CN205959696U - Novel structure extra -high voltage or super high voltage direct current insulator - Google Patents
Novel structure extra -high voltage or super high voltage direct current insulator Download PDFInfo
- Publication number
- CN205959696U CN205959696U CN201620944048.2U CN201620944048U CN205959696U CN 205959696 U CN205959696 U CN 205959696U CN 201620944048 U CN201620944048 U CN 201620944048U CN 205959696 U CN205959696 U CN 205959696U
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- cylinder
- insulating cylinder
- high voltage
- flange
- insulator
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Abstract
The utility model discloses a novel structure extra -high voltage or super high voltage direct current insulator, including the insulating cylinder, set up at the last flange of insulating cylinder upper end and the setting lower flange at the insulating cylinder lower extreme, from top to bottom be equipped with a set of resistance unit in the insulating cylinder inboard, a single resistance unit includes and is equipped with flange upper end and flange lower extreme respectively at the both ends of glass steel drum by glass steel drum that the coiling has the varnished cloth resistance wire on glass steel drum, and varnished cloth resistance wire multilayer tiling coiling one -tenth parallelogram or trapezoidal solenoid, be equipped with insulating film between adjacent resistance elementary layer, it has the insulating gas to fill between insulating cylinder and glass steel drum. The utility model discloses make insulator surface voltage distribution even, can effectual release electric charge, avoided harmful ion mobility who discharges and be harmful, improved the electric property and the life of product.
Description
Technical field
This utility model patent is related to a kind of DC Insulator, specifically a kind of new structure extra-high voltage or supertension
DC Insulator.
Background technology
Present DC ultra-high-voltage and ultra-high voltage hollow insulating cylinder, when current－carrying conductor is passed through in inside, for example：Transformator set
Pipe (Fig. 1), GIS outlet casing tube (Fig. 2), wall bushing, in addition to surface electric field intensity vertically (Ea), also bigger radial direction
So that the field intensity at middle ground position is very big, easily there is flashover in field intensity (Er).
Content of the invention
The purpose of this utility model is to provide a kind of new structure extra-high voltage or superhigh voltage DC insulator, this D.C. isolation
Son makes hollow insulating cylinder be uniformly distributed along the field intensity on surface, it is to avoid harmful electric discharge and harmful ion migration, improves
The reliability of product and service life.
The purpose of this utility model patent is achieved through the following technical solutions：
A kind of new structure extra-high voltage or superhigh voltage DC insulator, including insulating cylinder, are arranged on the upper of insulating cylinder upper end
Flange and be arranged on insulating cylinder lower end lower flange it is characterised in that：From top to bottom it is provided with one group of resistance list inside insulating cylinder
Unit；Single resistance unit includes fiberglass cylinder, is respectively arranged at two ends with flange upper end and flange lower end in fiberglass cylinder,
Enamel-cover resistance wire is wound with fiberglass cylinder, and the tiling of enamel-cover resistance wire multilamellar turns to parallelogram or trapezoidal line
Bag；Adjacent resistor unit interlayer is provided with insulation film；It is filled with insulating gas between insulating cylinder and fiberglass cylinder.
Further, the internal diameter of insulating cylinder is adapted with the external diameter of fiberglass cylinder, and enamel-cover resistance wire is located at insulating cylinder
Between the external diameter of internal diameter and fiberglass cylinder.Described insulating cylinder is the hollow insulating cylinder of compound inslation or hollow insulator.
Enamel-cover resistance wire is constantan, nickel filament, start resistance wire and flange upper end short circuit, then uses coiling voltage transformer
Method tiling coiling, end resistance silk and flange lower end short circuit.Insulation film is dispensing thin film.Insulating gas is SF6Gas.
Each resistance unit is once loaded the inner side of Hollow Compound cylinder by this utility model, forms a resistance and meets design
The resistive conductor bag requiring.Each resistance unit is to be immersed in SF6In gas, so all of gap is all filled with SF6Insulation gas
Body.SF is also exactly used in wrapped end insulation6Gas-insulated, so whole line bag has reliable electric property.
Be consequently formed an insertion along the equally distributed resitstance voltage divider of side resistance in insulating cylinder.In DC voltage
Under, the DC voltage of inner surface is also just evenly distributed.Electric current Ir value due to flowing through resitstance voltage divider is significantly greater than outer surface
Leakage Current Io, has therefore also clamped down on the voltage's distribiuting of outer surface.
Compared with Traditional DC insulator, this utility model structural insulation is spiral helicine along insulation tube inner surface arrangement
Resistance wire, the voltage of inner surface is distributed by resistance completely, by the voltage of the voltage clamp outer surface of inner surface；In order to meet electricity
Resistance size, resistance is divided into several resistance units composition.Because of this current channel, insulator surface voltage can be made
It is evenly distributed, when high-pressure side has electrostatic charge to gather, can effectively discharge electric charge, it is to avoid harmful electric discharge and harmful
Ion migration, improves reliability and the service life of product.
This utility model can be used to manufacture DC bushing, including bushing shell for transformer, GIS outlet casing tube, GIL pipeline bus
Sleeve pipe, wall bushing；May also be used for pillar as disconnecting switch etc..This sleeve pipe both can be compound hollow insulation
Cylinder is it is also possible to use straight-cylindrical electric porcelain bushing.
Brief description
Fig. 1 is axial field intensity and the radial field schematic diagram of bushing shell for transformer in prior art.
Fig. 2 is axial field intensity and the radial field schematic diagram of GIS outlet casing tube in prior art.
Fig. 3 is structure of the present utility model and axial field intensity schematic diagram.
Fig. 4-1 is that in this utility model resistance unit, enamel-cover resistance wire is the schematic diagram of parallelogram sturcutre.
Fig. 4-2 is that in this utility model resistance unit, enamel-cover resistance wire is the schematic diagram of trapezium structure.
Specific embodiment
A kind of new structure extra-high voltage or superhigh voltage DC insulator, including insulating cylinder 2, are arranged on the upper of insulating cylinder upper end
Flange 1 and the lower flange 4 being arranged on insulating cylinder lower end, are from top to bottom provided with one group of resistance unit 3 inside insulating cylinder.Single electricity
Resistance unit includes fiberglass cylinder 31, is respectively arranged at two ends with flange upper end 32 and flange lower end 33, in glass in fiberglass cylinder
Enamel-cover resistance wire 5 is wound with glass steel cylinder, and the tiling of enamel-cover resistance wire multilamellar turns to parallelogram or trapezoidal line bag；
Adjacent resistor unit interlayer is provided with insulation film 6；It is filled with insulating gas 7 between insulating cylinder and fiberglass cylinder.Insulating cylinder
Internal diameter be adapted with the external diameter of fiberglass cylinder, and enamel-cover resistance wire is located at the external diameter of internal diameter and the fiberglass cylinder of insulating cylinder
Between.Insulating cylinder is the hollow insulating cylinder of compound inslation or hollow insulator.
This utility model arranges spiral helicine resistance wire in the inner surface of hollow insulating cylinder, and the voltage of inner surface is completely by electricity
Resistance distribution, by the voltage of the voltage clamp outer surface of inner surface.In order to realize this invention, a following difficult problem to be overcome.
1st, the electric current Ir (Fig. 3) flowing through resistance must be significantly larger than the Leakage Current flowing through outer surface, so just can clamp down on
The voltage's distribiuting of outer surface.And this electric current nor excessive, the caused temperature rise of the loss being produced by this electric current is suitable.Example
As：For the DC bushing of ± 1100kV, if total loss P is 5kW, the temperature rise of such sleeve pipe not over 20K, now
Electric current
By
Can obtain
Resistance R=242M Ω
Electric current I=4.6mA
In general, the height of the direct current Hollow Compound cylinder of 1100kV is 12m, and internal diameter is about 1m, even if
With very thin resistance wire, the resistance value of every meter of diameter phi 0.12mm- φ 0.2mm resistance wire is also only 30 Ω.
If then uniformly gathered along inner side, its maximum resistance is
Wherein：12000mm is that Hollow Compound cylinder is always high
1000mm is that the flange between compound inslation cylinder is always high
30 Ω are resistance values for every meter of resistance wire
1m is the diameter of composite hollow cylinder
0.2mm is the diameter of resistance wire
1.05 being coefficient
Obviously, any flat around mode be much not reach the requirement of resistance.Therefore；The skill supporting with this utility model
Art is a kind of winding method of resistance, and the interior side resistance of 12m length is divided into some units, the long 30cm of the every unit of example, then every unit
Sharing voltage is：
Every unit is made up of a fiberglass cylinder and corresponding bucking electrode, with enamel-cover resistance wire (constantan, nickel filament etc.
Resistance wire), start resistance wire 51 and flange upper end 32 short circuit, then use the method tiling coiling line bag of coiling voltage transformer,
Interlayer using the dispensing thin film of GIS voltage transformer, end resistance silk 52 and flange lower end 33 short circuit.
Because flange upper/lower terminal has the potential difference of 27.5kV, so the superiors and orlop resistance wire leave a 15mm left side
Right insulation distance, assumes uniform parallelogram or trapezoidal arrangement.
Each resistance unit is once loaded the inner side of Hollow Compound cylinder, form the resistance that a resistance meets design requirement
Line bag.Each resistance unit is to be immersed in SF6In gas, so all of gap is all filled with SF6Insulating gas.Wrapped
SF is also exactly used in end insulation6Gas-insulated, so whole line bag has reliable electric property.
Be consequently formed an insertion along the equally distributed resitstance voltage divider of side resistance in insulating cylinder.In DC voltage
Under, the DC voltage of inner surface is also just evenly distributed.Electric current Ir value due to flowing through resitstance voltage divider is significantly greater than outer surface
Leakage Current Io, has therefore also clamped down on the voltage's distribiuting of outer surface.
Because of this current channel, when high-pressure side has electrostatic charge to gather, can effectively discharge electric charge, it is to avoid
Harmful electric discharge and harmful ion migration, improve reliability and the service life of product.
Using this utility model, can be used to manufacture DC bushing, including bushing shell for transformer, GIS outlet casing tube, GIL pipe
Road bus casing, wall bushing；May also be used for pillar as disconnecting switch etc..This sleeve pipe both can be compound hollow
Insulating cylinder is it is also possible to use straight-cylindrical electric porcelain bushing.
If doing a tap in a last unit, can be mutual as DC voltage directly as resitstance voltage divider
Sensor uses.Potentiometer low pressure side resistance R2 can obtain any desired no-load voltage ratio according to the requirement design of change.
Claims (6)
1. a kind of new structure extra-high voltage or superhigh voltage DC insulator, including insulating cylinder（2）, be arranged on insulating cylinder（2）Upper end
Upper flange（1）Be arranged on insulating cylinder（2）The lower flange of lower end（4）It is characterised in that：In insulating cylinder（2）Inner side is by upper
Have one group of resistance unit（3）；Single resistance unit（3）Including fiberglass cylinder（31）, in fiberglass cylinder（31）Two
End is respectively equipped with flange upper end（32）With flange lower end（33）, in fiberglass cylinder（31）On be wound with enamel-cover resistance wire（5）, and
Enamel-cover resistance wire（5）Multilamellar tiling turns to parallelogram or trapezoidal line bag；Adjacent resistor unit（3）Interlayer is provided with insulation
Thin film（6）；In insulating cylinder（2）With fiberglass cylinder（31）Between be filled with insulating gas（7）.
2. new structure extra-high voltage according to claim 1 or superhigh voltage DC insulator it is characterised in that：Insulating cylinder
（2）Internal diameter and fiberglass cylinder（31）External diameter be adapted, and enamel-cover resistance wire（5）Positioned at insulating cylinder（2）Internal diameter and glass
Glass steel cylinder（31）External diameter between.
3. new structure extra-high voltage according to claim 1 or superhigh voltage DC insulator it is characterised in that：Described insulation
Cylinder（2）It is the hollow insulating cylinder of compound inslation or hollow insulator.
4. new structure extra-high voltage according to claim 1 or superhigh voltage DC insulator it is characterised in that：Enamel-cover resistance
Silk（5）It is constantan, nickel filament, resistance wire of starting（51）With flange upper end（32）Short circuit, then uses the side of coiling voltage transformer
Method tiling coiling, end resistance silk（52）With flange lower end（33）Short circuit.
5. new structure extra-high voltage according to claim 1 or superhigh voltage DC insulator it is characterised in that：Insulation film
（6）It is dispensing thin film.
6. new structure extra-high voltage according to claim 1 or superhigh voltage DC insulator it is characterised in that：Insulating gas
（7）It is SF6Gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620944048.2U CN205959696U (en) | 2016-08-25 | 2016-08-25 | Novel structure extra -high voltage or super high voltage direct current insulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620944048.2U CN205959696U (en) | 2016-08-25 | 2016-08-25 | Novel structure extra -high voltage or super high voltage direct current insulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205959696U true CN205959696U (en) | 2017-02-15 |
Family
ID=57980198
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620944048.2U Expired - Fee Related CN205959696U (en) | 2016-08-25 | 2016-08-25 | Novel structure extra -high voltage or super high voltage direct current insulator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205959696U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106205901A (en) * | 2016-08-25 | 2016-12-07 | 江苏智达高压电气有限公司 | A kind of new structure extra-high voltage or superhigh voltage DC insulator |
-
2016
- 2016-08-25 CN CN201620944048.2U patent/CN205959696U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106205901A (en) * | 2016-08-25 | 2016-12-07 | 江苏智达高压电气有限公司 | A kind of new structure extra-high voltage or superhigh voltage DC insulator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170215 Termination date: 20210825 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |