CN109765468B - GIS internal SF based on optical fiber ring resonator6Decomposition component in-situ detection device - Google Patents
GIS internal SF based on optical fiber ring resonator6Decomposition component in-situ detection device Download PDFInfo
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 86
- 238000001514 detection method Methods 0.000 title claims abstract description 74
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 34
- 239000000835 fiber Substances 0.000 claims abstract description 86
- 238000001069 Raman spectroscopy Methods 0.000 claims abstract description 46
- 230000008878 coupling Effects 0.000 claims abstract description 40
- 238000010168 coupling process Methods 0.000 claims abstract description 40
- 238000005859 coupling reaction Methods 0.000 claims abstract description 40
- 238000000354 decomposition reaction Methods 0.000 claims abstract description 32
- 238000001914 filtration Methods 0.000 claims abstract description 30
- 238000001228 spectrum Methods 0.000 claims abstract description 9
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- 238000003199 nucleic acid amplification method Methods 0.000 claims description 2
- 238000005259 measurement Methods 0.000 abstract description 2
- 229910018503 SF6 Inorganic materials 0.000 description 6
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- 238000010586 diagram Methods 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
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- 238000013021 overheating Methods 0.000 description 1
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- 230000035945 sensitivity Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229960000909 sulfur hexafluoride Drugs 0.000 description 1
- LSJNBGSOIVSBBR-UHFFFAOYSA-N thionyl fluoride Chemical compound FS(F)=O LSJNBGSOIVSBBR-UHFFFAOYSA-N 0.000 description 1
- 238000013519 translation Methods 0.000 description 1
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Abstract
GIS internal SF based on optical fiber ring resonator6The in-situ detection device for the decomposition components comprises a laser unit, an incident light optical fiber coupling unit, an optical fiber annular resonant cavity, an emergent light optical fiber coupling unit, a detection laser and Rayleigh scattered light filtering unit, a spatial filtering unit and a spectrum acquisition unit. The invention realizes the in-situ detection of the gas to be detected in the GIS based on the hollow photonic band gap fiber with the drilled surface, improves the effective collection efficiency of Raman scattering, and greatly enhances the signal intensity of Raman scattering; based on the optical fiber ring resonator, the laser power in the hollow-core photonic band gap fiber is improved, and the Raman scattering signal intensity is further improved. Can realize SF inside GIS6The in-situ detection of the decomposition components can be better applied to SF inside the GIS6The field of decomposition component measurement.
Description
Technical Field
The invention belongs to the field of insulation on-line monitoring and fault diagnosis of electrical equipment, and relates to SF (sulfur hexafluoride) inside a GIS (gas insulated switchgear)6Detection of decomposed components, in particular to GIS internal SF based on optical fiber ring resonator6Decomposition component in-situ detection device.
Background
With the development of ultra-high voltage transmission strategy, SF6The Gas Insulated Switchgear (GIS) has an increasing proportion in electric power equipment, and higher requirements are put on an online monitoring technology of the GIS. Due to defects in manufacture, installation, transportation and operation, GIS is prone to discharge and overheating faults, resulting in SF6The gas is decomposed and SO is generated2F2、SOF2、CF4、SO2、H2S, COS and CO2And characteristic gas components reflecting the type of insulation defects, the discharge level and the aging degree of the insulation material in the GIS equipment are used for reducing the insulation performance of the GIS equipment. For SF6The effective detection of the decomposed characteristic components is the key for realizing GIS insulation fault diagnosis. The conventional detection methods such as a gas detection tube method, a chromatography-mass spectrometry method, an electrochemical sensor method, an ion mobility meter and an infrared absorption spectrometry method have the problems of low detection precision, easy aging of a chromatographic column, low gas selectivity, cross interference of absorption peaks of partially decomposed gas and the like, and cannot be applied to on-line monitoring of a GIS on site.
The Raman spectrum technology can realize the rapid and simultaneous detection of a plurality of gas components by using single-wavelength laser, has good selectivity and high detection sensitivity, and does not need sample preparation and component separation. However, the gas has a small Raman scattering sectional area and low Raman scattering intensity, so that the minimum gas detection concentration based on the Raman spectroscopy cannot meet the actual requirements of GIS online monitoring. The laser action power, the effective action path length of the laser and the gas and the Raman scattering photon collection efficiency are improved, and the Raman scattering intensity of the trace gas can be effectively improved. Therefore, a method and an apparatus for increasing laser power, effective working path length, and raman scattered light collection efficiency while enabling SF have been studied6The in-situ detection of the decomposition characteristic components has great practical significance for realizing the GIS full-life cycle management, improving the equipment utilization rate, reducing the equipment maintenance cost, improving the equipment operation and maintenance intellectualization and ensuring the safe production of the power grid.
Disclosure of Invention
In view of this, the present invention aims at the problem that the prior art is difficult to realize the SF inside the GIS6The current situation of in-situ detection of decomposition components provides an SF inside a GIS based on an optical fiber ring resonator6The method and the device for in-situ detection of the Raman spectrum of the decomposed components realize in-situ detection of gas to be detected in a GIS based on the hollow photonic band gap fiber with a drilled surface, improve the effective collection angle of Raman scattering and greatly enhance the signal intensity of the Raman scattering; based on the optical fiber ring resonator, the laser power in the hollow-core photonic band gap fiber is improved, and the Raman scattering signal intensity is further improved.
The invention aims to realize the technical scheme that the SF inside the GIS is based on the optical fiber ring-shaped resonant cavity6Decomposition component in situ detection device, its characterized in that: the device comprises a laser unit, an incident light fiber coupling unit, an optical fiber ring resonator, an emergent light fiber coupling unit, a detection laser and Rayleigh scattering light filtering unit, a spatial filtering unit and a spectrum acquisition unit; the laser unit emits laser, the laser enters the incident light optical fiber coupling unit, enters the emergent light optical fiber coupling unit through the optical fiber ring-shaped resonant cavity, passes through the detection laser and Rayleigh scattering light filtering unit and the spatial filtering unit, and finally enters the spectrum acquisition unit;
the laser unit is used for providing a light source required by detection; the incident light fiber coupling unit is used for realizing that laser is coupled to enter the fiber ring-shaped resonant cavity and improving the coupling efficiency; the optical fiber ring-shaped resonant cavity is used for realizing in-situ detection of SF6 decomposition components in the GIS and improving the intensity of Raman scattering signals, and comprises an optical fiber coupler and a hollow-core photonic band gap optical fiber; the emergent light fiber coupling unit is used for collimating Raman scattering signals output by the fiber ring resonator, so that the signal collection rate is improved; the detection laser and Rayleigh scattered light filtering unit is used for filtering detection laser and Rayleigh scattered light in emergent light of the optical fiber annular resonant cavity; the spatial filtering unit is used for realizing spatial filtering and improving the signal-to-noise ratio of the Raman scattering signal; the signal acquisition unit is used for acquiring and detecting Raman signals.
Further, the laser unit comprises a solid-state laser, a laser beam expander, a reflector A and a reflector B.
Further, the output wavelength of the laser is 532nm, the power is 1.5W, and the diameter of a light spot is 1.5 mm; the amplification factor of the laser beam expander is 4 times.
Furthermore, the incident light fiber coupling unit comprises an objective lens A, an objective lens adjusting frame A, a fiber coupler fixing device A, a displacement platform A and a photoelectric detector.
Further, the magnification of the objective lens A is 50 times; the objective lens adjusting frame A is a 5-axis adjustable lens frame.
Further, the objective lens a is installed in the objective lens adjusting frame a, and is used for adjusting the relative position and the relative angle between the objective lens a and the incident laser to improve the coupling efficiency and the coupling efficiency.
Furthermore, the emergent light fiber coupling unit comprises an objective lens B, an objective lens adjusting frame B, a fiber coupler fixing device B and a displacement platform B.
Further, the magnification of the objective lens B is 50 times; the objective lens adjusting frame B is a 5-axis adjustable lens frame.
Further, the objective lens B is mounted in the objective lens adjusting frame B, and is used for adjusting the relative position and the relative angle of the objective lens B and the laser emitted from the optical fiber ring resonator, so as to improve the collimation efficiency.
Further, the detection laser and rayleigh scattered light filtering unit includes a filter a and a filter B.
Further, the filter A is a high-pass filter with a cut-off wavelength of 533nm for 45-degree incident light; the filter B is a high-pass filter with the cutoff wavelength of 533nm for 0-degree incident light.
Further, the hollow-core photonic band gap fiber is a fiber with air holes as a fiber core, the surface of the fiber is drilled in a nanometer scale by using a femtosecond laser, and the holes extend from the surface of the fiber to the fiber core.
Further, the length of the hollow-core photonic band gap fiber is 20 cm.
Further, the fiber coupler comprises two multimode fibers with fused cores, and 4 fiber ports are formed.
Further, the fiber coupler coupling ratio is 99.5%: 0.5 percent.
Further, the hollow-core photonic band gap fiber has surface holes extending from the surface of the fiber to the core; the radius of the holes is less than or equal to 0.65nm, the drilling mode is to perform mirror image drilling on the side surface of the optical fiber, the drilling is performed in the same mode on the corresponding side after a row of nano-scale holes are drilled, the spacing between the drilled holes is 0.01mm, and the number of the drilled holes in each row is 60-80; during detection, the hollow-core photonic band gap fiber is arranged in the GIS, gas molecules decomposed by SF6 can enter the air fiber core of the GIS along the hole on the surface of the fiber, and the air-core photonic band gap fiber core is used as an air chamber for Raman detection.
Further, the spatial filtering unit includes a lens a, a lens B, and a pinhole.
Further, the focal length of the lens A is 25.4 mm; the focal length of the lens B is 3.1 mm; the pinhole diameter was 50 μm.
Furthermore, the signal acquisition unit is used for acquiring and detecting Raman signals and comprises a lens C, a lens displacement device, a spectrometer and a CCD; the spectrometer and the CCD are used for collecting and detecting Raman scattering signals.
Further, the focal length of the lens C is 50.8mm, and the lens C is arranged on a 3-axis adjustable lens displacement device.
Further, the lens A, the lens B and the lens C are all plano-convex lenses.
Due to the adoption of the technical scheme, the invention has the following advantages:
the invention can realize SF inside the GIS6And (3) in-situ detection of the decomposition components, and the Raman scattering collection angle and the laser power are enhanced through the optical fiber ring resonator, so that the intensity of Raman spectrum scattering signals is improved. The invention can be better applied to SF inside the GIS6The field of decomposition component measurement.
Drawings
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings, in which:
FIG. 1 shows the SF inside the GIS based on the fiber ring resonator6A schematic diagram of a decomposition component in-situ detection device;
FIG. 2 is a schematic diagram of a fiber ring resonator.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings; it should be understood that the preferred embodiments are illustrative of the invention only and are not limiting upon the scope of the invention.
FIG. 1 shows the SF inside the GIS based on the fiber ring resonator6The schematic diagram of the in-situ detection device for the decomposition component Raman spectrum comprises a laser unit, an incident light fiber coupling unit, a fiber ring resonator, an emergent light fiber coupling unit, a detection laser and Rayleigh scattering light filtering unit, a spatial filtering unit and a spectrum acquisition unit.
The laser unit is used for providing a light source required by detection and comprises a laser, a laser beam expander reflector A and a reflector B. The laser is a solid-state laser, the power of the laser is 1.5W, the laser which emits laser with the wavelength of 532nm and the diameter of a light spot of 1.5mm is expanded to 6mm after passing through a laser beam expander with the magnification of 4 times. The reflectivity of the reflector A and the reflector B to laser with the wavelength of 532nm is more than 99%, and the reflectors are used for adjusting the position and the angle of the laser emitted by the laser. The laser emitted by the laser unit enters the incident light fiber coupling unit.
The incident light optical fiber coupling unit is used for realizing that laser is coupled to enter an optical fiber annular resonant cavity and improving coupling efficiency and comprises an objective lens A, an objective lens adjusting frame A, an optical fiber coupler fixing device A, a displacement platform A and a photoelectric detector. The magnification of the objective lens A is 50 times, and the objective lens A is arranged in an objective lens adjusting frame A, wherein the objective lens adjusting frame A is a 5-axis adjustable lens frame and is used for adjusting the relative position and the relative angle of the objective lens A and incident laser so as to improve the coupling efficiency; the optical fiber coupler fixing device A is a device which is specially designed for clamping a multimode optical fiber incident port in an optical fiber coupler and is placed above a displacement platform A, wherein the displacement platform A is a 3-axis adjustable displacer, the adjusting precision is 500nm, and the optical fiber coupler fixing device A is used for adjusting the relative position of the multimode optical fiber incident port in the optical fiber coupler and the emergent laser of an objective lens A so as to improve the coupling efficiency; the photoelectric detector is used for detecting the power of laser emitted by the optical fiber ring resonator and reflecting the coupling efficiency. When the detection is started, the objective lens adjusting frame A and the displacement platform A need to be accurately adjusted, so that the coupling efficiency is maximized, and then the objective lens adjusting frame A and the displacement platform A are locked, so that the influence of factors such as external vibration on the coupling efficiency is prevented. The laser emitted by the laser unit can efficiently enter the optical fiber ring resonator through the incident light optical fiber coupling unit.
The optical fiber ring-shaped resonant cavity is used for realizing SF inside the GIS6In situ raman detection of the decomposed components and increasing the raman scattering signal intensity. FIG. 2 is a schematic diagram of the fiber ring resonator, which includes a fiber coupler and a hollow-core photonic band-gap fiber. The optical fiber coupler comprises two multimode optical fibers with fused fiber cores, wherein the fused fiber cores are in fiber core radiuses and 6mm in length, and the total length of the fused fiber cores is 4 optical fiber ports: the multimode fiber incident port is a port I, the multimode fiber emergent port is a port II, the coupled multimode fiber A port is a port II, the coupled multimode fiber B port is a port II, and the port III and the port II are respectively welded at two ends of a hollow photonic band gap fiber. The coupling ratio of the optical fiber coupler is 99.5%: 0.5%, namely 99.5% of laser of the port II 2 leads to the port II 1, and 0.5% leads to the port II 5; 99.5% of laser of the port leads to the port and 0.5% leads to the port. Laser emitted by the laser unit enters the port I of the optical fiber ring-shaped resonant cavity through the incident light optical fiber coupling unit, then a part of the laser enters the port I, and the laser is circularly transmitted between the port III and the port IV and the hollow photonic band gap optical fiber to form resonance, so that the laser power in the hollow photonic band gap optical fiber is greatly increased, and the Raman scattering signal intensity is enhanced. The hollow-core photonic band gap fiber is an optical fiber with an air hole as a fiber core, the length of the hollow-core photonic band gap fiber is 20cm, the surface of the optical fiber is drilled in a nanometer mode by using a femtosecond laser, and a hole extends from the surface of the optical fiber to the fiber core. The radius of the hole is less than or equal to 0.65nm, and the drilling mode is mirror image drilling and drilling on the side surface of the optical fiberAnd drilling holes on the corresponding side in the same mode after the rows of the nanometer-scale holes, wherein the drilling hole interval is 0.01mm, and the number of the drilling holes in each row is 60-80. During detection, the hollow photonic band gap fiber in the fiber ring resonator is partially arranged inside the GIS, gas molecules inside the GIS can enter the air fiber core of the GIS along the hole on the surface of the hollow photonic band gap fiber, and the air cavity of the hollow photonic band gap fiber is used as an air chamber for Raman detection. The device generates a Raman effect in the optical fiber, scattered light is conducted by the optical fiber, the effective collection angle of the scattered Raman light is far larger than that of the traditional collection mode, and the collected Raman signals can be greatly increased. The Raman scattering light is output to the emergent light fiber coupling unit through the port II.
The emergent light fiber coupling unit is used for collimating Raman scattering signals output by the fiber ring resonator, and the signal collection rate is improved. Comprises an objective lens B, an objective lens adjusting frame B, an optical fiber coupler fixing device B and a displacement platform B. The magnification of the objective lens B is 50 times, and the objective lens B is arranged in an objective lens adjusting frame B, wherein the objective lens adjusting frame B is a 5-axis adjustable lens frame and is used for adjusting the relative position and the relative angle of the objective lens B and the emergent laser of the optical fiber ring-shaped resonant cavity so as to improve the collimation efficiency; the optical fiber coupler fixing device B is a device which is specially designed for clamping an exit port of a multimode optical fiber in an optical fiber coupler and is arranged above a displacement platform B, wherein the displacement platform A is a 3-axis adjustable displacer, the adjusting precision is 500nm, and the optical fiber coupler fixing device B is used for adjusting the relative position of the exit port of the multimode optical fiber in the optical fiber coupler and an objective lens B so as to improve the collimation efficiency; during detection, the objective adjusting frame B and the displacement platform B need to be accurately adjusted to maximize collimation efficiency, and then the objective adjusting frame B and the displacement platform B are locked to prevent external vibration and other factors from influencing the collimation efficiency.
The detection laser and Rayleigh scattering light filtering unit is used for filtering detection laser and Rayleigh scattering light in emergent light of the optical fiber ring resonator, and comprises a filter A and a filter B. The filter A is a high-pass filter with the cutoff wavelength of 533nm for 45-degree incident light, Raman scattering light with the wavelength larger than 533nm can be efficiently transmitted, and laser and Rayleigh scattering light with the wavelength smaller than 533nm can be efficiently reflected. The filter B is a high-pass filter with the cutoff wavelength of 533nm for 0-degree incident light, Raman scattering light with the wavelength larger than 533nm can be efficiently transmitted, and laser and Rayleigh scattering light with the wavelength smaller than 533nm can be efficiently reflected. The detection laser and Rayleigh scattered light in the optical fiber ring resonator can be efficiently filtered by the two filters, and the detection efficiency of the Raman scattered light is improved. The filter A can also reflect the detection laser emitted by the optical fiber ring resonator to a photoelectric detector for detecting the coupling efficiency of the incident light optical fiber coupling unit. After the output signal of the optical fiber ring resonator is filtered to remove the detection laser and the Rayleigh scattering light, the residual Raman scattering light is transmitted to the spatial filtering unit.
The spatial filtering unit is used for realizing spatial filtering and improving the signal-to-noise ratio of Raman scattering signals and comprises two lenses and a pinhole, wherein the two lenses are a lens A and a lens B respectively. The focal length of the lens A is 25.4mm, and the lens A is used for focusing a light beam and penetrating through the pinhole; the focal length of the lens B is 3.1mm, and the lens B is used for beam collimation; the diameter of the pinhole is 50 μm, and the pinhole is arranged in a 2-axis adjustable translation adjusting frame. When the detection is started, the position of the pinhole needs to be accurately adjusted through the 3-axis adjustable lens frame, so that the Raman scattered light focused by the lens A efficiently passes through the pinhole. And transmitting the Raman scattering signals to a signal acquisition unit after the spatial filtering.
The signal acquisition unit is used for acquiring and detecting Raman signals and comprises a lens C, a lens displacement device, a spectrometer and a CCD. Wherein the focal length of the lens C is 50.8mm, and the lens C is arranged on a 3-axis adjustable lens displacement device. The lens displacement device is used for accurately adjusting the relative position between the Raman scattering light focused by the lens C and the slit of the spectrometer, so that the Raman scattering light efficiently enters the spectrometer and is transmitted to the CCD for spectrum detection.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and it is apparent that those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (18)
1. GIS internal SF based on optical fiber ring resonator6Decomposition component in situ detection device, its characterized in that:
the device comprises a laser unit, an incident light fiber coupling unit, an optical fiber ring resonator, an emergent light fiber coupling unit, a detection laser and Rayleigh scattering light filtering unit, a spatial filtering unit and a spectrum acquisition unit; the laser unit emits laser, the laser enters the incident light optical fiber coupling unit, enters the emergent light optical fiber coupling unit through the optical fiber ring-shaped resonant cavity, passes through the detection laser and Rayleigh scattering light filtering unit and the spatial filtering unit, and finally enters the spectrum acquisition unit;
the laser unit is used for providing a light source required by detection; the optical fiber coupling unit of the incident light is used for realizing that the laser is coupled and enters the optical fiber ring-shaped resonant cavity and improving the coupling efficiency, and comprises an objective lens A, an objective lens adjusting frame A, an optical fiber coupler fixing device A, a displacement platform A and a photoelectric detector; the optical fiber ring-shaped resonant cavity is used for realizing SF inside the GIS6The in-situ detection of the decomposition components and the improvement of the Raman scattering signal intensity comprise an optical fiber coupler and a hollow-core photonic band-gap optical fiber, wherein the hollow-core photonic band-gap optical fiber takes an air hole as a fiber core, the hollow-core photonic band-gap optical fiber is provided with a surface hole, and the drilling mode is mirror image drilling on the side surface of the optical fiber; the emergent light fiber coupling unit is used for collimating Raman scattering signals output by the fiber ring resonator and improving the signal collection rate, and comprises an objective lens B, an objective lens adjusting frame B, a fiber coupler fixing device B and a displacement platform B; the detection laser and Rayleigh scattered light filtering unit is used for filtering detection laser and Rayleigh scattered light in emergent light of the optical fiber annular resonant cavity; the spatial filtering unit is used for realizing spatial filtering and improving the signal-to-noise ratio of the Raman scattering signal; the spectrum acquisition unit is used for acquiring and detecting Raman signals.
2. GIS internal SF according to claim 16Decomposition component in situ detection device, its characterized in that:
the laser unit comprises a solid-state laser, a laser beam expander, a reflector A and a reflector B.
3. GIS internal SF according to claim 26Decomposition component in situ detection device, its characterized in that:
the output wavelength of the laser is 532nm, the power is 1.5W, and the diameter of a light spot is 1.5 mm; the amplification factor of the laser beam expander is 4 times.
4. GIS internal SF according to claim 16Decomposition component in situ detection device, its characterized in that:
the magnification of the objective lens A is 50 times; the objective lens adjusting frame A is a 5-axis adjustable lens frame.
5. GIS internal SF according to claim 1 or 46Decomposition component in situ detection device, its characterized in that:
the objective lens A is arranged in the objective lens adjusting frame A and is used for adjusting the relative position and the relative angle of the objective lens A and the incident laser so as to improve the coupling efficiency.
6. GIS internal SF according to claim 16Decomposition component in situ detection device, its characterized in that:
the magnification of the objective lens B is 50 times; the objective lens adjusting frame B is a 5-axis adjustable lens frame.
7. GIS internal SF according to claim 1 or 66Decomposition component in situ detection device, its characterized in that:
the objective lens B is arranged in the objective lens adjusting frame B and used for adjusting the relative position and the relative angle of the objective lens B and the emergent laser of the optical fiber ring-shaped resonant cavity so as to improve the collimation efficiency.
8. The method of claim 1GIS internal SF based on optical fiber ring resonator6Decomposition component in situ detection device, its characterized in that:
the detection laser and Rayleigh scattered light filtering unit comprises a filter A and a filter B;
the filter A is a high-pass filter with the cut-off wavelength of 533nm for 45-degree incident light; the filter B is a high-pass filter with the cutoff wavelength of 533nm for 0-degree incident light.
9. GIS internal SF according to claim 16Decomposition component in situ detection device, its characterized in that:
the hollow-core photonic band gap fiber is an optical fiber with an air hole as a fiber core, the surface of the optical fiber realizes nanometer-level drilling by using a femtosecond laser, and the hole extends from the surface of the optical fiber to the fiber core.
10. The GIS internal SF based on fiber ring resonator according to claim 96Decomposition component in situ detection device, its characterized in that: the length of the hollow-core photonic band gap fiber is 20 cm.
11. GIS internal SF according to claim 16Decomposition component in situ detection device, its characterized in that: the fiber coupler comprises two multimode fibers with fused fiber cores, and 4 fiber ports are formed.
12. The GIS internal SF based on fiber ring resonator as claimed in claim 116Decomposition component in situ detection device, its characterized in that: the coupling ratio of the optical fiber coupler is 99.5%: 0.5 percent.
13. GIS internal SF according to any of claims 9-12 and based on fiber ring resonator6Decomposition component in situ detection device, its characterized in that:
the hole extends from the surface of the optical fiber to the fiber core; the radius of the holes is less than or equal to 0.65nm, and a row of nano-scale holes are drilledDrilling holes on the corresponding side in the same mode, wherein the drilling hole interval is 0.01mm, and the number of each row of drilling holes is 60-80; during detection, the hollow-core photonic band gap fiber is arranged in a GIS (gas insulated switchgear), and SF6Decomposed gas molecules enter the air fiber core of the optical fiber along the hole on the surface of the optical fiber, and the hollow photonic band gap optical fiber core is used as an air chamber for Raman detection.
14. GIS internal SF according to claim 16Decomposition component in situ detection device, its characterized in that:
the spatial filtering unit comprises a lens A, a lens B and a pinhole.
15. The GIS internal SF based on fiber ring resonator of claim 146Decomposition component in situ detection device, its characterized in that:
the focal length of the lens A is 25.4 mm; the focal length of the lens B is 3.1 mm; the pinhole diameter was 50 μm.
16. The GIS internal SF based on fiber ring resonator of claim 156Decomposition component in situ detection device, its characterized in that:
the spectrum acquisition unit is used for acquiring and detecting Raman signals and comprises a lens C, a lens displacement device, a spectrometer and a CCD; the spectrometer and the CCD are used for collecting and detecting Raman scattering signals.
17. The GIS internal SF based on fiber ring resonator of claim 166Decomposition component in situ detection device, its characterized in that:
the focal length of the lens C is 50.8mm, and the lens C is arranged on a 3-axis adjustable lens displacement device.
18. The in-situ detection device for the SF6 decomposition components in the GIS based on the fiber ring resonator as claimed in claim 17, wherein:
and the lens A, the lens B and the lens C are all plano-convex lenses.
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| CN112683876B (en) * | 2020-12-04 | 2022-05-10 | 重庆大学 | Method and system for detecting trace gas optical fiber photo-thermal stimulated Raman spectrum |
| CN113008866A (en) * | 2021-03-05 | 2021-06-22 | 云南电网有限责任公司电力科学研究院 | Detection apparatus for GIS decomposed gas |
| CN114878496A (en) * | 2022-04-16 | 2022-08-09 | 国网江苏省电力有限公司超高压分公司 | Annular optical fiber SF based on ultraviolet absorption spectrum 6 Decomposition product detection device and method |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1467492A (en) * | 2002-07-11 | 2004-01-14 | 中国科学院大连化学物理研究所 | Testing method and system for measuring gas component concentration using spontaneous Raman scattering technology |
| CN104807765A (en) * | 2015-05-04 | 2015-07-29 | 华北电力大学 | High-sensitivity spectral absorption damped oscillation cavity gas detection device of transformer oil |
| CN104807805A (en) * | 2015-05-04 | 2015-07-29 | 华北电力大学 | Detection device for gas dissolved in transformer oil based on Raman spectrum |
| CN105181674A (en) * | 2015-10-21 | 2015-12-23 | 南京工业大学 | Raman spectral enhancement system and enhancement method based on photonic crystal fiber resonant cavity |
| CN105241865A (en) * | 2015-10-27 | 2016-01-13 | 杭州电子科技大学 | Raman gas analyzing device of column vector field excited hollow core photonic crystal fiber |
| CN106253047A (en) * | 2016-09-13 | 2016-12-21 | 中国人民解放军国防科学技术大学 | Tunable mid-infrared light fibre mixed gas cascade Ramar laser |
| CN206161530U (en) * | 2016-08-31 | 2017-05-10 | 国家电网公司 | Sulfur hexafluoride analyte raman spectroscopy on -line monitoring analysis appearance |
| CN106940311A (en) * | 2017-05-03 | 2017-07-11 | 重庆大学 | The in-situ detection method of fault characteristic gases is dissolved in a kind of transformer oil |
-
2019
- 2019-02-02 CN CN201910107425.5A patent/CN109765468B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1467492A (en) * | 2002-07-11 | 2004-01-14 | 中国科学院大连化学物理研究所 | Testing method and system for measuring gas component concentration using spontaneous Raman scattering technology |
| CN104807765A (en) * | 2015-05-04 | 2015-07-29 | 华北电力大学 | High-sensitivity spectral absorption damped oscillation cavity gas detection device of transformer oil |
| CN104807805A (en) * | 2015-05-04 | 2015-07-29 | 华北电力大学 | Detection device for gas dissolved in transformer oil based on Raman spectrum |
| CN105181674A (en) * | 2015-10-21 | 2015-12-23 | 南京工业大学 | Raman spectral enhancement system and enhancement method based on photonic crystal fiber resonant cavity |
| CN105241865A (en) * | 2015-10-27 | 2016-01-13 | 杭州电子科技大学 | Raman gas analyzing device of column vector field excited hollow core photonic crystal fiber |
| CN206161530U (en) * | 2016-08-31 | 2017-05-10 | 国家电网公司 | Sulfur hexafluoride analyte raman spectroscopy on -line monitoring analysis appearance |
| CN106253047A (en) * | 2016-09-13 | 2016-12-21 | 中国人民解放军国防科学技术大学 | Tunable mid-infrared light fibre mixed gas cascade Ramar laser |
| CN106940311A (en) * | 2017-05-03 | 2017-07-11 | 重庆大学 | The in-situ detection method of fault characteristic gases is dissolved in a kind of transformer oil |
Non-Patent Citations (1)
| Title |
|---|
| 基于激光拉曼光谱的SF6分解特征气体检测方法研究;张凯;《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》;20190115(第01期);第C042-190页 * |
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