CN104749499A - Movable testing system for transformer inter-turn insulating electrical aging simulation test - Google Patents
Movable testing system for transformer inter-turn insulating electrical aging simulation test Download PDFInfo
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- CN104749499A CN104749499A CN201510067253.5A CN201510067253A CN104749499A CN 104749499 A CN104749499 A CN 104749499A CN 201510067253 A CN201510067253 A CN 201510067253A CN 104749499 A CN104749499 A CN 104749499A
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Abstract
The invention provides a movable testing system for a transformer inter-turn insulating electrical aging simulation test. The movable testing system is characterized by comprising a box with a box cover, wherein the bottom of the box and the box cover are aluminum alloy plates and the walls of the box are formed by use of epoxy resin resins; rubber sealing rings are arranged between the box bottom and the box cover, and the walls of the box; universal castors are arranged at the bottom surface of the box bottom; round through holes are formed in the centers of the box cover and the box bottom, and connected with an air guide pipe and a transformer oil guide pipe, respectively; each of the other ends of the air guide pipe and the transformer oil guide pipe are connected with a ball valve and a quick connector; a low-voltage lead connecting bolt is further arranged on the upper surface of the box bottom in the box body, while a ground wire connecting bolt is arranged on the box bottom outside the box body; an insulating support is arranged in the box body. The testing system is capable of meeting the mobility and the treatment requirements of vacuum supply during the test; high-voltage wire connection is convenient, and abnormal discharge of the high-voltage lead to the metal part of the box body at the ground potential can be avoided; the insulating support serves as an insulating support for a model coil, and the discharge phenomenon outside inter-turn insulation breakdown can be prevented in the testing process.
Description
Technical field
The present invention relates to the removable pilot system of a kind of transformer turn-to-turn insulation voltage ageing simulation test, may be used for voltage ageing evolution and the flash test of transformer coil turn-to-turn oil-paper combination insulation model.
Background technology
Power transformer is as one of equipment most important in electrical network, and its reliability of operation is directly connected to the operation that can electrical network safe, efficient, economic, and the insulating property of transformer oilpaper then determine the operation conditions of oil-filled transformer.For ensureing the reliability service of oil-immersed power transformer, needing the state of its paper oil insulation of accurate evaluation, recoverable defect is processed, in order to avoid insulation fault occurs too early; Of a specified duration for operation year, the paper oil insulation that degree of aging is darker, then can make reasonable assessment in the late period of its operation life to its degree of aging and residual life, to maximally utilising its serviceable life while guarantee operational reliability.
The characteristic of research transformer oil Aging of Oil-paper Insulation in Oil and mechanism, set up insulation ag(e)ing model, for the insulation ag(e)ing degree identifying transformer, the predict device life-span, reduce power grid accident, improve transformer reliability of operation, there is important learning value and production application value.The insulation system (Electric Field Distribution) adopted due to each position of oil-immersed power transformer and material (cardboard, cable paper, crimped paper and profiled member) difference, so the voltage ageing process at each position is distinct.In order to assess the state of insulation of transformer more accurately, should study the evolution that in transformer, various insulated electro is aging respectively, the voltage ageing of transformer longitudinal insulation (insulating between turn-to-turn insulation, cake) is wherein more important a part of content.
In prior art, carry out electrical ageing test there is many difficulties to the transformer coil of reality, the more similar model coil of researcher Chang Yiyu actual coil is research object.
In test, the whole process of the test of a sample needs to complete in multiple position, as put into sample, vacuumize, withstand voltage aging etc., require chamber convenient mobile; High-voltage connection can not discharge to the grounded part of casing; For eliminating the impact of the impurity such as moisture, bubble as far as possible, by carrying out vacuum drying, vacuum-impregnated model coil puts into chamber and after oiling, needs to vacuumize process to it; The model coil of turn-to-turn insulation exists high simultaneously, and electronegative potential should have bracing or strutting arrangement in chamber, makes it keep enough safe distances with high and low pressure side respectively, to ensure to there will not be turn-to-turn insulation to puncture outer electric discharge phenomena.Visible, it is very necessary for designing a pilot system meeting above requirement.
Summary of the invention
Technical matters to be solved by this invention, just be to provide the removable pilot system of a kind of transformer turn-to-turn insulation voltage ageing simulation test, it effectively can simulate evolution and the breakdown characteristics of turn-to-turn oil-paper combination insulation model voltage ageing under high-power transformer operating mode.
The technical solution adopted for the present invention to solve the technical problems is as follows:
The removable pilot system of a kind of transformer turn-to-turn insulation voltage ageing simulation test, it is characterized in that comprising: the casing of a band case lid, at the bottom of its case and case lid be aluminium alloy plate, tank wall is epoxy resin pipe, rubber seal is provided with at the bottom of case, between case lid and tank wall, at the bottom of case, bottom surface is provided with universal caster wheel, case lid, Xiang Di center have round tube hole, are circumscribed with stainless air conduit and transformer oil conduit respectively, and the other end of air conduit and transformer oil conduit is all connected to ball valve and rapid-acting coupling; At the bottom of case in casing, upper surface is also provided with low-voltage lead connection bolt, is provided with ground wire connection bolt, is placed with insulating support in casing at the bottom of the case outside casing.
In particular:
It is the square aluminium alloy plate of thick 20mm, length of side 600mm at the bottom of described case, at the bottom of case, upper surface middle circle through hole is provided with the counterbore of diameter 40mm, degree of depth 5mm, upper surface at the bottom of case centered by middle circle through hole also has the ring-shaped groove that width is 12mm, the degree of depth is 10mm, internal diameter is 458mm, external diameter is 482mm, groove internal fixtion has the O-ring seal of 8mm crude rubber material, outside ring-shaped groove, be circumferentially dispersed with screw uniformly;
Described case lid is the circular aluminum alloy sheets of thickness 20mm, diameter 520mm, with the center of case lid for the center of circle is processed with the ring-shaped groove that a width is 12mm, the degree of depth is 10mm, internal diameter is 458mm, external diameter is 482mm, groove internal fixtion has the O-ring seal of 8mm crude rubber material;
Described tank wall is the epoxy resin pipe of wall thickness 10mm, internal diameter 460mm, external diameter 480mm, height 425mm, epoxy resin pipe lower end is processed with the external thread of high 50mm, with thickness be 40mm, internal diameter 480mm, external diameter 540mm to be fixed in the ring-shaped groove at the bottom of case by the bolt of M10 after linking together with female aluminium ring, can the closed type of warranty test system lower end.
The invention has the beneficial effects as follows: be provided with universal caster wheel bottom this pilot system, the connecting portion of different parts takes seal approach, can meet the processing requirements vacuumized in mobility and test; The main body of chamber adopts epoxy resin to make, and high-voltage connection is convenient, there will not be high-voltage connection to be in earthy metallic member paradoxical discharge to casing; Be made with the insulating supporting of insulating support as model coil of epoxy material in chamber inside, as long as the size of support is suitable, ensure in process of the test to there will not be turn-to-turn insulation to puncture outer electric discharge phenomena.
Accompanying drawing explanation
Fig. 1 is pilot system one-piece construction cross-sectional schematic of the present invention;
Fig. 2 a is base schematic top plan view;
Fig. 2 b is base cross-sectional schematic;
Fig. 3 a is that aluminium ring structure schematic top plan view fixed by epoxy resin pipe;
Fig. 3 b is that aluminium ring structure cross-sectional schematic fixed by epoxy resin pipe;
Fig. 4 is epoxy resin tubular construction cross-sectional schematic;
Fig. 5 a is cover structure schematic top plan view;
Fig. 5 b is cover structure cross-sectional schematic;
Fig. 6 a is insulating support structure vertical view;
Fig. 6 b is insulating support structural representation.
In figure: 1-first rapid-acting coupling; 2-first ball valve; The stainless steel pipe of 3-air; 4-aluminium alloy case lid; 5-rubber seal; 6-epoxy resin pipe; The high-voltage terminal end of 7-model coil; 8-transformer oil; 9-model coil; 10-insulating support; The low-pressure line-outgoing end of 11-model coil; 12-goes between; 13-low-voltage lead connection bolt; The O-ring seal of 14-quality of rubber materials; Aluminium ring fixed by 15-epoxy resin pipe; 16-ground wire connection bolt; At the bottom of 17-aluminium alloy box; The stainless steel pipe of 18-transformer oil; 19-second ball valve; 20-second rapid-acting coupling; 21-can 360 degree rotate universal caster wheels; The stainless steel pipe mounting hole of 22-transformer oil; 23-castor installation screw; 24-epoxy resin pipe installation screw; 25-ground wire wiring screw; 26-low-voltage lead wiring screw; 27-epoxy resin pipe lower end mounting groove; 28-screw mounting hole; 29-is connected with internal thread with epoxy resin pipe; 30-is connected with external thread with aluminium ring; The stainless steel pipe mounting hole of 31-air; 32-epoxy resin pipe upper end mounting groove.
Embodiment
As shown in Fig. 1,2,3,4,5,6, it is the removable pilot system embodiment of transformer turn-to-turn insulation voltage ageing simulation test of the present invention.
It comprises: the casing of a band case lid 4, at the bottom of its case 17 and case lid 4 be aluminium alloy plate, tank wall is epoxy resin pipe 6, rubber seal 5 is provided with at the bottom of case, between case lid and tank wall, bottom surface at the bottom of case be provided with can 360 degree rotate universal caster wheels 21, case lid, Xiang Di center have round tube hole 22, be circumscribed with stainless air conduit 3 and transformer oil conduit 18 respectively, the other end of air conduit and transformer oil conduit is connected to the one the second ball valves 2,19 and the one the second rapid-acting coupling 1,20 respectively; At the bottom of case in casing, upper surface is also provided with low-voltage lead connection bolt 13, is provided with ground wire connection bolt 16 at the bottom of the case outside casing, is placed with insulating support 10 in casing.
Be specially:
Adopt that thick aluminium alloy plate is made at the bottom of case for 20mm, the length of side are 600mm, under case, be separately installed with can 360 degree of universal caster wheels turned in the corner in face; It is the through hole of 20mm that center at the bottom of case case has a diameter, at the bottom of case, the end of upper surface through hole is processed to the groove of diameter 40mm, degree of depth 5mm, stainless-steel tube is installed, ball valve and fast interface is housed, as the oil inlet and outlet of transformer oil at the other end of pipe; Centre position at the bottom of case case, with the center at the bottom of case case for the center of circle is processed with the ring-shaped groove that a width is 12mm, the degree of depth is 10mm, internal diameter is 458mm, external diameter is 482mm, groove internal fixtion has the O-ring seal of 8mm crude rubber material; At the screw being circumferentially dispersed with 16 M10 uniformly that ring-shaped groove overall diameter is 510mm; The main part of chamber adopts wall thickness 10mm, internal diameter is 460mm, external diameter is 480mm, highly for the epoxy tube of 425mm is made, epoxy tube lower end is processed with the external thread of high 50mm, with thickness be 40mm, internal diameter 480mm, external diameter 540mm to be fixed in the ring-shaped groove at the bottom of case by the bolt of M10 after linking together with female aluminium ring, can the closed type of warranty test system lower end; With thickness be 20mm, diameter is that the circular aluminum alloy sheets of 520mm makes upper cover, through hole duplicate with center, floor is had at the center of aluminium alloy plate, stainless-steel tube is installed, ball valve and fast interface is housed, as the air inlet/outlet of whole pilot system at the other end of pipe; With the center of upper cover for the center of circle is processed with the ring-shaped groove that a width is 12mm, the degree of depth is 10mm, internal diameter is 458mm, external diameter is 482mm, groove internal fixtion has the O-ring seal of 8mm crude rubber material; When needing to change sample, upper cover can be opened easily without when air pressure difference inside and outside chamber, and when needing to vacuumize, the deadweight of upper cover and inside and outside air pressure difference can the sealings of warranty test system upper end; Be that two pieces of epoxy plates of 5mm make by definite shape, thickness be highly the cross insulating support of 250mm, as the insulating supporting of model coil.
Total process of assembling of pilot system is as follows: castor mounting hole 23 place castor 21 being fixed on 17 lower surfaces at the bottom of case, what meet pilot system facilitates movement requirement.One end of transformer oil stainless steel pipe 18 is fixed on the corresponding mounting hole 22 place of at the bottom of case 17, be connected with ball valve 19 by the mode of screw thread at the other end of conduit 18, the other end of ball valve 19 is connected with rapid-acting coupling 20, as the access way of transformer oil.The O-ring seal 14 of quality of rubber materials to be fixed at the bottom of case on 17 in corresponding ring-shaped groove 27, after being formed parts by the external thread 30 of epoxy resin pipe 6 and the internal thread 29 of aluminium ring 15, to put at the bottom of case the mounting groove 27 on 17, in the mounting groove utilizing at the bottom of the mounting hole 28 on hexagon socket head cap screw, aluminium ring 15 and case the screw 24 on 17 to be fixed on by epoxy resin pipe 6 at the bottom of case on 17, under the effect of screw, O-ring seal 14 is compressed.One end of transformer oil stainless steel pipe 3 is fixed on the corresponding mounting hole 31 place of case lid 4, be connected with ball valve 2 by the mode of screw thread at the other end of conduit 3, the other end of ball valve 2 is connected with rapid-acting coupling 1, as the access way of air.The O-ring seal 5 of quality of rubber materials to be fixed on case lid 4 in corresponding ring-shaped groove 32, after the upper end of epoxy resin pipe 6 being put into the ring-shaped groove 32 on case lid 4, namely to constitute the chamber of whole pilot system.
Process of the test is as follows: taken off from chamber by case lid 4, model coil 9 is placed on after on insulating support 10 and puts into chamber, with lead-in wire 12 by the low-pressure line-outgoing end 11 of model coil 9 by set bolt 13 with 17 to link together at the bottom of case.Case lid 4 is covered in chamber, and the tracheae of vacuum pump is connected to rapid-acting coupling 1, opens ball valve 2, the storage tank oil-out of transformer oil 8 is connected to rapid-acting coupling 20, opens ball valve 19.After opening vacuum pump, under the effect of atmospheric pressure, transformer oil 8 flows into chamber in storage tank, after liquid level arrives certain altitude, closes ball valve 19, disconnects pipe, continue to vacuumize 10 minutes.After vacuumizing end, pilot system is pushed into pressing position, after static 10 minutes, opens the high-voltage terminal end 7 that hi-line is connected to model coil 9 by case lid, after ground wire being connected at the bottom of case bolt 25 place on 17, just can apply voltage, formally start electrical ageing test.
Claims (2)
1. the removable pilot system of transformer turn-to-turn insulation voltage ageing simulation test, it is characterized in that comprising: the casing of a band case lid, at the bottom of its case and case lid be aluminium alloy plate, tank wall is epoxy resin pipe, rubber seal is provided with at the bottom of case, between case lid and tank wall, at the bottom of case, bottom surface is provided with universal caster wheel, case lid, Xiang Di center have round tube hole, are circumscribed with stainless air conduit and transformer oil conduit respectively, and the other end of air conduit and transformer oil conduit is all connected to ball valve and rapid-acting coupling; At the bottom of case in casing, upper surface is also provided with low-voltage lead connection bolt, is provided with ground wire connection bolt, is placed with insulating support in casing at the bottom of the case outside casing.
2. the removable pilot system of transformer turn-to-turn insulation voltage ageing simulation test according to claim 1, it is characterized in that: the square aluminium alloy plate at the bottom of described case being thick 20mm, length of side 600mm, at the bottom of case, upper surface middle circle through hole is provided with the counterbore of diameter 40mm, degree of depth 5mm, upper surface at the bottom of case centered by middle circle through hole also has the ring-shaped groove that width is 12mm, the degree of depth is 10mm, internal diameter is 458mm, external diameter is 482mm, groove internal fixtion has the O-ring seal of 8mm crude rubber material, outside ring-shaped groove, be circumferentially dispersed with screw uniformly;
Described case lid is the circular aluminum alloy sheets of thickness 20mm, diameter 520mm, with the center of case lid for the center of circle is processed with the ring-shaped groove that a width is 12mm, the degree of depth is 10mm, internal diameter is 458mm, external diameter is 482mm, groove internal fixtion has the O-ring seal of 8mm crude rubber material;
Described tank wall is the epoxy resin pipe of wall thickness 10mm, internal diameter 460mm, external diameter 480mm, height 425mm, epoxy resin pipe lower end is processed with the external thread of high 50mm, with thickness be 40mm, internal diameter 480mm, external diameter 540mm to be fixed on by the bolt of M10 after linking together with female aluminium ring in the ring-shaped groove at the bottom of case.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510067253.5A CN104749499A (en) | 2015-02-09 | 2015-02-09 | Movable testing system for transformer inter-turn insulating electrical aging simulation test |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510067253.5A CN104749499A (en) | 2015-02-09 | 2015-02-09 | Movable testing system for transformer inter-turn insulating electrical aging simulation test |
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| CN104749499A true CN104749499A (en) | 2015-07-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510067253.5A Pending CN104749499A (en) | 2015-02-09 | 2015-02-09 | Movable testing system for transformer inter-turn insulating electrical aging simulation test |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105137311A (en) * | 2015-10-12 | 2015-12-09 | 哈尔滨理工大学 | Dry-type air-core reactor turn-to-turn insulation electrical aging test system and test method thereof |
| CN105865931B (en) * | 2016-04-19 | 2018-10-12 | 承德市德盛检测设备有限公司 | Super-pressure super large container constant pressure testing machine and test method |
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| CN101957423A (en) * | 2010-09-16 | 2011-01-26 | 中国电力科学研究院 | Device for testing insulating property of high-voltage oiled paper |
| CN102096032A (en) * | 2011-01-06 | 2011-06-15 | 山东电力研究院 | Experimental facility and method for electric heating combined stress aging with oil-paper insulation of transformer |
| CN202903958U (en) * | 2012-12-05 | 2013-04-24 | 哈尔滨理工大学 | An apparatus for testing characteristics of breakdowns under an oil flow of paper oil insulation of a transformer |
| CN203178415U (en) * | 2013-01-17 | 2013-09-04 | 周桂林 | Transformer testing apparatus |
| CN203909218U (en) * | 2014-03-19 | 2014-10-29 | 国家电网公司 | Device for determination of insulation characteristics of oil paper |
| CN104133165A (en) * | 2014-07-07 | 2014-11-05 | 广东电网公司电力科学研究院 | Transformer oilpaper insulation test system |
| CN204008968U (en) * | 2014-03-19 | 2014-12-10 | 国家电网公司 | A kind of test unit and pilot system thereof of measuring paper oil insulation characteristic |
| CN204536475U (en) * | 2015-02-09 | 2015-08-05 | 广东电网有限责任公司电力科学研究院 | The removable pilot system of a kind of transformer turn-to-turn insulation voltage ageing simulation test |
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2015
- 2015-02-09 CN CN201510067253.5A patent/CN104749499A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101957423A (en) * | 2010-09-16 | 2011-01-26 | 中国电力科学研究院 | Device for testing insulating property of high-voltage oiled paper |
| CN102096032A (en) * | 2011-01-06 | 2011-06-15 | 山东电力研究院 | Experimental facility and method for electric heating combined stress aging with oil-paper insulation of transformer |
| CN202903958U (en) * | 2012-12-05 | 2013-04-24 | 哈尔滨理工大学 | An apparatus for testing characteristics of breakdowns under an oil flow of paper oil insulation of a transformer |
| CN203178415U (en) * | 2013-01-17 | 2013-09-04 | 周桂林 | Transformer testing apparatus |
| CN203909218U (en) * | 2014-03-19 | 2014-10-29 | 国家电网公司 | Device for determination of insulation characteristics of oil paper |
| CN204008968U (en) * | 2014-03-19 | 2014-12-10 | 国家电网公司 | A kind of test unit and pilot system thereof of measuring paper oil insulation characteristic |
| CN104133165A (en) * | 2014-07-07 | 2014-11-05 | 广东电网公司电力科学研究院 | Transformer oilpaper insulation test system |
| CN204536475U (en) * | 2015-02-09 | 2015-08-05 | 广东电网有限责任公司电力科学研究院 | The removable pilot system of a kind of transformer turn-to-turn insulation voltage ageing simulation test |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105137311A (en) * | 2015-10-12 | 2015-12-09 | 哈尔滨理工大学 | Dry-type air-core reactor turn-to-turn insulation electrical aging test system and test method thereof |
| CN105137311B (en) * | 2015-10-12 | 2018-01-19 | 哈尔滨理工大学 | A kind of dry-type air-core reactor turn-to-turn insulation electrical ageing test system and its test method |
| CN105865931B (en) * | 2016-04-19 | 2018-10-12 | 承德市德盛检测设备有限公司 | Super-pressure super large container constant pressure testing machine and test method |
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Application publication date: 20150701 |