CN105785145A - DC GIL disc insulator surface charge density measurement and observation platform - Google Patents
DC GIL disc insulator surface charge density measurement and observation platform Download PDFInfo
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- CN105785145A CN105785145A CN201610169791.XA CN201610169791A CN105785145A CN 105785145 A CN105785145 A CN 105785145A CN 201610169791 A CN201610169791 A CN 201610169791A CN 105785145 A CN105785145 A CN 105785145A
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- 239000012212 insulator Substances 0.000 title claims abstract description 75
- 238000001739 density measurement Methods 0.000 title abstract description 3
- 238000012360 testing method Methods 0.000 claims abstract description 45
- 229910052751 metal Inorganic materials 0.000 claims abstract description 28
- 239000002184 metal Substances 0.000 claims abstract description 28
- 239000010453 quartz Substances 0.000 claims abstract description 16
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000005259 measurement Methods 0.000 claims abstract description 13
- 238000012029 structural testing Methods 0.000 claims description 29
- 239000000523 sample Substances 0.000 claims description 16
- 230000008520 organization Effects 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 12
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 8
- 229910052802 copper Inorganic materials 0.000 claims description 8
- 239000010949 copper Substances 0.000 claims description 8
- 238000009413 insulation Methods 0.000 claims description 5
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 230000007774 longterm Effects 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims 1
- 238000009825 accumulation Methods 0.000 abstract description 9
- 238000013461 design Methods 0.000 abstract description 3
- 238000011160 research Methods 0.000 abstract description 2
- 239000007787 solid Substances 0.000 abstract description 2
- 230000002596 correlated effect Effects 0.000 abstract 1
- 239000012774 insulation material Substances 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 238000003556 assay Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 230000005684 electric field Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002114 biscuit porcelain Inorganic materials 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000004441 surface measurement Methods 0.000 description 1
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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
- G01R29/24—Arrangements for measuring quantities of charge
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1245—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of line insulators or spacers, e.g. ceramic overhead line cap insulators; of insulators in HV bushings
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Abstract
The invention belongs to the field of high-voltage DC solid insulation material surface charge accumulation and surface flashover measurement, and particularly relates to a DC GIL disc insulator surface charge density measurement and observation platform, which is characterized in that two insulators separate a sealed metal cavity into three cavity rooms; the cavity room at the left side is connected with an external casing via a flange; a charge measurement device inside the cavity room above the right side is located above a coaxial cylindrical structure test device, a turning mechanism is fixed on the wall of the metal cavity, the coaxial cylindrical structure test device is connected with the turning mechanism via the support, a quartz window is arranged at the top of the cavity room, and a high-speed camera support and a high-speed camera are arranged outside the cover plate of the top flange; and each of the three cavity rooms is respectively provided with a valve with a barometer. The design is easy to realize, the operation is simple, and a reliable and effective test platform is provided for doing research on correlated characteristics between the disc insulator surface charge accumulation and surface flashover in the DC GIL.
Description
Technical field
The invention belongs to HVDC solid insulating material surface charge accumulation and edge flashing fields of measurement, particularly relate to a kind of direct current GIL disc insulator surface charge density and measure and observation platform.
Background technology
Gas-insulated metal closed power transmission line (GIL) has that transmission capacity is big, loss is little, electric capacity is little, takes up an area less, reliability is high, feature suitable in adverse circumstances, big at height above sea level drop, the occasion that landform, meteorological condition are severe or transmission line capability is big is widely applied.But at present, it is achieved commercial off-the-shelf is exchange GIL, direct current GIL but could not obtain scale application in Practical Project.Main cause is under DC voltage effect, and in direct current GIL, the surface charge accumulation of supports insulative is serious, has distorted along face Electric Field Distribution, has reduced the withstanding voltage of insulator.Particularly when HVDC Equipment polarity of voltage reverses, bring electric field distortion impact especially prominent.
It is intended to solve the electric field distortion problem that direct current GIL surface charge accumulation brings, it is necessary first to disc insulator surface Accumulating charge in direct current GIL is accurately measured, to study charge buildup characteristic.Since the eighties in 20th century, scholars expands for this problem and studies widely.The measuring method of current surface charge includes: bisque figure method, direct capacitance probe method, electrooptic effect method.Wherein direct capacitance probe method is to use wide method in current surface charge measurement field in the world, its principle is near charged insulator surface by a micro metal probe, due to electrostatic induction, probe, also by charged, Inversion Calculation can go out surface Charge density after measuring its sensitive surface charge density.
But at present, most research worker are only that direct current GIL surface Charge density is simply measured, do not carry out determining quantifier elimination to the surface flashover characteristics of insulator after surface charge accumulation, cannot setting up the associate feature between charge buildup and insulator edge flashing, therefore cannot the insulation optimization of direct current GIL be designed provides effective theoretical direction.Therefore it is badly in need of a kind of direct current GIL disc insulator surface charge density that carries out of invention to measure and the test platform of edge flashing observation.
Summary of the invention
In order to solve the problems referred to above, the present invention proposes a kind of direct current GIL disc insulator surface charge density and measures and observation platform, it is characterized in that, this platform includes metallic cavity 12, concentric cylinder structural testing setup, charge detecting device, edge flashing observation window, sleeve pipe 14, high pressure guide rod 13, high speed camera 17 and switching mechanism 6；
Described metallic cavity 12 is U-shaped sealing cavity, it is divided into three chambers by two insulators 11, wherein in the chamber of top, right side, concentric cylinder structural testing setup, charge detecting device and switching mechanism 6 are installed, charge detecting device is positioned at the top of concentric cylinder structural testing setup, concentric cylinder structural testing setup is connected with switching mechanism 6 by support 7, and switching mechanism 6 is fixedly installed on metallic cavity 12 wall；Quartz window sheet 8 is installed as edge flashing observation window in this chamber roof, and in the outside upper installation high speed camera support 9 of top flange cover plate 16, high speed camera 17 is installed on high speed camera support 9；Three chambers are separately installed with one and are with barometric valve 10；One end in the left chamber of the high pressure guide rod 13 in described metallic cavity 12 is connected with DC voltage generator 15 by flange and outer sleeve 14, and on the right side of high pressure guide rod 13, the other end in the chamber of top is connected on the metal guide rod 3 of concentric cylinder structural testing setup.
Described concentric cylinder structural testing setup includes metal shell 2, test disc insulator 1 and metal guide rod 3；Test disc insulator 1 is shaped as round table-like, and test disc insulator 1 both sides insulation distance is different, and a female thread copper insert is installed at the center of test disc insulator 1, and outside has uniformly processed 8 screwed holes；Metal shell 2 is divided into two sections, is separately mounted to the both sides of test disc insulator 1 by flange；Metal guide rod 3 is divided into two sections, is installed on the female thread copper insert both sides at test insulator center respectively through screw thread.
Described switching mechanism includes locating shaft 18, lifting rotating shaft 19, cam 20, upset rotating shaft 21, lower gear 22 and gear 23, for realizing concentric cylinder structural testing setup in 180 ° of upsets within metallic cavity 12, it is achieved the direct capacitance probe 4 surface charge measurement to test insulator 1 both sides；Its cam 20 is installed in lifting rotating shaft 19；Gear (23) is fixed in upset rotating shaft 21；Promote rotating shaft 19 and be fixedly installed in metallic cavity 12 with the middle part overturning rotating shaft 21 each through flange, be distributed up and down at same vertical curve；The part that upset rotating shaft 21 is positioned at inside metallic cavity 12 connects support 7 by locating shaft 18；One end of support 7 is installed on locating shaft 18 with the form of slide block, and locating shaft 18 is fixed with lower gear 22, and lower gear 22 and concentric cylinder structural testing setup can be driven freely to slide up and down；In its natural state, one end of support 7 keeps horizontal abutment with the long limit of cam 20；When cam 20 rotates to its extreme higher position, just lower gear 22 is made to be engaged with gear 23 height of support 7 jack-up, driving gear (23) to rotate by overturning rotating shaft 21, lower gear 22 also can rotate with, thus driving concentric cylinder structural testing setup to overturn together.
Described charge detecting device includes direct capacitance probe 4 and is fixed on three-dimensional motion controlling organization 5 by pole, and the Z axis of three-dimensional motion controlling organization 5 is then fixedly installed on metallic cavity 12 inwall.
Described metal shell 2 adopts aluminium alloy to make；Described test disc insulator 1 adopts epoxy resin to make, and is shaped as round table-like, and bevel angle is 10 °, and center thickness is 5mm, and basal diameter is 90mm；Described female thread copper insert external diameter 20mm.
Described metallic cavity 12 adopts rustless steel to make, and is resistant to the air pressure up to 0.5Mpa.
Described edge flashing observation window is 20mm by a thickness, the circular quartz window 8 that diameter is 120mm forms, this quartz window sheet 8 is installed on the chamber roof of top on the right side of metallic cavity 12 by flange plate 16 and seal with O ring, and the center of circle of the center of circle of quartz window sheet 8 and test disc insulator 1 is on a vertical line.
Described high speed camera 17 is for carrying out shooting record to test insulator edge flashing process.
Described DC voltage generator 15 is a digital DC voltage generator, and maximum output voltage 200kV provides the ripple factor < high voltage direct current of 0.3% steadily in the long term.
Beneficial effect
(1) concentric cylinder structural testing setup is carried out modularized design and is conducive to quick-replaceable test insulator after edge flashing experimentation, it is ensured that measurement data is accurately, reliably next time.
(2) by switching mechanism, test disc insulator is carried out 180 ° of upsets to achieve and only with a set of measurement system, the charge density of insulator both sides measure, test platform can be reduced and build cost and avoid because of the different impact on analysis result of the measurement error of different measuring system.
(3) realize direct current GIL disc insulator surface charge measurement and edge flashing observation by the design of integration, be conducive to the associate feature setting up insulator surface charge accumulation with edge flashing.
(4) Platform Designing of the present invention is easily achieved, simple to operate, and the associate feature for disc insulator surface charge accumulation in researching DC GIL Yu edge flashing provides test platform reliable, effective.
Accompanying drawing explanation
Fig. 1 is that a kind of direct current GIL disc insulator surface charge density provided by the invention is measured and edge flashing observation platform schematic diagram；
Fig. 2 is that a kind of direct current GIL disc insulator surface charge density provided by the invention is measured and the schematic diagram of switching mechanism in edge flashing observation platform.
1-tests disc insulator；2-metal shell；3-metal guide rod；4-direct capacitance is popped one's head in；5-three-dimensional motion controlling organization；6-switching mechanism；7-support；8-quartz window sheet；9-high speed camera support；10-is with barometric valve；11-insulator；12-metallic cavity；13-high pressure guide rod；14-sleeve pipe；15-DC voltage generator；16-flange plate；17-high speed camera；18-locating shaft；19-promotes rotating shaft；20-cam；21-overturns rotating shaft；22-lower gear；23-gear.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is elaborated.Fig. 1 is that a kind of direct current GIL disc insulator surface charge density provided by the invention is measured and edge flashing observation platform schematic diagram；This platform includes metallic cavity 12, concentric cylinder structural testing setup, charge detecting device, edge flashing observation window, sleeve pipe 14, high pressure guide rod 13, high speed camera 17 and switching mechanism 6.It is characterized in that: metallic cavity 12 is divided into 3 chambers by insulator 11, quartz window sheet 8 is installed at right chamber top, and high speed camera support 9 is installed on containment portion flange plate 16.Two sections of metal shells 2 are installed on test disc insulator 1 by flange, and two sections of metal guide rods 3 are installed in test disc insulator 1 in the heart by threaded insert, collectively form concentric cylinder structural testing setup.Concentric cylinder structural testing setup is connected with switching mechanism 6 by pole 7, and switching mechanism 6 is fixedly installed on metallic cavity 12 wall, metal guide rod 3 and metallic cavity 12 inner high voltage guide rod 13 good contact in assay device under resting state.Direct capacitance probe 4 is fixed on three-dimensional motion controlling organization 5 by pole 7, and the Z axis of three-dimensional motion controlling organization 5 is then fixedly installed on metallic cavity 12 inwall.High pressure guide rod 13 is fixed on the center of metallic cavity 12 by insulator 11；DC voltage generator 15 applies DC voltage by sleeve pipe 14 to high pressure guide rod 13.
Described metallic cavity 12 adopts rustless steel to make, and can tolerate up to 0.5Mpa air pressure.This metallic cavity 12 is divided into three chambers by insulator 11, and wherein left chamber is connected with outer sleeve 14 by flange.Concentric cylinder structural testing setup, charge detecting device, switching mechanism 6 and corresponding subsidiary combining member are installed in right chamber.Each chamber is provided with barometric valve 10, the SF6 of 0.5Mpa can be filled with in metallic cavity, simulate the insulation conditions of true GIL.
Described concentric cylinder structural testing setup includes metal shell 2, test disc insulator 1 and metal guide rod 2.Metal shell 2 adopts aluminium alloy to make.Test disc insulator 1 adopts epoxy resin to make, and is shaped as round table-like, and bevel angle is 10 °, and center thickness is 5mm, and basal diameter is 90mm.Test disc insulator 1 both sides insulation distance is different, it is ensured that edge flashing only occurs in fixing side.Be provided with the female thread copper insert that external diameter is 20mm at insulator 1 center, outside has uniformly processed 8 screwed holes.Metal shell 2 is divided into two sections, is separately mounted to test disc insulator 1 both sides by flange.Metal guide rod 3 is divided into two sections, is respectively arranged on the copper insert at test center, insulator 1 both sides.
Described charge detecting device includes direct capacitance probe 4, coaxial cable, three-dimensional motion controlling organization 5 and connector thereof.Coaxial cable one end is connected with direct capacitance probe 4 by bnc connector, and one end is installed on wire chamber body wall by flanged (FLGD) sealing bnc connector, it is simple to direct capacitance probe 4 measurement signals transmit on the detecting instrument to cavity.Direct capacitance probe 4 is fixedly installed in below three-dimensional motion controlling organization 5 by pole, and this controlling organization can drive direct capacitance probe 4 to test surface Charge density measurement.
Described edge flashing observation window is 20mm by a thickness, and the circular quartz window 8 that diameter is 120mm forms.This quartz window sheet 8 is installed on the top of the chamber of top on the right side of metallic cavity 12 by flange and seal with O ring.The center of circle guaranteeing quartz window sheet 8 when mounted is with the center of circle testing disc insulator 1 on one wire.Quartz window sheet 8 top is provided with high speed camera support 9, in order to test insulator edge flashing process is carried out shooting record by fixing high speed camera 17.
Described sleeve pipe 14 is installed on above the chamber on the left of metallic cavity 1, for high voltage power supply safely introduces metal guide rod 3.
Described high pressure guide rod 13 is by being fixed on insulator 11 and being installed on metallic cavity 12 center.High pressure guide rod 13 one end is connected with sleeve pipe 14, and the other end of high pressure guide rod 13 is connected with the metal guide rod 3 in concentric cylinder device.
Described high speed camera 17 is fixed on quartz window sheet top by high speed camera support 9, it is simple to the flashover process of test disc insulator upper surface is shot.
In the switching mechanism schematic diagram shown in Fig. 2, described switching mechanism includes locating shaft 18, cam 20, lifting rotating shaft 19, gear 23, lower gear 22 and upset rotating shaft 21, for realizing the concentric cylinder structural testing setup being provided with test disc insulator in 180 ° of upsets within metallic cavity so that the direct capacitance probe 4 surface charge measurement to test insulator 1 opposite side.Its cam 20 and lifting rotating shaft 19 promote for the position before realizing concentric cylinder device upset, it is ensured that upset hinders without other devices on path；Locating shaft 18 is used for guaranteeing that concentric cylinder structural testing setup keeps vertical state in lifting process；Gear 23, lower gear 22 and upset rotating shaft 21 are for realizing 180 ° of upsets after assay device is promoted to upset point.Promoting rotating shaft 19 one end to be connected with cam 20, upset rotating shaft 21 one end is connected with gear 23, and two rotating shaft other ends stretch out outside cavity respectively through flange, in order to external manual manipulation.Switching mechanism 6 is fixedly installed in metallic cavity inwall, and concentric cylinder structural testing setup is fixed on switching mechanism 6 by support 7.
Platform concrete operation step provided by the present invention is as follows:
1, when not applying DC voltage, it is respectively connected to vacuum pump be with on barometric valve 10, three chambers is evacuated to vacuum respectively and reaches-50Kpa.In chamber, then it is filled with the SF6 of 0.5Mpa respectively.
2, turn on the power switch, raise the output voltage of DC voltage generator 15 to+60kV, until insulator surface charge accumulation saturation time.
3, DC voltage generator 15 is disconnected.
4, start three-dimensional motion controlling organization 5, drive direct capacitance probe 4 near test 2mm place, disc insulator 1 surface, surface charge density is measured.Based on the programmable functions of three-dimensional motion controlling organization 5, according to preset path, the charge density on the upside of test insulator 1 is carried out full surface measurement, and record, preserve measurement data.
5, three-dimensional motion controlling organization 5 is started, 4 removal concentric cylinder structural testing setups of direct capacitance being popped one's head in.
6, pass through to rotate and upgrade rotating shaft 19 and rotate cam 20 thus jack-up concentric cylinder structural testing setup moves upward along locating shaft 18.When rising to predeterminated position, lower gear 22 is just engaged with gear 23.
7, rotating upset rotating shaft 21 drives gear 23 to rotate the upset realizing test insulator 1.Self gravitation is then relied on to make assay device along locating shaft 18 automatic descending.
8, start three-dimensional motion controlling organization 5, be repeated in the 4th, the 5th step.
9, start high speed camera 17, and regulate to automatic trigger mode.
10, turn on the power switch, quickly raise the output voltage of DC voltage generator 15 until edge flashing occurs test disc insulator 1.
11, record flashover voltage, preserves the high speed camera 17 shooting image to edge flashing process.
Claims (9)
1. a direct current GIL disc insulator surface charge density is measured and observation platform, it is characterized in that, this platform includes metallic cavity (12), concentric cylinder structural testing setup, charge detecting device, edge flashing observation window, sleeve pipe (14), high pressure guide rod (13), high speed camera (17) and switching mechanism (6)；
Described metallic cavity (12) is U-shaped sealing cavity, it is divided into three chambers by two insulators (11), wherein in the chamber of top, right side, concentric cylinder structural testing setup, charge detecting device and switching mechanism (6) are installed, charge detecting device is positioned at the top of concentric cylinder structural testing setup, concentric cylinder structural testing setup is connected with switching mechanism (6) by support (7), and switching mechanism (6) is fixedly installed on metallic cavity (12) wall；Quartz window sheet (8) is installed as edge flashing observation window in this chamber roof, and high speed camera support (9) is installed on top flange cover plate (16) outside, high speed camera (17) is installed on high speed camera support (9)；Three chambers are separately installed with one and are with barometric valve (10)；One end in the left chamber of the high pressure guide rod (13) in described metallic cavity (12) is connected with DC voltage generator (15) by flange and outer sleeve (14), and the other end in the chamber of top, high pressure guide rod (13) right side is connected on the metal guide rod (3) of concentric cylinder structural testing setup.
2. a kind of direct current GIL disc insulator surface charge density according to claim 1 is measured and edge flashing observation platform, it is characterized in that, described concentric cylinder structural testing setup includes metal shell (2), test disc insulator (1) and metal guide rod (3)；Test disc insulator (1) is shaped as round table-like, and test disc insulator (1) both sides insulation distance is different, a female thread copper insert is installed at the center of test disc insulator (1), and outside has uniformly processed 8 screwed holes；Metal shell (2) is divided into two sections, is separately mounted to the both sides of test disc insulator (1) by flange；Metal guide rod (3) is divided into two sections, is installed on the female thread copper insert both sides at test insulator center respectively through screw thread.
3. a kind of direct current GIL disc insulator surface charge density according to claim 1 is measured and observation platform, it is characterized in that, described switching mechanism includes locating shaft (18), lifting rotating shaft (19), cam (20), upset rotating shaft (21), lower gear (22) and gear (23), for realizing the 180 ° of upsets in metallic cavity (12) inside of the concentric cylinder structural testing setup, it is achieved direct capacitance probe (4) surface charge measurement to test insulator (1) both sides；Its cam (20) is installed in lifting rotating shaft (19)；Gear (23) is fixed in upset rotating shaft (21)；Promote rotating shaft (19) to be fixedly installed in metallic cavity (12) each through flange with the middle part overturning rotating shaft (21), be distributed up and down at same vertical curve；Upset rotating shaft (21) is positioned at the part of metallic cavity (12) inner side and connects support (7) by locating shaft (18)；One end of support (7) is installed on locating shaft (18) with the form of slide block, locating shaft (18) is fixed with lower gear (22), lower gear (22) and concentric cylinder structural testing setup can be driven freely to slide up and down；In its natural state, one end of support (7) keeps horizontal abutment with the long limit of cam (20)；When cam (20) rotates to its extreme higher position, just lower gear (22) is made to be engaged with gear (23) height of support (7) jack-up, gear (23) is driven to rotate by overturning rotating shaft (21), lower gear (22) also can rotate with, thus driving concentric cylinder structural testing setup to overturn together.
4. a kind of direct current GIL disc insulator surface charge density according to claim 1 is measured and observation platform, it is characterized in that, described charge detecting device includes direct capacitance probe (4) and is fixed on three-dimensional motion controlling organization (5) by pole, and the Z axis of three-dimensional motion controlling organization (5) is then fixedly installed on metallic cavity (12) inwall.
5. a kind of direct current GIL disc insulator surface charge density is measured and observation platform according to claim 1, it is characterised in that described metal shell (2) adopts aluminium alloy to make；Described test disc insulator (1) adopts epoxy resin to make, and is shaped as round table-like, and bevel angle is 10 °, and center thickness is 5mm, and basal diameter is 90mm；Described female thread copper insert external diameter 20mm.
6. a kind of direct current GIL disc insulator surface charge density is measured and observation platform according to claim 1, it is characterised in that described metallic cavity (12) adopts rustless steel to make, and is resistant to the air pressure up to 0.5Mpa.
7. a kind of direct current GIL disc insulator surface charge density is measured and observation platform according to claim 1, it is characterized in that, described edge flashing observation window is 20mm by a thickness, diameter is circular quartz window (8) composition of 120mm, this quartz window sheet (8) is installed on the chamber roof of top, metallic cavity (12) right side by flange plate (16) and seal with O ring, and the center of circle of the center of circle of quartz window sheet (8) and test disc insulator (1) is on a vertical line.
8. a kind of direct current GIL disc insulator surface charge density is measured and observation platform according to claim 1, it is characterised in that described high speed camera (17) is for carrying out shooting record to test insulator edge flashing process.
9. a kind of direct current GIL disc insulator surface charge density is measured and observation platform according to claim 1, it is characterized in that, described DC voltage generator (15) is a digital DC voltage generator, maximum output voltage 200kV, provides the ripple factor < high voltage direct current of 0.3% steadily in the long term.
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| CN201610169791.XA CN105785145B (en) | 2016-03-23 | 2016-03-23 | Direct current GIL disc insulator surface charge densities measure and observation platform |
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| CN111505463A (en) * | 2020-05-28 | 2020-08-07 | 国家电网有限公司 | Device and method for measuring charge distribution of front and back surfaces of surface flashover of basin-type insulator |
| CN111766457A (en) * | 2020-05-25 | 2020-10-13 | 湖南大学 | GIL insulator surface charge on-line monitoring system based on electrostatic probe |
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| CN111896605B (en) * | 2020-06-22 | 2022-01-21 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | GIL equipment three-support insulator surface charge measuring device and test method thereof |
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