CN2896458Y - Insulator chain pressure-homogenizing structure for super-high-tension power-transmission line - Google Patents
Insulator chain pressure-homogenizing structure for super-high-tension power-transmission line Download PDFInfo
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- CN2896458Y CN2896458Y CN 200620022928 CN200620022928U CN2896458Y CN 2896458 Y CN2896458 Y CN 2896458Y CN 200620022928 CN200620022928 CN 200620022928 CN 200620022928 U CN200620022928 U CN 200620022928U CN 2896458 Y CN2896458 Y CN 2896458Y
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- insulator
- grading ring
- transmission line
- laminated structure
- connection
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Abstract
The utility model discloses an insulator-chain equalizing structure for the EHV power transmission line, comprising an insulator chain which has one end connected with the pole tower through the tower-connecting hardware and the other end connected with a lead. The insulator chain is mounted with an equalizing ring; the equalizing ring is on a plane perpendicular to the insulator chain; the intermediate diameter plane of the equalizing ring is located between the third and the fourth insulators on the side of the insulator chain closer to the lead. The insulator-chain equalizing structure herein deals with the problem with voltage distribution on the insulator chain of the EHV power transmission line and protects the insulator from being broken through.
Description
Technical field
The utility model belongs to the high pressure overhead power line technology, is specifically related to a kind of UHV transmission line with the equal laminated structure of insulator string.
Background technology
Insulator string is owing to be subjected to the influence of shaft tower and arrangement of conductors electric capacity, and the spread voltage under alternating voltage is inhomogeneous, grading ring need be set on insulator string come the voltage of uniform insulation substring to distribute, thereby avoid insulator breakdown.Usually in the extra high voltage network of 500kV～750kV, voltage ratio shaft tower side that several insulators of lead side are born and middle insulator sheet want high, grading ring is placed on its " plane, middle footpath " can reaching the effect of all pressing near the position between first insulator of lead side and second insulator, " plane, middle footpath " is meant the plane that grading ring is radially maximum.But UHV transmission line for 1000kv, want high a lot of near other insulator sheet of voltage ratio that several insulator sheets of lead side are born, if still with grading ring be placed on wherein the plane, footpath between near first insulator of lead side and second insulator then can not fine even voltage, still can puncture the situation of insulator.
The utility model content
The purpose of this utility model is the problem at above-mentioned existence, provides UHV transmission line that a kind of voltage that can be good at the uniform insulation substring distributes with the equal laminated structure of insulator string.
To achieve these goals, the utility model provides following technical scheme: a kind of UHV transmission line is with the equal laminated structure of insulator string, comprise the insulator connection, an end of described insulator connection is connected with shaft tower by connecting the tower gold utensil, and the other end is connected with lead by the line gold utensil; Described insulator connection is provided with grading ring, and the plane at described grading ring place join perpendicular to described insulator, and the plane, middle footpath of described grading ring is between close the 3rd insulator of lead side of described insulator connection and the 4th insulator.
The cross section of described grading ring is circular, and the caliber of grading ring is 100mm to 140mm, preferred 120mm.
The axis of described insulator connection and the minimum range of described grading ring are 400mm to 600m, preferred 500mm.
The connection number of described insulator connection is one to four.
Described grading ring is bolted on the line gold utensil by the linking arm that is welded on the ring body, and linking arm is two to six.
Technique scheme of the present utility model has the following advantages compared to existing technology: (1) grading ring of the present utility model is placed on wherein the plane, footpath between near the 3rd insulator of lead side and the 4th insulator, prove that by experiment this placement can be good at solving the voltage distribution problem on the insulator connection in the UHV transmission line, avoids insulator breakdown.(2) the utility model through experiment draw when the caliber of grading ring between the 100mm to 140mm the time, particularly the effect of all pressing 120mm the time is better.(3) the utility model through experiment draw when the distance of the axis of insulator connection and grading ring between the 400mm to 600mm the time, the effect of particularly all pressing in 500mm is better.
Description of drawings
Fig. 1 is the front view of the equal laminated structure of a kind of tetrad strain insulator string of the present utility model;
Fig. 2 is the upward view of Fig. 1.
Embodiment
Embodiment 1 (the equal laminated structure of simply connected suspension insulator)
The insulator string of present embodiment adopts the simply connected insulator to form the simply connected suspension insulator.
One side of the close shaft tower of this simply connected insulator connects the tower gold utensil by one group and is connected on the shaft tower, and another side links to each other with the wire clamp of clamping Ultra-high Voltage Wire by the line gold utensil.
A grading ring is bolted on the connecting plate gold utensil by four linking arms that are welded on the ring body, and the plane at this grading ring place is perpendicular to the simply connected insulator, and the plane, middle footpath of this grading ring is between near the 3rd insulator of lead side and the 4th insulator.The cross section of the grading ring of present embodiment is circular, and the caliber of grading ring (being cross-sectional diameter) is 120mm.Grading ring is an annulus, and the axis of simply connected insulator and the minimum range of grading ring (being the internal diameter of annulus in the present embodiment) are 500mm.
The effect of the equal laminated structure of insulator string of present embodiment is described below by table 1 to table 3, all pressures effect of general insulator string can be born voltage and monolithic maximum by the monolithic maximum and be born voltage percentage and characterize, and wherein the more little explanation of numerical value all presses effect good more.
Table 1
| The position on the plane, middle footpath of grading ring | The monolithic maximum is born voltage (kV) | The monolithic maximum voltage bears percentage (%) |
| Between first and second | 30.25 | 5.59 |
| Between second and the 3rd | 28.89 | 5.01 |
| Between the 3rd and the 4th | 27.05 | 4.69 |
| Between the 4th and the 5th | 26.87 | 4.64 |
| Between the 5th and the 6th | 26.76 | 4.58 |
The grading ring that each experiment is adopted in the table 1 is all the same.As shown in Table 1, along with the plane, middle footpath of grading ring is more and more far away from lead, all press effect good more, but the position of all pressing effect and grading ring of the plane, middle footpath of grading ring between the 3rd insulator of lead side and the 4th insulator is more or less the same away from all pressures effect of lead again, the more close lead side of chosen position can reduce tripping rate with lightning strike so in this case.
Table 2
| Grading ring caliber (mm) | The monolithic maximum is born voltage (kV) | The monolithic maximum voltage bears percentage (%) |
| 80 | 30.16 | 5.25 |
| 100 | 28.29 | 4.92 |
| 120 | 27.05 | 4.69 |
| 140 | 26.21 | 4.56 |
| 160 | 26.02 | 4.51 |
As shown in Table 2, along with the grading ring caliber strengthens, all press effect good more, but when caliber during greater than 120mm, the all pressures effect that increases with caliber is no longer obvious again, so caliber is that the grading ring of 120mm can also be saved cost reaching under the situation of all pressing effect preferably.
Table 3
| The beeline (mm) of insulator connection axis and grading ring | The monolithic maximum is born voltage (kV) | The monolithic maximum voltage bears percentage (%) |
| 300 | 30.60 | 5.29 |
| 400 | 27.85 | 4.92 |
| 500 | 27.05 | 4.69 |
| 600 | 27.29 | 4.73 |
| 700 | 27.87 | 4.89 |
As shown in Table 3, when the beeline of the axis of insulator connection and grading ring is 500mm, all press effect best.
Embodiment 2 (the equal laminated structure of tetrad strain insulator string)
See Fig. 1 and Fig. 2, the insulator string of present embodiment adopts the insulator 1 that tetrad is identical and two ends are concordant to form the tetrad strain insulator string, and to being arranged in squares, the distance between the axis of two insulators 1 is 600mm to this tetrad insulator 1 in spatial axes.
One side of tetrad insulator 1 close shaft tower connects tower gold utensil 2 by two groups and is connected on the shaft tower, another side links to each other with lead by the line gold utensil, the line gold utensil of present embodiment comprises connecting plate gold utensil 3, yoke plate 4 and hanging wire gold utensil 5, one end of yoke plate 4 is connected with tetrad insulator 1 by two groups of connecting plate gold utensils 3, and the other end of yoke plate 4 links to each other by the wire clamp 6 of eight groups of hanging wire gold utensils 5 with eight groups of difference clamping Ultra-high Voltage Wire.
A grading ring 7 is bolted on the connecting plate gold utensil 3 by four linking arms 8 that are welded on the ring body, the plane at these grading ring 7 places is perpendicular to tetrad insulator 1, and the plane, middle footpath of this grading ring 7 is between near the 3rd insulator 9 of lead side and the 4th insulator 10.The cross section of the grading ring 7 of present embodiment is circular, and the caliber of grading ring 7 (being cross-sectional diameter) is 120mm.Grading ring 7 is an annulus, and the internal diameter of annulus is 924.2mm, and the minimum range of the axis of every insulator 1 and grading ring 7 all is 500mm.
The equal laminated structure of this tetrad strain insulator string can make the most close lead side insulator sheet bear voltage percentage to drop to 3.9% from 7.9%, and monolithic bears voltage and drops to 23.5kV from 46.3kV, all presses effect fine.
Embodiment 3 (the equal laminated structure of duplex suspension insulator)
The insulator string of present embodiment adopts the parallel placement of two insulators to form the duplex suspension insulator.Distance between the axis of two insulators is 600mm.
One side of the close shaft tower of duplex insulator connects the tower gold utensil by one group and is connected on the shaft tower, and another side links to each other with the wire clamp of clamping Ultra-high Voltage Wire by the line gold utensil.
A grading ring is bolted on the line gold utensil by four linking arms that are welded on the ring body, the plane at this grading ring place is perpendicular to the duplex insulator, and the plane, middle footpath of this grading ring is between the insulator connection is near the 3rd insulator of lead side and the 4th insulator.The cross section of the grading ring of present embodiment is circular, and the caliber of grading ring (being cross-sectional diameter) is 120mm.The shape of grading ring is similar to the football field, and the distance between grading ring two minor faces is 1000mm, and the longest diameter of grading ring is 1600mm, and the axis of every insulator and the minimum range of grading ring all are 500mm.
The equal laminated structure of this duplex suspension insulator can make the most close lead side insulator sheet bear voltage percentage to drop to 4.7% from 9.1%, and monolithic bears voltage and drops to 26.8kV from 51.3kV, all presses effect fine.
Embodiment 4 (the equal laminated structure of V-type suspension insulator)
The insulator string of present embodiment adopts two insulators vertically to place composition V-type duplex suspension insulator.
One side of the close shaft tower of duplex insulator connects the tower gold utensil by two groups and is connected on the shaft tower, and another side links to each other with the wire clamp of clamping Ultra-high Voltage Wire by the line gold utensil.
A grading ring all is set on every insulator, two grading rings are bolted on the line gold utensil by four linking arms that are welded on the ring body, the plane at two grading ring places is all perpendicular to separately insulator connection, and the plane, middle footpath of two grading rings is also all between every insulator is near the 3rd insulator of lead side and the 4th insulator.The cross section of two grading rings of present embodiment all is circular, and the caliber of grading ring (being cross-sectional diameter) all is 120mm.Two grading rings all are annulus,, the axis of every insulator all is 500mm with the minimum range (being the internal diameter of two grading rings at present embodiment) of grading ring separately.The equal laminated structure of this V-type suspension insulator can make the most close lead side insulator sheet bear voltage percentage to drop to 5.0% from 10.5%, and monolithic bears voltage and drops to 28.52kV from 60.0kV, all presses effect fine.
Obviously, the foregoing description of the present utility model only is for the utility model example clearly is described, and is not to be qualification to execution mode of the present utility model.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give exhaustive to all execution modes.And these belong to conspicuous variation or the change that spirit of the present utility model extended out and still are among the protection range of the present utility model.
Claims (8)
1, a kind of UHV transmission line comprises insulator connection (1) with the equal laminated structure of insulator string, and an end of described insulator connection (1) is connected with shaft tower by connecting tower gold utensil (2), and the other end is connected with lead by the line gold utensil; It is characterized in that: described insulator connection (1) is provided with grading ring (7), the plane at described grading ring (7) place joins (1) perpendicular to described insulator, and the plane, middle footpath of described grading ring (7) is positioned at described insulator connection (1) near between the 3rd insulator of lead side (9) and the 4th insulator (10).
2, UHV transmission line according to claim 1 is characterized in that with the equal laminated structure of insulator string: the cross section of described grading ring (7) is for circular, and the caliber of grading ring (7) is 100mm to 140mm.
3, UHV transmission line according to claim 2 is with the equal laminated structure of insulator string, and it is characterized in that: the diameter of the caliber of described grading ring (7) is 120mm.
4, UHV transmission line according to claim 1 is characterized in that with the equal laminated structure of insulator string: the axis of described insulator connection (1) and the minimum range of described grading ring (7) are 400mm to 600m.
5, UHV transmission line according to claim 4 is characterized in that with the equal laminated structure of insulator string: the axis of described insulator connection (1) and the minimum range of described grading ring (7) are 500mm.
6, according to the described UHV transmission line of one of claim 1 to 5 with the equal laminated structure of insulator string, it is characterized in that: the connection number of described insulator connection (1) is one to four.
7, UHV transmission line according to claim 6 is with the equal laminated structure of insulator string, and it is characterized in that: described grading ring (7) is bolted on the line gold utensil by the linking arm (8) that is welded on the ring body.
8, UHV transmission line according to claim 7 is with the equal laminated structure of insulator string, and it is characterized in that: described linking arm (8) is two to six.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620022928 CN2896458Y (en) | 2006-04-24 | 2006-04-24 | Insulator chain pressure-homogenizing structure for super-high-tension power-transmission line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620022928 CN2896458Y (en) | 2006-04-24 | 2006-04-24 | Insulator chain pressure-homogenizing structure for super-high-tension power-transmission line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2896458Y true CN2896458Y (en) | 2007-05-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620022928 Expired - Lifetime CN2896458Y (en) | 2006-04-24 | 2006-04-24 | Insulator chain pressure-homogenizing structure for super-high-tension power-transmission line |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112289524A (en) * | 2020-10-22 | 2021-01-29 | 广东电网有限责任公司电力科学研究院 | Combined insulator for improving electric field distribution of composite insulator of direct current transmission line |
-
2006
- 2006-04-24 CN CN 200620022928 patent/CN2896458Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112289524A (en) * | 2020-10-22 | 2021-01-29 | 广东电网有限责任公司电力科学研究院 | Combined insulator for improving electric field distribution of composite insulator of direct current transmission line |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: CHINA ELECTRIC POWER RESEARCH INSTITUTE Free format text: FORMER OWNER: GUO ELECTRIC POWER CONSTRUCTION RESEARCH INSTITUTE Effective date: 20090724 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20090724 Address after: Beijing City, Haidian District small business Qinghe Road No. 15 Chinese Electric Power Research Institute of the Ministry of science and technology, zip code: 100192 Patentee after: China Electric Power Research Institute Address before: Beijing City, Xuanwu District Guang'an South Binhe Road 33, zip code: 100055 Patentee before: Guodian Electric Construction Inst. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20070502 |
|
| EXPY | Termination of patent right or utility model |