CN106990333A - Large air gap discharge experimental rig under a kind of low pressure - Google Patents
Large air gap discharge experimental rig under a kind of low pressure Download PDFInfo
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- CN106990333A CN106990333A CN201611216108.XA CN201611216108A CN106990333A CN 106990333 A CN106990333 A CN 106990333A CN 201611216108 A CN201611216108 A CN 201611216108A CN 106990333 A CN106990333 A CN 106990333A
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- cavity
- air gap
- test
- discharge
- experimental rig
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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
- G01R31/1263—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 solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
-
- 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
- G01R31/16—Construction of testing vessels; Electrodes therefor
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention belongs to high voltage and insulation technology field, large air gap discharge experimental rig under more particularly to a kind of low pressure.The experimental rig mainly includes discharge test cavity, vacuum extractor, air pressure monitor device and high speed observation platform.The parts such as discharge test cavity is combined by outer chamber, reinforcement structure, inner bag, optics safety glass observation window, adjustable rod plate electrode system are constituted, cavity entirety nested form be reinforcement structure Combination Welding on the inside of the chamber outer wall, it is internal that inner bag is placed in reinforcement structure combination.Annexation between its each several part is：Test the atmospheric pressure value that cavity is connected with vacuum extractor and air pressure monitor device with control and stability test cavity respectively.The discharge process tested using high speed camera by a diameter of 150mm safety glass observation window large air gap discharge is recorded, so as to later stage research and analysis.The present invention provides test platform to carry out air pressure adjustable large air gap discharge experimental study in the range of 100Pa~0.1MPa.
Description
Technical field
The invention belongs to high voltage and insulation technology field, large air gap discharge experiment is filled under more particularly to a kind of low pressure
Put.
Background technology
Long air gap electric discharge is one of underlying issue that high-voltage engineering field is paid close attention to for a long time.Recent foreign scholar focuses on
In new electric discharge observation procedure and Study on Simulation Model, China then lays particular emphasis on project of transmitting and converting electricity gap discharge attribute testing, with regard to room
Experimental provision is the basis for carrying out discharge test research for interior research.
Recent domestic scholar have developed a series of electric discharge devices according to the research needs of oneself, come from making material
See and be divided into two classes, i.e. steel cavity and insulating materials cavity mostly.Although the steel cavity being made using stainless steel can be very
It is good guarantee smooth welded seam, smooth so that cavity has a good air-tightness, but with being ground in recent years to large air gap discharge
Study carefully the increase of size, the limitation that large air gap discharge is studied also further is increased indoors.Compared to steel cavity, in equal chi
Insulating materials cavity can realize the electric discharge of bigger rod plain gap distance under conditions of very little, therefore in research equal length gap discharge
Required insulating materials cavity is smaller compared to the effective radius of steel cavity during experiment, therefore from the perspective of economy
This experimental rig is even more ideal relative to other devices.
China western part has special geographical environmental condition, and its typical feature is that height above sea level, air pressure are low, and China west electricity east
2850m is reached and there is in high altitude localities, China's 750kV power transmission engineerings path highest height above sea level in south, north, the middle corridor sent, 90%
Qinghai-Tibet Railway in more than height above sea level 4000m, therefore high altitude localities the air gap flash-over characteristic be surpass, UHV Transmission Engineering it is anxious
One of key technology that need to be solved, it, which is studied, has huge economic value and social effect.But at present for High aititude
Area's outdoor insulative characteristic research is usually to carry out real model experiment at altitude test scene, and this way would generally expend huge
Human and material resources, and time cost input is excessive.Therefore this experimental rig provides flat for large air gap discharge experiment under low pressure
Platform, with important practical significance.
The content of the invention
Can in the range of 100Pa~0.1MPa in order to provide an air pressure to large air gap discharge experimental study under low pressure
Control, rod plain gap adjustable experimental rig in the range of 0~1000mm is put the invention provides long gap under a kind of low pressure
Electric test device.
Large air gap discharge experimental rig mainly includes experiment cavity, vacuum extractor, air pressure monitor dress under the low pressure
Put and high speed observation platform.
Annexation between its each several part is：Experiment cavity is connected with vacuum extractor and air pressure supervising device respectively
Connect.
Vacuum extractor uses vavuum pump, and experiment cavity is vacuumized using vacuum extractor, is long gap under low pressure
Discharge test is prepared.
Test cavity simultaneously with air pressure monitor device to be connected, air pressure monitor device combines realization with vent valve by vacuum meter,
The air pressure for testing cavity can in real time be monitored, and then control the atmospheric pressure value with stability test cavity.
High speed observation platform is made up of high speed camera and display screen, the safety glass that high speed camera passes through a diameter of 150mm
The discharge process that observation window is tested large air gap discharge is recorded, so as to later stage research and analysis.
The experiment cavity breaks through traditional steel material and selects insulating materials polypropylene as the making of experiment cavity
Material, although the steel cavity being made using stainless steel can ensure smooth welded seam well, smooth so that cavity has
Good air-tightness, but with the increase for studying large air gap discharge size in recent years, large air gap discharge is studied indoors
Limitation also further increase.Compared to steel cavity, under conditions of comparable size insulating materials cavity can realize more big stick-means of intimidation-
The electric discharge of sheet separation distance.In discharge test, the effective radius required for steel cavity is for insulating materials cavity
Much greater, economic performance is more superior.
It is described experiment cavity include outer chamber, reinforcement structure combination, inner bag, optics safety glass observation window, can adjust rod-
Plate electrode system, cavity entirety nested form be reinforcement structure Combination Welding on the inside of the chamber outer wall, inner bag is placed in reinforcement structure
Combination is internal.
It is described experiment the specific size of cavity be：Side wall effective depth is 1000mm, and sidewall thickness is 18mm, and upper low head is highly equal
For 325mm, a diameter of 1200mm of upper cover large flange, flange thickness is 20mm, the small flange diameter 100mm of cavity wall, thickness
Spend for 15mm.By dismantling polypropylene upper cover regulating rod plate electrode spacing to carry out discharge test.
The Circularhole diameter of the watch window is 150mm, is sealed using the good safety glass of high intensity, security, can
Discharge scenario in viewing test cavity.
The connector of vacuum extractor and the air pressure supervising device uses ball using threaded connection mouth, the valve of connector
Valve, the test cavity body can vacuum negative pressure resistant it is strong.
The vacuum extractor is connected by ball valve with vavuum pump.
The air pressure monitor device combines realization with vent valve by vacuum meter, with air pressure in real-time monitoring test cavity
Situation of change, can so realize the discharge test under meaning atmospheric pressure value in office under specific rod plain gap length, make easy to operate
It is easy.
Brief description of the drawings
Fig. 1 is large air gap discharge research device structural representation under the low pressure.
Fig. 2 is the cavity reinforcement structure schematic diagram.
Fig. 3 is the cavity inner-tube structure schematic diagram.
Fig. 4 is the low cavity engineering structure schematic diagram.
Fig. 5 is the experiment process figure of large air gap discharge research under the low pressure.
Embodiment
The invention provides large air gap discharge experimental rig under a kind of low pressure, with reference to the accompanying drawings and detailed description
The present invention will be further described.
Fig. 1 show the structural representation of large air gap discharge experimental rig under the low pressure, main to include experiment cavity,
Vacuum extractor, air pressure monitor device and high speed observation platform.
Fig. 2 show the engineering schematic diagram that large air gap discharge under the low pressure tests cavity.As shown in Fig. 2 electric discharge examination
Testing cavity includes outer chamber, reinforcement structure combination, inner bag, optics safety glass observation window, adjustable rod-plate electrode system, chamber
Body entirety nested form be reinforcement structure Combination Welding on the inside of the chamber outer wall, it is internal that inner bag is placed in reinforcement structure combination.
The specific size of cavity is：Side wall effective depth is 1000mm, and sidewall thickness is 18mm, and upper low head is highly
325mm, a diameter of 1200mm of upper cover large flange, flange thickness are 20mm, and the small flange diameter of cavity wall is 100mm, thick
Degree is 15mm.
By dismantling polypropylene upper cover regulating rod-plate electrode spacing to carry out discharge test.The circle of the watch window
Bore dia is 150mm, is sealed using the good safety glass of high intensity, security, can in viewing test cavity gas electric discharge
Situation.High-field electrode, using being threadedly coupled, is convenient for changing test electrode shape, to test different rod electrode pair with low-field electrode
The influence of Electric Field Distribution.Four-way pipe is connected at cavity low head, four-way bore is 20mm, and each connector of four-way pipe is distinguished
With vacuum extractor, means of deflation, vacuum measuring device is connected, and leaves a spare interface.Each connection of four-way pipe
Mouth, which is used, is threadedly coupled mouth, and the valve of vacuum extractor and means of deflation connector uses ball valve, makes discharge test cavity
Can vacuum negative pressure resistant it is strong.
Fig. 3 show the experiment process figure that large air gap discharge is studied under low pressure.First dismounting cavity upper cover is adjusted to conjunction
Suitable rod-plate spacing, then vacuumizes to experiment cavity, is evacuated to its limiting value, test the air-tightness of cavity, then air pressure is adjusted
To desired value, finally apply voltage on high-field electrode and tested, one group of test is carried out under each atmospheric pressure value, is completed specific
After one group of experiment of rod-plate electrode spacing, since regulating rod-plate electrode spacing, re-start above-mentioned behaviour vacuumizing again
Make.
Claims (4)
1. large air gap discharge experimental rig under a kind of low pressure, it is characterised in that：The experimental rig mainly includes discharge test chamber
Body, vacuum extractor, air pressure monitor device and high speed observation platform；The experiment cavity combines by outer chamber, reinforcement structure, interior
The parts such as courage, optics safety glass observation window, adjustable rod-plate electrode system are constituted, and cavity entirety nested form is to strengthen tying
Structure Combination Welding is on the inside of chamber outer wall, and it is internal that inner bag is placed in reinforcement structure combination；Annexation between its each several part is：Examination
Cavity is tested respectively with vacuum extractor and air pressure supervising device to be connected；Experiment cavity is vacuumized using vacuum extractor, is
Large air gap discharge experiment is prepared under low pressure；Test cavity simultaneously with air pressure monitor device to be connected, air pressure monitor device is by true
Sky meter and vent valve are combined, and the air pressure in test cavity body can be monitored in real time, and then are controlled and stability test cavity
Atmospheric pressure value.
2. large air gap discharge experimental rig under a kind of low pressure according to claim 1, it is characterised in that：The test cavity
Body breaks through conventional steel material and selects insulating materials polypropylene to be used as the making material of experiment cavity so that the experiment cavity
The discharge test of bigger rod plain gap distance can be realized under the conditions of comparable size.
3. large air gap discharge experimental rig under a kind of low pressure according to claim 1, it is characterised in that：The test cavity
Body includes discharge test electrode, and the electrode can quantify simultaneously including high pressure bar electrode and low pressure plate electrode and adjust high and low piezoelectricity
Clearance distance between pole.
4. large air gap discharge experimental rig under low pressure according to claim 1, the vacuum extractor and air pressure monitor
The connector of device uses ball valve using threaded connection mouth, the valve of connector, and vacuum extractor is connected with vavuum pump, air pressure prison
Control function combines realization with vent valve by vacuum meter, and the resistance to 100Pa~0.1MPa of test cavity physical efficiency negative pressure of vacuum is strong.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611216108.XA CN106990333A (en) | 2016-12-26 | 2016-12-26 | Large air gap discharge experimental rig under a kind of low pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611216108.XA CN106990333A (en) | 2016-12-26 | 2016-12-26 | Large air gap discharge experimental rig under a kind of low pressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106990333A true CN106990333A (en) | 2017-07-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611216108.XA Pending CN106990333A (en) | 2016-12-26 | 2016-12-26 | Large air gap discharge experimental rig under a kind of low pressure |
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| CN (1) | CN106990333A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109406961A (en) * | 2018-10-26 | 2019-03-01 | 华北电力大学 | A kind of power electronic devices insulation test device |
| CN111239567A (en) * | 2020-03-09 | 2020-06-05 | 华中科技大学 | Low-pressure long-gap discharge experimental device containing transient current measurement |
| CN111899611A (en) * | 2020-07-01 | 2020-11-06 | 国网山东省电力公司济南供电公司 | Insulating cavity for realizing discharge gap length larger than cavity radius |
| CN114355131A (en) * | 2022-03-21 | 2022-04-15 | 合肥航太电物理技术有限公司 | EWIS electric arc test device suitable for low atmospheric pressure environment |
-
2016
- 2016-12-26 CN CN201611216108.XA patent/CN106990333A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109406961A (en) * | 2018-10-26 | 2019-03-01 | 华北电力大学 | A kind of power electronic devices insulation test device |
| CN111239567A (en) * | 2020-03-09 | 2020-06-05 | 华中科技大学 | Low-pressure long-gap discharge experimental device containing transient current measurement |
| CN111239567B (en) * | 2020-03-09 | 2021-05-18 | 华中科技大学 | Low-pressure long-gap discharge experimental device containing transient current measurement |
| CN111899611A (en) * | 2020-07-01 | 2020-11-06 | 国网山东省电力公司济南供电公司 | Insulating cavity for realizing discharge gap length larger than cavity radius |
| CN114355131A (en) * | 2022-03-21 | 2022-04-15 | 合肥航太电物理技术有限公司 | EWIS electric arc test device suitable for low atmospheric pressure environment |
| CN114355131B (en) * | 2022-03-21 | 2022-05-17 | 合肥航太电物理技术有限公司 | EWIS electric arc test device suitable for low atmospheric pressure environment |
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| Date | Code | Title | Description |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170728 |
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| WD01 | Invention patent application deemed withdrawn after publication |