CN204441009U - A kind of ultrahigh-pressure gas insulated composite bushing - Google Patents
A kind of ultrahigh-pressure gas insulated composite bushing Download PDFInfo
- Publication number
- CN204441009U CN204441009U CN201520132937.4U CN201520132937U CN204441009U CN 204441009 U CN204441009 U CN 204441009U CN 201520132937 U CN201520132937 U CN 201520132937U CN 204441009 U CN204441009 U CN 204441009U
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- Prior art keywords
- electric capacity
- conductor
- ring
- sleeve pipe
- stress cone
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- Expired - Fee Related
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Abstract
The utility model discloses a kind of ultrahigh-pressure gas insulated composite bushing, comprise radome (1), outlet row (2), seal cover board (3), conductor (4), sleeve pipe (5), electric field controls module, base plate (9) and lower radome (10).The utility model makes inside pipe casing field strength distribution more reasonable by electric field controls module, and make sleeve pipe appearance field intensity reduce about 25%, product structure is reliable and stable, easy for installation.
Description
Technical field
The utility model relates to a kind of power equipment, particularly the ultrahigh-pressure gas insulated composite bushing of a kind of composite type.
Background technology
Insulating sleeve is for through a kind of insulator of electric conductor, as a kind of important insulating element, mainly builds and transformer, reactor, in the power equipments such as circuit breaker and body of wall, bears insulation against ground, supports and current-carrying function, apply very extensive.
The method that current 550kV gas-insulated composite bushing controls electric field mainly contains two kinds, adopts individual layer stress cone (shielding) to control electric field and double-layer stress cone (shielding) control electric field methods.
On double-layer shielding structure, defect is that the mode that is connected and fixed between two-layer shielding can claim to shielding profile, and the effect of impact shielding; Insulated support planform between shielding and requirement of strength high, need strict demonstration and experiment.Double-layer shielding structure, in transport, shielding often occurs in installation process and damages phenomenon, and Financial cost is high.
Single-layer shield structure is at haze, and dust, very easily produces partial discharge under the harsh weather such as heavy rain, and outer sudden strain of a muscle even occurs.
The utility model solves existing 550kV gas-insulated composite bushing Problems existing, obtains good economic and technical norms.
Utility model content
The utility model solves defect on the ultrahigh-pressure gas insulated composite bushing single-layer shield of 550kV and double-layer shielding structure and electric field controls and the contradiction between product structure and cost, provides a kind of structural solutions of 550kV gas-insulated composite bushing.
Its technical scheme is as follows:
A kind of ultrahigh-pressure gas insulated composite bushing, comprise radome, outlet row, seal cover board, conductor, sleeve pipe, electric field controls module, base plate and lower radome, wherein, electric field controls module comprises: stress cone, dead ring and electric capacity ring; Described electric capacity ring is connected by dead ring with stress cone; Sleeve pipe, stress cone, lower radome are installed on base plate; Upper radome, conductor are all connected with seal cover board, and seal cover board is arranged on cannula tip; Electric field controls module is enclosed within conductor, is arranged on inside pipe casing; Described electric field controls module is for controlling the inside and outside Electric Field Distribution of sleeve pipe.
Further, electric field controls module with coaxial structure installment at inside pipe casing.
Further, described conductor and electric capacity Zernike annular polynomial bore between relation meet following formula:
①C1/C2＝U1/U2②U1+U2＝U
C1 is electric capacity between conductor and electric capacity ring, and C2 is electric capacity between electric capacity ring and stress cone, and U1 is potential difference between conductor and electric capacity ring, and U2 is potential difference between electric capacity ring and stress cone, and U is conductor voltage to earth.
The beneficial effects of the utility model are as follows:
1, Electric Field Distribution is more reasonable, makes sleeve pipe appearance field intensity reduce about 25%.
2, product structure is reliable and stable, easy for installation.
Accompanying drawing explanation
Fig. 1 is structure chart of the present utility model;
Fig. 2 is the structure chart of electric field controls module of the present utility model.
Embodiment
The technical problem solved for making the utility model, technical scheme and advantage clearly, are described in detail below in conjunction with accompanying drawing.
The utility model inside pipe casing adopts high pressure SF6 gas-insulated, and jacket exterior adopts air insulation.As shown in Figure 1, ultrahigh-pressure gas insulated composite bushing of the present utility model, comprises radome 1, outlet row 2, seal cover board 3, conductor 4, sleeve pipe 5, electric field controls module, base plate 9 and lower radome 10.
Electric field controls module comprises: stress cone 8, dead ring 7 and electric capacity ring 6.
Electric capacity ring 6 is connected by dead ring 7 with stress cone 8; Sleeve pipe 5, stress cone 8, lower radome 10 are installed on base plate 9; Upper radome 1, outlet row 2, conductor 4 are all connected with seal cover board 3, and seal cover board is arranged on sleeve pipe 5 top; Electric field controls module is enclosed within conductor 4, is arranged on sleeve pipe 5 inner.
Electric field controls module is for controlling the inside and outside Electric Field Distribution of sleeve pipe 5.
Radome is for shielding exposed electrode.
By adjusting the profile of dead ring 7, at conductor 4, between electric capacity ring 6 and stress cone 8, forming different electric capacity, and get the voltage of different proportion on electric capacity ring 5.Described conductor 4, relation between electric capacity ring 6 and stress cone 8 meet following formula:
①C1/C2＝U1/U2②U1+U2＝U
C1 is electric capacity between conductor 4 and electric capacity ring 6, and C2 is electric capacity between electric capacity ring 6 and stress cone 8, and U1 is potential difference between conductor 4 and electric capacity ring 6, and U2 is potential difference between electric capacity ring 6 and stress cone 8, and U is conductor voltage to earth.
Electric capacity ring 6 and stress cone 8 are separated insulation by dead ring 7, make to form space electric capacity between conductor 4 electric capacity ring 6 and stress cone 8 three.The electric capacity C of capacitor and the area S of pole plate is directly proportional, and the spacing d of pole plate is inversely proportional to, relevant with the DIELECTRIC CONSTANT ε of the insulating material between pole plate, that is:
at Design Stage, by changing the shape of dead ring 7, the capacitance forming space capacitor between conductor 4 electric capacity ring 6 and stress cone 8 three can be changed, thus determine field strength distribution.
Electric capacity ring by stress cone top comparatively electronegative potential raise, external electric field is distributed and is tending towards comparatively even, strengthen composite bushing external insulation ability.Combined by optimizing stress cone 8, electric capacity ring 6 and dead ring 7, improve sleeve pipe Electric Field Distribution, reduce the inside and outside maximum field strength of sleeve pipe, promote the electric property of 550kV gas-insulated composite bushing.Electric capacity ring dividing potential drop is about 84kV, makes bushing outer surface tangential field be down to 0.39kV/mm by 0.5kV/mm, reduces about 25%.
The above is preferred implementation of the present utility model; it should be pointed out that for those skilled in the art, under the prerequisite not departing from principle described in this patent; can also make some improvements and modifications, these improvements and modifications also should be considered as the protection range of utility model.
Claims (3)
1. a ultrahigh-pressure gas insulated composite bushing, it is characterized in that, comprise radome (1), outlet row (2), seal cover board (3), conductor (4), sleeve pipe (5), electric field controls module, base plate (9) and lower radome (10), wherein
Electric field controls module comprises: stress cone (8), dead ring (7) and electric capacity ring (6);
Described electric capacity ring (6) is connected by dead ring (7) with stress cone (8); Sleeve pipe (5), stress cone (8), lower radome (10) are installed on base plate (9); Upper radome (1), conductor (4) are all connected with seal cover board (3), and seal cover board is arranged on sleeve pipe (5) top; Electric field controls module is enclosed within conductor (4), is arranged on sleeve pipe (5) inner.
2. composite bushing according to claim 1, is characterized in that, electric field controls module is inner at sleeve pipe (5) with coaxial structure installment.
3. composite bushing according to claim 1, is characterized in that, the relation between described conductor (4) and electric capacity ring (6) stress cone (8) meets following formula:
①C1/C2＝U1/U2 ②U1+U2＝U
C1 is electric capacity between conductor (4) and electric capacity ring (6), C2 is electric capacity between electric capacity ring (6) and stress cone (8), U1 is potential difference between conductor (4) and electric capacity ring (6), U2 is potential difference between electric capacity ring (6) and stress cone (8), and U is conductor voltage to earth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520132937.4U CN204441009U (en) | 2015-03-09 | 2015-03-09 | A kind of ultrahigh-pressure gas insulated composite bushing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520132937.4U CN204441009U (en) | 2015-03-09 | 2015-03-09 | A kind of ultrahigh-pressure gas insulated composite bushing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204441009U true CN204441009U (en) | 2015-07-01 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520132937.4U Expired - Fee Related CN204441009U (en) | 2015-03-09 | 2015-03-09 | A kind of ultrahigh-pressure gas insulated composite bushing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204441009U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104795189A (en) * | 2015-03-09 | 2015-07-22 | 江苏安靠智能输电工程科技股份有限公司 | Ultrahigh pressure gas insulating composite sleeve |
-
2015
- 2015-03-09 CN CN201520132937.4U patent/CN204441009U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104795189A (en) * | 2015-03-09 | 2015-07-22 | 江苏安靠智能输电工程科技股份有限公司 | Ultrahigh pressure gas insulating composite sleeve |
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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: 20150701 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |