CN103293385B - Transformer temperature rise test quick test device for direct-current resistance - Google Patents
Transformer temperature rise test quick test device for direct-current resistance Download PDFInfo
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- CN103293385B CN103293385B CN201310176145.2A CN201310176145A CN103293385B CN 103293385 B CN103293385 B CN 103293385B CN 201310176145 A CN201310176145 A CN 201310176145A CN 103293385 B CN103293385 B CN 103293385B
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- 238000012360 testing method Methods 0.000 title claims abstract description 29
- 238000004804 winding Methods 0.000 claims abstract description 28
- 238000013461 design Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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Abstract
The present invention relates to a kind of transformer temperature rise test quick test device for direct-current resistance, its technical characteristics is: comprise the instrument for measuring DC resistance that has three voltage channels, first voltage point of this instrument for measuring DC resistance is connected with the first end points of transformer high-voltage winding with the first electric current contact, second voltage point of this instrument for measuring DC resistance is connected with the second end points of transformer low voltage winding with the second electric current contact, the tertiary voltage contact of this instrument for measuring DC resistance is connected with the second end points of transformer high-voltage winding, second end points of this transformer high-voltage winding is connected by outside line with the first end points of transformer low voltage winding.The design is reasonable, achieve the synchro measure of high and low pressure side direct current resistance in transformer temperature rise test process, improve the test speed of direct current resistance exponentially, ensure that the accuracy of winding temperature rise result of calculation, have speed fast, detect the advantages such as safe and reliable, test result is accurate, easy and simple to handle, antijamming capability is strong.
Description
Technical field
The invention belongs to transformer technology field, especially a kind of transformer temperature rise test quick test device for direct-current resistance.
Background technology
Temperature rise test is one of transformer pattern pilot project, its objective is and will determine whether the temperature rise of each part of transformer meets the prescribed limits of related standards, and wherein winding temperature rise is after temperature rise test reaches stable state, determined by measurement winding thermal resistance.Because temperature and thermal resistance change in time and change, if just measurement data can be read in 1min, measure resistance relative error be no more than 1/30, the relative error calculating temperature rise can not more than IK, therefore, for ensureing the reliability of measurement data, the test duration of quickening direct current resistance of must taking measures, this is the key point of Measurement accuracy winding average temperature rising.But, conventional method is autotomyed disconnected AC-testing supply, after opening short-circuit line, needs carry out resistance measurement to high-pressure side and low-pressure side successively respectively, this must cause the resistance measurement accuracy of wherein side cannot meet temporal requirement, and then has influence on the accuracy of winding temperature rise calculating.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, provide a kind of reasonable in design, precision is high and fireballing transformer temperature rise test quick test device for direct-current resistance.
The present invention solves its technical matters and takes following technical scheme to realize:
A kind of transformer temperature rise test quick test device for direct-current resistance, comprise the instrument for measuring DC resistance that has three voltage channels, first voltage point of this instrument for measuring DC resistance is connected with the first end points of transformer high-voltage winding with the first electric current contact, second voltage point of this instrument for measuring DC resistance is connected with the second end points of transformer low voltage winding with the second electric current contact, the tertiary voltage contact of this instrument for measuring DC resistance is connected with the second end points of transformer high-voltage winding, second end points of this transformer high-voltage winding is connected by outside line with the first end points of transformer low voltage winding.
Advantage of the present invention and good effect are:
The present invention makes full use of series circuit theory and multichannel voltage acquisition mode, achieve the synchro measure of high and low pressure side direct current resistance in transformer temperature rise test process, improve the test speed of direct current resistance exponentially, ensure that the accuracy of winding temperature rise result of calculation, have speed fast, detect the advantages such as safe and reliable, test result is accurate, easy and simple to handle, antijamming capability is strong, improve shutdown transient resistance test accuracy in temperature rise test.
Accompanying drawing explanation
Fig. 1 is test method wiring diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further described.
A kind of transformer temperature rise test quick test device for direct-current resistance, as shown in Figure 1, comprise an instrument for measuring DC resistance, described instrument for measuring DC resistance adopts three voltage channels, it realizes carrying out three voltage acquisition functions by transforming (comprising increase by 1 voltage acquisition passage and the adjustment to built-in calculator function) to Traditional DC resistance meter simultaneously, first voltage point (U1) of this instrument for measuring DC resistance, first electric current contact (I1) is connected with first end points (A) of transformer high-voltage winding, second voltage point (U2) of this instrument for measuring DC resistance, second electric current contact (I2) is connected with the second end points (b) of transformer low voltage winding, the tertiary voltage contact (U3) of this instrument for measuring DC resistance is connected with second end points (B) of transformer high-voltage winding, second end points (B) of this transformer high-voltage winding is connected by the mode of additional connecting line with the first end points (a) of transformer low voltage winding.
The principle of work of this quick test device for direct-current resistance is: be connected in series with high pressure winding one end transformer low voltage winding one end, high pressure line resistance and low-voltage line resistance is made to form series equivalent approach circuit, the principle equal according to element current each in series circuit, utilize three voltage acquisition passages, just can obtain the AC line resistance of high and low pressure side simultaneously.
It is emphasized that; embodiment of the present invention is illustrative; instead of it is determinate; therefore the present invention includes the embodiment be not limited to described in embodiment; every other embodiments drawn by those skilled in the art's technical scheme according to the present invention, belong to the scope of protection of the invention equally.
Claims (1)
1. a transformer temperature rise test quick test device for direct-current resistance, it is characterized in that: comprise the instrument for measuring DC resistance that has three voltage channels, first voltage point of this instrument for measuring DC resistance is connected with the first end points of transformer high-voltage winding with the first electric current contact, second voltage point of this instrument for measuring DC resistance is connected with the second end points of transformer low voltage winding with the second electric current contact, the tertiary voltage contact of this instrument for measuring DC resistance is connected with the second end points of transformer high-voltage winding, second end points of this transformer high-voltage winding is connected by outside line with the first end points of transformer low voltage winding, utilize three voltage acquisition passages to obtain the AC line resistance of high and low pressure side simultaneously,
The described instrument for measuring DC resistance with three voltage channels is that existing instrument for measuring DC resistance increases by 1 voltage acquisition passage and built-in calculator function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310176145.2A CN103293385B (en) | 2013-05-14 | 2013-05-14 | Transformer temperature rise test quick test device for direct-current resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310176145.2A CN103293385B (en) | 2013-05-14 | 2013-05-14 | Transformer temperature rise test quick test device for direct-current resistance |
Publications (2)
| Publication Number | Publication Date |
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| CN103293385A CN103293385A (en) | 2013-09-11 |
| CN103293385B true CN103293385B (en) | 2016-03-02 |
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| CN201310176145.2A Active CN103293385B (en) | 2013-05-14 | 2013-05-14 | Transformer temperature rise test quick test device for direct-current resistance |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022117549A1 (en) * | 2020-12-03 | 2022-06-09 | Omicron Electronics Gmbh | Method and measuring device for determining a resistance of a transformer winding |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104749440B (en) * | 2015-04-03 | 2017-08-04 | 国家电网公司 | A kind of large-scale power transformer D.C. resistance method for rapidly testing |
| CN107367636B (en) * | 2017-06-23 | 2023-09-26 | 山东电力设备有限公司 | Device and method for simultaneously measuring thermal state resistance during voltage regulation and compensation |
| CN109470926B (en) * | 2018-03-02 | 2020-10-16 | 国网浙江省电力公司嘉兴供电公司 | Cable direct current resistance measuring device and application method thereof |
| CN110531122A (en) * | 2019-09-24 | 2019-12-03 | 国网重庆市电力公司电力科学研究院 | A kind of transformer temperature rise test equipment and its wiring control system |
| CN111337750B (en) * | 2020-02-11 | 2021-12-21 | 深圳供电局有限公司 | Method and device for synchronously testing direct resistance of three-phase winding of cable outgoing type transformer |
| CN114113836B (en) * | 2021-11-15 | 2023-10-27 | 中煤科工集团沈阳研究院有限公司 | Temperature rise experimental device and method for isolation transformer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2022117549A1 (en) * | 2020-12-03 | 2022-06-09 | Omicron Electronics Gmbh | Method and measuring device for determining a resistance of a transformer winding |
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| CN103293385A (en) | 2013-09-11 |
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