CN106644088A - Transformer charged detection system and method based on infrared temperature measurement - Google Patents
Transformer charged detection system and method based on infrared temperature measurement Download PDFInfo
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- CN106644088A CN106644088A CN201611178917.6A CN201611178917A CN106644088A CN 106644088 A CN106644088 A CN 106644088A CN 201611178917 A CN201611178917 A CN 201611178917A CN 106644088 A CN106644088 A CN 106644088A
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- 238000001514 detection method Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000009529 body temperature measurement Methods 0.000 title abstract 2
- 238000006243 chemical reaction Methods 0.000 claims abstract description 6
- 238000005259 measurement Methods 0.000 claims description 17
- 230000005855 radiation Effects 0.000 claims description 15
- 230000005611 electricity Effects 0.000 claims description 9
- 238000003384 imaging method Methods 0.000 claims description 6
- 238000002405 diagnostic procedure Methods 0.000 claims description 5
- 239000011159 matrix material Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 230000007812 deficiency Effects 0.000 claims description 3
- 229910052732 germanium Inorganic materials 0.000 claims description 3
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 238000012856 packing Methods 0.000 claims description 3
- 239000004065 semiconductor Substances 0.000 claims description 3
- 238000003860 storage Methods 0.000 claims description 3
- 230000004888 barrier function Effects 0.000 claims 1
- 238000001914 filtration Methods 0.000 abstract description 2
- 230000007547 defect Effects 0.000 description 5
- 238000009826 distribution Methods 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 4
- 230000007774 longterm Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000003491 array Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000002510 pyrogen Substances 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- 230000005457 Black-body radiation Effects 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 238000003199 nucleic acid amplification method Methods 0.000 description 1
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- 230000003595 spectral effect Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000033772 system development Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/0096—Radiation pyrometry, e.g. infrared or optical thermometry for measuring wires, electrical contacts or electronic systems
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J2005/0077—Imaging
Abstract
The invention discloses a transformer charged detection system and a method based on infrared temperature measurement. A controller controls the shutter time of an infrared planar array detector and the focusing action of a lens; the infrared planar array detector acquires infrared data of the transformer; the controller receives the signals acquired by the infrared planar array detector; the signals are subjected to digital-to-analog conversion to obtain digital voltage signals; the digital voltage signals are filtered and the data are cached to a memory; an upper computer reads the data after filtering; a fault identification algorithm is used for carrying out early warning on fault possibly happening in the transformer, and the possible fault is imaged on an image for marking. The uncooled infrared focal plane array detector based on a microbolometer is used for reading voltage signals generated by the circuit, the working condition of the transformer is judged in real time through the fault detection algorithm, early warning is carried out before possible fault, and charged detection is realized.
Description
Technical field
The present invention relates to a kind of be based on infrared measurement of temperature transformer belt electricity detecting system and method.
Background technology
Transformer is the nucleus equipment of China's power system, and it occupies particularly important in the operation and maintenance of power system
Status, once break down, it is easy to cause the collapse of electrical network, affect production and live, cause huge economic loss, because
As long as this can timely find the failure of transformer and successfully repair, it is possible to be greatly enhanced stablizing for Operation of Electric Systems
Property, and common preventative maintenance and periodic inspection all need interruption maintenance, this will reduce the reliability and economy of power supply
Property, therefore using the method for live detection can just seeming necessary in the case of not power-off.
Existing frequently-used infrared measurement of temperature mode is periodically to carry out manual inspection to power equipment using handheld thermal imager, this
Plant mode testing staff workload big, and in recent years power system development is rapid, and power equipment is more, and some transformer stations also build
It is deep in the mountains, this has been resulted in, and patrol officer is easily tired, increased the insecurity of work, the present invention can realizes that equipment shows
The daily timing automatic of field is patrolled and examined, it is easy to the equipment for finding hot defect in time, and Hand-Held Thermal Imager can only manually be sentenced
It is disconnected whether faulty, therefore the present invention can use the direct Judging fault of fault algorithms and early warning by Infrared Plane detector.
The content of the invention
The present invention is in order to solve the above problems, it is proposed that one kind is based on infrared measurement of temperature transformer belt electricity detecting system and side
Method, the present invention controls the aperture time of array type detector and the focus movement of camera lens using controller, using Fault Identification
Algorithm carries out early warning to the failure that may occur in transformer, and it is marked when image is imaged.
To achieve these goals, the present invention is adopted the following technical scheme that：
One kind be based on infrared measurement of temperature transformer belt electricity detecting system, including Infrared Plane detector array, controller and on
Position machine, the controller controls the aperture time of Infrared Plane detector array, and the focus movement of camera lens, while receiving red
The signal of outerplanar detector array collection carries out digital-to-analogue conversion and obtains digital voltage signal, and it is filtered, by data
In being cached to memory, the host computer reads filtered data, using Fault Identification algorithm to occurring in transformer
Failure carry out early warning, and it is indicated in image imaging.
The Infrared Plane detector array includes multiple micro-metering bolometers, changes sensitive unit's own temperature red to perceive
External radiation, the micro-metering bolometer is arranged in the vacuum chamber that inwall is black matrix.
The bridge floor of the micro-metering bolometer is made up of the thermo-sensitive material that can absorb infra-red radiation, and its resistance is warm with itself
Degree has the relation of near-linear.
The Infrared Plane detector array is also additionally provided with reading circuit, and the signal to sensing is pre-processed, on time
Sequence reads.
The Infrared Plane detector array adopts the micro- Dewar packing forms of metal, the embedded antireflection germanium in top of shell
Window, adds semiconductor focus stabilizer.
Control aperture time is that, come the switch time of control machinery shutter, focusing is in control by controller by controlled motor
Coremaking piece changes focal length by controlled motor, and a pinpointed focus is chosen under image focusing algorithm.
One kind is based on infrared measurement of temperature transformer belt electro-detection method, and controller controls the shutter of Infrared Plane detector array
Time, and the focus movement of camera lens, Infrared Plane detector array gathers the infrared data of transformer, and controller receives infrared
The signal of planar array detector collection carries out digital-to-analogue conversion and obtains digital voltage signal, and it is filtered, and data are delayed
In being stored to memory, host computer reads filtered data, using Fault Identification algorithm to the possible failure for occurring in transformer
Early warning is carried out, and it is indicated in image imaging.
The Fault Identification algorithm is：The maximum temperature of one detection zone is set used as threshold value, once exceed this threshold
Value, then it is assumed that transformer breaks down, and does not use relative method to differentiate, and recognizes failure approximate location, preserves data, if do not had
There is temperature exceeding standard, then diverse location in detection zone is judged using relative temperature diagnostic method, discriminant alarm classification, if sentencing
There is failure in disconnected classification, then send alarm and preserve fault message.
The Fault Identification algorithm be absolute temperature diagnostic method, the size of degree, load rate of plant according to temperature exceeding standard,
The importance and equipment of equipment bears the size of mechanical stress to determine the property of equipment deficiency.
The Fault Identification algorithm is relative temperature method of discrimination, calculate in infrared detection two corresponding points for measuring temperature it
Between the temperature difference with wherein compared with focus temperature rise ratio percentage.
The Fault Identification algorithm is similar method of discrimination, symmetrical identical with three-phase equipment using three-phase current, according to inclined
Poor size is it may determine that failure whether there is and its order of severity and property.
Beneficial effects of the present invention are：The present invention is visited using the un-cooled infrared focal plane array based on micro-metering bolometer
The voltage signal that device reading circuit is produced is surveyed, the working condition of transformer is judged in real time by fault detection algorithm,
Early warning is carried out before failure is likely to occur, live detection is realized.And tentatively position failure judgement can occur, through image
Mark after process, give direct result, the maintenance for after provides reliable information.
Description of the drawings
Fig. 1 (a), (b) are the spatial distribution schematic diagram of different radiation sources；
Fig. 2 is that overall structure sets up block diagram；
Fig. 3 is fault pre-alarming algorithm flow chart.
Specific embodiment：
Below in conjunction with the accompanying drawings the invention will be further described with embodiment.
1st, the operation principle of infrared measurement of temperature
The source of infrared radiation can be divided into two classes according to the difference of spatial distribution：One kind is referred to as heat radiator, its spatial distribution
Curve be continuous, such as scorching hot solid or liquid；Another kind is selective radiation source, its spatial distribution be it is discrete, such as
Electrical discharge or flame in gas, now its infrared energy be concentrated in some narrow intervals, distribution be rendered as band
Shape or wire, such as Fig. 1.
When object temperature is higher than absolute zero, due to the presence of warm-up movement, outwards will radiate in the form of an electromagnetic wave
Energy, the energy of its radiation includes various wavelength, and wavelength is referred to as infrared ray, infrared detection between 0.76 μm～1000 μm
Basis be Planck blackbody radiation law, black matrix refers to all of infra-red radiation of absorption, the reflection without energy and transmission,
Its slin emissivity is 1, i.e., not outside emittance, and it has with the relation of wavelength：
MλFrom for blackbody spectrum radiosity；c1,c2For radiation constant；λ is the wavelength of spectral radiance；T is black matrix
Absolute temperature.From formula, object temperature is higher, and radianting capacity is stronger, i.e., resulting when thermometric is carried out to power equipment
Infra-red radiation it is stronger where, temperature is also higher.
2nd, the operation principle of micro-metering bolometer
Micro-metering bolometer is to perceive infra-red radiation by changing sensitive unit's own temperature, and he make use of ultrared
Fuel factor, multiple micro-metering bolometers constitute an array, and it is operated in the vacuum chamber that inwall is black matrix, the infrared spoke of distant place
Penetrate by Infrared Lens imaging and focusing to micro-metering bolometer, because its bridge floor is by the temperature-sensitive material that can absorb infra-red radiation
Material is made, and its resistance has the relation of approximately linear with own temperature.
The reading circuit of Infrared Detectors, major function is to carry out pre- place to its faint signal for sensing to infrared acquisition
Reason, filtering suppresses noise, amplifies signal, is cached, and finally reads by certain sequential.Micro-metering bolometer receives target
Infra-red radiation cause the change of own temperature, therewith self-resistance also changes, i.e., compared to its voltage of reference voltage
Change is there occurs, its small-signal can be amplified by integrating amplification circuit, then controlled by sampling hold circuit and gating,
A/D is converted into data signal output.
In order that micro-metering bolometer does to obtain responsiveness, it is desirable to which its working environment is in high vacuum, with most
Big degree reduces its air thermal conductivity, so generally adopting the micro- Dewar packing forms of metal.Because focal plane arrays (FPA) is in room temperature ring
Use under border, it is desirable to reduce scattering and disappearing for infra-red radiation as far as possible, make limited infrared signal be fully utilized, secondly require dimension
Hold the first reference itself temperature of each detection it is stable with it is consistent, improve its detectivity, improve the imaging of focal plane arrays (FPA)
Can, and to be conducive to the heat shed produced by chip long-term work, maintain its operation steady in a long-term.Therefore on the top of shell
The embedded antireflection germanium window in portion, adds semiconductor focus stabilizer, strengthens INFRARED ABSORPTION, reduces thermal noise, there is provided stable and uniform
Operating temperature.
As shown in Fig. 2 this kind of method is expected with the framework of FPGA+ARM, it has portability, low cost, is easy to out
Send out, the advantages of disposal ability is strong.Using FPGA the control signal of fast door motor is provided so as to control aperture time, and camera lens
Focus movement, and process is filtered to the digital voltage signal that micro-metering bolometer detector Jing digital-to-analogue conversions are obtained, with
And the transmission of data, by data buffer storage to memory.Communicated with FPGA using ARM modules, the digital independent handled well is gone out
Come, early warning is carried out to the failure that may occur in transformer using Fault Identification algorithm, and it is indicated when image is imaged
Come.
3rd, the fault pre-alarming algorithm of transformer
Three kinds of methods of conventional infrared diagnostics：
(1) absolute temperature method of discrimination compares GB763_90 according to the temperature data for measuring《Ac high-voltage electrical equipment is long-term
Heating during work》Relevant regulations, can according to the degree of temperature exceeding standard, the size of load rate of plant, the importance of equipment and
Equipment bears the size of mechanical stress to determine the property of equipment deficiency.Determination methods are as shown in table 1.
The absolute temperature of table 1 differentiates table
| Fault category | Surface temperature | Temperature rise | Relative error |
| Crisis thermal defect | >90 | >75 | >55 |
| Serious thermal defect | >75 | >65 | >50 |
| General thermal defect | >60 | >30 | >25 |
(2) relative temperature method of discrimination, relative temperature difference is referred in infrared detection between two corresponding points for measuring temperature
The temperature difference with wherein compared with focus temperature rise ratio percentage.Relative temperature difference δ is given by following equation：
τ in formula1And T1Represent temperature rise and the temperature of heat generating spot；τ2And T2Represent temperature rise and the temperature of normal corresponding point；T0
Represent temperature of the environment with reference to body.After for the temperature of current caused hot type equipment detection zone measuring, calculate according to formula 2
Go out relative temperature difference, the defect level and property of equipment are being judged by table 2.
The relative temperature difference criterion of the portion of electrical current pyrogenicity type equipment of table 2
(3) similar method of discrimination is in same electric loop, if three-phase current is symmetrical identical with three-phase equipment, can be with
Compare the temperature rise value of three-phase current pyrogenicity type equipment corresponding position, their temperature rise in theory should be identical, be not in
Relatively large deviation, therefore according to the size of deviation it may determine that failure whether there is and its order of severity and property.
Here differentiated using absolute temperature and relative temperature differentiates, the maximum temperature conduct of a detection zone is set first
Threshold value, once exceeding this threshold value, then it is assumed that transformer breaks down, and differentiates without the need for relative method, and recognizes failure substantially position
Put, preserve data.If without temperature exceeding standard, sentenced to diverse location in detection zone using relative temperature diagnostic method
It is disconnected, discriminant alarm classification, if judging there is failure in classification, sends alarm and preserves fault message.Flow chart such as Fig. 3.
Although the above-mentioned accompanying drawing that combines is described to the specific embodiment of the present invention, not to present invention protection model
The restriction enclosed, one of ordinary skill in the art should be understood that on the basis of technical scheme those skilled in the art are not
Need the various modifications made by paying creative work or deformation still within protection scope of the present invention.
Claims (10)
1. it is a kind of to be based on infrared measurement of temperature transformer belt electricity detecting system, it is characterized in that：Including Infrared Plane detector array, control
Device and host computer, the controller controls the aperture time of Infrared Plane detector array, and the focus movement of camera lens, while
The signal of reception Infrared Plane detector array collection carries out digital-to-analogue conversion and obtains digital voltage signal, and it is filtered,
By in data buffer storage to memory, the host computer reads filtered data, using Fault Identification algorithm to can in transformer
The failure that can occur carries out early warning, and it is indicated in image imaging.
2. as claimed in claim 1 a kind of based on infrared measurement of temperature transformer belt electricity detecting system, it is characterized in that：It is described infrared flat
Area array detector includes multiple micro-metering bolometers, changes sensitive unit's own temperature to perceive infra-red radiation, the micrometering spoke
Penetrate heat meter to be arranged in the vacuum chamber that inwall is black matrix.
3. as claimed in claim 1 a kind of based on infrared measurement of temperature transformer belt electricity detecting system, it is characterized in that：The micrometering spoke
Penetrate thermo-sensitive material of the bridge floor of heat meter by infra-red radiation can be absorbed to make, its resistance has the pass of near-linear with own temperature
System.
4. as claimed in claim 1 a kind of based on infrared measurement of temperature transformer belt electricity detecting system, it is characterized in that：It is described infrared flat
Area array detector is also additionally provided with reading circuit, and the signal to sensing is pre-processed, and is chronologically read.
5. as claimed in claim 1 a kind of based on infrared measurement of temperature transformer belt electricity detecting system, it is characterized in that：It is described infrared flat
Area array detector adopts the micro- Dewar packing forms of metal, the embedded antireflection germanium window in top of shell to add semiconductor focus steady
Determine device.
6. it is a kind of to be based on infrared measurement of temperature transformer belt electro-detection method, it is characterized in that：Controller controls Infrared Plane array detection
The aperture time of device, and the focus movement of camera lens, Infrared Plane detector array gathers the infrared data of transformer, controller
The signal of reception Infrared Plane detector array collection carries out digital-to-analogue conversion and obtains digital voltage signal, and it is filtered,
By in data buffer storage to memory, host computer reads filtered data, using Fault Identification algorithm to sending out in transformer
Raw failure carries out early warning, and it is indicated in image imaging.
7. as claimed in claim 6 a kind of based on infrared measurement of temperature transformer belt electro-detection method, it is characterized in that：The failure is known
Other algorithm is：The maximum temperature of one detection zone is set used as threshold value, once exceeding this threshold value, then it is assumed that transformer occurs
Failure, does not use relative method to differentiate, and recognizes failure approximate location, preserves data, if without temperature exceeding standard, using phase
Temperature diagnostic method is judged diverse location in detection zone, discriminant alarm classification, if judging, classification has failure, sends out
Go out alarm and preserve fault message.
8. as claimed in claim 6 a kind of based on infrared measurement of temperature transformer belt electro-detection method, it is characterized in that：The failure is known
Other algorithm be absolute temperature diagnostic method, the size of degree, load rate of plant, the importance of equipment and equipment according to temperature exceeding standard
Bear the size of mechanical stress to determine the property of equipment deficiency.
9. as claimed in claim 6 a kind of based on infrared measurement of temperature transformer belt electro-detection method, it is characterized in that：The failure is known
Other algorithm is relative temperature method of discrimination, calculate the temperature difference in infrared detection between two corresponding points for measuring temperature with it is wherein hotter
The percentage of the ratio of the temperature rise of point.
10. as claimed in claim 6 a kind of based on infrared measurement of temperature transformer belt electro-detection method, it is characterized in that：The failure
Recognizer is similar method of discrimination, symmetrical identical with three-phase equipment using three-phase current, and event is judged according to the size of deviation
Barrier whether there is and its order of severity and property.
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| CN201611178917.6A CN106644088A (en) | 2016-12-19 | 2016-12-19 | Transformer charged detection system and method based on infrared temperature measurement |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107219424A (en) * | 2017-06-14 | 2017-09-29 | 国网福建省电力有限公司 | A kind of infrared measurement of temperature heating defect method of discrimination and system |
| CN107907217A (en) * | 2017-11-11 | 2018-04-13 | 成都市龙泉星源机械厂 | A kind of Novel welder transformer On-line Fault monitoring system and monitoring method |
| CN109378943A (en) * | 2018-09-14 | 2019-02-22 | 岭澳核电有限公司 | A kind of motor bearings temperature anomaly processing method of nuclear reactor main pump |
| CN109412173A (en) * | 2018-10-31 | 2019-03-01 | 国网江苏省电力有限公司太仓市供电分公司 | A kind of parallel capacitor complete equipment overheat method for early warning based on the temperature difference |
| CN110137906A (en) * | 2019-04-26 | 2019-08-16 | 国网福建省电力有限公司邵武市供电公司 | A kind of anti-error guard method of converting station electric power equipment parallel connection array infrared monitoring |
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| CN205403962U (en) * | 2016-03-01 | 2016-07-27 | 西安工程大学 | Transformer bushing trouble online diagnosis system of generating heat on post based on infrared temperature measurement |
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| CN102169017A (en) * | 2010-12-25 | 2011-08-31 | 江西九江供电公司 | Online monitoring system for infrared thermal imaging of converting station |
| CN203940883U (en) * | 2014-05-18 | 2014-11-12 | 淮阴师范学院 | A kind of transformer fault diagnosis system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107219424A (en) * | 2017-06-14 | 2017-09-29 | 国网福建省电力有限公司 | A kind of infrared measurement of temperature heating defect method of discrimination and system |
| CN107907217A (en) * | 2017-11-11 | 2018-04-13 | 成都市龙泉星源机械厂 | A kind of Novel welder transformer On-line Fault monitoring system and monitoring method |
| CN109378943A (en) * | 2018-09-14 | 2019-02-22 | 岭澳核电有限公司 | A kind of motor bearings temperature anomaly processing method of nuclear reactor main pump |
| CN109412173A (en) * | 2018-10-31 | 2019-03-01 | 国网江苏省电力有限公司太仓市供电分公司 | A kind of parallel capacitor complete equipment overheat method for early warning based on the temperature difference |
| CN110137906A (en) * | 2019-04-26 | 2019-08-16 | 国网福建省电力有限公司邵武市供电公司 | A kind of anti-error guard method of converting station electric power equipment parallel connection array infrared monitoring |
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