CN108593706A - A kind of both ends heating distribution transformer winding material nondestructive detection system - Google Patents
A kind of both ends heating distribution transformer winding material nondestructive detection system Download PDFInfo
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- CN108593706A CN108593706A CN201810482182.9A CN201810482182A CN108593706A CN 108593706 A CN108593706 A CN 108593706A CN 201810482182 A CN201810482182 A CN 201810482182A CN 108593706 A CN108593706 A CN 108593706A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
Abstract
The invention discloses a kind of both ends to heat distribution transformer winding material nondestructive detection system, it includes：Detection device, the first conducting rod, the second conducting rod and winding to be measured, detection device are connect with the first conducting rod and the second conducting rod respectively by gathering line；The first heating module is provided on first conducting rod；The second heating module is provided on second conducting rod；Heating port, the first heating module and the second heating module is additionally provided in detection device to connect with heating port by heater wire；Winding both ends to be measured are connect by the first copper bar connecting line, the second copper bar connecting line with the first conducting rod and the second conducting rod respectively.The advantageous effect that the present invention obtains is：By being heated simultaneously at winding both ends, and keep heating temperature identical, evaded thermoelectrical potential when thermoelectrical potential measures measure at line (wire clamp) caused by thermoelectrical potential error, in the case where not damaging distribution transformer winding, it is copper or aluminium accurately to tell winding material.
Description
Technical field
The present invention relates to distribution transformer technical field, especially a kind of both ends heating distribution transformer winding material is lossless
Detecting system.
Background technology
Distribution transformer does winding using copper material, is the requirement of company of Utilities Electric Co. and many power consumers, but some
Evil mind businessman does not stint the transformer manufactured with aluminium winding to utmostly pursue interests, is substituted the bad for the good with this.This kind of " aluminium is for copper " becomes
Depressor make power consumer according to pure copper wire price buy be personation aluminum winding transformer, economically also suffered damage
It loses.On the other hand, the aluminum winding transformer quality of this producer's production is also difficult to ensure, brings security risk.
In recent years when being inspected by random samples for distribution transformer it has also been found that there is the presence of aluminium winding distribution transformer, but at present
Equipment management department there is no a kind of simple and fast means to judge the material of distribution transformer, be by hanging cover or destruction mostly
The mode of winding identifies the material of winding, and irreversible damage is caused to distribution transformer.Therefore, research one kind conscientiously may be used
Capable transformer winding material discrimination method, has important practical significance and engineering value.
Currently, non-destructive testing of the research to dry-type distribution transformer winding material both at home and abroad, mainly by the following aspects：
First is taken pictures to transformer winding progress x-ray inspection and industrial radiographic film, by the result of shooting with normal
Copper winding transformer is compared, and then still this test method is of high cost for the material of confirmation winding, big to human body radiation, existing
Field is inconvenient to use；
Second of detection method is one resistance curve of time for measuring distribution transformer winding under fixed current, then is distinguished
It is compared with one resistance curve of time of one resistance curve of time of copper and aluminium, specifically refers to that application No. is 200810158124.7
It is entitled《Conductive wire material test instrument for transformer winding and its test method》Chinese invention patent, but this detection method is existing
Accuracy is relatively low when field uses, and is interfered by factors such as winding material, thicknesses larger；
The third method is the transformer winding material non-destructive testing based on thermoelectrical potential, and this method reliability is high, specifically may be used
Application reference number is 201620701836.9 entitled《A kind of transformer winding material intelligent diagnostics device》China it is practical new
Type patent, this method theoretical research is accurately reliable, but in actual application after the heating of discovery winding end, end copper bar is with warm
Also it will produce certain thermoelectrical potential between potential measurement wire clamp, cause the patent that can not accurately measure the thermoelectricity of winding junction
Gesture.
Based on the above issues, the present invention is based on thermoelectric principles, propose a kind of both ends heating distribution transformer winding material without
Detecting system is damaged, the deficiency application No. is 201620701836.9 can be effectively solved.
Invention content
In view of the drawbacks described above of the prior art, it is an object of the invention to provide a kind of both ends heating distribution transformer around
Group material nondestructive detection system by being heated simultaneously at winding both ends, and keeps heating temperature identical, has evaded thermoelectrical potential measurement
When thermoelectrical potential measure at line (wire clamp) caused by thermoelectrical potential error, can be accurate in the case where not damaging distribution transformer winding
Really tell winding material.
It is realized the purpose of the present invention is technical solution in this way, a kind of both ends heating distribution transformer winding material
Nondestructive detection system, it includes：
Detection device, the first conducting rod, the second conducting rod and winding to be measured, it is characterised in that：The detection device passes through
Gathering line respectively on transformer the first conducting rod and the second conducting rod connect；
It is provided with the first heating module on first conducting rod；It is provided with the second heated mould on second conducting rod
Block；
Heating port is additionally provided in the detection device, first heating module and the second heating module pass through heating
Line is connect with the heating port；
It is led respectively with the first conducting rod and second by the first copper bar connecting line, the second copper bar connecting line at winding both ends to be measured
Electric pole connects.
Further, the detection device includes：Processor, temperature collecting module, thermoelectrical potential acquisition module, computer heating control
Module and material analysis module；
Temperature collecting module acquires the temperature value of the first conducting rod and the second conducting rod respectively, and is labeled as T1, T2；Temperature
Collected temperature is transferred to processor by acquisition module, and processor is sent out according to the temperature Value Data of receiving to heating control module
Send control instruction；
Thermoelectrical potential acquisition module acquires the thermoelectrical potential of transformer, and collected thermoelectrical potential is transmitted to processor, handles
Device carries out the judgement of winding material by material analysis module is transmitted to after the thermoelectrical potential Data Analysis Services received.
Further, the heating control module heating process is as follows：
S1：It is T that processor, which presets heating temperature,；
S2：It is preset with temperature measuring point respectively at the first conducting rod and the second conducting rod, processor is to computer heating control mould
Block sends heating instructions；
S3：Heating control module controls the first heating module and the second heating module respectively leads the first conducting rod and second
Electric pole is heated；
S4：Whether the temperature for detecting temperature measuring point is T+2 DEG C；If so, heating stops, conversely, continuing to heat；
S5：Whether the temperature for detecting temperature measuring point is less than T-2 DEG C, if so, continuing to heat, conversely, stopping heating.
Further, further include having：
S6：After step S4 or S5 heating 15min, measurement thermoelectrical potential is proceeded by；
S7：Material analysis module carries out material judgement according to the thermoelectrical potential data of measurement.
Further, it is provided with the first heating plate in first heating module, is provided in second heating module
Two heating plates.
Further, the gathering line includes the first Thermocouple Circuit and the second Thermocouple Circuit；
First Thermocouple Circuit is connect with the first conducting rod and detection device respectively；
Second Thermocouple Circuit is connect with the second conducting rod and detection device respectively；
Thermocouple Circuit is made of copper wire and constantan.
Further, aviation plug, first Thermocouple Circuit and the second thermocouple are additionally provided in the detection device
Circuit is connect by aviation plug with the detection device.
Further, the transformer can be oil immersion-type distribution transformer or dry-type distribution transformer.
Further, first conducting rod and the second conducting rod can be copper bar, and not be aluminium conducting rod.
By adopting the above-described technical solution, the present invention has the advantage that：
(1) the method for the present invention can quick and precisely measure winding and high-temperature electric conduction bar (or copper bar) contact place after heating
The thermoelectrical potential of generation.
(2) accuracy measured is improved, copper bar material is different and produce after excluding thermoelectrical potential gathering line (or clip) and heating
The interference of heat potential.
(3) present invention is applicable not only to dry-type transformer, is also applied for oil-immersed transformer, and avoid it is right in test process
The destruction of transformer winding, test method are simpler and more direct.
(4) present invention is applicable not only to the low pressure winding of distribution transformer, is also applied for the high-voltage winding of distribution transformer.
Other advantages, target and the feature of the present invention will be illustrated in the following description to a certain extent, and
And to a certain extent, based on will be apparent to those skilled in the art to investigating hereafter, Huo Zheke
To be instructed from the practice of the present invention.
Description of the drawings
The description of the drawings of the present invention is as follows：
Fig. 1 is the connection diagram that distribution transformer winding material nondestructive detection system is heated at both ends.
Fig. 2 is the local connection diagram that distribution transformer winding material nondestructive detection system is heated at both ends.
Fig. 3 is the inside connection diagram of detection device.
Fig. 4 is the workflow schematic diagram of detection device.
Fig. 5 is the flow diagram that distribution transformer winding material lossless detection method is heated at both ends.
In figure, 1 is detection device；2 measure line for the first thermoelectrical potential, and 3 be the first conducting rod, and 4 be the second conducting rod, and 5 are
First heating module, 6 be the second heating module, and 7 be the contact of winding to be measured and the first conducting rod 3, and 8 be winding to be measured, and 9 be to wait for
The contact of winding and the second conducting rod 4 is surveyed, 10 be the first copper bar connecting line, and 11 be the second copper bar connecting line, and 12 be the second thermoelectricity
Gesture measures line, and 13 measure line for second temperature, and 14 be heater wire, and 15 be heating port, and 16 measure line for second temperature, and 17 be boat
Blind plug, 18 be temperature measuring point.
Specific implementation mode
The invention will be further described with reference to the accompanying drawings and examples.
Embodiment：As shown in Figures 1 to 4；A kind of both ends heating distribution transformer winding material nondestructive detection system, it is wrapped
It has included：
Detection device 1, the first conducting rod 3, the second conducting rod 4 and winding to be measured 8, it is characterised in that：Detection device 1 passes through
Gathering line is connect with the first conducting rod 3 and the second conducting rod 4 respectively；
The first heating module 5 is provided on first conducting rod 3；The second heating module 6 is provided on second conducting rod 4；
Heating port 15 is additionally provided in detection device 1, the first heating module 5 and the second heating module 6 pass through heater wire
14 connect with heating port 15；
8 both ends of winding to be measured respectively by the first copper bar connecting line 10, the second copper bar connecting line 11 and the first conducting rod 3 and
Second conducting rod 4 connects.
Detection device 1 includes：Processor, temperature collecting module, thermoelectrical potential acquisition module, heating control module and material
Analysis module；
Temperature collecting module acquires the temperature value of the first conducting rod 3 and the second conducting rod 4 respectively, and is labeled as T1, T2；Temperature
Collected temperature is transferred to processor by degree acquisition module, and processor is according to the temperature Value Data of receiving to heating control module
Send control instruction；
Thermoelectrical potential acquisition module acquires the thermoelectrical potential of transformer, and collected thermoelectrical potential is transmitted to processor, handles
Device carries out the judgement of winding material by material analysis module is transmitted to after the thermoelectrical potential Data Analysis Services received.
Heating control module heating process is as follows：
S1：It is T that processor, which presets heating temperature,；
S2：It is preset with temperature measuring point respectively at the first conducting rod 3 and the second conducting rod 4, processor is to computer heating control
Module sends heating instructions；
S3：Heating control module controls the first heating module 5 and the second heating module 6 respectively to the first conducting rod 3 and the
Two conducting rods 4 are heated；It is provided with the first heating plate in first heating module 5, second is provided in the second heating module 6 and is added
Backing.Conducting rod is heated by heating plate.
S4：Whether the temperature for detecting temperature measuring point is T+2 DEG C；If so, heating stops, conversely, continuing to heat；
S5：Whether the temperature for detecting temperature measuring point is less than T-2 DEG C, if so, continuing to heat, conversely, stopping heating.
S6：After step S4 or S5 heating 15min, measurement thermoelectrical potential is proceeded by；
S7：Material analysis module carries out material judgement according to the thermoelectrical potential data of measurement.
Wherein, be that detection device 1 powers is 220V AC powers, detection device 1 first set after being switched on heating temperature as
T.The setting of T can be set as 100 DEG C depending on the class of insulation of transformer, in the present embodiment.When beginning to warm up, detection device
1 pair of two heating module is separately controlled, and according to temperature value at T1, T2 on conducting rod (or copper bar), determines two heated moulds
Whether block will heat.
When temperature on conducting rod (or copper bar) at temperature measuring point is heated to T+2 DEG C by heating module, i.e., at 102 DEG C,
Heating stops.When temperature is less than T-2 DEG C at temperature measuring point, i.e., at 98 DEG C, heating module continues to heat.I.e. so that measurement point
Temperature at T1, T2 is stablized the temperature in T ± 2 DEG C, the present embodiment and is stablized between 98 DEG C to 102 DEG C.When two measurement points
Locate temperature to stablize at T ± 2 DEG C, be further continued for heating 15min, heat is conducted along conducting rod to conducting rod (or copper bar) at this time
At contact 7 between winding, thermoelectrical potential measurement can be opened, measurement is finished carries out material judgement according to measured value.
Detection device 1 of the present invention consists of the following components：Processor, thermoelectrical potential acquisition module, adds temperature collecting module
Thermal control module and material analysis module.Temperature collecting module mainly to T1, T2 on winding both ends conducting rod (or copper bar) at
Temperature is acquired, and transfers data to processor, and two heating are controlled respectively by heating control module by processor
The heating of module finally makes the temperature at temperature acquisition point T1, T2 be maintained at T ± 2 DEG C.Thermoelectrical potential acquires mould after keeping 15min
BOB(beginning of block) carries out thermoelectrical potential acquisition, and carries out material differentiation according to the value measured.
Gathering line includes the first Thermocouple Circuit and the second Thermocouple Circuit；
First Thermocouple Circuit is connect with the first conducting rod 3 and detection device 1 respectively；
Second Thermocouple Circuit is connect with the second conducting rod 4 and detection device 1 respectively；
First Thermocouple Circuit measures line 2 by the first thermoelectrical potential and the first temperature measuring line 16 is constituted, and the second thermocouple returns
It route the second thermoelectrical potential and measures line 12 and the second temperature measurement composition of line 13.Wherein, it is copper wire that thermoelectrical potential, which measures line, and temperature measures
Line asks constantan.
The measurement of thermoelectrical potential is carried out by the copper wire in two groups of temperature thermocouples, and copper wire and constantan constitute one group of thermocouple,
Temperature on conducting rod after heating (or copper bar) can be tested.In two groups of thermocouples, using two copper wire therein
Thermoelectrical potential acquisition circuit is formed, the thermoelectrical potential generated to winding after heating and junction measures.Using this measurement method,
Reduce wiring so that it is more convenient to measure.But since the temperature on two conducting rods (or copper bar) will not be absolutely consistent,
Therefore can still have temperature difference between the conducting rod (or copper bar) after measuring copper wire and heating, most 4 DEG C, and unlike material
The thermoelectrical potential of about 1 μ V/k is will produce between copper, therefore this measuring device also will produce the error of about 4 μ V, because of error amount
It is smaller, it is possible to ignore.
Aviation plug 17 is additionally provided in detection device 1, the first Thermocouple Circuit and the second Thermocouple Circuit pass through aviation
Plug 17 is connect with detection device 1.
Distribution transformer in the present invention can be oil immersion-type distribution transformer or dry-type distribution transformer.
First conducting rod 3 and the second conducting rod 4 can be copper bar, and not be aluminium conducting rod.
As shown in figure 5, distribution transformer winding material lossless detection method is heated at a kind of both ends, it includes：
S01：Winding 8 to be measured is passed through into the first copper bar connecting line 10 and the second copper bar connecting line 11 and the first conducting rod respectively
3 and second conducting rod 4 connect；
S02：The first heating module 5 and the second heated mould are fixedly installed respectively on the first conducting rod 3 and the second conducting rod 4
Block 6；
S03：The heating for controlling the first heating module 5 and the second heating module 6 makes the first conducting rod 3 and the second conducting rod 4
It is heated consistent；
S04：Thermoelectrical potential measuring instrument 1 measures line 2 by the first thermoelectrical potential respectively and the second thermoelectrical potential measures line 12 and first
The connection of conducting rod 3 and the second conducting rod 4 and the thermoelectrical potential Ev for acquiring entire distribution transformer；In the present embodiment, thermoelectrical potential is surveyed
It measures instrument 1 and uses microvoltmeter.First thermoelectrical potential measures line 2 and the second thermoelectrical potential measures line 12 and can be pressed from both sides to measure.
S05：The thermoelectrical potential Ev acquired according to thermoelectrical potential measuring instrument 1 is detected judgement to the material of winding to be measured.
The first heating module 5 and the second heating module 6 are separately fixed at the first conducting rod of winding 8 to be measured in test process
On (or copper bar) 3 and the second conducting rod (or copper bar) 4, and the heating of two heating modules 5 and 6 is controlled, the first thermoelectrical potential is made to survey
Measure line 2, the second thermoelectrical potential measures line 12 and the contact site temperature of two conducting rods (or copper bar) 3,4 is almost the same.
Through heating after a period of time, heat along conducting rod (or copper bar) 3,4 to winding 8 to be measured conduct, finally due to
8 both ends the first copper bar connecting line 10 of winding to be measured is different with 11 length of the second copper bar connecting line, and makes winding and conducting rod to be measured
Temperature T at two nodes 7,9 of (or copper bar)3、T4Difference, the thermoelectrical potential Ev that thermoelectrical potential tester 1 acquires at this time is thermoelectricity
Gesture measures the algebraical sum of the thermoelectrical potential generated between the thermoelectrical potential generated and copper bar and winding to be measured between line and copper bar.
Step S05's further includes having：
S051：According to the middle conductor law and medium temperature law of thermocouple, thermoelectrical potential Ev is decomposed as follows：
Ev=E (first measures line, the first conducting rod)(T1, T0)+ E (the first copper bar connecting line, winding to be measured)(T4, T0)+ E (is waited for
Survey winding, the second copper bar connecting line)(T3, T0)+ E (the second conducting rod, second measures line)(T2, T0)；
Wherein, E (first measures line, the first conducting rod)(T1, T0)It indicates to be T1 in hot-side temperature, when cold junction temperature is T0,
First thermoelectrical potential measures generated thermoelectrical potential between line and the first conducting rod；
E (the second conducting rod, second measures line)(T2, T0)It indicates to be T2 in hot-side temperature, when cold junction temperature is T0, second leads
Electric pole and the second thermoelectrical potential measure generated thermoelectrical potential between line；
E (winding to be measured, the second copper bar connecting line)(T3, T0)It indicates to be T3 in hot-side temperature, it is to be measured when cold junction temperature is T0
Generated thermoelectrical potential between winding and the second copper bar connecting line；
E (the first copper bar connecting line, winding to be measured)(T4, T0)It indicates to be T4 in hot-side temperature, when cold junction temperature is T0, first
Generated thermoelectrical potential between copper bar connecting line and winding to be measured；
S052：Judge the relationship of temperature T1 and T2；As temperature T1=T2, (first measures line to E, and first is conductive
Bar)(T1, T0)+ E (the second conducting rod, second measures line)(T2, T0)=0；
At this time：
Ev=E (the first copper bar connecting line, winding to be measured)(T4, T0)+ E (winding to be measured, the second copper bar connecting line)(T3, T0)；
S053：Calculate the Seebeck coefficient of winding 8 and first conducting rod 3 and the second conducting rod 4 to be measured after thermoelectrical potential is decomposed；
If Seebeck coefficient is about 0.5 μ V/k, winding to be measured is copper material winding；If Seebeck coefficient is not less than 4 μ V/k, to be measured
Winding is aluminium material winding.
When copper bar connecting line (i.e. connecting line is copper, and winding is aluminium) different with winding material to be measured, (the first copper bar connects E
Wiring, winding to be measured)(T4, T0)With E (winding to be measured, the second copper bar connecting line)(T3, T0)Seebeck coefficient numerical value it is larger, greatly
It is generally 4 μ V/K.Thermoelectrical potential measures line and winding because being all copper material, causes the thermoelectrical potential generated smaller, at this time Seebeck coefficient
Numerical value be less than 1 μ V/K.The thermoelectrical potential Ev that thermoelectrical potential tester 1 acquires at this time is mainly (T3 between winding and copper bar connecting line
With the positions T4) caused by thermoelectrical potential.
It is produced after the heating with connecting line 10,11 that the present invention can accurately measure winding 8 and copper bar (or conducting rod) 3,4
Thermoelectrical potential：Measuring between different copper materials has relatively small Seebeck coefficient, about 0.5 μ V/k, and the plug between copper aluminium material material
Seebeck coefficient is not less than 4 μ V/k.
The judgement of step S05 further includes having；
S0501：First conducting rod 3 and the second conducting rod 4 are heated to 130 DEG C, conducted at this time to the temperature of joint to be measured
Degree is more than 30 DEG C；
S0502：Thermoelectrical potential measuring instrument 1 starts to acquire thermoelectrical potential Ev, if the thermoelectrical potential Ev of acquisition is less than 30 μ V, it is to be measured around
Group is copper material winding；If the thermoelectrical potential Ev of acquisition is more than 120 μ V, winding to be measured is aluminium material winding；If the thermoelectricity of acquisition
Gesture Ev be 30 μ V between 120 μ V when, then winding to be measured is that aluminium material winding probability is：It waits for
It is that copper material winding probability is to survey winding：
First conducting rod 3 and the second conducting rod 4 can be copper bar, and not be that aluminium conducting rod or aluminium are arranged；Because between aluminium and aluminium
There is no copper bar to be used as with reference to measurement.
The present invention is when in use it is noted that the following：
(1) winding both ends conducting rod (or copper bar) should ensure that two thermoelectrical potentials measure the temperature at wire clamp during heating
Of substantially equal, the temperature difference is no more than 5 DEG C.
(2) length of winding both ends conducting rod (or copper bar) or connecting line should differ, and make after heating, winding both ends
The temperature of two junctions is different, there is certain temperature difference.
(3) the method for the present invention is suitable for the low pressure side and high pressure side of oil immersion-type distribution transformer, and matches suitable for dry type
The low-pressure side of piezoelectric transformer, but winding both ends conducting wire, adjunction two should be removed in the high-pressure side use of dry-type distribution transformer
The different copper bar of length.
The present invention is based on thermoelectric principles, by transformer winding both ends conducting rod (or copper bar) while heating and holding two
Thermoelectrical potential measurement wire clamp spot temperature is consistent, and both ends thermoelectrical potential measures between line and conducting rod (or copper bar) because material difference generates
Thermoelectrical potential will offset each other, according to the thermoelectrical potential for measuring winding both ends after heating, (or the copper of winding and conducting rod after as heating
Row) thermoelectrical potential caused by joint, and then judge winding material.
It should be understood that the part that this specification does not elaborate belongs to the prior art.Finally illustrate, it is above
Embodiment is merely illustrative of the technical solution of the present invention and unrestricted, although having been carried out in detail to the present invention with reference to preferred embodiment
Illustrate, it will be understood by those of ordinary skill in the art that, technical scheme of the present invention can be modified or replaced equivalently,
Without departing from the objective and range of the technical program, it is intended to be within the scope of the claims of the invention.
Claims (9)
- Include detection device (1), the first conducting rod 1. distribution transformer winding material nondestructive detection system is heated at a kind of both ends (3), the second conducting rod (4) and winding to be measured (8), it is characterised in that：The detection device (1) by gathering line respectively with transformation The first conducting rod (3) on device and the second conducting rod (4) connection；It is provided with the first heating module (5) on first conducting rod (3)；Second is provided on second conducting rod (4) to add Thermal modules (6)；Heating port (15), first heating module (5) and the second heating module are additionally provided on the detection device (1) (6) it is connect with the heating port (15) by heater wire (14)；Winding (8) both ends to be measured pass through the first copper bar connecting line (10), the second copper bar connecting line (11) and the first conducting rod respectively (3) it is connected with the second conducting rod (4).
- 2. distribution transformer winding material nondestructive detection system is heated at both ends as described in claim 1, which is characterized in that described Detection device (1) includes：Processor, temperature collecting module, thermoelectrical potential acquisition module, heating control module and material analysis mould Block；Temperature collecting module acquires the temperature value of the first conducting rod (3) and the second conducting rod (4) respectively, and is labeled as T1, T2；Temperature Collected temperature is transferred to processor by degree acquisition module, and processor is according to the temperature Value Data of receiving to heating control module Send control instruction；Thermoelectrical potential acquisition module acquires the thermoelectrical potential of transformer, and collected thermoelectrical potential is transmitted to processor, and processor will The judgement that material analysis module carries out winding material is transmitted to after the thermoelectrical potential Data Analysis Services received.
- 3. distribution transformer winding material nondestructive detection system is heated at both ends as claimed in claim 2, which is characterized in that described Heating control module heating process is as follows：S1：It is T that processor, which presets heating temperature,；S2：It is preset with temperature measuring point respectively at the first conducting rod (3) and the second conducting rod (4), processor is to computer heating control Module sends heating instructions；S3：Heating control module control the first heating module (5) and the second heating module (6) respectively to the first conducting rod (3) and Second conducting rod (4) is heated；S4：Whether the temperature for detecting temperature measuring point is T+2 DEG C；If so, heating stops, conversely, continuing to heat；S5：Whether the temperature for detecting temperature measuring point is less than T-2 DEG C, if so, continuing to heat, conversely, stopping heating.
- 4. distribution transformer winding material nondestructive detection system is heated at both ends as claimed in claim 3, which is characterized in that also wrap It has included：S6：After step S4 or S5 heating 15min, measurement thermoelectrical potential is proceeded by；S7：Material analysis module carries out material judgement according to the thermoelectrical potential data of measurement.
- 5. distribution transformer winding material nondestructive detection system is heated at both ends as described in claim 1, which is characterized in that described It is provided with the first heating plate in first heating module (5), the second heating plate is provided in second heating module (6).
- 6. distribution transformer winding material nondestructive detection system is heated at both ends as described in claim 1, which is characterized in that described Gathering line includes the first Thermocouple Circuit and the second Thermocouple Circuit；First Thermocouple Circuit is connect with the first conducting rod (3) and detection device (1) respectively；Second Thermocouple Circuit is connect with the second conducting rod (4) and detection device (1) respectively；Thermocouple Circuit is made of copper wire and constantan.
- 7. distribution transformer winding material nondestructive detection system is heated at both ends as claimed in claim 6, which is characterized in that described Aviation plug (17) is additionally provided in detection device (1), first Thermocouple Circuit and the second Thermocouple Circuit pass through aviation Plug (17) is connect with the detection device (1).
- 8. distribution transformer winding material nondestructive detection system is heated at both ends as claimed in claim 2, which is characterized in that described Transformer can be oil immersion-type distribution transformer or dry-type distribution transformer.
- 9. distribution transformer winding material nondestructive detection system is heated at both ends as described in claim 1, which is characterized in that described First conducting rod (3) can be copper bar with the second conducting rod (4), and not be aluminium conducting rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810482182.9A CN108593706B (en) | 2018-05-18 | 2018-05-18 | Nondestructive testing system for material of winding of distribution transformer with two-end heating |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810482182.9A CN108593706B (en) | 2018-05-18 | 2018-05-18 | Nondestructive testing system for material of winding of distribution transformer with two-end heating |
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| CN108593706A true CN108593706A (en) | 2018-09-28 |
| CN108593706B CN108593706B (en) | 2020-11-10 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108982579A (en) * | 2018-05-18 | 2018-12-11 | 国网重庆市电力公司电力科学研究院 | A kind of oil immersion-type distribution transformer winding material non-destructive testing test clip |
| CN113884778A (en) * | 2021-10-29 | 2022-01-04 | 浙江华电器材检测研究院有限公司 | Transformer winding parameter identification method based on high-frequency excitation |
| CN115598166A (en) * | 2022-10-09 | 2023-01-13 | 国网山东省电力公司临沂供电公司（Cn） | Rapid nondestructive transformer coil material detection method |
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