (33) and a detection assembly A (34), the infrared light source and the ultraviolet light source enter the light splitting assembly (32) on the side through the processing of the light source assembly (31), the infrared light beam and the ultraviolet light beam are projected to the absorption assembly (33) through the reflection of the light splitting assembly (32), and the detection assembly A (34) is arranged under the absorption assembly (33).
4. The multifunctional comprehensive analyzer for the components of the decomposition products in SF6 gas as claimed in claim 3, wherein said light source module (31) comprises a mirror A (311), a slit grating A (312), a diffraction grating (313) and a slit grating B (314);
the light splitting component (32) comprises a reflecting mirror B (321), a half reflecting mirror (322), a reflecting mirror C (323) and a reflecting mirror D (324);
The absorption component (33) is internally provided with an absorption pool (331);
The detection assembly a (34) includes a crystal filter a (341), a crystal filter B (342), a photodetection a (343), and a photodetection B (344).
5. The multifunctional comprehensive analyzer of components of decomposition products in SF6 gas as claimed in claim 1, wherein said electrochemical module (4) comprises a gas branching and metering module (41), a gas channel (42), a sensor array (43) and a data output module (44), and the sample gas channel passes through the gas branching and metering module (41), the gas channel (42) and the sensor array (43) in sequence, and finally passes through the data output module (44).
6. The multifunctional comprehensive analyzer for the components of the decomposition products in SF6 gas as claimed in claim 5, wherein said sensor array (43) is preset with 10 sensor positions at present, 7 sensor positions at present and three sensor positions at present.
7. The multifunctional SF6 gas decomposition product comprehensive analyzer, according to claim 1, wherein said cold mirror micro water assembly (5) is composed of a cold mirror assembly (51) and a detection assembly (52).
8. the comprehensive analyzer for the components of the decomposition products in the multifunctional SF6 gas as claimed in claim 7, wherein the cold mirror assembly (51) is composed of an assembly base (511), a semiconductor chilling plate (512), a heat conduction temperature measurement assembly (513) and a chilling mirror surface (514), the chilling mirror surface (514) is adhered to the heat conduction temperature measurement assembly (513), the heat conduction temperature measurement assembly (513) is adhered to the semiconductor chilling plate (512), and the semiconductor chilling plate (512) is disposed on the assembly base (511).
9. The comprehensive analyzer for the components of the decomposition products in the multifunctional SF6 gas as claimed in claim 7, wherein said detecting element B (52) is composed of an irradiation light source (521), a light equalizing element (522) and an optical dew detection element (523), the light equalizing element (522) and the optical dew detection element (523) are adhered together, and the irradiation light source (521) is disposed above the light equalizing element (522).
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