CN105738711B - Space charge measurement high-field electrode device - Google Patents
Space charge measurement high-field electrode device Download PDFInfo
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- CN105738711B CN105738711B CN201610096689.1A CN201610096689A CN105738711B CN 105738711 B CN105738711 B CN 105738711B CN 201610096689 A CN201610096689 A CN 201610096689A CN 105738711 B CN105738711 B CN 105738711B
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- 239000011347 resin Substances 0.000 claims abstract description 75
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- 239000002184 metal Substances 0.000 claims abstract description 68
- 229910052751 metal Inorganic materials 0.000 claims abstract description 68
- 230000004888 barrier function Effects 0.000 claims abstract description 34
- 238000005192 partition Methods 0.000 claims abstract description 33
- 239000003990 capacitor Substances 0.000 claims description 22
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- NMFHJNAPXOMSRX-PUPDPRJKSA-N [(1r)-3-(3,4-dimethoxyphenyl)-1-[3-(2-morpholin-4-ylethoxy)phenyl]propyl] (2s)-1-[(2s)-2-(3,4,5-trimethoxyphenyl)butanoyl]piperidine-2-carboxylate Chemical compound C([C@@H](OC(=O)[C@@H]1CCCCN1C(=O)[C@@H](CC)C=1C=C(OC)C(OC)=C(OC)C=1)C=1C=C(OCCN2CCOCC2)C=CC=1)CC1=CC=C(OC)C(OC)=C1 NMFHJNAPXOMSRX-PUPDPRJKSA-N 0.000 description 2
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/12—Measuring electrostatic fields or voltage-potential
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The invention discloses a kind of space charge measurement high-field electrode devices, the high-field electrode device includes: grounded metallic shield cover, high-pressure metal electrode, high voltage direct current insulating sleeve, high voltage direct current conducting rod, high-voltage pulse insulating sleeve, high-voltage pulse conducting rod and internal circuit, wherein, partition is equipped in grounded metallic shield cover, partition limits air insulating layer and the resin insulating barrier filled with insulating resin in grounded metallic shield cover；High voltage direct current conducting rod is located in high voltage direct current insulating sleeve and passes through the roof of grounded metallic shield cover and partition extend into resin insulating barrier and connect with high-pressure metal electrode；High-voltage pulse conducting rod is located in high-voltage pulse insulating sleeve and passes through grounded metallic shield cover and extend into air insulating layer；Internal circuit is connected with high-voltage pulse conducting rod and high-pressure metal electrode respectively.The convenient replacing of insulating resin may be implemented in space charge measurement according to the present invention high-field electrode device, reduces cost of manufacture.
Description
Technical field
The present invention relates to solid insulating material technical field of performance test, high more particularly, to a kind of space charge measurement
Press electrode assembly.
Background technique
Pulse electroacoustic method space charge distribution measurement techniques, which have become, studies solid insulating material space charge characteristic most both at home and abroad
One of general measuring technique.The measuring technique be mainly used under the conditions of DC electric field solid insulating material internal space-charge and
The dynamic evolutions process such as injection, migration, accumulation and dissipation of space charge is studied in the measurement of electric-field intensity distribution characteristic, in conjunction with
Relevant physical model can analyze origin mechanism, Transport and the space charge pair of solid insulating material internal charge
The influence of the performances such as insulating materials conductance, aging, breakdown.
In recent years, high voltage direct current cable technology is fast-developing with extra-high voltage direct-current transmission engineering, and space charge is imitated
Its main limiting factor should be had become.Pulse electroacoustic method space charge distribution measurement techniques through continuous development with it is perfect, at
For the important means of testing of direct current cables insulating materials under research actual operating mode.Pulse electroacoustic method space charge measuring system
It is divided into plate and cable-type, the former is directed to power cable bulk sample mainly for sheet film sample, the latter.In more physics
In the plate space charge measuring system of field coupling, high-field electrode device has coupled DC electric field, impulse electric field, temperature simultaneously
Field and mechanical stress fields, with the space charge characteristic inside insulating materials under test simulation operating condition.High-field electrode device tool
There is the development trend of miniaturization, this requires compact electrode interior structure, and by reasonable Insulation Coordination, will using insulating resin
High pressure component is potted and solidifies.Insulating resin will play the role of isolation voltage after solidification, while operate in different
Temperature field and mechanical stress off field, bear long-term electricity-heat-power joint aging.After longtime running, dielectric resin material into
Phenomena such as entering the rapid degradation stage, being usually expressed as internal breakdown.In addition, in actual high-voltage electrode assembly manufacturing process, insulation
Unavoidably there is the defects of micro-bubble in resin, insulation performance will be made to decline to a great extent, and current situation is gone out under lower DC voltage
Portion's electric discharge phenomena, or even puncture in advance.
High-field electrode device in the related technology generallys use single layer dielectrics structure, i.e., is potted using insulating resin,
It is helpless for breakdown accident caused by electricity-heat-power joint aging and insulation defect problem, it can only remake,
The disadvantage is that at high cost, low efficiency, heavy workload, processing and fabricating period are long, it is not easy to investigate thoroughly cause of accident.In addition, nanosecond high pressure
Pulse signal is extremely sensitive to circuit topological structure, and the high-field electrode device calibration of new production and debugging efforts are particularly important.
Summary of the invention
The present invention is directed at least solve one of the technical problems existing in the prior art.Therefore, the present invention intends to propose one
Kind space charge measurement high-field electrode device, the space charge measurement high-field electrode device can be small-sized in holding meanss
Quickly replacement insulate and improves pressure-resistant performance while change, and in insulation replacement process, main components can in original device
Recycling, is effectively saved cost.
Space charge measurement according to the present invention high-field electrode device, comprising: grounded metallic shield cover, the ground connection gold
Belong to the upper end closed and open at its lower end of shielding case, is equipped with partition in the grounded metallic shield cover, and the partition connects described
Superposed air insulating layer and the resin insulating barrier positioned at lower part, and the insulation resin are limited in ground metallic shield
Insulating resin is filled in layer；At least part of high-pressure metal electrode, the high-pressure metal electrode is located at the insulation resin
In layer；High voltage direct current insulating sleeve, the high voltage direct current insulating sleeve are in the tubulose vertically extended, the high voltage direct current
Insulating sleeve sequentially pass through the roof of the grounded metallic shield cover from top to bottom and the partition to extend into the resin exhausted
In edge layer；High voltage direct current conducting rod, it is interior and vertically square that the high voltage direct current conducting rod is located at the high voltage direct current insulating sleeve
It is connect to extending to the high-pressure metal electrode；High-voltage pulse insulating sleeve, the high-voltage pulse insulating sleeve are in hollow tube
Shape, and the high-voltage pulse insulating sleeve passes through the grounded metallic shield cover outer wall and extend into the air insulating layer；It is high
Pulse conducting rod is pressed, the high-voltage pulse conducting rod is located in the high-voltage pulse insulating sleeve；Internal circuit, the internal electricity
Road is connected with the high-voltage pulse conducting rod and the high-pressure metal electrode respectively.
Space charge measurement according to the present invention high-field electrode device, by utilizing partition in grounded metallic shield cover
The resin insulating barrier of air insulating layer and fillable insulating resin is limited, thus, it is possible to keeping original high-field electrode device
Under the premise of size constancy, the convenient replacing of high-field electrode device interior insulation resin is realized, improve pressure-resistant performance, and in replacement
In the process, most of component is reusable, to be effectively reduced cost of manufacture.
In some embodiments of the invention, the lower section of the grounded metallic shield cover is equipped with and the grounded metallic shield
Cover is spaced apart the grounding plate for accepting sample.
In some embodiments of the invention, the lower end of the high-pressure metal electrode extends downwardly the grounded metallic shield
The lower end surface of cover, and the lower end of the high-pressure metal electrode is equipped with the semiconductive being bonded with the lower end surface of the high-pressure metal electrode
Layer.
In some embodiments of the invention, the internal circuit includes resistance and capacitor, one end difference of the capacitor
It is connected with the resistance and the high-voltage pulse conducting rod, and the other end of the capacitor is connected with the high-pressure metal electrode,
The other end of the resistance connects the grounded metallic shield cover.
Further, the resistance is located in the air insulating layer, and the capacitor is packaged in the resin insulating barrier
It is interior.
In some embodiments of the invention, the high-voltage pulse insulating sleeve is in hollow cylindrical shape.
In some embodiments of the invention, the high-voltage pulse insulating sleeve is located at the week of the grounded metallic shield cover
Top on wall and positioned at the partition.
In some embodiments of the invention, the high voltage direct current insulating sleeve is cylindrical hollow structure, the high straightening
Stream insulating sleeve be inserted perpendicularly into and pass through from the roof center of the grounded metallic shield cover air insulating layer and it is described every
After plate, it is connected in the resin insulating barrier with the top of the high-pressure metal electrode.
In some embodiments of the invention, the inner peripheral surface of the air insulating layer and the resin insulating barrier is in along upper
The cylindrical shape that lower direction extends, and the radial dimension of the air insulating layer inner peripheral surface is less than the resin insulating barrier inner peripheral surface
Radial dimension is connected with step surface between the inner peripheral surface of the air insulating layer and the inner peripheral surface of the resin insulating barrier, described
Step surface is in annular directed downwardly, and the partition is against on the step surface.
In some embodiments of the invention, the grounded metallic shield cover includes grounded metal annulus and top cover, described
Grounded metal annulus is in the hollow straight-tube shape vertically extended, the upper end of grounded metal annulus described in the top closure.
In some embodiments of the invention, there are two symmetrical and not perforative about centre bore for the upper surface of the top cover
Hemisphere groove.
Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
Fig. 1 is the schematic diagram of space charge measurement high-field electrode device according to an embodiment of the present invention.
Appended drawing reference:
Space charge measurement high-field electrode device 100,
Grounded metallic shield cover 1, grounded metal annulus 11, partition 13, grounding plate 14,
Top cover 12, hemisphere groove 121,
High-pressure metal electrode 2,
High voltage direct current insulating sleeve 31, high voltage direct current conducting rod 32,
High-voltage pulse insulating sleeve 41, high-voltage pulse conducting rod 42,
Capacitor 51, resistance 52,
Semi-conductive layer 6, insulating resin 7, sample 8.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
Following disclosure provides many different embodiments or example is used to realize different structure of the invention.For letter
Change disclosure of the invention, hereinafter the component of specific examples and setting are described.Certainly, they are merely examples, and
It is not intended to limit the present invention.In addition, the present invention can in different examples repeat reference numerals and/or letter.It is this heavy
It is for purposes of simplicity and clarity, itself not indicate the relationship between discussed various embodiments and/or setting again.This
Outside, the present invention provides various specific techniques and material example, but those of ordinary skill in the art may be aware that
The applicable property of other techniques and/or the use of other materials.
Space charge measurement high-field electrode device 100 according to an embodiment of the present invention is described below with reference to Fig. 1.
As shown in Figure 1, space charge measurement according to an embodiment of the present invention high-field electrode device 100, comprising: ground connection gold
Belong to shielding case 1, high-pressure metal electrode 2, high voltage direct current insulating sleeve 31, high voltage direct current conducting rod 32, high-voltage pulse insulating sleeve
41, high-voltage pulse conducting rod 42 and internal circuit.
Specifically, the upper end closed and open at its lower end of grounded metallic shield cover 1, grounded metallic shield cover 1 is interior to be equipped with partition
13, and partition 13 limits superposed air insulating layer and the insulation resin positioned at lower part in grounded metallic shield cover 1
Layer, and insulating resin 7 is filled in resin insulating barrier.In this way, by filling insulating resin 7, it can be by the member in resin insulating barrier
Part (such as high-pressure metal electrode 2, high voltage direct current insulating sleeve 31 shown in Fig. 1 and capacitor 51 etc.) fixing seal is in insulation
In resin 7, and make its mutually insulated.In addition, being located at the air insulating layer on 1 top of grounded metallic shield cover, it can insulate and be located at
Element (such as high-voltage pulse insulating sleeve 41, high-voltage pulse conducting rod 42 shown in Fig. 1 and resistance 52) in it, and working as need to
When replacing insulating resin 7, it is possible to provide the operating space of replacement insulating resin 7, while during replacement, in air insulating layer
Most of component it is reusable, thus effectively save the cost.
At least part of high-pressure metal electrode 2 is located in resin insulating barrier, as a result, can be by resin insulating barrier by high pressure
Metal electrode 2 is fixed in metallic shield.
High voltage direct current insulating sleeve 31 is in the tubulose that vertically extends, high voltage direct current insulating sleeve 31 from top to bottom according to
Secondary roof and partition 13 across grounded metallic shield cover 1 is extend into resin insulating barrier；High voltage direct current conducting rod 32 is located at
In high voltage direct current insulating sleeve 31 and vertically extends to high-pressure metal electrode 2 and connect.In this way, high voltage direct current conducting rod
32 can introduce high direct voltage on high-pressure metal electrode 2, meanwhile, high voltage direct current insulating sleeve 31 can lead high voltage direct current
High direct voltage and grounded metallic shield cover 1 in electric pole 32 insulate.
High-voltage pulse insulating sleeve 41 is in hollow tubular, and high-voltage pulse insulating sleeve 41 passes through grounded metallic shield cover 1
Outer wall is extend into air insulating layer；High-voltage pulse conducting rod 42 is located in high-voltage pulse insulating sleeve 41；Internal circuit difference
It is connected with high-voltage pulse conducting rod 42 and high-pressure metal electrode 2.In this way, high-voltage pulse conducting rod 42 can introduce high-voltage pulse
Onto high-pressure metal electrode 2, meanwhile, the high-tension pulse that high-voltage pulse insulating sleeve 41 can will pass through in high-voltage pulse conducting rod 42
Punching is insulated with grounded metallic shield cover 1.
Space charge measurement according to an embodiment of the present invention high-field electrode device 100, by being grounded using partition 13
The resin insulating barrier of air insulating layer and fillable insulating resin 7 is limited in metallic shield 1, thus, it is possible to keeping former
Under the premise of having 100 size constancy of high-field electrode device, realizes the convenient replacing of 100 interior insulation resin 7 of high-field electrode device, mention
High voltage performance, and during replacement, most of component is reusable, to be effectively reduced cost of manufacture.
In one embodiment of the invention, the lower section of grounded metallic shield cover 1 is equipped with is spaced with grounded metallic shield cover 1
Open the grounding plate 14 for accepting sample 8.As shown in Figure 1, grounding plate 14 is located at entire high-field electrode device 100
Bottom can be used as 100 ground electrode of high-field electrode device, improve the safety of test, in addition, grounding plate 14 is also used as
The fixation member of grounded metallic shield cover 1.Preferably, when placing sample 8 on grounding plate 14,14 He of grounding plate
Drop has silicone oil between sample 8, to eliminate influence of the air gap to Acoustic Wave Propagation.
In one embodiment of the invention, as shown in Figure 1, the lower end of high-pressure metal electrode 2 extends downwardly grounded metal
The lower end surface of shielding case 1, and the lower end of high-pressure metal electrode 2 is equipped with the semiconductive being bonded with the lower end surface of high-pressure metal electrode 2
Layer 6.It can reduce sound wave in the reflection of 8 upper surface of sample by the way that semi-conductive layer 6 is arranged as a result, and electric power can also be simulated
6 structure of semi-conductive layer in cable interior insulation.
In one embodiment of the invention, as shown in Figure 1, internal circuit includes resistance 52 and capacitor 51, capacitor 51
One end (such as upper end shown in Fig. 1) is connected with resistance 52 and high-voltage pulse conducting rod 42 respectively, and the other end of capacitor 51
(such as lower end shown in Fig. 1) is connected with high-pressure metal electrode 2, and the other end of resistance 52 connects grounded metallic shield cover 1.By
This, high-voltage pulse can be introduced on high-pressure metal electrode 2 by the capacitor 51 of internal circuit, meanwhile, resistance 52 can be to high pressure
Pulse carries out impedance matching, to reduce the reflecting component of high-voltage pulse.
Preferably, as shown in Figure 1, resistance 52 is located in air insulating layer, and capacitor 51 is packaged in resin insulating barrier, with
Isolated DC high voltage introduces pulse voltage.In this way, electricity during replacing insulating resin 7, in air insulating layer
Most of component such as resistance 52 is reusable, thus effectively save the cost.Meanwhile double hyer insulation knot is realized using partition 13
Structure, in replacement, it is only necessary to which replacement is located at the capacitor 51 in resin insulating barrier, thus when reducing replacement cost and processing
Between.In addition, the topologies change of 100 internal circuit of high-field electrode device is small, shortens debugging cycle and ensure that high pressure
The consistency of the replacement of electrode assembly 100 front and back test performance.
In one embodiment of the invention, as shown in Figure 1, high-voltage pulse insulating sleeve 41 is in hollow cylindrical shape.
It is possible thereby to improve the insulation performance of high-voltage pulse insulating sleeve 41.
In one embodiment of the invention, as shown in Figure 1, high-voltage pulse insulating sleeve 41 is located at grounded metallic shield cover
Top on 1 peripheral wall and positioned at partition 13.In this way, when replacing insulating resin 7, high-voltage pulse insulating sleeve 41 and high-tension pulse
It is reusable to rush conducting rod 42, it is possible thereby to reduce replacement cost and process time, makes the structure of high-field electrode device 100 more
Adduction reason.
In one embodiment of the invention, high as shown in Figure 1, high voltage direct current insulating sleeve 31 is cylindrical hollow structure
DC insulation annular tube 31 is pressed to be inserted perpendicularly into and pass through air insulating layer and partition 13 from the roof center of grounded metallic shield cover 1
Afterwards, it is connected in resin insulating barrier with the top of high-pressure metal electrode 2, it is possible thereby to effectively will be in high voltage direct current conducting rod 32
High direct voltage and grounded metallic shield cover 1 insulate.
In one embodiment of the invention, as shown in Figure 1, the inner peripheral surface of air insulating layer and resin insulating barrier is in edge
The cylindrical shape that up and down direction extends, and the radial dimension of air insulating layer inner peripheral surface is less than resin insulating barrier inner peripheral surface radial ruler
It is very little, step surface is connected between the inner peripheral surface of air insulating layer and the inner peripheral surface of resin insulating barrier, step surface is in annular directed downwardly,
Partition 13 is against on step surface.Preferably, leakproof is passed through in the gap between partition 13 and the internal perisporium of grounded metallic shield cover 1
Processing, thus, it is possible to which effectively resin insulating barrier and air insulating layer are isolated.
In one embodiment of the invention, as shown in Figure 1, grounded metallic shield cover 1 includes 11 He of grounded metal annulus
Top cover 12, grounded metal annulus 11 are in the hollow straight-tube shape vertically extended, and top cover 12 closes grounded metal annulus 11
Upper end.As a result, grounded metallic shield cover 1 can effectively barrier external environment interference signal.
Preferably, the sprayable non-sticky coating of the inner wall of grounded metal annulus 11, to be conducive in high-field electrode device 100
Insulating resin 7 demoulding and replacement.
In one embodiment of the invention, as shown in Figure 1, the upper surface of top cover 12 there are two symmetrical about centre bore and
Not perforative hemisphere groove 121.It is possible thereby to by the fixed high-field electrode device 100 of hemisphere groove 121, to improve high-voltage electricity
The security reliability of pole device 100.
Space charge measurement high-field electrode device 100 according to an embodiment of the invention is described below with reference to Fig. 1.
Referring to Fig.1, space charge measurement high-field electrode device 100 includes grounded metal annulus 11, top cover 12, partition
13, grounding plate 14, high-pressure metal electrode 2, semi-conductive layer 6, high voltage direct current insulating sleeve 31, high voltage direct current conducting rod 32,
High-voltage pulse insulating sleeve 41, high-voltage pulse conducting rod 42 and internal circuit.Wherein, top cover 12 is sealed on grounded metal annulus 11
Upper end and be configured to grounded metallic shield cover 1, grounding plate 14 is located at ground connection as the ground electrode of high-field electrode device 100
The lower section of metallic shield 1.
Specifically, as shown in Figure 1, the internal perisporium of grounded metal annulus 11 is equipped with step surface directed downwardly, partition 13 is fixed
On the step surface inside grounded metal annulus 11, during being centrally formed with of partition 13 passes through for high voltage direct current insulating sleeve 31
Space in grounded metallic shield cover 1 is divided into two parts up and down by heart hole, partition 13, wherein and top is air insulating layer, under
Portion can be filled insulating resin 7 and form resin insulating barrier, that is to say, that insulating resin 7 is filled in grounded metallic shield cover 1 and partition
In the lower space of 13 compositions.
High-pressure metal electrode 2 is fixed on inside grounded metallic shield cover 1 by resin insulating barrier, high-pressure metal electrode 2
Upper end is connected with the high voltage direct current conducting rod 32 in high voltage direct current insulating sleeve 31, the lower surface of high-pressure metal electrode 2 with partly lead
Electric layer 6 contacts.High-voltage pulse insulating sleeve 41 is cylindrical hollow elongate structure, and is penetrated from the periphery wall of grounded metal annulus 11
In air insulating layer；High-voltage pulse conducting rod 42 be set in the inside of high-voltage pulse insulating sleeve 41 and in air insulating layer with it is interior
Portion's circuit is connected.High voltage direct current insulating sleeve 31 is cylindrical hollow elongate structure, is vertically penetrated from 12 centre of top cover, and successively
It is connected after air insulating layer and partition 13 with 2 top of high-pressure metal electrode, high voltage direct current conducting rod 32 is set in high straightening
It flows inside insulating sleeve 31.
Internal circuit includes capacitor 51 and resistance 52, capacitor 51 be packaged in insulating resin 7 and with 2 phase of high-pressure metal electrode
Even；Resistance 52 is located at air insulating layer.The upper end of capacitor 51 is connected with resistance 52 and high-voltage pulse conducting rod 42 respectively, and capacitor
51 lower end is connected with high-pressure metal electrode 2, the lower end of resistance 52 is connected with high-voltage pulse conducting rod 42 and capacitor 51 respectively, on
End is connected with grounded metallic shield cover 1.
When casting insulated resin 7, upward, partition 13 is fixed on the 11 inner wall milling of grounded metal annulus to high-pressure metal electrode 2
On the step surface at place, anti-drain process is passed through in the gap between partition 13 and grounded metal annulus 11, by resin insulating barrier and
Air insulating layer isolation.When needing to change insulating resin 7, top cover 12 is opened, and internal circuit is carried out in air insulating layer
Then decoupling processing takes out insulating resin 7 and fixed high-pressure metal electrode 2 therein and high voltage direct current insulating sleeve 31,
High-pressure metal electrode 2 and high voltage direct current insulating sleeve 31 can then be taken out from insulating resin 7.Then, according to original
Position reconnects the topological structure of internal circuit, is poured new insulating resin 7.
When work test, a few drop silicone oil are dripped in the central location of grounding plate 14, tested sample 8 is then placed on drop
There is 14 center of grounding plate of silicone oil.Silicone oil is instilled in 8 face center position of tested sample, then high-field electrode device is installed
100 fix it and high-pressure metal electrode 2 and 8 surface of sample are made to keep being in close contact.Wherein, silicone oil is to eliminate contact surface
Air, to improve Acoustic Wave Propagation effect.Then, apply required high-voltage pulse and high-voltage dc voltage, the two is superimposed simultaneously
On sample 8, to carry out the test of space charge.
Space charge measurement according to an embodiment of the present invention high-field electrode device 100, realizes high-field electrode device 100
The replaceable function of insulating resin 7.In replacement process, most of component can be reused, cost of manufacture is effectively reduced.
Meanwhile the double-layer insulating structure of resin insulating barrier and air insulating layer so that partial circuit component in air insulating layer with
Insulating resin 7 is isolated.Therefore, capacitor 51 has only been replaced in circuit topological structure when replacing insulating resin 7, has shortened debugging cycle
And guarantee the consistency of 100 test result of replacement front and back high-field electrode device.As a result, can quickly, conveniently, basis at low cost
Demand replaces insulating resin 7, the especially testing requirement under adaptation multiple physical field coupling condition, has effectively expanded space charge survey
The use scope of amount technology.
In addition, space charge measurement according to an embodiment of the present invention high-field electrode device 100, can not only keep former high
The characteristics of pressing electrode assembly 100 to minimize, and the feature replaceable due to insulating resin 7, also help insulating inner state
Diagnosis, fault point；Due to thus also improving high-voltage electricity from top access high direct voltage using double-layer insulating structure
The pressure-resistant performance of pole device 100.
In the description of the present invention, it is to be understood that, term " center ", " length ", "upper", "lower", "top", "bottom",
The orientation or positional relationship of the instructions such as "inner", "outside", " circumferential direction " be based on the orientation or positional relationship shown in the drawings, merely to
Convenient for description the present invention and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation,
It is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected, can also be communication；It can be directly connected, can also indirectly connected through an intermediary, it can be with
It is the interaction relationship of the connection or two elements inside two elements.For the ordinary skill in the art, may be used
To understand the concrete meaning of above-mentioned term in the present invention as the case may be.
In the present invention unless specifically defined or limited otherwise, fisrt feature in the second feature " on " or " down " can be with
It is that the first and second features directly contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of
First feature horizontal height is higher than second feature.Fisrt feature can be under the second feature " below ", " below " and " below "
One feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that: not
A variety of change, modification, replacement and modification can be carried out to these embodiments in the case where being detached from the principle of the present invention and objective, this
The range of invention is defined by the claims and their equivalents.
Claims (11)
1. a kind of space charge measurement high-field electrode device characterized by comprising
Grounded metallic shield cover, the upper end closed and open at its lower end of the grounded metallic shield cover, the grounded metallic shield cover
It is interior to be equipped with partition, and under the partition limits superposed air insulating layer and is located in the grounded metallic shield cover
The resin insulating barrier in portion, and insulating resin is filled in the resin insulating barrier, the grounded metallic shield cover includes top cover, institute
It is openable for replacing the insulating resin to state top cover；
At least part of high-pressure metal electrode, the high-pressure metal electrode is located in the resin insulating barrier；
High voltage direct current insulating sleeve, the high voltage direct current insulating sleeve are in the tubulose vertically extended, the high voltage direct current
Insulating sleeve sequentially pass through the roof of the grounded metallic shield cover from top to bottom and the partition to extend into the resin exhausted
In edge layer；
High voltage direct current conducting rod, the high voltage direct current conducting rod are located in the high voltage direct current insulating sleeve and prolong along the vertical direction
It extends to and is connect with the high-pressure metal electrode；
High-voltage pulse insulating sleeve, the high-voltage pulse insulating sleeve is in hollow tubular, and the high-voltage pulse insulating sleeve is worn
The grounded metallic shield cover outer wall is crossed to extend into the air insulating layer；
High-voltage pulse conducting rod, the high-voltage pulse conducting rod are located in the high-voltage pulse insulating sleeve；
Internal circuit, the internal circuit are connected with the high-voltage pulse conducting rod and the high-pressure metal electrode respectively.
2. space charge measurement according to claim 1 high-field electrode device, which is characterized in that the grounded metal screen
The lower section for covering cover is equipped with the grounding plate being spaced apart with the grounded metallic shield cover for accepting sample.
3. space charge measurement according to claim 1 high-field electrode device, which is characterized in that the high-pressure metal electricity
The lower end of pole extends downwardly the lower end surface of the grounded metallic shield cover, and the lower end of the high-pressure metal electrode be equipped with it is described
The semi-conductive layer of the lower end surface fitting of high-pressure metal electrode.
4. space charge measurement according to claim 1 high-field electrode device, which is characterized in that the internal circuit packet
Resistance and capacitor are included, one end of the capacitor is connected with the resistance and the high-voltage pulse conducting rod respectively, and the capacitor
The other end be connected with the high-pressure metal electrode, the other end of the resistance connects the grounded metallic shield cover.
5. space charge measurement according to claim 4 high-field electrode device, which is characterized in that the resistance is located at institute
It states in air insulating layer, and the capacitor is packaged in the resin insulating barrier.
6. space charge measurement according to claim 1 high-field electrode device, which is characterized in that the high-voltage pulse is exhausted
Edge casing is in hollow cylindrical shape.
7. space charge measurement according to claim 1 high-field electrode device, which is characterized in that the high-voltage pulse is exhausted
Edge casing is located at the top on the peripheral wall of the grounded metallic shield cover and being located at the partition.
8. space charge measurement according to claim 1 high-field electrode device, which is characterized in that the high voltage direct current is exhausted
Edge casing is cylindrical hollow structure, and the high voltage direct current insulating sleeve is vertically inserted from the roof center of the grounded metallic shield cover
After entering and passing through the air insulating layer and the partition, in the top phase of the resin insulating barrier and the high-pressure metal electrode
Even.
9. space charge measurement according to claim 1 high-field electrode device, which is characterized in that the air insulating layer
Inner peripheral surface with the resin insulating barrier is in the cylindrical shape vertically extended, and the air insulating layer inner peripheral surface
Radial dimension is less than the resin insulating barrier inner peripheral surface radial dimension, the inner peripheral surface of the air insulating layer and the insulation resin
Step surface is connected between the inner peripheral surface of layer, the step surface is in annular directed downwardly, and the partition is against on the step surface.
10. space charge measurement according to claim 1 high-field electrode device, which is characterized in that the grounded metal
Shielding case includes grounded metal annulus, and the grounded metal annulus is in the hollow straight-tube shape vertically extended, the top cover
Close the upper end of the grounded metal annulus.
11. space charge measurement according to claim 10 high-field electrode device, which is characterized in that the top cover it is upper
There are two the symmetrical and not perforative hemisphere grooves about centre bore on surface.
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| CN106249064B (en) * | 2016-07-12 | 2019-05-31 | 清华大学 | Insulate self-recovering type space charge measurement high-field electrode device |
| CN109991482A (en) * | 2017-12-29 | 2019-07-09 | 上海交通大学 | The simulation electrode device of cable insulation space charge detection |
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