CN108398458A - A kind of distribution transformer yn connections winding material thermoelectricity Curves Recognition method - Google Patents
A kind of distribution transformer yn connections winding material thermoelectricity Curves Recognition method Download PDFInfo
- Publication number
- CN108398458A CN108398458A CN201810193464.7A CN201810193464A CN108398458A CN 108398458 A CN108398458 A CN 108398458A CN 201810193464 A CN201810193464 A CN 201810193464A CN 108398458 A CN108398458 A CN 108398458A
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- Prior art keywords
- winding
- data acquisition
- integrated apparatus
- winding material
- distribution transformer
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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
- G01N25/72—Investigating presence of flaws
Abstract
The present invention relates to distribution transformer equipment technical field of nondestructive testing, and in particular to a kind of distribution transformer yn connections winding material thermoelectricity Curves Recognition method is coupled winding terminals to yn and is sequentially ingressed into heating device and data acquisition integrated apparatus；The phase winding to be heated is selected, and opens corresponding channel on data acquisition integrated apparatus, then starts heating device；Under heated condition, pay attention to seeing whether that there are hot-spot phenomenons；Gathered data obtains thermoelectricity curve of the thermoelectrical potential about the temperature difference under the state of cooling, and curve theory is linear, can comprehensive judgement winding material according to the distributed areas of curve and slope.This method can effectively detect winding material, have the characteristics that simple and efficient, accuracy is high and lossless to power equipment.
Description
Technical field
The invention belongs to distribution transformer equipment technical field of nondestructive testing more particularly to a kind of distribution transformer yn to be coupled
Winding material thermoelectricity Curves Recognition method.
Background technology
Distribution transformer is large number of, there is very important status in Rural Power Distribution Network and urban power distribution network, with life
Work is closely bound up.In recent years, climbing up and up with copper processing, copper aluminium market price difference gradually widen, a small number of transformer production factories
Family works hard, there is the bad phenomenons of " replacing copper with aluminium " in the market, give distribution to obtain the profit of bigger on winding material
The actual motion of transformer, which is brought, to be seriously affected.
Use such as thermo-electric method, temperature-coefficient of electrical resistance method, x-ray method, statistical approach, frequency response method, number at present
The lossless detection methods such as word eddy-current method, metal detection method carry out detection winding material, but do not obtain ideal effect when practice.
For being molded distribution transformer, winding is encapsulated among babinet or insulating materials, cannot be straight by naked eyes
Observation is connect, the model identification on nameplate is often different from reality material, and casing draws material and also tends to differ with winding material.
If winding material is using aluminum steel or copper-clad aluminum conductor, the connector to extend out still can connect copper material by copper aluminium welding method
Matter.Only with existing technology detection means, it is difficult to find materials variances from the conventional projects such as short circuit, zero load, insulation performance.For
The phenomenon that preventing " replacing copper with aluminium " from further developing into " adulterating ", increase efforts of investigation and prosecution is particularly necessary, identifies distribution in time
Transformer winding material is significant for improving security of distribution network.
Invention content
The object of the present invention is to provide a kind of methods that is simple and efficient, lossless accurate and effectively detecting winding material.
To achieve the above object, the technical solution adopted by the present invention is a kind of distribution transformer yn connection windings material heat
Electric Curves Recognition method, includes the following steps：
Step 1 is sequentially ingressed into heating device and data acquisition integrated apparatus to yn connection winding terminals；
Step 2, the selection phase winding to be heated, and corresponding service aisle on data acquisition integrated apparatus is opened, then
Start heating device；
In step 3, heating process, the service aisle of data acquisition integrated apparatus is monitored required data；Work as fire end
When sub- temperature reaches temperature limit, heater stop heating；When entering the state of cooling, data acquisition integrated apparatus starts
Gathered data；
Step 4, the thermoelectrical potential drawn by institute's gathered data judge about the distributed areas of the scatterplot curve graph of the temperature difference and slope
Winding material.
The invention has the advantages that the present invention can realize Simultaneous Monitoring and the acquisition of multichannel complex data.It can root
Dual judgement winding material, reserved buffer when threshold value is set, serious forgiveness higher are carried out according to the distributed areas of curve and slope.
In the case of not destroying transformer device structure and insulation, the non-destructive testing to winding material can be realized, have simple and efficient, lossless
Accurate feature.
Description of the drawings
Fig. 1 is that one embodiment of the invention yn is coupled winding thermoelectricity wiring diagram；
Fig. 2 is that one embodiment of the invention yn is coupled winding electrothermal circuit schematic diagram；
Fig. 3 is that one embodiment of the invention Dyn11 is coupled winding heat run thermoelectricity curve graph；
Fig. 4 is one embodiment of the invention distribution transformer winding material thermoelectricity Curves Recognition method flow diagram.
Specific implementation mode
Embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.
As shown in figure 4, the present embodiment is achieved through the following technical solutions, a kind of distribution transformer yn connections winding material
Matter thermoelectricity Curves Recognition method, specifically includes following steps：
S1. it is coupled winding terminals to yn and is sequentially ingressed into heating device and data acquisition integrated apparatus；
S2. the phase winding to be heated is selected, and opens corresponding service aisle on data acquisition integrated apparatus（Winding connects
The circular terminal and triangle terminal at head place indicate pressure measurement terminal and take warm terminal respectively, pressure measurement terminal corresponding channel 1,3,5,7,
Warm terminal corresponding channel 2,4,6,8, channel 1,2 is taken to be set as normally opened, rest channels are set as normally closed）, then start heating dress
It sets；
S3. in heating process, the service aisle of data acquisition integrated apparatus is monitored required data.When heating terminal
When temperature reaches temperature limit, heater stop heating.When entering the state of cooling, data acquisition integrated apparatus starts to adopt
Collection, device carry differential thermal calculation function and voltage gain function；
S4. according to the thermoelectrical potential that collects about the distributed areas of the scatterplot curve graph of the temperature difference and slope can comprehensive judgement around
Group material.
As shown in Figure 1, it includes high-frequency induction heating apparatus, data acquisition integration that yn, which is coupled winding thermoelectricity wiring diagram mainly,
Device and PC.Heating device can rapidly and efficiently heat it by heating heating coil non-contact be socketed on terminal.
Data, which acquire integrated apparatus, has 8 channels, and the circular terminal and triangle terminal at winding joint indicate pressure measurement end respectively
Son and take warm terminal, pressure measurement terminal corresponding channel 1,3,5,7 that warm terminal corresponding channel 2,4,6,8, channel 1,2 is taken to be set as normal
It opens, rest channels are set as normally closed.PC can import the data of acquisition by usb data capture card, and be correspondingly processed.
Actual electrothermal circuit is simplified as shown in Fig. 2, yn is coupled winding electrothermal circuit schematic diagram.Yn is coupled
For winding, each phase winding is mutual indepedent in gatherer process（It only include a phase winding in electrothermal circuit）, from end by interior and
Outer to be connected to copper bar and copper conducting rod respectively, external voltmeter both ends still use copper lead, in this way since, in entire thermoelectricity
In circuit, other than winding material is uncertain, remaining material is copper.
It needs clearly 2 points following：
If one, connecting the both ends of two different conductive materials to form a complete circuit, then two kinds of materials connect
The temperature difference of point can make to generate small DC voltage between entire circuit.I.e. for theory, when winding material is copper, in circuit
Only include a kind of metal material, not will produce apparent thermoelectrical potential；When winding material is aluminium, two kinds of items of dissimilar metal and the temperature difference
Part is met, therefore will produce apparent thermoelectrical potential.
It is as long as keeping middle conductor two-terminal temperature identical, then right if two, being inserted into middle conductor between A, B conductor
The total thermoelectrical potential for the electrothermal circuit that A, B are constituted does not have an impact.This, which is also institute's access voltmeter both ends, need to use copper lead
Reason.
When it is implemented, a kind of distribution transformer yn is coupled winding material thermoelectricity Curves Recognition method, include the following steps：
1, it is coupled winding terminals to yn and is sequentially ingressed into heating device and data acquisition integrated apparatus；
Specifically, being coupled winding for yn, pay attention to disconnecting center line and ground wire.
2, the phase winding to be heated is selected, and opens corresponding channel on data acquisition integrated apparatus（Winding joint
The circular terminal and triangle terminal at place indicate pressure measurement terminal and warm terminal, pressure measurement terminal corresponding channel 1,3,5,7 are taken to take respectively
Warm terminal corresponding channel 2,4,6,8, channel 1,2 are set as normally opened, and rest channels are set as normally closed）, then start heating device；
Specifically, including that a pressure measurement terminal and one take warm terminal at each terminal：Pressure measurement terminal must use brass bolt
Fastening, far from hot spot（Not heated temperature influences）；It takes warm terminal that the mode for attaching thermocouple probe can be used, pays attention to adding used outside insulated
Adhesive tape.
3, in heating process, the service aisle of data acquisition integrated apparatus is monitored required data.Work as fire end
When sub- temperature reaches temperature limit, heater stop heating.When entering the state of cooling, data acquisition integrated apparatus starts
Acquisition, device carry differential thermal calculation function and voltage gain function；
For temperature limit：National standard " GB 1094.2-2003 power transformer part 2s：The temperature of liquid soaking transformer
Liter " has made winding temperature rise of hot spot the regulation of 78K；National standard " the 11st part dry type of GBT 1094.11-2007 power transformers
Transformer " has made winding average temperature rising limit value of the F grades of dry-type transformers under rated current the regulation of 100K；Newest publication
The temperature limit of fuel tank and body structure surface is made in the notice of the 7 class standard technique specification such as new edition 10kV distribution transformers
The regulation of 80K.To sum up, the threshold value for taking 60K to be set as heating device after nargin is adjusted.
It 4, can comprehensive judgement about the distributed areas of the scatterplot curve graph of the temperature difference and slope according to the thermoelectrical potential collected
Winding material.
Specifically, with model machine pilot survey a bench-type number is unknown, bind mode for Dyn11 dry-type distribution transformer
C（c）For phase winding, the thermoelectricity curve graph of high-pressure side and low-pressure side is as shown in Figure 3.
The result of actual measurement shows that low-pressure side winding material is copper, high-pressure side winding material is then aluminium.To be verified, after to C
（c）Phase winding is dismantled, and as a result shows that C phase windings are aluminum steel coiling, c phase windings are copper foil coiling.
It should be understood that the part that this specification does not elaborate belongs to the prior art.
Although describing the specific implementation mode of the present invention above in association with attached drawing, those of ordinary skill in the art should
Understand, these are merely examples, and various deformation or modification can be made to these embodiments, without departing from the original of the present invention
Reason and essence.The scope of the present invention is only limited by the claims that follow.
Claims (1)
1. a kind of distribution transformer yn is coupled winding material thermoelectricity Curves Recognition method, characterized in that include the following steps：
Step 1 is sequentially ingressed into heating device and data acquisition integrated apparatus to yn connection winding terminals；
Step 2, the selection phase winding to be heated, and corresponding service aisle on data acquisition integrated apparatus is opened, then
Start heating device；
In step 3, heating process, the service aisle of data acquisition integrated apparatus is monitored required data；Work as fire end
When sub- temperature reaches temperature limit, heater stop heating；When entering the state of cooling, data acquisition integrated apparatus starts
Gathered data；
Step 4, the thermoelectrical potential drawn by institute's gathered data judge about the distributed areas of the scatterplot curve graph of the temperature difference and slope
Winding material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810193464.7A CN108398458A (en) | 2018-03-09 | 2018-03-09 | A kind of distribution transformer yn connections winding material thermoelectricity Curves Recognition method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810193464.7A CN108398458A (en) | 2018-03-09 | 2018-03-09 | A kind of distribution transformer yn connections winding material thermoelectricity Curves Recognition method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101726515A (en) * | 2008-10-16 | 2010-06-09 | 淄博计保互感器研究所 | Tester and testing method for winding lead material of transformer |
| CN104677927A (en) * | 2015-03-10 | 2015-06-03 | 国网四川省电力公司电力科学研究院 | Distribution transformer winding material detection system and method |
| 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 |
| CN205808974U (en) * | 2016-07-05 | 2016-12-14 | 国网重庆市电力公司电力科学研究院 | A kind of Transformer Winding material intelligent diagnostics device |
| CN107192738A (en) * | 2017-07-19 | 2017-09-22 | 云南电网有限责任公司电力科学研究院 | A kind of detection method and device of distribution transformer winding material |
| CN107655940A (en) * | 2017-09-18 | 2018-02-02 | 国网重庆市电力公司电力科学研究院 | A kind of Transformer Winding wood properly test equipment and system |
-
2018
- 2018-03-09 CN CN201810193464.7A patent/CN108398458A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101726515A (en) * | 2008-10-16 | 2010-06-09 | 淄博计保互感器研究所 | Tester and testing method for winding lead material of transformer |
| CN104677927A (en) * | 2015-03-10 | 2015-06-03 | 国网四川省电力公司电力科学研究院 | Distribution transformer winding material detection system and method |
| 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 |
| CN205808974U (en) * | 2016-07-05 | 2016-12-14 | 国网重庆市电力公司电力科学研究院 | A kind of Transformer Winding material intelligent diagnostics device |
| CN107192738A (en) * | 2017-07-19 | 2017-09-22 | 云南电网有限责任公司电力科学研究院 | A kind of detection method and device of distribution transformer winding material |
| CN107655940A (en) * | 2017-09-18 | 2018-02-02 | 国网重庆市电力公司电力科学研究院 | A kind of Transformer Winding wood properly test equipment and system |
Non-Patent Citations (3)
| Title |
|---|
| 何良等: "一种用于配电变压器绕组材质诊断的新方法", 《四川电力技术》 * |
| 叶明超: "《自动检测与转换技术（第2版）》", 31 January 2017, 北京理工大学出版社 * |
| 杜林等: "基于热电效应的变压器绕组材质鉴别方法", 《高电压技术》 * |
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Application publication date: 20180814 |