CN205808974U - A kind of Transformer Winding material intelligent diagnostics device - Google Patents
A kind of Transformer Winding material intelligent diagnostics device Download PDFInfo
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- CN205808974U CN205808974U CN201620701836.9U CN201620701836U CN205808974U CN 205808974 U CN205808974 U CN 205808974U CN 201620701836 U CN201620701836 U CN 201620701836U CN 205808974 U CN205808974 U CN 205808974U
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- 238000004804 winding Methods 0.000 title claims abstract description 69
- 239000000463 material Substances 0.000 title claims abstract description 55
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 26
- 229910052802 copper Inorganic materials 0.000 claims description 25
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 15
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- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 6
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Abstract
The utility model discloses a kind of Transformer Winding material intelligent diagnostics device, including PTC heater, temperature sensor, harvester and processor；PTC heater is connected with harvester by relay；Described PTC heater is for heating transformator phase joint conducting rod top；Temperature sensor is for gathering the temperature at transformator phase joint conducting rod top；Harvester is connected with processor.The diagnostic equipment that this utility model provides solves the problem such as the existing diagnostic equipment and method diagnosis speed is slow, diagnosis process complexity, and simple to operate, diagnosis speed is fast；This device is transformator material discrimination based on pyroelectric effect, the most simple to operate, there is not potential safety hazard.On the premise of not disassembling transformator, not destroying winding, can diagnose quickly and easily.Range is wide.Various Transformer Winding can be differentiated.For the heater size that different transformator phase joint designs is different, by intelligent diagnostics device, all kinds of Transformer Winding can be differentiated.
Description
Technical field
This utility model relates to transformator detection field, particularly a kind of Transformer Winding material intelligent diagnostics device.
Background technology
Along with the fast development of national economy, electricity needs is growing, and the demand of power transformer is increasing.So
And, the prices of raw materials go up in recent years, and copper cash price is unprecedented soaring, and transformer production cost is more and more higher, and by Market Constraint
The selling price of transformator but can not go up with amplitude.Therefore power transformer, in the distribution transformer of especially 10kV rank,
Long-term existence the phenomenon using wire instead of copper wire.The transformator of part producer uses half aluminum manufacture, such as winding be once aluminum,
Secondary is copper, or winding is once aluminum for copper, secondary, and even indivedual producers all use aluminum steel instead and manufacture transformator.Due to copper aluminum
Difference in material characteristic, aluminum winding transformer itself also exists the deficiency in performance.Transformer production number of the enterprise is huge simultaneously
Greatly, many small enterprises not possessing the necessary ability such as quality control and testing inspection unworthily occupy a place among them, its aluminum winding transformation produced
Device quality is difficult to ensure that especially.
The quality problems of Transformer Winding easily cause security incident, use aluminum winding transformer will greatly increase transformation
The risk that device damages, buries potential safety hazard in whole Operation of Electric Systems.Therefore the quality control of Transformer Winding must be strengthened
System, screens out shoddy aluminum winding transformer in power system.
At present, both at home and abroad Transformer Winding wood properly test has been carried out research, and has achieved certain progress.The most direct
Method is to carry out winding destroying sampling, then carries out metallochemistry component analysis, but the manpower of this destructive test and time
Cost is huge, returns electrical network operation maintenance personnel and brings very big inconvenience.Some investigators utilizes DC source to Transformer Winding
Energising, obtains the resistance time curve of winding, then contrasts with its standard curve, but it have ignored the temperature rise shadow to winding resistance
Ring, poor effect.Additionally may utilize x-ray flaw detector and industrial radiographic film distribution transformer winding is taken pictures, by tested
The x-ray attenuation coefficient of Transformer Winding material copper same with scanning thickness curve, the standard curve of aluminum are compared.Due to this
Method can produce radiation, threatens health very big and expensive, onsite application inconvenience.
Therefore, on the premise of not disassembling transformator, not destroying winding, grasp one and can conveniently and effectively diagnose distribution change
The technical method of depressor winding material, has important engineering practical value.
Utility model content
The purpose of this utility model is to propose a kind of Transformer Winding material intelligent diagnostics device；This device solves existing
The method such as destructive test, x-ray inspection is with high costs, operating difficulties, there is the problems such as potential safety hazard, uses based on thermoelectric
The diagnostic method of effect, on the premise of not disassembling transformator, not destroying winding, carries out the diagnosis of transformator material.
The purpose of this utility model is achieved through the following technical solutions:
The Transformer Winding material intelligent diagnostics device that this utility model provides, including PTC heater, temperature sensing
Device, harvester and processor；
Described PTC heater is connected with harvester by relay；Described PTC heater is for transformator phase
Joint conducting rod top heats；Described temperature sensor is for gathering the temperature at transformator phase joint conducting rod top；Institute
State harvester to be connected with processor.
Further, described harvester includes power circuit, temperature sensor circuit, control relay circuit, thermoelectrical potential
Modulate circuit and USB capture card；
Described transformator phase joint is connected with thermoelectrical potential modulate circuit by copper lead-in wire with conducting rod top；Described thermoelectricity
Gesture modulate circuit outfan is connected to USB capture card analog acquisition mouth；Described USB capture card is set up with processor by USB line
Communication connects；Described temperature sensor is connected to input temp sensor by temperature sensor circuit and USB capture card and adopts
The temperature signal of collection；Described power circuit and USB capture card are connected to respectively temperature sensor circuit, Control electricity
Road and thermoelectrical potential modulate circuit provide electric energy.
Further, the thermal source of described PTC heater is 2～4 PTC-ceramic heated at constant temperature sheets, and model selects 220V/
260 DEG C/300W, specification is 56*56*7 millimeter.
Owing to have employed technique scheme, this utility model has the advantage that
The Transformer Winding material intelligent diagnostics device that this utility model provides diagnoses for the existing diagnostic equipment and method
The problems such as speed is slow, diagnosis process is complicated, automatically control data acquisition by Intelligence Diagnosis device, and combine data and carry out
The analyzing and diagnosing of Transformer Winding material, simple to operate, diagnosis speed is fast；This device is transformator material based on pyroelectric effect
Differentiate, the most simple to operate, there is not potential safety hazard.On the premise of not disassembling transformator, not destroying winding, can be the fastest
Diagnose promptly.Range is wide.Various Transformer Winding can be differentiated.For different transformator phase joint designs
All kinds of Transformer Winding can be differentiated by different heater size by intelligent diagnostics device.
This device analyzes program as core with USB capture card, PC and detection based on Labview, it is possible to be automatically performed
Automatically collection, the data computational analysis of heating and temperature control, temperature and thermoelectrical potential, finally realizes Transformer Winding material intelligence and examines
Disconnected.Reduce and measure cost.This utility model apparatus structure is simple, with low cost；Method is easy and simple to handle, facilitates in-site measurement, and
Substantial amounts of human and material resources, financial resources can be saved, work efficiency can be significantly improved, reduce and measure cost, it is simple to popularization and application.
Other advantages of the present utility model, target and feature will be explained to a certain extent in the following description
State, and to a certain extent, will be apparent to those skilled in the art based on to investigating hereafter, or
Person can be instructed from practice of the present utility model.Target of the present utility model and other advantages can be said by following
Bright book realizes and obtains.
Accompanying drawing explanation
Accompanying drawing of the present utility model is described as follows.
Fig. 1 is Transformer Winding material diagnostic equipment structural representation；
Fig. 2 is Transformer Winding material diagnostic equipment transformator scheme of installation；
Fig. 3 is power circuit；
Fig. 4 is control relay circuit；
Fig. 5 is temperature sensor circuit；
Fig. 6 is thermoelectrical potential modulate circuit.
Fig. 7 is Transformer Winding material intelligent diagnosing method.
In figure, 1 be relay, 2 be temperature sensor, 3 be conducting rod, 4 be copper bar, 5 for winding.
Detailed description of the invention
The utility model is described in further detail with embodiment below in conjunction with the accompanying drawings.
Embodiment 1
As it is shown in figure 1, a kind of Transformer Winding material intelligent diagnostics device that the present embodiment provides, add hot charging including PTC
Put, temperature sensor, harvester and processor；
Described PTC heater is connected with harvester by relay；Described PTC heater is for transformator phase
Joint conducting rod top heats；Described temperature sensor is for gathering the temperature at transformator phase joint conducting rod top；Institute
State harvester to be connected with processor.
The processor of the present embodiment uses PC (PC).
The thermal source of the PTC heater of the present embodiment is 2～4 PTC-ceramic heated at constant temperature sheets, and model selects 220V/260
DEG C/300W, specification is 56*56*7 millimeter.The major advantage of PTC-ceramic heated at constant temperature sheet is non electromagnetic principle of heating, will not
Thermoelectrical potential measurement is interfered；Surface insulation, directly can contact with metal, solid heat transfer, and heat transfer efficiency is high；Heating power
Height and automatic constant-temperature, without temperature control, are difficult to produce danger because of overheated.PTC heating module uses power frequency 220V alternating current power supply, maximum
Power is up to 1200W, and during use, PTC heating plate surface temperature is up to 255 DEG C, and heating module body temperature is about 200～250
DEG C, use relay to cut-off heating module power supply, transformator joint temperature can be made to reach 160～220 DEG C.
Described harvester includes power circuit, temperature sensor circuit, control relay circuit, thermoelectrical potential modulate circuit
With USB capture card；
Described transformator phase joint is connected with thermoelectrical potential modulate circuit by copper lead-in wire with conducting rod top；Described thermoelectricity
Gesture modulate circuit outfan is connected to USB capture card analog acquisition mouth；Described USB capture card is set up with processor by USB line
Communication connects；Described temperature sensor is connected to input temp sensor by temperature sensor circuit and USB capture card and adopts
The temperature signal of collection；Described power circuit and USB capture card are connected to respectively temperature sensor circuit, Control electricity
Road and thermoelectrical potential modulate circuit provide electric energy.
The temperature sensor of the present embodiment uses PT100 platinum resistance temperature sensor, the acquisition range of temperature can-
200 DEG C～+300 DEG C, with the transformator one direct contact measurement of phase joint, precision is higher.
Described processor includes that material judge module, described material judge module are carried out in such a way:
S61: by below equation calculating thermoelectrical potential holding voltage:
U=Sab(T1-T2)；
In formula: SabFor the relative Seebeck coefficient between conductor a and conductor b；T1Temperature for contact 1；T2For contact 2
Temperature；
S62: keep voltage to judge Transformer Winding material according to thermoelectrical potential；
S63: if thermoelectrical potential should be not higher than 50 μ V, then Transformer Winding material is copper material；
S64: show and store diagnostic result.
The negative 12V Switching Power Supply as it is shown on figure 3, power supply employing 220V becomes a full member, positive 5V is constituted power circuit by LM2596-5.0
Transferred to 5V by positive 12V, supply the positive and negative 12V needed for whole harvester, positive 5V power supply.
Temperature sensor circuit such as Fig. 4.Three end PT100 platinum resistance constitute electric bridge with R1, R3, R5, and voltage difference is by amplifier
AD623 differential amplification 51 times (feedback resistance R8 decision), amplifier out is connected to USB capture card analog acquisition mouth, by electricity
Pressure value can corresponding platinum resistance value, and then corresponding PT100 phasing meter, obtain measured temperature.
Control relay circuit such as Fig. 5.6N137 high speed photo coupling is isolated, and prevents interference, it is ensured that control relay accurate.
Thermoelectrical potential modulate circuit such as Fig. 6.It is core devices by high speed operation amplifier AD817, constitutes signal follower, letter
Number amplifier, amplifies 1000 times, through RC low-pass filtering.Programme control circut is constituted, by two-way by PGA204 programmable gain amplifier
USB capture card I/O input carries out digital programmable selection, and gain K is 1,10,100,1000 times.
Power circuit, temperature sensor circuit, control relay circuit, thermoelectrical potential modulate circuit are by printed circuit even
Connecing, Aided design is conventional simultaneously the electric source filter circuit connected by printed circuit and low pass signal wave filter, power supply is filtered
Wave circuit can improve power quality, reduces interference, and the effective damp high-frequency of low pass signal wave filter disturbs.
USB capture card uses NI USB 6211 capture card.Its communication connected mode is that USB connects, and has 16 tunnel simulations defeated
Enter to gather, 2 tunnel simulation outputs, 4 road I/O, 16 bit resolutions, maximum sample rate 250kS/s.Can in conjunction with Labview software program,
It is capable of signals collecting control and gathers Data Management Analysis.
PC is set up by USB with USB capture card and is connected, by Labview software and program, it is achieved temperature signal, thermoelectricity
The collection of gesture signal and Transformer Winding material discrimination.
Embodiment 2
The Transformer Winding material intelligent diagnosing method that the present embodiment provides, comprises the following steps:
S1: cut-off relay initialization amplification collection initial thermal electromotive force and be input to processor；
S2: regulate and arrange initial thermal potential range；
Transformator phase joint is heated by S3: closing relay by heater；
S4: gather transformator phase joint temperature signal and be input to processor；
S5: judge whether transformator phase joint temperature is in preset temperature threshold range, if it is, control times magnification
Number gathers thermoelectrical potential and is input to processor；
S6: by below equation calculating thermoelectrical potential holding voltage:
U=Sab(T1-T2)；
In formula: SabFor the relative Seebeck coefficient between conductor a and conductor b；T1Temperature for contact 1；T2For contact 2
Temperature；
S7: keep voltage to judge Transformer Winding material according to thermoelectrical potential and show and storage diagnostic result.
The judgement of described Transformer Winding material is specific as follows:
If thermoelectrical potential should be not higher than 50 μ V, then Transformer Winding material is copper material.
The present embodiment utilizes Transformer Winding material intelligent diagnostics device, is measured by program, and such as Fig. 7, it is concrete
Method step is as follows:
(1) prepare
As in figure 2 it is shown, equipment connects mounting means it is: use the heater of PTC heating plate by screw thread, be arranged on transformation
One of them phase joint conducting rod 3 top of device three phase connection, heater power source connects relay 1, and relay connects harvester
Control relay circuit interface, USB capture card I/O delivery outlet is connected to control circuit and controls end；Pt100 temperature sensor 2 points
It is not arranged at one of them phase joint described and 0 phase joint conducting rod 3 top, is connected to harvester temperature sensor circuit
Interface, temperature sensor circuit output is connected to USB capture card analog acquisition mouth；Conducting rod is connected with winding 5 by copper bar 4；
One of them phase joint described and 0 phase joint conducting rod top are connected with thermoelectrical potential modulate circuit by copper lead-in wire, and thermoelectrical potential is adjusted
Reason circuit output is connected to USB capture card analog acquisition mouth；USB capture card is set up communication by USB line with PC and is connected.
(2) initialize
After (1st) step completes, connect harvester and heater power supply, carry out following initially setting by Automatic Program
Put:
Programme-control relay cut-offs；
Programme-control, initializing programming amplifying multiple is 1；
2. open the temperature acquisition passage of data collecting card, gather initial thermal electromotive force, and return to zero；
(3) temperature controls
After (2nd) step completes, by programme-control, closing relay, begin to warm up, open data collecting card temperature acquisition
Passage, gathers when one of them phase joint temperature signal described, is transferred to PC, program calculates relevant temperature, if higher than 200
DEG C, control relay and cut-off, cut off heater power supply, stop heating；When one of them phase connector temperature described is less than 160
DEG C, programme-control relay closes, and continues heating, constitutes closed feedback, holding phase joint temperature stabilization and 160 DEG C～200 DEG C.
(4) data acquisition
After (3rd) step completes, opening usb data capture card thermoelectrical potential acquisition channel, capture card two-way I/O is defeated in programme-control
Going out, automatically adjust the amplification of programmable amplifier, the signal amplitude scope making input thermoelectrical potential simulation mouth is 1V～10V, with
Improve accuracy of measurement；At a certain time interval, gathering many group thermoelectrical potential data and corresponding temperature data, data are adopted by USB
Truck is transferred to PC, and generates log file, is stored in PC；Collection completes, and programme-control disconnects relay, stops heating.
(5) data calculate, analyze
After (4th) step completes, the PC end program thermoelectrical potential to collecting and corresponding temperature one secondary data process, and calculate
Go out corresponding true thermoelectrical potential and corresponding temperature.On the basis of simulation analysis and experimental verification, it is considered to certain nargin, if working as
In the case of temperature difference is metastable, takes thermoelectrical potential when Transformer Winding material is copper material and should be not higher than 50 μ V.If therefore thermoelectricity
Gesture value within a certain period of time, remains U≤50 μ V, then be copper winding transformer, is otherwise non-copper winding transformer.
(6) result shows and stores
After (5th) step completes, by directly displaying Transformer Winding material diagnosis knot on Labview programme-control panel
Really.And diagnostic result, data are stored in PC with document form data, for calling at any time and show later.
The present embodiment is transformator material based on Seebeck effect diagnosis, by analyzing the mistake of transformator pyroelectric effect
Journey, derives total thermoelectrical potential and the relational expression of winding material of winding loop, calculates, in conjunction with practical situation, the heat that copper becomes and aluminum becomes
Potential difference, considers further that certain nargin, determines judgment threshold Um；Based on Labview software development procedures, combined with hardware, reality
Automatically collection, the data computational analysis of existing heating and temperature control, temperature and thermoelectrical potential, finally realizes Transformer Winding material intelligence
Diagnosis, diagnostic result shows and stores.
The basic physical principle of discrimination method is Seebeck (Seebeck) effect, and the also referred to as first pyroelectric effect, it refers to
The pyroelectric phenomena of the voltage difference between two kinds of materials are caused due to two kinds of different electric conductors or the temperature contrast of quasiconductor.For by
The loop that two kinds of different conductors are composed in series, does not consider the Seebeck effect thermoelectricity in the case of Seebeck coefficient variation with temperature
Gesture computing formula is:
U=Sab(T1-T2)；
In formula: Sab is the relative Seebeck coefficient between conductor a and conductor b；T1 is the temperature of contact 1；T2 is contact 2
Temperature.
Between material conductor the most of the same race, even if there is temperature contrast, thermoelectrical potential also will not be produced.But it is real in engineering
In border, although be all copper material, owing to purity is incomplete same, impurities composition is different, and its Seebeck coefficient also has slightly
Elementary errors is different.Relative Seebeck coefficient between laboratory measurement, different copper materials is minimum, is generally not more than 1 μ V/K.
Copper material and aluminium are dissimilar metal, in the case of having temperature contrast, it may occur that significantly pyroelectric effect.Experiment
Enamel covered wire and enamel insulated aluminium wire sample that room employing Transformer Winding is conventional measure, and record enamel covered wire and enamel-cover under room temperature
The relative Seebeck coefficient of aluminum steel is 4.1576 μ V/K.
The conductor that transformator pyroelectric effect is measured in loop has outside lead, conducting rod, copper bar, winding four kinds.Outside is drawn
Line uses copper material wire, and conducting rod and copper bar are known as copper material, and winding material is unknown.
When Transformer Winding material is copper material, whole pyroelectric effect is measured loop and is conductive material of the same race.Therefore, base
In aforementioned theory analysis, Transformer Winding loop will not produce obvious pyroelectric effect, and thermoelectrical potential should level off to zero.In emulation
Analyze and on the basis of experimental verification, it is considered to certain nargin, taking thermoelectrical potential when Transformer Winding material is copper material should be not higher than
50μV。
When Transformer Winding material is aluminium, winding material is with other conductive material in pyroelectric effect measurement loop not
With, obvious pyroelectric effect can be produced.After heating, owing to aluminium winding two ends temperature is different, can produce necessarily at winding two ends
Thermoelectrical potential.Take copper aluminum to calculate relative to Seebeck coefficient 4.1576 μ V/K, when the winding two ends temperature difference reaches 12.5 DEG C, heat
Electromotive force i.e. can be more than 50 μ V.Carrying out simulation analysis and experimental verification, the mode of heating that this utility model uses can make to join completely
The piezoelectric transformer winding two ends temperature difference, more than 15 DEG C, reaches to differentiate requirement.
Finally illustrating, above example is only in order to illustrate the technical solution of the utility model and unrestricted, although ginseng
According to preferred embodiment, this utility model is described in detail, it will be understood by those within the art that, can be to this
The technical scheme of utility model is modified or equivalent, and without deviating from objective and the scope of the technical program, it all should
Contain in the middle of right of the present utility model.
Claims (3)
1. a Transformer Winding material intelligent diagnostics device, it is characterised in that: include PTC heater, temperature sensor, adopt
Acquisition means and processor；
Described PTC heater is connected with harvester by relay；Described PTC heater is for transformator phase joint
Conducting rod top heats；Described temperature sensor is for gathering the temperature at transformator phase joint conducting rod top；Described adopt
Acquisition means is connected with processor.
2. Transformer Winding material intelligent diagnostics device as claimed in claim 1, it is characterised in that: described harvester includes
Power circuit, temperature sensor circuit, control relay circuit, thermoelectrical potential modulate circuit and USB capture card；
Described transformator phase joint is connected with thermoelectrical potential modulate circuit by copper lead-in wire with conducting rod top；Described thermoelectrical potential is adjusted
Reason circuit output end is connected to USB capture card analog acquisition mouth；Described USB capture card sets up communication by USB line and processor
Connect；Described temperature sensor is connected to input temp sensor acquisition by temperature sensor circuit and USB capture card
Temperature signal；Described power circuit and USB capture card be connected to respectively temperature sensor circuit, control relay circuit and
Thermoelectrical potential modulate circuit provides electric energy.
3. Transformer Winding material intelligent diagnostics device as claimed in claim 1, it is characterised in that: described PTC heater
Thermal source be 2～4 PTC-ceramic heated at constant temperature sheets, model select 220V/260 DEG C/300W, specification is 56*56*7 millimeter.
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| CN201620701836.9U CN205808974U (en) | 2016-07-05 | 2016-07-05 | A kind of Transformer Winding material intelligent diagnostics device |
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| CN201620701836.9U CN205808974U (en) | 2016-07-05 | 2016-07-05 | A kind of Transformer Winding material intelligent diagnostics device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105973934A (en) * | 2016-07-05 | 2016-09-28 | 国网重庆市电力公司电力科学研究院 | Intelligent diagnosis device and method for transformer winding material |
| CN108169275A (en) * | 2018-03-09 | 2018-06-15 | 广州供电局有限公司 | A kind of reactance coil material thermoelectricity Curves Recognition method |
| CN108398458A (en) * | 2018-03-09 | 2018-08-14 | 广州供电局有限公司 | A kind of distribution transformer yn connections winding material thermoelectricity Curves Recognition method |
| CN108414568A (en) * | 2018-03-09 | 2018-08-17 | 广州供电局有限公司 | A kind of distribution transformer D/Y connections winding material thermoelectricity Curves Recognition method |
-
2016
- 2016-07-05 CN CN201620701836.9U patent/CN205808974U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105973934A (en) * | 2016-07-05 | 2016-09-28 | 国网重庆市电力公司电力科学研究院 | Intelligent diagnosis device and method for transformer winding material |
| CN108169275A (en) * | 2018-03-09 | 2018-06-15 | 广州供电局有限公司 | A kind of reactance coil material thermoelectricity Curves Recognition method |
| CN108398458A (en) * | 2018-03-09 | 2018-08-14 | 广州供电局有限公司 | A kind of distribution transformer yn connections winding material thermoelectricity Curves Recognition method |
| CN108414568A (en) * | 2018-03-09 | 2018-08-17 | 广州供电局有限公司 | A kind of distribution transformer D/Y connections winding material thermoelectricity Curves Recognition method |
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