CN103105568B - Aging and the local discharge integrated experimental provision of transformer oil paper insulated electrothermic associating - Google Patents
Aging and the local discharge integrated experimental provision of transformer oil paper insulated electrothermic associating Download PDFInfo
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- CN103105568B CN103105568B CN201310016098.5A CN201310016098A CN103105568B CN 103105568 B CN103105568 B CN 103105568B CN 201310016098 A CN201310016098 A CN 201310016098A CN 103105568 B CN103105568 B CN 103105568B
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Abstract
The present invention devises the aging and local discharge integrated experimental provision of a kind of transformer oil paper insulated electrothermic associating, and provides corresponding test method.Experimental provision comprises high-pressure section, low-pressure section and sealable tank part.This device can provide electric heating to combine aging and partial discharge test platform for transformer oil paper insulation defect model.Device can provide the test of corona discharge in oil, creeping discharge and bubble-discharge model.Experimental provision has good impermeability, can completely cut off the impact of outside air etc.Whole system self does not produce shelf depreciation, and device can not the impurity such as the office's of having an impact corrosion of putting, and can ensure the reliability of local discharge test.Apparatus structure is simple, easy to operate, can obtain good test effect.
Description
Technical field
The present invention relates to insulation of electrical installation on-line monitoring and fault diagnosis field, particularly a kind of transformer oil paper insulated electrothermic aging and local discharge integrated experimental provision of associating and test method.
Background technology
The major accident of transformer can interrupt electric power supply, causes huge economic loss, and the transformer fault caused by interior Insulation Problems occupies pith.Transformer oil and oil-impregnated paper insulation are the chief components of insulation in transformer, both are subject to electricity, heat, machinery and the factor such as chemical in During Process of Long-term Operation affects and occurs aging, cause transformer insulated hydraulic performance decline, even cause transformer major insulation or minor insulation fault.
In order to study the aging rule of transformer Oil-Paper Insulation, the normal method of accelerated aging test that adopts is studied at present.But the acceleration heat ageing under common mainly excessive temperature and the acceleration voltage ageing under higher electric field, but under physical condition, paper oil insulation bears electric stress and thermal stress simultaneously, therefore the aging service condition simulating real transformer better of electric heating associating is carried out to transformer Oil-Paper Insulation, than the aging test under simple stress more science with rationally.
Chemical diagnosis is the main method of at present both at home and abroad assessment oil paper insulation ageing state, comprises that furans (Furan) derivative content in dissolved gas analysis (DGA), oil detects, degree of polymerization DP and tensile strength TS measures, acid number and micro-water gaging etc. in oil.But these methods all exist certain deficiency: it is aging that the oil dissolved gas of DGA not only can derive from paper, oil also can produce various gas in ageing process; Furan derivatives is the special outcome in cellulose ageing process, but its concentration can be subject to the impact of thermosyphon and oil strain; DP and TS need off-line hang cover measure, and get paper position difference obtain result difference larger; In oil, acid number and micro-water content have important impact to ageing process, but and do not have obvious correlativity between ageing state.Therefore, the inherent shortcoming of traditional diagnosis method makes it no longer practical, and the fast development of electric system then can overcome the online evaluation method of the Research on Power Transformer Oil-paper Insulation ageing state of traditional chemical routes deficiency in the urgent need to research.And shelf depreciation is a kind of harmless on-line monitoring, multinomial result of study both domestic and external shows that some characteristic quantity of shelf depreciation can reflect the insulation characterisitic of different ageing step to a certain extent.
Summary of the invention
In view of this, technical matters to be solved by this invention is to provide a kind of transformer oil paper insulated electrothermic aging and local discharge integrated experimental provision of associating and test method.
An object of the present invention proposes the aging and local discharge integrated experimental provision of a kind of transformer oil paper insulated electrothermic associating; Two of object of the present invention proposes the aging and local discharge integrated test method of a kind of transformer oil paper insulation defect model electric heating associating.
An object of the present invention is achieved through the following technical solutions:
Aging and the local discharge integrated experimental provision of a kind of transformer oil paper insulated electrothermic associating provided by the invention, comprises high-pressure section, low-pressure section and sealable tank part;
Described high-pressure section, for providing high-voltage power supply and high-field electrode;
Described sealable tank part, for providing container that is aging and shelf depreciation, and ensures impermeability;
Described low-pressure section, for providing the placement platform of low-field electrode and oilpaper defect model.
Further, described sealable tank part comprises sealed shell of tank, gland bonnet, sealing gasket and holding screw;
Be provided with sealing gasket between described sealed shell of tank and gland bonnet, be provided with for fastening screw between described sealed shell of tank and gland bonnet; Described low-pressure section is arranged at sealed shell of tank inside;
Described high-pressure section runs through and is arranged at gland bonnet central authorities, and it is inner close with low-pressure section that described high-pressure section one end is placed in sealed shell of tank, and the other end is exposed to sealed shell of tank outside.
Further, described high-pressure section comprises high-pressure conduit, high-field electrode bar, high-field electrode, the anti-corona cover of high pressure;
Described high-pressure conduit runs through and is arranged at high pressure and covers, described high-field electrode bar runs through and is arranged at high-pressure conduit inside, one end that described high-field electrode bar is exposed to pressure pan external body is provided with the anti-corona cover of high pressure, and one end that described high-field electrode bar stretches into high pressure tank interior is provided with high-field electrode.
Further, described low-pressure section comprises low pressure plate electrode, cardboard fixed support, plate electrode fixed screw, cardboard and cardboard pressure strip; Described cardboard fixed support is arranged in high pressure inner tank wall, and described cardboard fixed support is provided with low pressure plate electrode; Described cardboard fixed support is connected with high pressure tank body by plate electrode fixed screw, and described cardboard is arranged at above low pressure plate electrode, and described cardboard is also provided with cardboard pressure strip; The extreme low pressure plate electrode near low-pressure section of high-tension electricity of described high-pressure section.
Further, described high-field electrode is the one in high voltage needle electrode, post electrode or the ball electrode done by copper; Described high-field electrode adopts epoxide-resin glue to seal between contacting with high-pressure conduit.
Further, described high-pressure conduit and gland bonnet contact position tapered, and to screw with conduit holding screw; Waterline groove is carved with in the position sealed between described gland bonnet and sealed shell of tank.
Further, screw thread installation and removal can be passed through between described high-field electrode and high-field electrode bar.
Further, described high pressure tank body is also provided with gas valve.
Two of object of the present invention is achieved through the following technical solutions:
Aging and the local discharge integrated test method of a kind of transformer oil paper insulation defect model electric heating associating provided by the invention, comprises the following steps:
S1: dry transformer oil and insulating paper;
S2: oil good for pre-service is put into electric heating with oilpaper and combines aging equipment, the oil groove this device being put into constant temperature carries out oil bath;
S3: connecting circuit, applies high pressure to aging equipment, carries out electric heating associating burn-in test.
Further, in described step S1, dry run is specific as follows: first by paper in 90 DEG C/50Pa environment dry 48 hours, then paper is put into oil dry 48 hours of 90 DEG C/50Pa environment;
In described step S2, oil bath process is specific as follows: first poured into by the oil that pre-service is good in electric heating associating aging equipment, cardboard is placed on above low pressure plate electrode, cover gland bonnet, screw holding screw, gas valve is utilized to vacuumize device and pass into nitrogen, then the oil groove whole device being put into constant temperature carries out oil bath, controls the position of height to gas valve of the oil in oil groove, and the effect of device being put into oil groove is the constant of guarantee thermal aging temperature;
In described step S3, electric heating associating burn-in test process is specific as follows: first connecting circuit, then high pressure is applied to aging equipment, gather the voltage of shelf depreciation, to be dischargedly stablize and after carrying out operating frequency phase correction, finally utilize digital oscilloscope to each test product collection shelf depreciation raw data.
The invention has the advantages that: the invention provides a kind of transformer oil paper insulated electrothermic aging and local discharge integrated experimental provision of associating and corresponding test method.This device can provide electric heating to combine aging and partial discharge test platform for transformer oil paper insulation defect model.Device can provide the test of corona discharge in oil, creeping discharge and bubble-discharge model.Experimental provision has good impermeability, can completely cut off the impact of outside air etc.Whole system self does not produce shelf depreciation, and device can not the impurity such as the office's of having an impact corrosion of putting, and can ensure the reliability of local discharge test.Apparatus structure is simple, easy to operate, can obtain good test effect.The advantage of this device is specific as follows:
1. can carry out electric heating associating to paper oil insulation defect model aging, and the local discharge signal of defect model in ageing process be tested simultaneously;
2. impermeability is good, can completely cut off the impact of moisture etc. in outside air, and the infiltration of oil when can prevent oil bath;
3. high-pressure conduit can bear high voltage, and whole system can bear 30kV voltage; Whole system is without office's place system, when there is no insulation defect, system does not have the shelf depreciation such as corona to produce when bearing high pressure, the local discharge signal therefore recorded all derives from the defect of paper oil insulation, collection to local discharge signal there is reliability;
4. the material that whole tank body adopts is stainless steel, not easily produces corrosion, thus can not bring the impurity such as corrosion by oil supply paper system;
5. device can realize the test of polytype discharge defect model, comprises corona discharge in oil, creeping discharge and bubble-discharge model.
Other advantage of the present invention, target and feature will be set forth to a certain extent in the following description, and to a certain extent, based on will be apparent to those skilled in the art to investigating hereafter, or can be instructed from the practice of the present invention.The objects and other advantages of the present invention can be realized by structure specifically noted in instructions below and accompanying drawing and be obtained.
Accompanying drawing explanation
In order to make the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, the present invention is described in further detail, wherein:
Fig. 1 is transformer oil paper insulated electrothermic associating ageing test apparatus;
Fig. 2 is high voltage needle electrode/post electrode/ball electrode;
Fig. 3 is gland bonnet and waterline groove thereof;
Fig. 4 is the wiring of local discharge test platform;
Fig. 5 is corona discharge defect model electric heating associating aging equipment;
Fig. 6 is the PRPD collection of illustrative plates of the aging lower 24kV corona discharge of electric heating associating;
Fig. 7 is creeping discharge defect model electric heating associating aging equipment;
Fig. 8 is the PRPD collection of illustrative plates of the aging lower 23kV creeping discharge of electric heating associating;
Fig. 9 is bubble-discharge defect model electric heating associating aging equipment;
Figure 10 is the PRPD collection of illustrative plates of the aging lower 7kV bubble-discharge of electric heating associating.
Embodiment
Below with reference to accompanying drawing, the preferred embodiments of the present invention are described in detail; Should be appreciated that preferred embodiment only in order to the present invention is described, instead of in order to limit the scope of the invention.
Embodiment 1
Fig. 1 is transformer oil paper insulated electrothermic associating ageing test apparatus; Fig. 2 is high voltage needle electrode/post electrode/ball electrode; Fig. 3 is gland bonnet and waterline groove thereof; Fig. 4 is the wiring of local discharge test platform; Fig. 5 is corona discharge defect model electric heating associating aging equipment; Fig. 6 is the PRPD collection of illustrative plates of the aging lower 24kV corona discharge of electric heating associating; Fig. 7 is creeping discharge defect model electric heating associating aging equipment; Fig. 8 is the PRPD collection of illustrative plates of the aging lower 23kV creeping discharge of electric heating associating; Fig. 9 is bubble-discharge defect model electric heating associating aging equipment; Figure 10 is the PRPD collection of illustrative plates of the aging lower 7kV bubble-discharge of electric heating associating, as shown in the figure: the aging and local discharge integrated experimental provision of a kind of transformer oil paper insulated electrothermic associating provided by the invention, comprises high-pressure section, low-pressure section and sealable tank part;
Described high-pressure section, for providing high-voltage power supply and high-field electrode;
Described sealable tank part, for providing container that is aging and shelf depreciation, and ensures impermeability;
Described low-pressure section, for providing the placement platform of low-field electrode and oilpaper defect model, described high-pressure section is arranged at the top of sealable tank part and is fixed on the lid of sealable tank part, described low-pressure section is arranged at the bottom of sealable tank part space interior, and described high-pressure section is near low-pressure section.
Described sealable tank part comprises sealed shell of tank, gland bonnet, sealing gasket and holding screw;
Be provided with sealing gasket between described sealed shell of tank and gland bonnet, be provided with for fastening screw between described sealed shell of tank and gland bonnet; Described low-pressure section is arranged at sealed shell of tank inside;
Described high-pressure section runs through and is arranged at gland bonnet central authorities, and it is inner close with low-pressure section that described high-pressure section one end is placed in sealed shell of tank, and the other end is exposed to sealed shell of tank outside.
Described high-pressure section comprises high-pressure conduit, high-field electrode bar, high-field electrode, the anti-corona cover of high pressure;
Described high-pressure conduit runs through and is arranged at high pressure and covers, described high-field electrode bar runs through and is arranged at high-pressure conduit inside, one end that described high-field electrode bar is exposed to pressure pan external body is provided with the anti-corona cover of high pressure, and one end that described high-field electrode bar stretches into high pressure tank interior is provided with high-field electrode.
Described low-pressure section comprises low pressure plate electrode, cardboard fixed support, plate electrode fixed screw, cardboard and cardboard pressure strip; Described cardboard fixed support is arranged in high pressure inner tank wall, and described cardboard fixed support is provided with low pressure plate electrode; Described cardboard fixed support is connected with high pressure tank body by plate electrode fixed screw, and described cardboard is arranged at above low pressure plate electrode, and described cardboard is also provided with cardboard pressure strip; The extreme low pressure plate electrode near low-pressure section of high-tension electricity of described high-pressure section.
Described high-field electrode is the one in high voltage needle electrode, post electrode or the ball electrode done by copper; Described high-field electrode adopts epoxide-resin glue to seal between contacting with high-pressure conduit.
Described high-pressure conduit and gland bonnet contact position tapered, and to screw with conduit holding screw; Waterline groove is carved with in the position sealed between described gland bonnet and sealed shell of tank.
Screw thread installation and removal can be passed through between described high-field electrode and high-field electrode bar.
Described high pressure tank body is also provided with gas valve.
The embodiment of the present invention additionally provides the aging and local discharge integrated test method of a kind of transformer oil paper insulation defect model electric heating associating, comprises the following steps:
S1: dry transformer oilpaper;
S2: oil good for pre-service is put into electric heating with oilpaper and combines aging equipment, the oil groove this device being put into constant temperature carries out oil bath;
S3: connecting circuit, applies high pressure to aging equipment, carries out electric heating associating burn-in test.
In described step S1, dry run is specific as follows: first by paper in 90 DEG C/50Pa environment dry 48 hours, then paper is put into oil dry 48 hours of 90 DEG C/50Pa environment;
In described step S2, oil bath process is specific as follows: first poured into by the oil that pre-service is good in electric heating associating aging equipment, cardboard is placed on above low pressure plate electrode, cover gland bonnet, screw holding screw, gas valve is utilized to vacuumize device and pass into nitrogen, then the oil groove whole device being put into constant temperature carries out oil bath, controls the position of height to gas valve of the oil in oil groove, and the effect of device being put into oil groove is the constant of guarantee thermal aging temperature;
In described step S3, electric heating associating burn-in test process is specific as follows: first connecting circuit, then high pressure is applied to aging equipment, gather the voltage of shelf depreciation, to be dischargedly stablize and after carrying out operating frequency phase correction, finally utilize digital oscilloscope to each test product collection shelf depreciation raw data.
Embodiment 2
The difference of the present embodiment and embodiment 1 is only:
See Fig. 1, the transformer oil paper insulation defect model electric heating associating aging test of this preferred embodiment and local discharge integrated test unit, referred to as ageing can, it comprises high-pressure section, low-pressure section and sealable tank part.
The sealing gasket 8 that the high-pressure conduit 3 that described high-pressure section comprises high-voltage corona cover 1 that material is copper, high pressure copper electrode bar 2, material are teflon, material are teflon, material are the high voltage needle electrode/post electrode/ball electrode 10 of copper;
Described sealable tank part comprises material is stainless sealed shell of tank 8, material is stainless gland bonnet 6, material is teflon sealing gasket 7, material is stainless gas valve 9, material be stainless holding screw 4 is stainless conduit holding screw 5 with material;
The cardboard pressure strip 11 that described low-pressure section comprises low pressure plate electrode 13 that material is copper, material is stainless plate electrode fixed screw 15, cardboard 12, material are thick wood and material are the cardboard fixed support 14 of thick wood.
Ageing can device is described as follows:
Fig. 1 is the sectional view of ageing can, and whole ageing can is cylindric, and high-field electrode bar 2, high voltage needle electrode/post electrode/ball electrode 10 and low pressure plate electrode 13 are positioned at the geometric center of ageing can, to ensure the even of electric field.
The gap epoxide-resin glue that high pressure copper electrode 2 contacts with high-pressure conduit 3 seals, and affects with isolated outside air, ensures the impermeability of ageing can.
The place that high-pressure conduit 3 contacts with gland bonnet 6 is tapered, and firmly screws with conduit holding screw 5, to ensure the impermeability of ageing can.
High-pressure conduit 3 arranges enough creepage distances, ensures 30kV and creeping discharge and edge flashing does not occur below, ensures that ageing can system does not introduce shelf depreciation.
High voltage needle electrode/plate electrode/can pass through screw thread installation and removal between ball electrode 10 and high-field electrode bar 2, can form different shelf depreciation artificial models respectively: pin electrode 101, cardboard 12 and low pressure plate electrode 13 can form the needle plate model of corona discharge in oil; Plate electrode 102, cardboard 12 can form creeping discharge model with low pressure plate electrode 13; And the cardboard air gap 12 of ball electrode 103, artificial bonding may be used for simulating air gap discharging model with low pressure plate electrode 13.
Waterline groove is carved with in the position sealed between gland bonnet 6 and sealed shell of tank 8, to ensure the sealing property of ageing can.
The effect of gas valve 9 is to provide ageing can and extraneous unique interface, vacuum pump can be used to be extracted out by air in tank, form vacuum environment; Also drying nitrogen can be passed into by this valve, with the impact of isolated outside air.In addition, because whole tank body is same current potential, this valve can as the junction of ground wire.
The part of low-pressure section is described above.During installation, first place cardboard fixed mount, low pressure plate electrode is fixed on plate electrode fixed screw, puts local discharge test cardboard, then place cardboard pressure strip 11, and fastening with insulating screw.The effect of cardboard fixed mount 14 is, but the position of fixing cardboard 12, makes cardboard just can put in can not move left and right.Cardboard fixed mount and cardboard pressure strip can ensure the consistance of each sample placement location, ensure the repeatability of experiment, can to ensure in discharge process that cardboard can not move to cause barrier action in oil to suddenly disappear causing flashover, burn out experiment porch and detect oscillograph simultaneously.
With reference to Fig. 2, high voltage needle electrode 101, high-pressure column electrode 102 and smash electrode 103, with reference to international standard, ensure that geometry is symmetrical;
With reference to Fig. 3, gland bonnet 6 is provided with four holding screw holes, and gland bonnet 6 contacts place and is carved with two circle waterline grooves with sealed shell of tank 8, and waterline groove and sealing gasket coordinate the impermeability that can ensure ageing can.
An experimental technique for the associating accelerated deterioration of transformer oil paper insulated electrothermic and shelf depreciation, its step is:
1) simulate real transformer oilpaper and processing procedure, by paper in 90 DEG C/50Pa environment dry 48 hours, then paper is put into new transformer oil dry 48 hours of 90 DEG C/50Pa environment;
2) oil that pre-service is good is poured in electric heating associating aging equipment, cardboard is placed on above low pressure plate electrode 13, cover gland bonnet 6, screw holding screw 4, gas valve 9 pairs of devices are utilized to vacuumize and pass into nitrogen, then the oil groove whole device being put into constant temperature carries out oil bath, controls the position of height to gas valve 9 of the oil in oil groove, and the effect of device being put into oil groove is the constant of guarantee thermal aging temperature;
3) according to Fig. 4 connecting circuit figure, high pressure is applied to aging equipment, carry out electric heating associating aging, the voltage of test collection shelf depreciation is chosen as 1.2 times of firing potential, and 10min is kept under this voltage, to be dischargedly stablize and after carrying out operating frequency phase correction, utilize Wavepro7100 digital oscilloscope to gather the shelf depreciation raw data of 2000 power frequency periods to each test product, then gathering once every 12 hours.
With reference to Fig. 4, be the Partial Discharge Measurement System using electric heating associating aging equipment as test product as shown in the figure.Aging equipment is positioned in the adjustable thermostatic oil bath of temperature 16; system provides power supply by 380V low-tension supply 17; high pressure is risen to by the halo-free HT testing transformer 18 of 50kVA/50kV; protection water resistance 19 pairs of test units of 5k Ω are used to protect; the high-voltage power voltage that capacitive divider 21 records is transferred to oscillograph 23 passage 2; shelf depreciation produce current signal detected by pulses of current sensor 24, via amplifier 22 amplify after with co-axial cables transport to channel oscilloscope 1.Testing transformer arranges shielding line 20 to test product with to the high-voltage connection of voltage divider, eliminates the corona signal that high-voltage connection produces, and avoids affecting the measurement that test product office puts.
Embodiment 3
The difference of the present embodiment and embodiment 2 is only:
The present invention is used to carry out the aging and partial discharge test of corona discharge defect model electric heating associating.Select 25# common transformer oil and the thick common insulating board of 1mm as test material, cardboard is carried out cutting according to diameter 80mm.Carry out pre-service according to preceding method to oil and paper, be placed on by cardboard above low pressure plate electrode 13, the distance between adjustment pin electrode and cardboard is 1mm, as shown in Figure 5.Cover gland bonnet 6, screw holding screw 4, utilize gas valve 9 pairs of devices to be evacuated down to 50Pa, pass into nitrogen, the oil groove then whole device being put into constant temperature carries out oil bath, and arranging oil bath temperature is 90 degree.Corona discharge firing potential is 12kV, then under 18kV, keep 10min, and stable rear collection to be discharged 2000 power frequency periods, then gathered once every 12 hours.Be illustrated in figure 6 the phase-resolved partial discharge collection of illustrative plates (PRPD) of the aging lower 24kV corona discharge of electric heating associating.
Embodiment 4
The difference of the present embodiment and embodiment 2 is only:
The present invention is used to carry out the aging and partial discharge test of creeping discharge defect model electric heating associating.Shown in Fig. 7, high-field electrode adopts diameter to be 25mm, is highly the post electrode of 25mm, low-field electrode is placed the oil immersion cardboard that diameter is 80mm, be pressed on cardboard by post electrode.Arranging oil bath temperature is 90 degrees Celsius, and creeping discharge starting potential is 19kV, then under 23kV, keep 10min, 2000 fair cycles of stable rear collection to be discharged, then gathers once every 12 hours.Be illustrated in figure 6 the phase-resolved partial discharge collection of illustrative plates (PRPD) of the aging lower 23kV creeping discharge of electric heating associating.
Embodiment 5
The difference of the present embodiment and embodiment 2 is only:
The present invention is used to carry out the aging and partial discharge test of bubble-discharge defect model electric heating associating.Shown in Fig. 9, high-field electrode employing diameter is the ball electrode of 5.6mm, low-field electrode is placed the air gap model of artificial bonding, and void dimension is diameter 2mm height 0.5mm, is pressed on cardboard by post electrode.Arranging oil bath temperature is 90 degree, and bubble-discharge starting potential is 5kV, then under 7kV, keep 10min, 2000 fair cycles of stable rear collection to be discharged, then gathers once every 12 hours.Be the PRPD collection of illustrative plates of the aging lower 7kV bubble-discharge of electric heating associating as shown in Figure 10.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (3)
1. the aging and local discharge integrated experimental provision of transformer oil paper insulated electrothermic associating, is characterized in that: comprise high-pressure section, low-pressure section and sealable tank part;
Described high-pressure section, for providing high-voltage power supply and high-field electrode;
Described sealable tank part, for providing container that is aging and shelf depreciation, and ensures impermeability;
Described low-pressure section, for providing the placement platform of low-field electrode and oilpaper defect model;
Described high-field electrode is the one in high voltage needle electrode, post electrode or the ball electrode done by copper; Described high-field electrode adopts epoxide-resin glue to seal between contacting with high-pressure conduit; Described high-pressure conduit and gland bonnet contact position tapered, and to screw with conduit holding screw; Waterline groove is carved with in the position sealed between described gland bonnet and sealed shell of tank; By screw thread installation and removal between described high-field electrode and high-field electrode bar;
Described sealable tank part comprises sealed shell of tank, gland bonnet, sealing gasket and holding screw;
Be provided with sealing gasket between described sealed shell of tank and gland bonnet, be provided with for fastening screw between described sealed shell of tank and gland bonnet; Described low-pressure section is arranged at sealed shell of tank inside;
Described high-pressure section runs through and is arranged at gland bonnet central authorities, and it is inner close with low-pressure section that described high-pressure section one end is placed in sealed shell of tank, and the other end is exposed to sealed shell of tank outside;
Described low-pressure section comprises low pressure plate electrode, cardboard fixed support, plate electrode fixed screw, cardboard and cardboard pressure strip; Described cardboard fixed support is arranged in high pressure inner tank wall, and described cardboard fixed support is provided with low pressure plate electrode; Described cardboard fixed support is connected with high pressure tank body by plate electrode fixed screw, and described cardboard is arranged at above low pressure plate electrode, and described cardboard is also provided with cardboard pressure strip; The extreme low pressure plate electrode near low-pressure section of high-tension electricity of described high-pressure section.
2. the aging and local discharge integrated experimental provision of transformer oil paper insulated electrothermic associating according to claim 1, is characterized in that: described high-pressure section comprises high-pressure conduit, high-field electrode bar, high-field electrode, the anti-corona cover of high pressure;
Described high-pressure conduit runs through and is arranged at high pressure and covers, described high-field electrode bar runs through and is arranged at high-pressure conduit inside, one end that described high-field electrode bar is exposed to pressure pan external body is provided with the anti-corona cover of high pressure, and one end that described high-field electrode bar stretches into high pressure tank interior is provided with high-field electrode.
3. the aging and local discharge integrated experimental provision of transformer oil paper insulated electrothermic associating according to claim 1, is characterized in that: described high pressure tank body is also provided with gas valve.
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