CN104101820A - Transformer oil/paper insulation aging experimental device and method - Google Patents
Transformer oil/paper insulation aging experimental device and method Download PDFInfo
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- CN104101820A CN104101820A CN201410341117.6A CN201410341117A CN104101820A CN 104101820 A CN104101820 A CN 104101820A CN 201410341117 A CN201410341117 A CN 201410341117A CN 104101820 A CN104101820 A CN 104101820A
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Abstract
The invention relates to a transformer oil/paper insulation aging experimental device and method. The experimental device comprises a high voltage electrode, a low voltage electrode, a seal cavity and a screening shell, the high voltage electrode and the low voltage electrode are disposed in the seal cavity, an insulation paper sample is arranged between the high voltage electrode and the low voltage electrode, the seal cavity comprises an upper seal cavity and a lower seal cavity, miniature oil injection holes and miniature oil pumping holes are formed in the upper seal cavity and the lower seal cavity, an O-shaped seal ring is arranged at the connecting position of the upper seal cavity and the lower seal cavity, the high voltage electrode is located in the upper seal cavity and provided with a first screw rod, and the low voltage electrode is located in the lower seal cavity and provided with a second screw rod. By means of the transformer oil/paper insulation aging experimental device and method, an oil/paper insulation structure required by an experiment can be adjusted according to experiment requirements, an oil sample can be directly extracted without movement of oil/paper insulation after aging is finished, and problems that oil/paper insulation aging experimental devices are complicated in structures and inconvenient to operate in the prior art can be solved.
Description
Technical field
The present invention relates to transformer technology field, particularly transformer oil/paper, specifically a kind of transformer oil/Aging of Oil-paper Insulation in Oil experimental provision and experimental technique.
Background technology
Power transformer is large oil immersed power transformer especially, one of vital equipment in electric system, the safety and stability of its operational reliability direct relation electric system, statistical data is that is, the interruption of service of transformer is mainly caused by its insulation system fault, and the operation life of transformer depends on the ageing state of oil/paper insulation system to a great extent.Therefore, the ageing state of Accurate Diagnosis oil/paper insulation system, most important to the life-span of prediction transformer, be also to realize prerequisite and the basis that transformer state is safeguarded.
In most of transformers, its insulation system three major polymers: cellulose cardboard and transformer oil form, and the former mainly plays insulation and supports, and the latter is mainly used to insulation and cooling.In transformer operational process, oil/paper insulation is born the multiple external stress effects such as heat, electricity, machinery, chemistry for a long time, under above-mentioned multiple effect of stress, cellulose cardboard and transformer oil all can be aging gradually along with the accumulation of time, and produce some ageing products, as ethene, acetylene, micro-water and furan compound etc., cause self insulation and mechanical property to decline gradually and also may cause transformer fault.Because transformer is under normal operation stress condition, oil/Aging of Oil-paper Insulation in Oil process is very slow, carry out with this understanding experimental study, time is very long and unrealistic, therefore, more under high stress level, oil/paper insulation is being carried out to the main path that accelerated deterioration experiment becomes domestic and international experts and scholars' Research on Oil/Aging of Oil-paper Insulation in Oil rule, explores aging inherent mechanism.
But be subject to many limitations in the electric power transformer insulated aging mechanism research of reality, as because structure of power transformer complexity, manufacturing cost are high, cause studying sample acquisition difficulty, and generally do not allow to change inner structure according to research purpose, therefore be badly in need of according to structure of power transformer characteristic, design the micro-simulation device that can reflect electric power transformer insulated structure, to facilitate insulation ag(e)ing theory and the study on assessing method of power transformer.
Application number is in 201110001946.6 patent documentation, disclose a kind of transformer oil/paper insulated electrothermic and combined aging experimental provision and method, this test unit comprises exocoel, the inner chamber of at least one sealing is set in exocoel, in inner chamber, be provided with proving installation, proving installation is provided with high-field electrode and low-field electrode, and sample is placed between the high-field electrode and low-field electrode of mutual compression, and high-field electrode is connected with display system with high-voltage power supply and the current measurement of exocoel outside respectively.This experimental provision complex structure, and after experiment finishes, need to open inner chamber and just can carry out the extraction of oil sample, operation inconvenience.In addition, this experimental provision is for the insulation system at a position of transformer, the position of high-field electrode, low-field electrode and sample is in place, carry out senile experiment, if need to carry out senile experiment to the insulation system at other positions of transformer, need to reopen inner chamber, reappose the position of high-field electrode, low-field electrode and sample, operating process is very complicated, increase labor capacity, if manually place not in placely, probably cause measurement result inaccurate, thereby affect the research of oil/Aging of Oil-paper Insulation in Oil rule.
Summary of the invention
The object of this invention is to provide a kind of transformer oil/Aging of Oil-paper Insulation in Oil experimental provision, this experimental provision is provided with governor motion, can be according to experiment needs, adjust testing required oil/paper insulation structure, and after aging end, without mobile oil/paper insulation, directly extract oil sample, easy to operate, in order to solve oil/Aging of Oil-paper Insulation in Oil experimental provision complex structure of the prior art, unhandy problem.
For achieving the above object, the solution of the present invention is: a kind of experimental provision for the experiment of transformer oil/Aging of Oil-paper Insulation in Oil, comprise pick-up unit, described pick-up unit comprises high-field electrode, low-field electrode, insulating paper sample and seal chamber, described high-field electrode, low-field electrode and insulating paper sample are all arranged in described seal chamber, described insulating paper sample is arranged between high-field electrode and low-field electrode, described high-field electrode is connected high-voltage power supply with low-field electrode, described experimental provision also comprises screening can, described screening can comprises shielding case and the metal top cover plate that is arranged on shielding case upper shed place under metal under the metal with upper shed, described seal chamber is positioned at screening can and metal top cover plate is fixed,
Described seal chamber comprises annular seal space and lower seal chamber, in described upper annular seal space and lower seal chamber, be provided with miniature oil hole and miniature oil pumping hole, upper annular seal space and lower seal chamber are opening box-structure, the opening part in upper annular seal space and lower seal chamber is oppositely arranged, the opening part of upper annular seal space is provided with an O RunddichtringO, the opening part in lower seal chamber is provided with the 2nd O RunddichtringO, and described insulating paper sample is between the first O RunddichtringO and the 2nd O RunddichtringO;
Described high-field electrode is positioned at annular seal space, be connected with the first screw mandrel for regulating distance between insulating paper sample and high-field electrode, described low-field electrode is positioned at lower seal chamber, be connected with the second screw mandrel for regulating distance between insulating paper sample and low-field electrode, described high-field electrode is fixed through upper annular seal space and upper annular seal space by the first screw mandrel machine, and described low-field electrode is fixed through lower seal chamber and lower seal chamber by the second screw mandrel.
According to experimental provision of the present invention, described seal chamber is fixed on metal top cover plate by the first tetrafluoroethene screw rod, the second tetrafluoroethene screw rod and the first spacing tetrafluoroethene post, the second spacing tetrafluoroethene post, one side in upper annular seal space and lower seal chamber is provided with the through hole coordinating with the first tetrafluoroethene screw rod, and the opposite side in upper annular seal space and lower seal chamber is provided with the through hole coordinating with the second tetrafluoroethene screw rod;
On described metal top cover plate, be provided with the screw coordinating with the first tetrafluoroethene screw rod, the second tetrafluoroethene screw rod, one end of the first tetrafluoroethene screw rod, the second tetrafluoroethene screw rod is fixed by the screw on metal top cover plate and metal top cover plate, the other end of the first tetrafluoroethene screw rod screws in the first spacing tetrafluoroethene post, and fixes by the first insulation clamp nut after through hole through upper annular seal space and lower seal chamber one side; The other end of the second tetrafluoroethene screw rod screws in the second spacing tetrafluoroethene post, and fixes by the second insulation clamp nut after through hole through upper annular seal space and lower seal chamber opposite side.
According to experimental provision of the present invention, the interface in the interface of described the first screw mandrel and upper annular seal space and the second screw mandrel and lower seal chamber is provided with sealing gasket, and fixes by metal clamp nut respectively, prevents draining.
According to experimental provision of the present invention, this experimental provision is provided with high-field electrode lead end and low-field electrode lead end, described high-field electrode lead end is tetrafluoroethene insulating sleeve, described low-field electrode lead end is BNC connector, described tetrafluoroethene insulation tube and BNC connector are all arranged on metal top cover plate, described high-field electrode is through the high-voltage output end that is connected in the high-voltage power supply of screening can outside after tetrafluoroethene insulating sleeve, described low-field electrode connects BNC connector by copper conductor, and be connected in the low-voltage output of the high-voltage power supply of screening can outside by BNC connector.
According to experimental provision of the present invention, under described metal top cover plate and metal, on shielding case, be provided with the locating slot that cooperatively interacts and install, under metal top cover plate and metal, shielding case is fixed by described locating slot.
The object of this invention is to provide a kind of transformer oil/Aging of Oil-paper Insulation in Oil experimental technique, this experimental technique can be according to experiment needs, adjust testing required oil/paper insulation structure, and after aging end, without mobile oil/paper insulation, directly extract oil sample, easy to operate, in order to solve the unhandy problem of oil/Aging of Oil-paper Insulation in Oil experimental technique of the prior art.
For achieving the above object, the solution of the present invention is: a kind of transformer oil/Aging of Oil-paper Insulation in Oil experimental technique, comprises the steps:
(1) high-field electrode is fixed by the first screw mandrel and upper annular seal space, low-field electrode is fixed by the second screw mandrel and lower seal chamber;
(2) the 2nd O RunddichtringO is positioned over to the opening part in lower seal chamber, and insulating paper sample is cut into suitable size and is placed on the 2nd O RunddichtringO;
(3) an O RunddichtringO is placed on described insulating paper sample, and upper annular seal space is positioned on an O RunddichtringO, adjust position simultaneously and make the opening of annular seal space coordinate and be in place with a described O RunddichtringO;
(4) by the upper metal cover board fixed installation of seal chamber and screening can;
(5) by the distance of the first screw mandrel adjustment high-field electrode and insulating paper sample, adjust the distance of low-field electrode and insulating paper sample by the second screw mandrel, realize the required oil/paper insulation structure of experiment;
(6) be injected into respectively in upper annular seal space and lower seal chamber with syringe arranges transformer oil miniature oil hole by upper annular seal space and lower seal chamber, and unnecessary transformer oil after gushing by miniature oil pumping hole after filling;
(7) under metal, shielding case is poured transformer oil into, as the aging protective medium of high-tension electricity, suppresses when high pressure is aging to prolong face electric discharge, then the metal top cover plate that fixes pick-up unit is put into shielding case under metal;
(8) high-field electrode is connected with the high-voltage power supply that is arranged at screening can outside with low-field electrode, carries out transformer oil/paper accelerated deterioration experiment;
(9) take off metal top cover plate, extract the oil sample after aging by miniature oil pumping hole with syringe, then extract insulating paper sample and carry out physical and chemical parameter analysis, draw the aging rule of insulating paper sample.
According to experimental technique of the present invention, in described step (4), by the first tetrafluoroethene screw rod, the second tetrafluoroethene screw rod and the first spacing tetrafluoroethene post, the second spacing tetrafluoroethene post, seal chamber is fixed on metal top cover plate, one side in upper annular seal space and lower seal chamber is provided with the through hole coordinating with the first tetrafluoroethene screw rod, and the opposite side in upper annular seal space and lower seal chamber is provided with the through hole coordinating with the second tetrafluoroethene screw rod;
On described metal top cover plate, be provided with the screw coordinating with the first tetrafluoroethene screw rod, the second tetrafluoroethene screw rod, one end of the first tetrafluoroethene screw rod, the second tetrafluoroethene screw rod is fixed by the screw on metal top cover plate and metal top cover plate, the other end of the first tetrafluoroethene screw rod screws in the first spacing tetrafluoroethene post, and fixes by the first insulation clamp nut after through hole through upper annular seal space and lower seal chamber one side; The other end of the second tetrafluoroethene screw rod screws in the second spacing tetrafluoroethene post, and fixes by the second insulation clamp nut after through hole through upper annular seal space and lower seal chamber opposite side.
According to experimental technique of the present invention, in described step (6), before oiling, on passing, on first screw mandrel in annular seal space and lower seal chamber and the second screw mandrel, be inserted in sealing gasket respectively, and fix with metal clamp nut, in case leak-stopping oil.
According to experimental technique of the present invention, in described step (8), BNC connector and tetrafluoroethene insulating sleeve are installed on metal top cover plate, described high-field electrode connects the high-voltage output end of high-voltage power supply through tetrafluoroethene insulating sleeve, low-field electrode connects BNC connector by copper conductor, then connects the low-voltage output of high-voltage power supply by BAC joint.
According to experimental technique of the present invention, after being included in senile experiment and finishing, take off high-voltage power supply, the high-field electrode that penetrates tetrafluoroethene insulating sleeve be connected the BNC connector of low-field electrode on connect reometer, be used for measuring lax electric current, to assess its state of insulation.
The beneficial effect that the present invention reaches:
(1) experimental provision is applicable to transformer oil/Aging of Oil-paper Insulation in Oil, and can after aging, not move under oil/paper insulated prerequisite and directly carry out oil sample extraction;
(2) in experimental provision, be provided with first, second screw structure, oil/paper insulation structure is for can adjusting according to research, with the insulation system of research power transformer different parts, as transformer oil reservoir/insulating paper/transformer oil reservoir insulation system is set, and the thickness of transformer oil reservoir also can regulate by screw mandrel;
(3) the present invention is placed in transformer oil/paper insulation structure the micro sealing cavity of certain sealing, prevent the diffusion of micro-characteristic gas in ageing process, characteristic gas content, furfural content isoconcentration after insulation ag(e)ing in transformer oil and insulating paper are high, when having overcome actual power transformer and measuring, because oil chamber volume is large, transformer oil mass is many and by the problems of the dilutions such as characteristic gas;
(4) in experimental provision of the present invention, be provided with high-field electrode lead end and low-field electrode lead end, can be used for oily/paper insulated aging, also can be used for oil/paper insulated lax current measurement, lax electric current and transformer oil/paper insulation performance have physical interconnection, can obtain insulation characterisitic parameter based on relevant dielectric Theory, so that based on electric current Relaxation Theory assessment oil/paper insulation state, react the overall good level of the every insulating property parameter of insulating material by state of insulation.
Brief description of the drawings
Fig. 1 is the structural representation of experimental provision of the present invention;
Fig. 2 is experimental technique process flow diagram of the present invention.
Wherein,
1-metal top cover plate 14-the first metal clamp nut
The miniature oil hole of shielding case 15-first under 2-metal
3-tetrafluoroethene insulating sleeve 16-high-field electrode
4-BNC joint 17-the first miniature oil pumping hole
The spacing tetrafluoroethene post of 5-first 18-the one O RunddichtringO
The spacing tetrafluoroethene post of 6-second 19-insulating paper sample
7-first clamp nut 20-the 2nd O RunddichtringO that insulate
The 8-second miniature oil hole of clamp nut 21-second that insulate
9-first tetrafluoroethene screw rod 22-the second miniature oil pumping hole
10-the second tetrafluoroethene screw rod 23-low-field electrode
11-copper conductor 24-lower seal chamber
Upper annular seal space 25-the second sealing gasket of 12-
13-first sealing gasket 26-the second metal clamp nut
Embodiment
Below in conjunction with accompanying drawing, the present invention is further detailed explanation.
Experimental provision embodiment of the present invention:
As shown in Figure 1, the experimental provision of the present embodiment comprises screening can and the pick-up unit that is positioned at screening can.Screening can comprises shielding case 2 under metal top cover plate 1 and metal, under metal, shielding case 2 is body structures with upper shed, metal top cover plate 1 is arranged on upper shed place of shielding case 2 under metal, under metal top cover plate 1 and metal, the installation junction of shielding case 2 is provided with locating slot, with anti-slip.High-field electrode lead end for drawing high-field electrode is installed on upper metal cover board 1---tetrafluoroethene insulating sleeve 3 and for drawing the low-field electrode lead end of low-field electrode---BNC (Bayonet Nut Connector, bayonet nut connector) joint 4.
Pick-up unit comprises high-field electrode 16, low-field electrode 23, insulating paper sample 19, upper annular seal space 12 and lower seal chamber 24, upper annular seal space 12 and lower seal chamber 24 are opening box-structure, the opening part of upper annular seal space 12 is provided with an O RunddichtringO 18, the opening part in lower seal chamber 24 is provided with the 2nd O O-ring seal 20, the opening part in upper annular seal space 12 and lower seal chamber 24 is provided with draw-in groove, the one O RunddichtringO 18 and the 2nd O O-ring seal 20 lay respectively in corresponding draw-in groove, the opening in upper annular seal space 12 and lower seal chamber 24 is oppositely arranged, form a seal chamber.Wherein, in upper annular seal space 12, be provided with the first miniature oil hole 15 and the first miniature oil pumping hole 17, in lower seal chamber 24, be provided with the second miniature oil hole 21 and the second miniature oil pumping hole 22, the diameter in the first miniature oil hole 15, the first miniature oil pumping hole 17, the second miniature oil hole 21 and the second miniature oil pumping hole 22 that the present embodiment arranges is between 2-3mm.
Insulating paper sample 19 is between the first O RunddichtringO and the 2nd O RunddichtringO, high-field electrode 16 is positioned at annular seal space 12, low-field electrode 23 is positioned at lower seal chamber 24, high-field electrode 16 is connected with the first screw mandrel, low-field electrode 23 is connected with the second screw mandrel, can adjust the distance of electrode high-field electrode 16, low-field electrode 23 and insulating paper sample 19 by the first screw mandrel and the second screw mandrel, realize the required oil/paper insulation structure of experiment.The first screw mandrel being connected with high-field electrode 16 passes the bottom of upper annular seal space 12, and the first sealing gasket 13 is enclosed within on the first screw mandrel, is then fixed with the first metal clamp nut 14, realizes the fixing of high-field electrode 16 and upper annular seal space 12.The second screw mandrel being connected with low-field electrode 23 passes the bottom in lower seal chamber 24, and the second sealing gasket 25 is enclosed within on the second screw mandrel, is then fixed with the second metal clamp nut 26, realizes the fixing of low-field electrode 23 and lower seal chamber 24.High-field electrode penetrates the high-voltage output end of the rear connection high-voltage power supply of tetrafluoroethene insulating sleeve 3, and low-field electrode 23 connects BNC connector by copper conductor 11, and connects the low-voltage output of high-voltage power supply by BNC connector.
Upper annular seal space 12 and lower seal chamber 24 are fixing with metal top cover plate 1 by the first spacing tetrafluoroethene post 5, the second spacing tetrafluoroethene post 6, the first tetrafluoroethene screw rod 9 and the second tetrafluoroethene screw rod 10, upper annular seal space 12 and lower seal chamber 24 1 sides vertically offer the through hole coordinating with the first tetrafluoroethene screw rod 9, and upper annular seal space 12 and lower seal chamber 24 opposite sides vertically offer the through hole coordinating with the second tetrafluoroethene screw rod 10.On metal top cover plate 1, offer two screws that coordinate with the first tetrafluoroethene screw rod 9, the second tetrafluoroethene screw rod 10, one end of the first tetrafluoroethene screw rod 9 and the second tetrafluoroethene screw rod 10 is fixed by described two screws and metal top cover plate.The other end of the first tetrafluoroethene screw rod 9 is through after the first spacing tetrafluoroethene post 5, in insertion in the through hole of annular seal space 12 and lower seal chamber 24 1 sides, and is fixed by the first insulation clamp nut 7.The other end of the second tetrafluoroethene screw rod 10 is through after the second spacing tetrafluoroethene post 6, in insertion in the through hole of annular seal space 12 and lower seal chamber 24 opposite sides, and is fixed by the second insulation clamp nut 8.
The detailed process that the experimental provision of employing the present embodiment carries out senile experiment is as follows:
(1) high-field electrode 16 and low-field electrode 23 are separately fixed to upper annular seal space 12 and lower seal chamber 24.
(2) the 2nd O RunddichtringO 20 is placed in the draw-in groove in lower seal chamber 24, then insulating paper sample 19 is cut into suitable dimension and is placed on the 2nd O RunddichtringO 20.
(3) an O RunddichtringO 18 is placed on insulating paper sample 19, upper annular seal space 12 is placed in to an O RunddichtringO 18, adjust position and snap in the draw-in groove of upper annular seal space 12 to realize O RunddichtringO 18.
(4) the first tetrafluoroethene screw rod 9 and the second tetrafluoroethene screw rod 10 are screwed in the screw of metal top cover plate 1, then are screwed into respectively the first spacing tetrafluoroethene post 5 and the second spacing tetrafluoroethene post 6.
(5) the first tetrafluoroethene screw rod 9 and the second tetrafluoroethene screw rod 10 are inserted respectively to annular seal space 12 and lower seal chamber 24, and fixing with the first insulation clamp nut 7 and the second insulation clamp nut 8, wherein high-field electrode 16 is by tetrafluoroethene insulating sleeve 3 penetrating metal upper cover plates 1.
(6) distance with insulating paper sample 19 by the first screw mandrel adjustment high-field electrode 16, the distance by the second screw mandrel adjustment low-field electrode 23 with insulating paper sample 19, realizes and tests required oil/paper insulation structure.
(7) the first sealing gasket 13, the second sealing gasket 25 are inserted in respectively to the first screw mandrel and the second screw mandrel, and fixing with the first metal clamp nut 14 and the second holding screw 26 respectively, in case draining.
(8) connect low pressure bottom electrode 23 and BNC connector 4 with copper conductor 11.
(9) transformer oil is passed through to the first miniature oil hole 15, the second miniature oil hole 21 with syringe, be injected into respectively annular seal space 12 and lower seal chamber 24, after filling, release unnecessary oil by the first miniature oil pumping hole 17, the second miniature oil pumping hole 22.
(10) under metal, shielding case 2 is poured transformer oil into, as the aging protective medium of high-tension electricity, suppresses when high pressure is aging to prolong face electric discharge, then the metal top cover plate 1 that fixes pick-up unit is put into shielding case 2 under metal.Wherein, when the transformer oil mass of pouring shielding case 2 under metal into should ensure that metal upper cover plate 2 is placed under metal shielding case 2, the pasta under metal in shielding case 2 is higher than upper annular seal space upper level.
(11) the high-field electrode 16 that penetrates tetrafluoroethene insulating sleeve 3 be connected the BNC connector of low-field electrode on be connected respectively high-voltage output end and the low-voltage output of high-voltage power supply, carry out transformer oil/paper accelerated deterioration experiment.
(12) after aging end, the high-field electrode 16 that penetrates tetrafluoroethene insulating sleeve 3 be connected the BNC connector of low-field electrode 23 on reometer in succession, measure lax electric current.
(13) after lax current measurement finishes, take off metal top cover plate (1), extract the oil sample after aging by the first miniature oil pumping hole 15, the second miniature oil pumping hole 21 use syringes, then extract insulating paper sample and carry out physical and chemical parameter analysis, draw the aging rule of insulating paper sample.
Experimental technique embodiment of the present invention:
The experimental provision that the present embodiment adopts is as described in said apparatus embodiment, and specific implementation process is identical with said apparatus embodiment, does not repeat them here.
In experimental provision of the present invention, be provided with high-field electrode lead end and low-field electrode lead end, can be used for oil/paper insulated aging, also can be used for oil/paper insulated lax current measurement, so that based on electric current Relaxation Theory assessment oil/paper insulation state.In experimental provision, be provided with governor motion, realize the adjustment of transformer oil/paper insulation structure, to be applicable to research needs, wherein the thickness of transformer oil reservoir can pass through the first screw mandrel, the second screw mandrel regulates.Transformer oil/paper insulation structure is placed in the seal chamber of certain sealing, prevents the diffusion of micro-characteristic gas in ageing process, and is provided with take out/oil hole, to realize taking out, noting of transformer oil sample, is convenient to the detection of characteristic gas etc.
Claims (10)
1. transformer oil/Aging of Oil-paper Insulation in Oil experimental provision, comprise pick-up unit, described pick-up unit comprises high-field electrode, low-field electrode, insulating paper sample and seal chamber, described high-field electrode, low-field electrode and insulating paper sample is all arranged in described seal chamber, described insulating paper sample is arranged between high-field electrode and low-field electrode, described high-field electrode is connected high-voltage power supply with low-field electrode, it is characterized in that:
Described experimental provision also comprises screening can, and described screening can comprises shielding case and the metal top cover plate that is arranged on shielding case upper shed place under metal under the metal with upper shed, and described seal chamber is positioned at screening can and metal top cover plate is fixed;
Described seal chamber comprises annular seal space and lower seal chamber, in described upper annular seal space and lower seal chamber, be provided with miniature oil hole and miniature oil pumping hole, upper annular seal space and lower seal chamber are opening box-structure, the opening part in upper annular seal space and lower seal chamber is oppositely arranged, the opening part of upper annular seal space is provided with an O RunddichtringO, the opening part in lower seal chamber is provided with the 2nd O RunddichtringO, and described insulating paper sample is between the first O RunddichtringO and the 2nd O RunddichtringO;
Described high-field electrode is positioned at annular seal space, on high-field electrode, be provided with the first screw mandrel for regulating distance between insulating paper sample and high-field electrode, described low-field electrode is positioned at lower seal chamber, on low-field electrode, be provided with the second screw mandrel for regulating distance between insulating paper sample and low-field electrode, described high-field electrode is fixed through upper annular seal space and upper annular seal space by the first screw mandrel machine, and described low-field electrode is fixed through lower seal chamber and lower seal chamber by the second screw mandrel.
2. transformer oil/Aging of Oil-paper Insulation in Oil experimental provision according to claim 1, it is characterized in that described seal chamber is fixed on metal top cover plate by the first tetrafluoroethene screw rod, the second tetrafluoroethene screw rod and the first spacing tetrafluoroethene post, the second spacing tetrafluoroethene post, one side in upper annular seal space and lower seal chamber is provided with the through hole coordinating with the first tetrafluoroethene screw rod, and the opposite side in upper annular seal space and lower seal chamber is provided with the through hole coordinating with the second tetrafluoroethene screw rod;
On described metal top cover plate, be provided with the screw coordinating with the first tetrafluoroethene screw rod, the second tetrafluoroethene screw rod, one end of the first tetrafluoroethene screw rod, the second tetrafluoroethene screw rod is fixed by the screw on metal top cover plate and metal top cover plate, the other end of the first tetrafluoroethene screw rod screws in the first spacing tetrafluoroethene post, and fixes by the first insulation clamp nut after through hole through upper annular seal space and lower seal chamber one side; The other end of the second tetrafluoroethene screw rod screws in the second spacing tetrafluoroethene post, and fixes by the second insulation clamp nut after through hole through upper annular seal space and lower seal chamber opposite side.
3. transformer oil/Aging of Oil-paper Insulation in Oil experimental provision according to claim 1, it is characterized in that the interface of described the first screw mandrel and upper annular seal space and the interface in the second screw mandrel and lower seal chamber are provided with sealing gasket, and fix by metal clamp nut respectively, prevent draining.
4. transformer oil/Aging of Oil-paper Insulation in Oil experimental provision according to claim 1, it is characterized in that described experimental provision is provided with high-field electrode lead end and low-field electrode lead end, described high-field electrode lead end is tetrafluoroethene insulating sleeve, described low-field electrode lead end is BNC connector, described tetrafluoroethene insulation tube and BNC connector are all arranged on metal top cover plate, described high-field electrode is through the high-voltage output end that is connected in the high-voltage power supply of screening can outside after tetrafluoroethene insulating sleeve, described low-field electrode connects BNC connector by copper conductor, and be connected in the low-voltage output of the high-voltage power supply of screening can outside by BNC connector.
5. transformer oil/Aging of Oil-paper Insulation in Oil experimental provision according to claim 1, it is characterized in that the interface of shielding case under described metal top cover plate and metal, be provided with the locating slot that cooperatively interacts and install, under metal top cover plate and metal, shielding case is fixed by described locating slot.
6. adopt transformer oil/Aging of Oil-paper Insulation in Oil experimental technique of experimental provision as claimed in claim 1, it is characterized in that comprising the steps:
(1) high-field electrode is fixed by the first screw mandrel and upper annular seal space, low-field electrode is fixed by the second screw mandrel and lower seal chamber;
(2) the 2nd O RunddichtringO is positioned over to the opening part in lower seal chamber, and insulating paper sample is cut into suitable size, and be placed on the 2nd O RunddichtringO, the size of described insulating paper sample is less than the external diameter of an O RunddichtringO, the 2nd O RunddichtringO;
(3) an O RunddichtringO is placed on described insulating paper sample, and upper annular seal space is positioned on an O RunddichtringO, adjust position simultaneously and make the opening of annular seal space coordinate and be in place with a described O RunddichtringO;
(4) by the upper metal cover board fixed installation of seal chamber and screening can;
(5) by the distance of the first screw mandrel adjustment high-field electrode and insulating paper sample, adjust the distance of low-field electrode and insulating paper sample by the second screw mandrel, realize the required oil/paper insulation structure of experiment;
(6) be injected into respectively in upper annular seal space and lower seal chamber with syringe arranges transformer oil miniature oil hole by upper annular seal space and lower seal chamber, and gush unnecessary transformer oil by miniature oil pumping hole after filling;
(7) under metal, shielding case is poured transformer oil into, as the aging protective medium of high-tension electricity, suppresses when high pressure is aging to prolong face electric discharge, then the metal top cover plate that fixes pick-up unit is put into shielding case under metal;
(8) high-field electrode is connected with the high-voltage power supply that is arranged on screening can outside with low-field electrode, carries out transformer oil/paper accelerated deterioration experiment;
(9) take off metal top cover plate, extract the oil sample after aging by miniature oil pumping hole with syringe, then extract insulating paper sample and carry out physical and chemical parameter analysis, draw the aging rule of insulating paper sample.
7. experimental technique according to claim 6, it is characterized in that in described step (4), by the first tetrafluoroethene screw rod, the second tetrafluoroethene screw rod and the first spacing tetrafluoroethene post, the second spacing tetrafluoroethene post, seal chamber is fixed on metal top cover plate, one side in upper annular seal space and lower seal chamber is provided with the through hole coordinating with the first tetrafluoroethene screw rod, and the opposite side in upper annular seal space and lower seal chamber is provided with the through hole coordinating with the second tetrafluoroethene screw rod;
On described metal top cover plate, be provided with the screw coordinating with the first tetrafluoroethene screw rod, the second tetrafluoroethene screw rod, one end of the first tetrafluoroethene screw rod, the second tetrafluoroethene screw rod is fixed by the screw on metal top cover plate and metal top cover plate, the other end of the first tetrafluoroethene screw rod screws in the first spacing tetrafluoroethene post, and fixes by the first insulation clamp nut after through hole through upper annular seal space and lower seal chamber one side; The other end of the second tetrafluoroethene screw rod screws in the second spacing tetrafluoroethene post, and fixes by the second insulation clamp nut after through hole through upper annular seal space and lower seal chamber opposite side.
8. experimental technique according to claim 6, it is characterized in that, in described step (6), before oiling, on passing, on first screw mandrel in annular seal space and lower seal chamber and the second screw mandrel, being inserted in sealing gasket respectively, and fix with metal clamp nut, in case leak-stopping oil.
9. experimental technique according to claim 6, it is characterized in that in described step (8), BNC connector and tetrafluoroethene insulating sleeve are installed on metal top cover plate, described high-field electrode connects the high-voltage output end of high-voltage power supply through tetrafluoroethene insulating sleeve, low-field electrode connects BNC connector by copper conductor, then connects the low-voltage output of high-voltage power supply by BAC joint.
10. experimental technique according to claim 9, after it is characterized in that this experimental technique is included in senile experiment and finishes, take off high-voltage power supply, the high-field electrode that penetrates tetrafluoroethene insulating sleeve be connected the BNC connector of low-field electrode on connect reometer, be used for measuring lax electric current, to assess its state of insulation.
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