CN104820171A - Partial discharge test oil cup for oil-paper insulation - Google Patents
Partial discharge test oil cup for oil-paper insulation Download PDFInfo
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- CN104820171A CN104820171A CN201510179618.3A CN201510179618A CN104820171A CN 104820171 A CN104820171 A CN 104820171A CN 201510179618 A CN201510179618 A CN 201510179618A CN 104820171 A CN104820171 A CN 104820171A
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Abstract
A partial discharge test oil cup for oil-paper insulation is characterized in that the partial discharge test oil cup comprises a polymethyl methacrylate tube which has a smooth inner wall; the upper opening of the polymethyl methacrylate tube is provided with a polymethyl methacrylate upper cover, and the lower opening is provided with an aluminum lower cover; the polymethyl methacrylate upper cover is provided with a through hole at the central part; a first metal guide rod penetrates through the through hole; a sink hole is arranged at the middle part of the top surface of the aluminum lower cover; a vertical second metal guide rod is fixed in the sink hole; the upper end of the second metal guide rod is inserted into the sink hole at the bottom surface of a brass circular-plate-shaped electrode; an annular polymethyl methacrylate pressure plate is arranged between the first metal guide rod and the brass circular-plate-shaped electrode; the brass circular-plate-shaped electrode pressure plate is in vertically movable clearance fit with the brass circular-plate-shaped electrode tube; the internal diameter of the brass circular-plate-shaped electrode pressure plate is smaller than that of the circular-plate-shaped electrode; the upper end of the first metal guide rod is connected with a high-voltage power supply; and the aluminum lower cover is connected with a ground wire. High-voltage electrode replacement and adjustment for space between the high-voltage electrode and a grounding electrode are facilitated. The insulation paper is flattened and fixed at a required position and does not float.
Description
Technical field
The present invention relates to a kind of paper oil insulation partial discharge test lubricating cup.
Background technology
Paper oil insulation is widely used in electric system, and oil-filled transformer insulation system forms primarily of fluid insulation and solid insulation two parts, the paper oil insulation that solid insulation is exactly.Transformer oilpaper is as the important component part of insulation system, and in the process run, be subject to the multi-stress aging impacts such as temperature, electric field, oxygen, moisture and metallic impurity for a long time, decreasing insulating, directly threatens the safe operation of transformer.Particularly because the defect of paper oil insulation inside causes shelf depreciation, cause insulation breakdown and cause the accident of equipment power-off fault to happen occasionally, the interruption of electric power supply causes huge economic loss.
Many research is had at present about paper oil insulation shelf depreciation.Due to paper oil insulation puncture after irrecoverability, the little defect model device of ordinary test all in oily cylinder carries out.Oily cylinder in prior-art devices often also exists that high-pressure side pin electrode is not easily changed, problems such as distance inconvenience adjusts, individual insulating paper cannot flatten between high-pressure side pin electrode and grounded metal ground electrode.
In addition, the compressing method of prior art makes the bubble produced between insulating paper and metal polar plate depart from insulating paper, forms air gap, affect test findings between insulating paper and metal polar plate.
Summary of the invention
Technical matters to be solved by this invention, is just to provide a kind of paper oil insulation partial discharge test lubricating cup, can realizes the adjustment of the replacing of high-pressure side pin electrode and the spacing of high-pressure side pin electrode and grounded metal ground electrode easily; Can ensure that insulating paper all can be driven plain the position being fixed on needs under various discharge test condition simultaneously, can not be floating, also can not form air gap between insulating paper and metal electrode.
Solve the problems of the technologies described above, the present invention adopts following technical scheme:
A kind of paper oil insulation partial discharge test lubricating cup, it is characterized in that: comprise a plexi-glass tubular 1, described plexi-glass tubular inner wall smooth, described plexi-glass tubular upper orifice is provided with organic glass upper cover 3, lower nozzle is provided with aluminum lower cover 4, have through hole in the middle of described organic glass upper cover 3, through hole is installed with the first metal guide rod 7; Have counterbore in the middle of hd top face under described aluminum, the upper end that counterbore is fixed with the second metal guide rod 8, second metal guide rod 8 of a setting is inserted in the counterbore of brass material circular plate type electrode 5 bottom surface; An annular organic glass pressing plate 2 is provided with between the first described metal guide rod and brass material circular plate type electrode 5, described organic glass pressing plate and plexi-glass tubular are clearance fit moving up and down, the internal diameter of described organic glass pressing plate is less than the diameter of circular plate type electrode, described first metal guide rod upper end is connected with high-voltage power supply, and described aluminum lower cover is connected with ground wire.
As the embodiment that the present invention recommends, described upper cover through hole is threaded hole, described first metal guide rod is threaded guide rod, can conveniently fix the first metal guide rod like this, also carrys out the height of free adjustment high-field electrode by rotating the first metal guide rod simultaneously.
Described second metal guide rod and connected mode between circular plate type electrode bottom surface, aluminum lower cover are for being threaded, described second metal guide rod two ends are provided with external thread, under described circular plate type electrode bottom surface, aluminum, the counterbore of hd top face is equipped with internal thread, use the mode be threaded both can fix the second metal guide rod, also easy disassembly simultaneously.
Described plexi-glass tubular upper end is provided with outer step trough, and described organic glass upper cover bottom surface is provided with corresponding interior step trough.
Described plexi-glass tubular lower end is provided with external thread, and under described aluminum, hd top face is provided with corresponding internal thread, uses thread connecting mode can easy disassembly and fixing between machine glass tube and aluminum lower cover.
Using method of the present invention: first ground-electrode second metal guide rod lower end 8 is assemblied in the counterbore 41 of aluminum lower cover 4, upper end connects brass material circular plate type electrode 5, then aluminum lower cover 4 is assemblied on plexi-glass tubular 1.Then, between the circular plate type electrode 5 insulating paper 6 being placed on organic glass pressing plate 2 and brass material, organic glass pressing plate 2 is made to compress insulating paper 6.High voltage needle electrode needed for test is assemblied in the first metal guide rod 7 lower end, and the first metal guide rod 7 is assemblied in the threaded hole 31 of organic glass upper cover 3.Insulating oil is injected plexi-glass tubular 1, and organic glass upper cover 3 is covered on plexi-glass tubular 1, put into vacuum tank vacuumize and after leaving standstill 24h, the first metal guide rod 7 be connected high-voltage power supply and ground wire respectively with aluminum lower cover 4, start to carry out partial discharge test.
Compared with prior art, inventive article has the following advantages:
1, high-field electrode is convenient for changing;
2, the distance between convenient adjustment high-field electrode and ground-electrode
3, insulating paper is driven plain the position that is fixed on needs and can not be floating, therefore can not form air gap between insulating paper and metal electrode.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present invention;
Fig. 2 is plexi-glass tubular schematic diagram of the present invention;
Fig. 3 is organic glass upper cover schematic diagram of the present invention;
Fig. 4 is aluminum lower cover schematic diagram of the present invention;
Fig. 5 is organic glass pressing plate schematic diagram of the present invention;
Fig. 6 is the shelf depreciation PRPD spectrogram of the present invention when applying;
Fig. 7 is the partial discharge pulse time-domain diagram of the present invention when applying.
In figure: 1-plexi-glass tubular, 2-pressing plate, 3-upper cover, 4-lower cover, 5-circular plate type electrode, 6-insulating paper, 7-first metal guide rod, 8-second metal guide rod, 31-through hole, 41-counterbore.
Embodiment
Below in conjunction with accompanying drawing, by embodiment, the invention will be further described.
As shown in Fig. 1 ~ 5, a kind of paper oil insulation partial discharge test lubricating cup, it is characterized in that: comprise a plexi-glass tubular 1, described plexi-glass tubular inner wall smooth, described plexi-glass tubular upper orifice is provided with organic glass upper cover 3, lower nozzle is provided with aluminum lower cover 4, have through hole 31 in the middle of described organic glass upper cover 3, through hole is installed with the first metal guide rod 7; Have counterbore 41 in the middle of hd top face under described aluminum, the upper end that counterbore is fixed with the second metal guide rod 8, second metal guide rod 8 of a setting is inserted in the counterbore of brass material circular plate type electrode 5 bottom surface; An annular organic glass pressing plate 2 is provided with between the first described metal guide rod and brass material circular plate type electrode 5, described organic glass pressing plate and plexi-glass tubular are clearance fit moving up and down, the internal diameter of described organic glass pressing plate is less than the diameter of circular plate type electrode, described first metal guide rod upper end is connected with high-voltage power supply, and described aluminum lower cover is connected with ground wire.
In the present embodiment, described upper cover through hole is threaded hole, and described first metal guide rod is threaded guide rod, can conveniently fix the first metal guide rod like this, also carrys out the height of free adjustment high-field electrode by rotating the first metal guide rod simultaneously.
Described second metal guide rod and connected mode between circular plate type electrode bottom surface, aluminum lower cover are for being threaded, described second metal guide rod two ends are provided with external thread, under described circular plate type electrode bottom surface, aluminum, the counterbore of hd top face is equipped with internal thread, use the mode be threaded both can fix the second metal guide rod, also easy disassembly simultaneously.
Described plexi-glass tubular upper end is provided with outer step trough, and described organic glass upper cover bottom surface is provided with corresponding interior step trough.
Described plexi-glass tubular lower end is provided with external thread, and under described aluminum, hd top face is provided with corresponding internal thread, uses thread connecting mode can easy disassembly and fixing between machine glass tube and aluminum lower cover.
Using method of the present invention: first ground-electrode second metal guide rod lower end 8 is assemblied in the counterbore 41 of aluminum lower cover 4, upper end connects brass material circular plate type electrode 5, then aluminum lower cover 4 is assemblied on plexi-glass tubular 1.Then, between the circular plate type electrode 5 insulating paper 6 being placed on organic glass pressing plate 2 and brass material, organic glass pressing plate 2 is made to compress insulating paper 6.High voltage needle electrode needed for test is assemblied in the first metal guide rod 7 lower end, and the first metal guide rod 7 is assemblied in the threaded hole 31 of organic glass upper cover 3.Insulating oil is injected plexi-glass tubular 1, and organic glass upper cover 3 is covered on plexi-glass tubular 1, put into vacuum tank vacuumize and after leaving standstill 24h, the first metal guide rod 7 be connected high-voltage power supply and ground wire respectively with aluminum lower cover 4, start to carry out partial discharge test.
Test findings as shown in Figure 6,7 shows, the shelf depreciation PRPD spectrogram carried out in the present invention meets shelf depreciation in oil and mainly occurs in the feature of voltage rising edge.Meanwhile, shown by the frequency-domain analysis result after carrying out Fast Fourier Transform (FFT) to local discharge pulse signal, its discharge energy mainly concentrates between 10MHz-30MHz, also has certain distribution at 40MHz place simultaneously.Time domain beamformer shows that partial discharge pulse's form is mainly and be superimposed with many high frequency spikes in an Exponential Decay Wave, and this is also identical with the canonical form of shelf depreciation in oil.In sum, result can prove that the present invention meets the requirement of test at present completely by experiment.
Claims (5)
1. a paper oil insulation partial discharge test lubricating cup, it is characterized in that: comprise a plexi-glass tubular, described plexi-glass tubular inner wall smooth, described plexi-glass tubular upper orifice is provided with organic glass upper cover, lower nozzle is provided with aluminum lower cover, have through hole in the middle of described organic glass upper cover, through hole is installed with the first metal guide rod;
Have counterbore in the middle of hd top face under described aluminum, counterbore is fixed with the second metal guide rod of a setting, and the upper end of the second metal guide rod is inserted in the counterbore of a brass material circular plate type electrode bottom surface;
An annular organic glass pressing plate is provided with between the first described metal guide rod and brass material circular plate type electrode, described organic glass pressing plate and plexi-glass tubular are clearance fit moving up and down, the internal diameter of described organic glass pressing plate is less than the diameter of circular plate type electrode, described first metal guide rod upper end is connected with high-voltage power supply, and described aluminum lower cover is connected with ground wire.
2. paper oil insulation local discharge test device according to claim 1, is characterized in that: described upper cover through hole is threaded hole, and described first metal guide rod is threaded guide rod.
3. paper oil insulation local discharge test device according to claim 1, is characterized in that: described second metal guide rod and connected mode between circular plate type electrode bottom surface, aluminum lower cover are for being threaded.
4. paper oil insulation local discharge test device according to claim 1, is characterized in that: described plexi-glass tubular upper end is provided with outer step trough, and described organic glass upper cover bottom surface is provided with corresponding interior step trough.
5. paper oil insulation local discharge test device according to claim 1, is characterized in that: described plexi-glass tubular lower end is provided with external thread, and under described aluminum, hd top face is provided with corresponding internal thread.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510179618.3A CN104820171B (en) | 2015-04-15 | 2015-04-15 | A kind of paper oil insulation partial discharge test lubricating cup |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510179618.3A CN104820171B (en) | 2015-04-15 | 2015-04-15 | A kind of paper oil insulation partial discharge test lubricating cup |
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| CN104820171A true CN104820171A (en) | 2015-08-05 |
| CN104820171B CN104820171B (en) | 2018-04-13 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105974286A (en) * | 2016-06-29 | 2016-09-28 | 国家电网公司 | Oil paper insulation gliding spark discharge test device |
| CN107179488A (en) * | 2017-06-06 | 2017-09-19 | 国网浙江省电力公司电力科学研究院 | A kind of paper oil insulation local discharge test device |
| CN108414904A (en) * | 2018-03-27 | 2018-08-17 | 哈尔滨理工大学 | A kind of electrode assembly in transformer oil paper insulation void defects shelf depreciation research |
| CN110426609A (en) * | 2019-07-18 | 2019-11-08 | 中原工学院 | A kind of more partial discharge form simulations of transformer and test macro |
| CN112731074A (en) * | 2020-12-17 | 2021-04-30 | 深圳供电局有限公司 | Oil paper insulation aging test system |
| CN113188991A (en) * | 2021-05-24 | 2021-07-30 | 攀枝花学院 | Device suitable for flow corrosion and electrochemical in-situ test |
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| CN102540026A (en) * | 2012-01-05 | 2012-07-04 | 中国电力科学研究院 | Oil cup for insulating oil impact characteristic research |
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| CN203572920U (en) * | 2013-11-25 | 2014-04-30 | 国家电网公司 | Parameter-adjustable suspended discharge test model |
| CN104101820A (en) * | 2014-07-17 | 2014-10-15 | 国网上海市电力公司 | Transformer oil/paper insulation aging experimental device and method |
| CN204731367U (en) * | 2015-04-15 | 2015-10-28 | 广东电网有限责任公司电力科学研究院 | A kind of paper oil insulation partial discharge test lubricating cup |
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2015
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2010073984A (en) * | 2008-09-19 | 2010-04-02 | Toshiba Corp | Partial discharge diagnostic device of stationary inductive electric apparatus |
| CN102540026A (en) * | 2012-01-05 | 2012-07-04 | 中国电力科学研究院 | Oil cup for insulating oil impact characteristic research |
| CN203572919U (en) * | 2013-11-25 | 2014-04-30 | 国家电网公司 | Parameter-adjustable along-surface discharge test model |
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| CN204731367U (en) * | 2015-04-15 | 2015-10-28 | 广东电网有限责任公司电力科学研究院 | A kind of paper oil insulation partial discharge test lubricating cup |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105974286A (en) * | 2016-06-29 | 2016-09-28 | 国家电网公司 | Oil paper insulation gliding spark discharge test device |
| CN105974286B (en) * | 2016-06-29 | 2019-06-18 | 国家电网公司 | Paper oil insulation is along face gliding spark discharge experimental rig |
| CN107179488A (en) * | 2017-06-06 | 2017-09-19 | 国网浙江省电力公司电力科学研究院 | A kind of paper oil insulation local discharge test device |
| CN107179488B (en) * | 2017-06-06 | 2024-03-26 | 国网浙江省电力公司电力科学研究院 | Oilpaper insulation partial discharge test device |
| CN108414904A (en) * | 2018-03-27 | 2018-08-17 | 哈尔滨理工大学 | A kind of electrode assembly in transformer oil paper insulation void defects shelf depreciation research |
| CN110426609A (en) * | 2019-07-18 | 2019-11-08 | 中原工学院 | A kind of more partial discharge form simulations of transformer and test macro |
| CN110426609B (en) * | 2019-07-18 | 2022-01-28 | 中原工学院 | Transformer multi-partial discharge form simulation and test system |
| CN112731074A (en) * | 2020-12-17 | 2021-04-30 | 深圳供电局有限公司 | Oil paper insulation aging test system |
| CN113188991A (en) * | 2021-05-24 | 2021-07-30 | 攀枝花学院 | Device suitable for flow corrosion and electrochemical in-situ test |
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| CN104820171B (en) | 2018-04-13 |
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