CN204740320U - A needle - plate electrode corona discharge assembly for handing over high voltage DC is experimental - Google Patents
A needle - plate electrode corona discharge assembly for handing over high voltage DC is experimental Download PDFInfo
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- CN204740320U CN204740320U CN201520357918.1U CN201520357918U CN204740320U CN 204740320 U CN204740320 U CN 204740320U CN 201520357918 U CN201520357918 U CN 201520357918U CN 204740320 U CN204740320 U CN 204740320U
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- 238000004382 potting Methods 0.000 claims description 17
- 230000005611 electricity Effects 0.000 claims description 14
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 239000007772 electrode material Substances 0.000 claims description 2
- 238000002474 experimental method Methods 0.000 abstract description 3
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- 239000000463 material Substances 0.000 description 7
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- 239000011810 insulating material Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
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- 238000009825 accumulation Methods 0.000 description 1
- 230000003679 aging effect Effects 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
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Abstract
The utility model discloses a needle - plate electrode corona discharge assembly for handing over high voltage DC is experimental, include: needle array electrode and upper and lower metal sheet electrode, the needle array is embedded in last metal sheet, goes up the metal sheet and is connected lower metal sheet electrode ground connection with high -pressure generating device, upper and lower insulation board is connected respectively to upper and lower metal sheet electrode, and the distance between the upper and lower metal sheet electrode is adjustable, the sample is placed under on the metal sheet electrode and just to the needle array, after applying voltage, produce even corona discharge between needle array electrode and the metal sheet electrode, through adjusting the distance between the upper and lower metal sheet electrode, can carry out electric charge attribute testing and quick corona ageing tests to the sample respectively. The utility model discloses beneficial effect: height -adjustable between the upper and lower metal sheet electrode can be used to carry on respectively electric charge characteristic test and quick ageing tests, lower metal sheet electrode length is 5-8 times of the needle array, can carry out the corona discharge experiment to a plurality of samples simultaneously.
Description
Technical field
The utility model relates to alternating current-direct current High-Voltage Experimentation Technology field, particularly relates to a kind of Field of Corona between Needle and Board electric discharge device for alternating current-direct current high-potting.
Background technology
Polymer dielectric relies on the physical property of its excellence, mechanical property and thermal behavior, and be widely used in electric/electronic device, can the quality of its insulating property is directly connected to equipment safe and stable operation.In the composite insulation system be made up of solids-gases, when applying certain voltage on insulation system, electric discharge always first occurs on solid-air interface, i.e. creeping discharge.Along with voltage raises further, creeping discharge can develop into perfoliate puncturing, and is called edge flashing.When edge flashing occurs, the failure of insulation of system, usually causes accident to occur.All have both at home and abroad and cause electrical equipment to damage about polymer dielectric edge flashing or cause the report of large area blackout.Large quantity research shows, the existence of surface charge not only makes the applied electric field of insulating material distort, and more the evolution of edge flashing provides required electric charge, is cause solid surface dielectric strength to reduce, cause creeping discharge accident, cause the major reason that electrical equipment damages.
Therefore, the mechanism investigating surface charge accumulation and dissipation, to reasonable employment polymer dielectric, is deeply familiar with the essence of edge flashing, ensures that the safe operation of power equipment has important theory significance and practical value.And the research to dielectric charge characteristic, need the surface charge being injected quantitative and qualitative in laboratory by high-potting system to dielectric, in test, the performance of needle plate electrode device used will directly affect the distribution character of surface charge on insulating material surface, thus has an impact to test findings.
On the other hand, silicon rubber compound insulator uses the history having had nearly 40 years as transmission line of electricity external insulation, all use composite insulator in the electrical network of a lot of countries and regions.But silastic material is organic material, different with the inorganic material such as glass insulator from pottery, the large molecule of organic material easily ruptures, and especially under the environmental factor effects such as corona discharge, molecular link easily ruptures, and causes organic material aging.When composite insulator occurs aging, its surface hydrophobicity declines, and electric property and mechanical property all can decline thereupon.For simulating composite insulator aging performance under different running environment better, Chinese scholars has carried out large quantifier elimination to composite insulator artificial accelerated aging test method, but not yet forms very complete unified standard test method.In high-potting, accelerated aging test is carried out to composite insulator, pin-plate corona discharge electrode is indispensable device in test equally, and pin electrode distribution character is directly connected to the distribution situation of silastic surface ageing properties, to directly having an impact to test figure.
No matter be charge characteristic test or quick corona aging test, needle to board electrode is all the key factor in test.Both require that pin electrode used arranges evenly, but needle to board electrode spacing is had any different again in concrete test, therefore the distribution of two kinds of test electrode used thereins is slightly different again, different test mechanism electrode used thereins often differs larger, when carrying out charge characteristic test and quick corona aging test, often need individually to build pin array-plate electrode, and can not set of device be shared.
Utility model content
The purpose of this utility model is exactly to solve the problem, propose a kind of Field of Corona between Needle and Board electric discharge device for alternating current-direct current high-potting, this device uses easy to assembly, sound construction, security high, and can by highly regulating change needle to board electrode spacing to be applicable to dielectric charge injection test and quick corona aging test.
To achieve these goals, the utility model adopts following technical scheme:
For a Field of Corona between Needle and Board electric discharge device for alternating current-direct current high-potting, comprising: needle-array electrode and upper and lower plate electrodes; Described needle-array electrode is embedded in sheet metal, and upper sheet metal is connected with high-voltage generator, lower plate electrodes ground connection; Described upper and lower plate electrodes connects upper and lower insulcrete respectively, and the distance between described upper and lower plate electrodes is adjustable;
Sample is placed on lower plate electrodes also just to needle-array electrode; After applying voltage, uniform corona discharge is produced between needle-array electrode and plate electrodes, by regulating the distance between upper and lower plate electrodes, not needing to change faller gill array structure, charge characteristic test and quick corona aging test can be carried out to sample respectively.
Described needle-array electrode distribution is specially: often all form equilateral triangle between adjacent three pins.
The tip diameter of described needle-array electrode is between 0.2 ~ 0.5mm.
Same needle-array electrode material therefor and tip diameter unification.
Described upper plate electrodes setting position is provided with high-tension electricity pole, is connected with high-voltage generator by high-tension electricity pole.
Described upper plate electrodes is placed in an insulcrete cover, and on described insulcrete cover, corresponding position is provided with the preformed hole for being stretched out by high-tension electricity pole.
Described upper plate electrodes is connected with upper insulation support plate, according to needle-array electrode arrangement, and corresponding position perforating on insulation support plate on described.
Described lower plate electrodes is connected with lower insulation support plate, and described lower insulation support plate length is 5 ~ 8 times of needle-array electrode length.
The length of described lower plate electrodes is 5 ~ 8 times of needle-array electrode length, tests for realizing to multiple sample simultaneously.
Be connected by insulation blanket stud between described upper and lower insulation support plate, and regulate the distance between upper and lower insulation support plate by setting nut, and then regulate the distance between upper and lower plate electrodes.
The beneficial effects of the utility model are:
The utility model uses sound construction, wiring simple, easy to assembly; Upper sheet metal high-field electrode part is all placed in insulating boot, safely, reliably.
The arrangement of the utility model needle-array electrode is specially, and the spacing of every three pins is equilateral triangle, and needle-array electrode tip diameter is between 0.2 ~ 0.5mm, is conducive to forming field strength distribution at dielectric surface even.
Height adjustable between the upper and lower plate electrodes of the utility model, can be used for carrying out charge characteristic experiment and Accelarated aging test respectively; Lower plate electrodes length is 5 ~ 8 times of pin array, can carry out corona test to multiple sample simultaneously.
Accompanying drawing explanation
Fig. 1 is the utility model apparatus structure schematic diagram;
Fig. 2 is the utility model needle-array electrode arrangement schematic diagram.
Wherein, 1 time insulation support plate, 2 times sheet metals, 3 insulating nuts, insulation support plate on 4,5 insulation blanket studs, 6 needle-array electrodes, sheet metal on 7,8 insulating boots, 9 high-tension electricity poles.
Embodiment:
Below in conjunction with accompanying drawing and embodiment, the utility model is described further:
A kind of Field of Corona between Needle and Board electric discharge device for alternating current-direct current high-potting, as shown in Figure 1, comprise needle-array electrode 6 and upper and lower sheet metal 2 electrode, needle-array electrode 6 is connected to sheet metal 7, upper sheet metal 7 is connected with high-voltage generator, lower sheet metal 2 electrode ground connection; Sample is placed on lower sheet metal 2 electrode also just to needle-array electrode 6; After applying voltage, producing uniform corona discharge between needle-array electrode 6 and plate electrodes can to specimen surface iunjected charge, and acceleration sample is aging.
Needle-array electrode distribution is as follows: the spacing of every three pins is equilateral triangle, and needle-array electrode 6 tip diameter is between 0.2 ~ 0.5mm, with an array needle-array electrode 6 used material and tip diameter unification.Pin array is embedded in sheet metal 7.
Upper sheet metal 7 is equipped with a high-tension electricity pole 9 at fixed bit, facilitates test connection, and upper sheet metal 7 and high-tension electricity pole 9 material therefor are copper.Upper sheet metal 7 is placed in insulation support plate 4 on, and upper insulation support plate 4 material therefor is teflon or epoxy resin, and according to the perforating of pin array arrangement in upper insulation support plate 4.
Upper sheet metal 7 covers in an insulating boot 8, and described insulating boot 8 material therefor is teflon or epoxy resin, and leaves a hole in fixed position, so that high-tension electricity pole 9 stretches out.By this layout, whole electrification in high voltage device being covered in a seal, only staying a high-tension electricity pole 9 for connecing high-voltage test electric power, improve equipment safety coefficient.
Lower sheet metal 2 is placed in lower insulation support plate 1, and is equipped with a preformed hole at fixed bit, so that connect ground wire; Material therefor is aluminium sheet or copper coin.Lower insulation support plate 1 material therefor is epoxy resin, and length is 5 ~ 8 times of described pin array, and lower sheet metal 2 length is identical with lower insulation support plate 1 length, so that can carry out corona test to multiple sample simultaneously.
Upper and lower insulation support plate 1 is connected by insulation blanket stud 5, and the spacing of two back up pads of readjusting prices by nut and screw rod, thus the distance between needle-array electrode 6 and plate electrode can be changed.
Specific experiment process is as follows:
Embodiment 1
(1) corona unit high-tension electricity pole 9 is connect high-voltage ac power, the silicon rubber being of a size of 80mm × 40mm is placed on lower insulation support plate 1, regulated by insulating nut 3 and make pin electrode 6 to sample apart from being 50mm; And by lower sheet metal 2 ground connection.
(2) by regulate high-voltage ac power adjustment output voltage be 10kV, pressing time 6h;
(3) after having pressurizeed, sample is taken out, and measure its surperficial diverse location place static contact angle.
(4) contrast of specimen surface diverse location static contact angle is found: specimen surface static contact angle is evenly distributed, and shows that specimen surface degree of aging is evenly distributed.
Embodiment 2
(1) corona unit high-tension electricity pole 9 is connect high-voltage DC power supply, the epoxy specimens being of a size of 80mm × 40mm is placed on lower insulation support plate 1, regulated by insulating nut 3 and make needle-array electrode 6 to sample apart from being 30mm; And by lower sheet metal 2 ground connection.
(2) by regulating high-voltage DC power supply adjustment output voltage to be+3kV, 15 minutes pressing times;
(3) after having pressurizeed, sample is taken out, and measure its surperficial diverse location place current potential with electrometer.
(4) distribution of duplicate surface potential finds that specimen surface Potential distribution is even, shows needle-array electrode arrangement evenly, is evenly distributed to specimen surface iunjected charge amount.
By reference to the accompanying drawings embodiment of the present utility model is described although above-mentioned; but the restriction not to the utility model protection domain; one of ordinary skill in the art should be understood that; on the basis of the technical solution of the utility model, those skilled in the art do not need to pay various amendment or distortion that creative work can make still within protection domain of the present utility model.
Claims (10)
1. for a Field of Corona between Needle and Board electric discharge device for alternating current-direct current high-potting, it is characterized in that, comprising: needle-array electrode and upper and lower plate electrodes; Described needle-array electrode is embedded in sheet metal, and upper sheet metal is connected with high-voltage generator, lower plate electrodes ground connection; Described upper and lower plate electrodes connects upper and lower insulcrete respectively, and the distance between described upper and lower plate electrodes is adjustable;
Sample is placed on lower plate electrodes also just to needle-array electrode; After applying voltage, between needle-array electrode and plate electrodes, producing uniform corona discharge, by regulating the distance between upper and lower plate electrodes, charge characteristic test and quick corona aging test can be carried out to sample respectively.
2. a kind of Field of Corona between Needle and Board electric discharge device for alternating current-direct current high-potting as claimed in claim 1, is characterized in that, described needle-array electrode distribution is specially: often all form equilateral triangle between adjacent three pins.
3. a kind of Field of Corona between Needle and Board electric discharge device for alternating current-direct current high-potting as claimed in claim 1, it is characterized in that, the tip diameter of described needle-array electrode is between 0.2 ~ 0.5mm.
4. a kind of Field of Corona between Needle and Board electric discharge device for alternating current-direct current high-potting as claimed in claim 1, is characterized in that, same needle-array electrode material therefor and tip diameter unified.
5. a kind of Field of Corona between Needle and Board electric discharge device for alternating current-direct current high-potting as claimed in claim 1, it is characterized in that, described upper plate electrodes setting position is provided with high-tension electricity pole, is connected with high-voltage generator by high-tension electricity pole.
6. a kind of Field of Corona between Needle and Board electric discharge device for alternating current-direct current high-potting as claimed in claim 1, it is characterized in that, described upper plate electrodes is placed in an insulcrete cover, and on described insulcrete cover, corresponding position is provided with the preformed hole for being stretched out by high-tension electricity pole.
7. a kind of Field of Corona between Needle and Board electric discharge device for alternating current-direct current high-potting as claimed in claim 1, it is characterized in that, described upper plate electrodes is connected with upper insulation support plate, according to needle-array electrode arrangement, and corresponding position perforating on insulation support plate on described.
8. a kind of Field of Corona between Needle and Board electric discharge device for alternating current-direct current high-potting as claimed in claim 1, it is characterized in that, described lower plate electrodes is connected with lower insulation support plate, and described lower insulation support plate length is 5 ~ 8 times of needle-array electrode length.
9. a kind of Field of Corona between Needle and Board electric discharge device for alternating current-direct current high-potting as claimed in claim 8, it is characterized in that, the length of described lower plate electrodes is 5 ~ 8 times of needle-array electrode length, tests for realizing to multiple sample simultaneously.
10. a kind of Field of Corona between Needle and Board electric discharge device for alternating current-direct current high-potting as claimed in claim 1, it is characterized in that, be connected by insulation blanket stud between described upper and lower insulation support plate, and regulate the distance between upper and lower insulation support plate by setting nut, and then regulate the distance between upper and lower plate electrodes.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520357918.1U CN204740320U (en) | 2015-05-28 | 2015-05-28 | A needle - plate electrode corona discharge assembly for handing over high voltage DC is experimental |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520357918.1U CN204740320U (en) | 2015-05-28 | 2015-05-28 | A needle - plate electrode corona discharge assembly for handing over high voltage DC is experimental |
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| CN204740320U true CN204740320U (en) | 2015-11-04 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104880653A (en) * | 2015-05-28 | 2015-09-02 | 国网山东省电力公司电力科学研究院 | Needle-plate electrode corona discharge assembly for AC-DC high voltage test |
| CN107769102A (en) * | 2017-09-21 | 2018-03-06 | 天津市电力科技发展有限公司 | The method that sided corona treatment improves polypropylene/silicon rubber interface flash-over characteristic |
| CN109541421A (en) * | 2017-09-22 | 2019-03-29 | 平高集团有限公司 | A kind of insulation sample corona ageing test apparatus |
| CN110736903A (en) * | 2019-10-31 | 2020-01-31 | 国网河北省电力有限公司电力科学研究院 | corona discharge research models |
-
2015
- 2015-05-28 CN CN201520357918.1U patent/CN204740320U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104880653A (en) * | 2015-05-28 | 2015-09-02 | 国网山东省电力公司电力科学研究院 | Needle-plate electrode corona discharge assembly for AC-DC high voltage test |
| CN104880653B (en) * | 2015-05-28 | 2018-04-03 | 国网山东省电力公司电力科学研究院 | A kind of needle plate electrode corona discharge assembly for alternating current-direct current high-potting |
| CN107769102A (en) * | 2017-09-21 | 2018-03-06 | 天津市电力科技发展有限公司 | The method that sided corona treatment improves polypropylene/silicon rubber interface flash-over characteristic |
| CN109541421A (en) * | 2017-09-22 | 2019-03-29 | 平高集团有限公司 | A kind of insulation sample corona ageing test apparatus |
| CN109541421B (en) * | 2017-09-22 | 2021-10-29 | 平高集团有限公司 | Corona aging test device for insulation sample |
| CN110736903A (en) * | 2019-10-31 | 2020-01-31 | 国网河北省电力有限公司电力科学研究院 | corona discharge research models |
| CN110736903B (en) * | 2019-10-31 | 2021-08-17 | 国网河北省电力有限公司电力科学研究院 | Corona discharge research device |
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