CN110988613A - Light cone sensor based on partial discharge measurement - Google Patents
Light cone sensor based on partial discharge measurement Download PDFInfo
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- CN110988613A CN110988613A CN201911102296.7A CN201911102296A CN110988613A CN 110988613 A CN110988613 A CN 110988613A CN 201911102296 A CN201911102296 A CN 201911102296A CN 110988613 A CN110988613 A CN 110988613A
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- partial discharge
- silicon photodiode
- collecting probe
- light
- photon
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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
- G01R31/1218—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 using optical methods; using charged particle, e.g. electron, beams or X-rays
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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
- G01R31/1254—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 gas-insulated power appliances or vacuum gaps
Abstract
The invention discloses a light cone sensor for partial discharge measurement, and aims to provide a light cone sensor for partial discharge measurement with high sensitivity. The device comprises a photon collecting probe, a fixed shell, a silicon photodiode, a sealing flange plate and an aviation plug; the multi-core aviation plug is fixedly arranged in the middle of the sealing flange plate in a penetrating mode, and one end of the fixed shell is fixedly connected with the sealing flange plate through a screw; the photon collecting probe is fixedly arranged in the middle of the other end of the fixed shell in a penetrating manner, the silicon photodiode is fixedly arranged in the fixed shell, and the end face of the silicon photodiode is attached to the corresponding end face of the photon collecting probe; the photon collecting probe is in a cone frustum shape, and the small diameter end is a spherical surface; the photon collecting probe is made of a fluorescent glass material with high conversion efficiency; the wiring terminal of the aviation plug is connected with the wiring terminal of the silicon photodiode through a lead; the photon collecting probe is used for converting plane light receiving of the photoelectric converter into three-dimensional light receiving.
Description
Technical Field
The invention relates to the technical field of insulation state monitoring equipment of gas-insulated power equipment, in particular to a light cone sensor for partial discharge measurement.
Background
Gas-insulated devices inevitably suffer from insulation defects such as metal burrs, poor contacts, component looseness, metal particles and the like during manufacture, assembly and transport, can cause continuous or intermittent partial discharge at high field strengths, and can even cause breakdown flashover faults at overvoltage. The discharge in the equipment is an important reason causing insulation degradation and is an external expression form of insulation fault, and the detection and early warning of insulation defects and faults in the gas insulation equipment can be realized by detecting the partial discharge.
The discharge process in the equipment is accompanied with photon emission, the detection of discharge radiation photons is a detection method with higher confidence coefficient, compared with the existing ultrasonic method, ultrahigh frequency method and high frequency current method, the method has the natural advantage of no on-site electromagnetic interference, and the method can realize extremely high signal-to-noise ratio by matching with a single photon response device. The optical detection method for the equipment insulation partial discharge provided at present mainly comprises fluorescence optical fiber detection and acousto-optic detection, wherein the fluorescence optical fiber is arranged in the equipment to collect the discharged optical signal and then is guided to the outside to be connected with a photoelectric conversion and signal processing system; the latter converts an acoustic signal caused by discharge into an optical interference signal by using an acousto-optic interference principle, and the optical signal does not reflect the discharge characteristic in an intrinsic manner. In general, although the current optical partial discharge measurement sensor can limit non-optical interference, the sensitivity and the viewing angle range are limited, and the optical partial discharge measurement sensor is not widely applied to actual equipment.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a light cone sensor based on partial discharge measurement, which has large field of view and high sensitivity.
In order to solve the technical problems, the invention is realized by the following technical scheme:
a light cone sensor for partial discharge measurement comprises a photon collecting probe, a fixed shell, a silicon photodiode, a sealing flange plate and an aviation plug; the multi-core aviation plug is fixedly arranged in the middle of the sealing flange plate in a penetrating mode, and one end of the fixed shell is fixedly connected with the sealing flange plate through a screw; the photon collecting probe is fixedly arranged in the middle of the other end of the fixed shell in a penetrating manner, the silicon photodiode is fixedly arranged in the fixed shell, and the end face of the silicon photodiode is attached to the corresponding end face of the photon collecting probe; the photon collecting probe is in a cone frustum shape, and the small diameter end is a spherical surface; the photon collecting probe is made of a fluorescent glass material with high conversion efficiency; the wiring terminal of the aviation plug is connected with the wiring terminal of the silicon photodiode through a lead; the photon collecting probe is used for converting plane light receiving of the photoelectric converter into three-dimensional light receiving, and converting partial discharge ultraviolet light into visible light by utilizing a fluorescence effect.
Preferably, the side of the sealing flange plate facing the fixed shell is provided with an annular groove for mounting an O-shaped sealing ring.
Preferably, the photon collecting probe is used for converting partial discharge ultraviolet band light radiation within the range of 200 nm-400 nm into visible light within the range of 500 nm-700 nm, and the light transmittance of the photon collecting probe within the range of 300 nm-1000nm is more than 80%.
Preferably, the area of the end face of the photon collection probe, which is in contact with the solid-state silicon photodiode, is the same as the area of the detection end face of the solid-state silicon photodiode.
Preferably, the solid-state silicon photodiode adopts an avalanche type silicon diode, the spectral response range of the avalanche type silicon diode covers 400nm-1000nm, the diameter of a photosensitive surface is not less than 3mm, and the sensitivity is not less than 0.2A/W.
Preferably, the sealing flange is made of stainless steel or aluminum.
Compared with the prior art, the invention has the following advantages:
the invention provides a partial discharge sensor based on a fluorescent cone and a solid photomultiplier, which aims at the problems of small visual angle range and low sensitivity of optical partial discharge and is used for endoscopic detection of partial discharge in gas insulation equipment. The invention firstly utilizes the blue light excitation conversion effect of the fluorescent crystal to convert the light radiation with shorter wavelength into the visible light wave band with longer wavelength, and simultaneously utilizes the light cone structure to enlarge the light receiving area and the detection field of view of the photoelectric device; the photoelectric conversion is carried out by matching with a solid photomultiplier sensitive to visible light, and an photoelectric pulse signal is output, so that the effective detection of partial discharge light radiation is finally realized. The invention can be conveniently arranged in the gas insulation equipment, has small influence on the insulation in the equipment, and has the advantages of small volume, large view field, high sensitivity and the like. The method has practical significance for improving the operation maintenance and state detection quality of the gas insulation equipment in the transformer substation, finding hidden insulation defects, shortening equipment accident finding time and avoiding major operation accidents.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a basic block diagram of a partial discharge light cone sensor;
FIG. 2 is a basic schematic diagram of a partial discharge light cone sensor;
FIG. 3 is a schematic diagram of a fluorescence cone structure;
fig. 4 is a schematic view of the connection of the sealing flange plate and the equipment window.
In the figure: the device comprises a photon collecting probe 1, a silicon photodiode 2, a light receiving surface 3 of the silicon photodiode, a fixed shell 4, a sealing flange 5, an aviation plug 6, an annular groove 7, a screw 8 and an equipment window 10.
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 obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention. In the following description, for the purpose of clearly illustrating the structure and operation of the present invention, reference will be made to the accompanying drawings by way of directional terms, but terms such as "front", "rear", "left", "right", "up", "down", etc. should be construed as words of convenience and should not be construed as limiting terms.
Fig. 1-4 show a light cone sensor for partial discharge measurement for detecting weak light radiation of partial discharge generated inside a device, the light cone sensor including a photon collecting probe, a fixed shell, a silicon photodiode, a sealing flange and an aviation plug; the multi-core aviation plug is fixedly arranged in the middle of the sealing flange plate in a penetrating mode, and one end of the fixed shell is fixedly connected with the sealing flange plate through a screw; the photon collecting probe is fixedly arranged in the middle of the other end of the fixed shell in a penetrating manner, the silicon photodiode is fixedly arranged in the fixed shell, and the end face of the silicon photodiode is attached to the corresponding end face of the photon collecting probe; the photon collecting probe is in a cone frustum shape, and the small diameter end is a spherical surface; the photon collecting probe is made of a fluorescent glass material with high conversion efficiency, so that the detection field range is improved; the wiring terminal of the aviation plug is connected with the wiring terminal of the silicon photodiode through a lead; the photon collecting probe is used for converting plane light receiving of the photoelectric converter into three-dimensional light receiving, and converting partial discharge ultraviolet light into visible light by utilizing a fluorescence effect.
In this embodiment, one side of the sealing flange plate facing the fixed shell is provided with an annular groove for installing an O-shaped sealing ring, so that the O-shaped sealing ring can be conveniently installed. The photon collecting probe of the fluorescent glass can convert partial discharge ultraviolet band light radiation within the range of 200 nm-400 nm into visible light within the range of 500 nm-700 nm, and the visible light is received by the silicon photodiode, so that the sensor is ensured to have the optimal photon detection efficiency; the light transmittance of the photon collecting probe in the wavelength range of 300 nm-1000nm is more than 80%. The area of the end face of the photon collecting probe, which is in contact with the solid-state silicon photodiode, is the same as the area of the detection end face of the solid-state silicon photodiode. The solid-state silicon photodiode adopts an Avalanche Photo Diode (APD), the spectral response range of the solid-state silicon photodiode covers 400nm-1000nm, the diameter of a light sensing surface is not less than 3mm, and the sensitivity is not less than 0.2A/W.
In the embodiment, the upper end face of the photon collection probe is a spherical surface, the lower end face of the photon collection probe is a plane, the area of the lower end face of the photon collection probe is the same as that of the detection end face of the solid-state silicon photodiode, the diameter of the detachable end face is 3-5 mm, and the height of the detachable end face is 5-10 mm, as shown in the attached figure 2; the fixed shell can install the photon collection probe on the solid-state silicon photodiode detection surface, and the tight fit of photon collection probe bottom end face and solid-state silicon photodiode end face is guaranteed.
In this embodiment, the sealing flange plate is made of stainless steel or aluminum and used for mounting the sensor, and can be matched with a fixing shell to fix the photon collecting probe and the solid-state silicon photodiode in the equipment for internal measurement, and an O-shaped sealing ring and an annular groove are adopted to be fixedly connected with the equipment in a sealing manner, and the sealing aviation plug is connected with power lines and signal lines on the inner side and the outer side. As shown in fig. 4.
The circuits, electronic components and controllers involved in the present invention are all prior art and can be implemented completely by those skilled in the art without much notice.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. It will be understood by those skilled in the art that any modification, equivalent replacement, or improvement made on the technical solutions or parts of the technical features described in the above embodiments can be included in the scope of protection of the present invention within the spirit and principle of the present invention.
Claims (6)
1. The utility model provides a light cone sensor based on be used for partial discharge to measure, includes photon collection probe, set casing, silicon photodiode, sealed ring flange and aviation plug, its characterized in that: the multi-core aviation plug is fixedly arranged in the middle of the sealing flange plate in a penetrating mode, and one end of the fixed shell is fixedly connected with the sealing flange plate through a screw; the photon collecting probe is fixedly arranged in the middle of the other end of the fixed shell in a penetrating manner, the silicon photodiode is fixedly arranged in the fixed shell, and the end face of the silicon photodiode is attached to the corresponding end face of the photon collecting probe; the photon collecting probe is in a cone frustum shape, and the small diameter end is a spherical surface; the photon collecting probe is made of a fluorescent glass material with high conversion efficiency; the wiring terminal of the aviation plug is connected with the wiring terminal of the silicon photodiode through a lead; the photon collecting probe is used for converting plane light receiving of the photoelectric converter into three-dimensional light receiving, and converting partial discharge ultraviolet light into visible light by utilizing a fluorescence effect.
2. The light cone sensor for partial discharge measurement according to claim 1, wherein: and one side of the sealing flange plate facing the fixed shell is provided with an annular groove for mounting an O-shaped sealing ring.
3. The light cone sensor for partial discharge measurement according to claim 1 or 2, characterized in that: the photon collecting probe is used for converting partial discharge ultraviolet band light radiation within the range of 200 nm-400 nm into visible light within the range of 500 nm-700 nm, and the light transmittance of the photon collecting probe within the range of 300 nm-1000nm is larger than 80%.
4. The light cone sensor for partial discharge measurement according to claim 1 or 2, characterized in that: the area of the end face of the photon collecting probe, which is in contact with the solid-state silicon photodiode, is the same as the area of the detection end face of the solid-state silicon photodiode.
5. The light cone sensor for partial discharge measurement according to claim 1 or 2, characterized in that: the solid-state silicon photodiode adopts an avalanche type silicon diode, the spectral response range of the solid-state silicon photodiode covers 400nm-1000nm, the diameter of a photosensitive surface is not less than 3mm, and the sensitivity is not lower than 0.2A/W.
6. The light cone sensor for partial discharge measurement according to claim 1 or 2, characterized in that: the sealing flange plate is made of stainless steel or aluminum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201911102296.7A CN110988613A (en) | 2019-11-12 | 2019-11-12 | Light cone sensor based on partial discharge measurement |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911102296.7A CN110988613A (en) | 2019-11-12 | 2019-11-12 | Light cone sensor based on partial discharge measurement |
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| CN110988613A true CN110988613A (en) | 2020-04-10 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113009292A (en) * | 2021-02-25 | 2021-06-22 | 西安交通大学 | Partial discharge low-light spectrum detector |
| CN113671329A (en) * | 2021-10-25 | 2021-11-19 | 国网天津市电力公司电力科学研究院 | Multi-band fluorescence transposition partial discharge light radiation detection device and method |
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| CN113671329A (en) * | 2021-10-25 | 2021-11-19 | 国网天津市电力公司电力科学研究院 | Multi-band fluorescence transposition partial discharge light radiation detection device and method |
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Application publication date: 20200410 |