CN105547408A - Transformer oil level monitoring system based on power equipment infrared image - Google Patents
Transformer oil level monitoring system based on power equipment infrared image Download PDFInfo
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- CN105547408A CN105547408A CN201610067141.4A CN201610067141A CN105547408A CN 105547408 A CN105547408 A CN 105547408A CN 201610067141 A CN201610067141 A CN 201610067141A CN 105547408 A CN105547408 A CN 105547408A
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- Prior art keywords
- imaging device
- infrared
- optical imaging
- conservator
- lens
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
Abstract
The invention discloses a transformer oil level monitoring system based on a power equipment infrared image. The system comprises a first optical imaging device arranged near an oil conservator of a transformer, a second optical imaging device, an optical fiber image transmitting bundle, an infrared detector near the second optical imaging device and a control device connected with the infrared detector, wherein the optical fiber image transmitting bundle is provided with an input end face located on one side of the first optical imaging device and an output end face located on one side of the second optical imaging device. The first optical imaging device maps an oil conservator infrared radiation energy field to the input end face of the optical fiber image transmitting bundle, the oil conservator infrared radiation energy field is transmitted to the output end from the input end face through the optical fiber image transmitting bundle, the oil conservator infrared radiation energy field of the output end is coupled with the infrared detector through the second optical imaging device, and the infrared detector converts the oil conservator infrared radiation energy field into optical information corresponding to the energy field, and the optical information is transmitted to the control device. The transformer oil level monitoring system is high in electromagnetic interference resistance.
Description
Technical field
The present invention relates to a kind of transformer oil level monitoring system, particularly relate to a kind of transformer oil level monitoring system based on infrared image.
Background technology
In order to ensure the safe operation of electrical network, improve power supply quality, the on-line monitoring of power equipment and safe early warning are subject to the most attention of people.Oil level is one of important monitoring parameter of power transformer, and Timeliness coverage oil level is too low or too high and take corresponding measure for guaranteeing that power transformer safe operation is significant.The principle higher than air themperature according to temperature of oil in transformer, utilizes infrared imaging device clearly can monitor oil level in the conservator of transformer.Current most infrared detection method still adopts the hand-held infrared measurement of temperature of staff or Image-forming instrument regularly to patrol and examine equipment, time and effort consuming.The remote image monitoring system occurred in recent years, realizes regular patrolling and examining by fixing infrared camera, decreases manual labor's amount to a certain extent.But infrared camera must be arranged near transformer could obtain conservator thermal-induced imagery effectively, and its photoelectric conversion process is inevitably subject to the interference of strong-electromagnetic field around.
Summary of the invention
The object of this invention is to provide a kind of transformer oil level monitoring system based on power equipment infrared image, this system can monitor transformer oil level by automatic on-line, and has stronger anti-electromagnetic interference capability.
According to foregoing invention object, the present invention proposes a kind of transformer oil level monitoring system based on power equipment infrared image, it comprises:
First optical imaging device, it is located near the conservator of transformer;
Second optical imaging device;
Optical fiber image transmission beam, it has the input end face being positioned at first this side of optical imaging device and the output end face being positioned at second this side of optical imaging device;
Infrared eye, it is located near the second optical imaging device;
Control device, it is connected with described infrared eye;
Wherein, conservator infrared energy field is mapped to the input end face of optical fiber image transmission beam by the first optical imaging device, described conservator infrared energy field is transferred to output end face from input end face by optical fiber image transmission beam, the conservator infrared energy field of described output end face is coupled into described infrared eye by described second optical imaging device, conservator infrared energy field is converted to optical information corresponding with it by described infrared eye, and transfers to control device.
Transformer oil level monitoring system based on power equipment infrared image of the present invention, first optical imaging device, optical fiber image transmission beam and the second optical imaging device are set between its conservator at transformer and infrared eye, because described optical fiber image transmission beam can be set to longer transmission range, thus make infrared eye need not be arranged near the conservator of transformer, to avoid strong-electromagnetic field environment, avoid being subject to strong-electromagnetic field interference; Meanwhile, described first optical imaging device, optical fiber image transmission beam and the second optical imaging device are passive optical device, have stronger anti-electromagnetic interference capability; Therefore, the entirety of the transformer oil level monitoring system based on power equipment infrared image of the present invention has stronger anti-electromagnetic interference capability.
During the work of the transformer oil level monitoring system based on power equipment infrared image of the present invention, conservator infrared energy field is mapped to the input end face of optical fiber image transmission beam by the first optical imaging device, described conservator infrared energy field is transferred to output end face from input end face by optical fiber image transmission beam, the conservator infrared energy field of described output end face is coupled into described infrared eye by described second optical imaging device, conservator infrared energy field is converted to optical information corresponding with it by described infrared eye, and transfers to control device.Because the conservator of the transformer under running status can occur obvious temperature contrast with surrounding environment, and conservator inside has oil part also can form obvious temperature contrast with without oil part, conservator infrared energy field is corresponding with the temperature field on conservator surface, the oil level in the conservator of the therefore corresponding transformer in conservator infrared energy field.Described control device analyzes described conservator infrared energy field based on described optical information, thus realizes the automatic on-line monitoring of transformer oil level.
Further, of the present invention based in the transformer oil level monitoring system of power equipment infrared image, described infrared eye comprises:
Planar array photoelectric commutator, the conservator infrared energy field of described output end face is coupled into this planar array photoelectric commutator by described second optical imaging device, and conservator infrared energy field is also converted to electric signal corresponding with it by described planar array photoelectric commutator;
Signal processing unit, it is connected with described planar array photoelectric commutator, and described signal processing unit generates conservator infrared energy field picture according to described electric signal;
Photoelectricity modulating unit, it is connected with described signal processing unit, and conservator infrared energy field picture is converted to described optical information corresponding with it by described photoelectricity modulating unit.
In such scheme, conservator infrared energy field is converted to electric signal corresponding with it by planar array photoelectric commutator by described infrared eye, conservator infrared energy field picture is generated according to described electric signal again by signal processing unit, finally by photoelectricity modulating unit, described conservator infrared energy field picture is converted to optical information corresponding with it, thus conservator infrared energy field is converted to described optical information corresponding with it.
Further, of the present invention based in the transformer oil level monitoring system of power equipment infrared image, described first optical imaging device comprises the first different lens of focal length and the second lens, and the disc of described conservator and the input end face of described optical fiber image transmission beam are corresponding to be respectively positioned on the focal plane of the first lens and the second lens.
In such scheme, first lens and the second lens form an optical lens group, the disc of usual described conservator and the input end face of described optical fiber image transmission beam lay respectively at described optical lens group both sides, and lay respectively on the focal plane of the first lens and the second lens, form image relation, to make the first optical imaging device, conservator infrared energy field is mapped to the input end face of optical fiber image transmission beam.
Further, above-mentioned based in the transformer oil level monitoring system of power equipment infrared image, the focal length of described first lens is f
1, the focal length of described second lens is f
2, the disc diameter of described conservator is d
1, the diameter of described input end face is d
2, then the relation of four meets: d
1f
2be slightly less than f
1d
2.
In such scheme, according to lens imaging principle, on the input end face that conservator infrared energy field is mapped to optical fiber image transmission beam, the diameter of imaging is d
1f
2/ f
1, be mapped to picture in order to what obtain complete conservator infrared energy field, the diameter of this imaging should be slightly less than the diameter d of input end face
2, i.e. d
1f
2/ f
1value be slightly less than d
2, be also d
1f
2be slightly less than f
1d
2.
Further, aforementioned based in the transformer oil level monitoring system of power equipment infrared image, described second optical imaging device comprises the 3rd different lens of focal length and the 4th lens, and the output end face of described optical fiber image transmission beam and described planar array photoelectric commutator are corresponding to be respectively positioned on the focal plane of the 3rd lens and the 4th lens.
In such scheme, 3rd lens and the 4th lens form an optical lens group, output end face and the described planar array photoelectric commutator of usual described optical fiber image transmission beam lay respectively at described optical lens group both sides, and lay respectively on the focal plane of the 3rd lens and the 4th lens, form image relation, to make the second optical imaging device, the conservator infrared energy field of described output end face is coupled into described infrared eye.
Further, above-mentioned based in the transformer oil level monitoring system of power equipment infrared image, the focal length of described 3rd lens is f
3, the focal length of described 4th lens is f
4, the diameter of described output end face is d
3, the length of side of described planar array photoelectric commutator is d
4, then the relation of four meets: d
3f
4be slightly less than f
3d
4.
In such scheme, described planar array photoelectric commutator is generally square.According to lens imaging principle, the diameter that conservator infrared energy field is mapped to imaging on planar array photoelectric commutator is d
3f
4/ f
3, be mapped to picture in order to what obtain complete conservator infrared energy field, the diameter of this imaging should be slightly less than the length of side d of planar array photoelectric commutator
4, i.e. d
3f
4/ f
3value be slightly less than d
4, be also d
3f
4be slightly less than f
3d
4.
Further, of the present invention based in the transformer oil level monitoring system of power equipment infrared image, at least one of them and the optical fiber image transmission beam of described first optical imaging device and the second optical imaging device are encapsulated in same optical telescopic sleeve, to simplify site installation test, ensure installation accuracy, and be convenient for carrying.
Further, of the present invention based in the transformer oil level monitoring system of power equipment infrared image, described first optical imaging device, the second optical imaging device, optical fiber image transmission beam and infrared eye are all encapsulated in same optical telescopic sleeve, to simplify site installation test, ensure installation accuracy, and be convenient for carrying.
Further, of the present invention based in the transformer oil level monitoring system of power equipment infrared image, described optical fiber image transmission beam adopts infrared chalcogenide glass material to make.
In such scheme, described optical fiber image transmission beam adopts the infrared chalcogenide glass material of low-loss to make usually, have pliable and tough flexible characteristic, and resolution is high, undistorted to the transmission of described conservator infrared energy field.
Transformer oil level monitoring system based on power equipment infrared image of the present invention, its advantage compared with traditional solution comprises:
(1) automatic on-line monitoring transformer oil level, alternative Traditional Man is patrolled and examined, and saves manpower, improves monitoring efficiency, real-time and accuracy, can Timeliness coverage oil level too low or too high and take corresponding measure for guaranteeing power transformer safe operation;
(2) infrared camera near traditional conservator being arranged on transformer is easily subject to strong-electromagnetic field interference, infrared eye in the present invention need not be arranged near the conservator of transformer, thus avoid being subject to strong-electromagnetic field interference, simultaneously be passive optical device as the first optical imaging device of intermediate transmission media, optical fiber image transmission beam and the second optical imaging device, there is stronger anti-electromagnetic interference capability, therefore, the entirety of the transformer oil level monitoring system based on power equipment infrared image of the present invention has stronger anti-electromagnetic interference capability.
Accompanying drawing explanation
Fig. 1 is the first optical imaging device side structure schematic diagram of the transformer oil level monitoring system based on power equipment infrared image of the present invention under a kind of embodiment.
Fig. 2 is the second optical imaging device side structure schematic diagram of the transformer oil level monitoring system based on power equipment infrared image of the present invention under a kind of embodiment.
Embodiment
Below in conjunction with Figure of description and specific embodiment, the transformer oil level monitoring system based on power equipment infrared image of the present invention is described in further detail.
Fig. 1 illustrates the first optical imaging device side structure of the transformer oil level monitoring system based on power equipment infrared image of the present embodiment, and Fig. 2 illustrates the second optical imaging device side structure of the transformer oil level monitoring system based on power equipment infrared image of the present embodiment.
Incorporated by reference to reference to figure 1 and Fig. 2, the transformer oil level monitoring system based on power equipment infrared image of the present embodiment, automatic on-line for transformer oil level is monitored, comprise: the first optical imaging device 2, second optical imaging device 4, optical fiber image transmission beam 3, infrared eye 5 and control device 6, wherein: the first optical imaging device 2 comprises the first different lens 21 and the second lens 22 of focal length; Second optical imaging device 4 comprises the 3rd different lens 41 of focal length and the 4th lens 42; Optical fiber image transmission beam 3 has the input end face A being positioned at first this side of the optical imaging device 2 and output end face B being positioned at second this side of optical imaging device 4; Infrared eye 5, it comprises the planar array photoelectric commutator 51, signal processing unit 52 and the photoelectricity modulating unit 53 that connect successively.
As shown in Figure 1, in the present embodiment, the first optical imaging device 2 is located near the conservator 1 of transformer; The disc C of the conservator 1 and input end face A of optical fiber image transmission beam 3 is corresponding to be respectively positioned on the focal plane of the first lens 21 and the second lens 22; The focal length of the first lens 21 is f
1, the focal length of the second lens 22 is f
2, the disc C diameter of conservator 1 is d
1, the diameter of input end face A is d
2, the relation of four meets: d
1f
2be slightly less than f
1d
2.
As shown in Figure 2, in the present embodiment, infrared eye 5 is located near the second optical imaging device 4, and control device 6 is connected with the photoelectricity modulating unit 53 of infrared eye 5; The output end face B of optical fiber image transmission beam 3 and plane array photoelectric converter 51 are corresponding to be respectively positioned on the focal plane of the 3rd lens 41 and the 4th lens 42; The focal length of the 3rd lens 41 is f
3, the focal length of described 4th lens 42 is f
4, the diameter of output end face B is d
3, planar array photoelectric commutator 51 is square, and its length of side is d
4, then the relation of four meets: d
3f
4be slightly less than f
3d
4.
Below in conjunction with Fig. 1 and Fig. 2, the course of work of the present embodiment and Installation and Debugging are described.
When the transformer oil level monitoring system based on power equipment infrared image of the present embodiment works, the conservator infrared energy field of the disc C from conservator 1 is mapped to the input end face A of optical fiber image transmission beam 3 by the first optical imaging device 2, this conservator infrared energy field is transferred to output end face B from input end face A by optical fiber image transmission beam 3, the conservator infrared energy field of output end face B is coupled into the planar array photoelectric commutator 51 of infrared eye 5 by the second optical imaging device 4, this conservator infrared energy field is converted to electric signal corresponding with it by planar array photoelectric commutator 51, signal processing unit 52 generates conservator infrared energy field picture according to this electric signal, this conservator infrared energy field picture is converted to optical information corresponding with it by photoelectricity modulating unit 53, and transfer to control device 6.Due to the oil level in the conservator 1 of the corresponding transformer in conservator infrared energy field, control device 6 analyzes above-mentioned conservator infrared energy field based on above-mentioned optical information, thus realizes the automatic on-line monitoring of transformer oil level.
In the present embodiment, first optical imaging device 2, second optical imaging device 4, optical fiber image transmission beam 3 and infrared eye 5 are all encapsulated in same optical telescopic sleeve, wherein: the first lens 21 in the first optical imaging device 2 and between the input end face A of the second lens 22 and optical fiber image transmission beam 3 relative position relation fix, during in-site installation, adjustment f
1make f
1slightly larger than f
2d
1/ d
2, to meet d
1f
2be slightly less than f
1d
2, thus make conservator infrared energy field complete map from the disc C of conservator 1 to the input end face A of optical fiber image transmission beam 3; Second optical imaging device 4 and infrared eye 5 are mutually permanently connected, the relative position relation of the planar array photoelectric commutator 51 in the 3rd lens 41, the 4th lens 42 and external detector 5 in the output end face B of optical fiber image transmission beam 3, the second optical imaging device 4, signal processing unit 52, photoelectricity modulating unit 53 is fixed, and meets d
3f
4be slightly less than f
3d
4, thus make the conservator infrared energy field complete map of output end face B and be coupled into the planar array photoelectric commutator 51 of infrared eye 5.
Above-mentioned optical telescopic sleeve can from optical fiber image transmission beam 3 separately, during in-site installation, near the conservator 1 optical telescopic sleeve part comprising the first optical imaging device 2 being located at transformer, to comprise the electromagnetic interference (EMI) region of optical telescopic sleeve part away from scene of the second optical imaging device 4, centre is connected by optical fiber image transmission beam 3.Optical fiber image transmission beam 3 adopts the infrared chalcogenide glass material of low-loss to make.The photoelectricity modulating unit 53 of infrared eye 5 adopts common single-mode fiber 7 by above-mentioned optical transmission of information to control device 6.
The transformer oil level monitoring system based on power equipment infrared image of the present embodiment, owing to adopting such scheme, can be monitored transformer oil level by automatic on-line, and have stronger anti-electromagnetic interference capability.
That enumerates it should be noted that above is only specific embodiments of the invention, obviously the invention is not restricted to above embodiment, has many similar changes thereupon.If all distortion that those skilled in the art directly derives from content disclosed by the invention or associates, protection scope of the present invention all should be belonged to.
Claims (9)
1., based on a transformer oil level monitoring system for power equipment infrared image, it is characterized in that, comprising:
First optical imaging device, it is located near the conservator of transformer;
Second optical imaging device;
Optical fiber image transmission beam, it has the input end face being positioned at first this side of optical imaging device and the output end face being positioned at second this side of optical imaging device;
Infrared eye, it is located near the second optical imaging device;
Control device, it is connected with described infrared eye;
Wherein, conservator infrared energy field is mapped to the input end face of optical fiber image transmission beam by the first optical imaging device, described conservator infrared energy field is transferred to output end face from input end face by optical fiber image transmission beam, the conservator infrared energy field of described output end face is coupled into described infrared eye by described second optical imaging device, conservator infrared energy field is converted to optical information corresponding with it by described infrared eye, and transfers to control device.
2., as claimed in claim 1 based on the transformer oil level monitoring system of power equipment infrared image, it is characterized in that, described infrared eye comprises:
Planar array photoelectric commutator, the conservator infrared energy field of described output end face is coupled into this planar array photoelectric commutator by described second optical imaging device, and conservator infrared energy field is also converted to electric signal corresponding with it by described planar array photoelectric commutator;
Signal processing unit, it is connected with described planar array photoelectric commutator, and described signal processing unit generates conservator infrared energy field picture according to described electric signal;
Photoelectricity modulating unit, it is connected with described signal processing unit, and conservator infrared energy field picture is converted to described optical information corresponding with it by described photoelectricity modulating unit.
3. as claimed in claim 1 based on the transformer oil level monitoring system of power equipment infrared image, it is characterized in that, described first optical imaging device comprises the first different lens of focal length and the second lens, and the disc of described conservator and the input end face of described optical fiber image transmission beam are corresponding to be respectively positioned on the focal plane of the first lens and the second lens.
4., as claimed in claim 3 based on the transformer oil level monitoring system of power equipment infrared image, it is characterized in that, the focal length of described first lens is f
1, the focal length of described second lens is f
2, the disc diameter of described conservator is d
1, the diameter of described input end face is d
2, then the relation of four meets: d
1f
2be slightly less than f
1d
2.
5. as claimed in claim 2 based on the transformer oil level monitoring system of power equipment infrared image, it is characterized in that, described second optical imaging device comprises the 3rd different lens of focal length and the 4th lens, and the output end face of described optical fiber image transmission beam and described planar array photoelectric commutator are corresponding to be respectively positioned on the focal plane of the 3rd lens and the 4th lens.
6., as claimed in claim 5 based on the transformer oil level monitoring system of power equipment infrared image, it is characterized in that, the focal length of described 3rd lens is f
3, the focal length of described 4th lens is f
4, the diameter of described output end face is d
3, the length of side of described planar array photoelectric commutator is d
4, then the relation of four meets: d
3f
4be slightly less than f
3d
4.
7. as claimed in claim 1 based on the transformer oil level monitoring system of power equipment infrared image, it is characterized in that, at least one of them and the optical fiber image transmission beam of described first optical imaging device and the second optical imaging device are encapsulated in same optical telescopic sleeve.
8. as claimed in claim 1 based on the transformer oil level monitoring system of power equipment infrared image, it is characterized in that, described first optical imaging device, the second optical imaging device, optical fiber image transmission beam and infrared eye are all encapsulated in same optical telescopic sleeve.
9., as claimed in claim 1 based on the transformer oil level monitoring system of power equipment infrared image, it is characterized in that, described optical fiber image transmission beam adopts infrared chalcogenide glass material to make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610067141.4A CN105547408A (en) | 2016-01-29 | 2016-01-29 | Transformer oil level monitoring system based on power equipment infrared image |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610067141.4A CN105547408A (en) | 2016-01-29 | 2016-01-29 | Transformer oil level monitoring system based on power equipment infrared image |
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| Publication Number | Publication Date |
|---|---|
| CN105547408A true CN105547408A (en) | 2016-05-04 |
Family
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|---|---|---|---|
| CN201610067141.4A Pending CN105547408A (en) | 2016-01-29 | 2016-01-29 | Transformer oil level monitoring system based on power equipment infrared image |
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Cited By (3)
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| CN108180960A (en) * | 2017-12-22 | 2018-06-19 | 深圳供电局有限公司 | The oil condition detection method and device of a kind of transformer |
| CN108871491A (en) * | 2018-07-06 | 2018-11-23 | 中国电力科学研究院有限公司 | A kind of bushing shell for transformer intelligence oil level gauge |
| CN112129348A (en) * | 2020-09-21 | 2020-12-25 | 国网河北省电力有限公司检修分公司 | Oil level monitoring-based transformer oil leakage monitoring device |
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Application publication date: 20160504 |