CN204376347U - Submarine cable, overhead line hybrid line three ground wire lightning protection structure - Google Patents
Submarine cable, overhead line hybrid line three ground wire lightning protection structure Download PDFInfo
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- CN204376347U CN204376347U CN201520100211.2U CN201520100211U CN204376347U CN 204376347 U CN204376347 U CN 204376347U CN 201520100211 U CN201520100211 U CN 201520100211U CN 204376347 U CN204376347 U CN 204376347U
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- ground wire
- hanging point
- wire hanging
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Abstract
The utility model discloses a kind of submarine cable, overhead line hybrid line three ground wire lightning protection structure, comprise the first ground wire hanging point, the second ground wire hanging point, first ground wire hanging point, the second ground wire hanging point are arranged on the both sides of electric power line pole tower symmetry, the crown center of electric power line pole tower is provided with the 3rd ground wire hanging point, 3rd ground wire hanging point, at the middle upper part of the first ground wire hanging point, the second ground wire hanging point, the first ground wire hanging point, the second ground wire hanging point and the 3rd ground wire hanging point is respectively arranged with electric power line pole tower grounding wire device; Electric power line pole tower grounding wire device comprises trunnion hanging panel, trunnion hanging panel is connected with the upper end thereof of two the U-shaped links interlocked, the lower end of U-shaped link is connected with the yoke plate of isosceles triangle, the base angle place of yoke plate is mounted with insulator respectively, and insulator is connected with the suspension clamp of fixing ground wire by link.Its simplicity of design, can improve the ability of cable tolerance lightning impulse voltage, improve safety, reliability that cable runs.
Description
Technical field
The utility model relates to lightning protection structure, specifically refers to a kind of submarine cable, overhead line hybrid line three ground wire lightning protection structure.
Background technology
Thunderbolt is the one of the main reasons causing transmission line tripping operation power outage, and according to statistics, in power system accident, lightening hazard generally accounts for more than 50%.Therefore, the lightning Protection Design of transmission line has great significance for the safe and stable operation of electric power system.
The size of submarine cable thunder intrusion directly affects cable lightning impulse withstand voltage design load, has critical impact for the overvoltage protection of submarine cable and insulation coordination.Exchange the insulation thickness of 500kV submarine cable mainly by the impact of lightning impulse withstand voltage.Research is thought, near region (mostly being near region, submarine cable terminal station) thunderbolt causes the higher superpotential main cause of cable.At present, the measure of China 220kV and above submarine cable engineering many employings overhead wire erection double earth wire, to reduce overhead wire thunderbolt rate, to reduce maximum thunderbolt electric current, but its effect or not ideal enough.
Summary of the invention
The purpose of this utility model is exactly for the deficiencies in the prior art; a kind of submarine cable of good stability, overhead line hybrid line three ground wire lightning protection structure are provided; overhead wire risk of shielding failure and maximum shielding electric current can be reduced by this structure; thus improve can cable tolerance lightning impulse voltage ability, improve cable run safety, reliability.
For achieving the above object, submarine cable designed by the utility model, overhead line hybrid line three ground wire lightning protection structure, be arranged on electric power line pole tower, comprise the first ground wire hanging point, second ground wire hanging point, first ground wire hanging point, second ground wire hanging point is arranged on the both sides of electric power line pole tower symmetry, the crown center of electric power line pole tower is provided with the 3rd ground wire hanging point, 3rd ground wire hanging point is arranged on the first ground wire hanging point, the middle upper part of the second ground wire hanging point, first ground wire hanging point, second ground wire hanging point and the electric power line pole tower grounding wire device the 3rd ground wire hanging point is respectively arranged with for being connected ground wire, first ground wire hanging point, second ground wire hanging point and the 3rd ground wire hanging point are connected respectively a ground wire.
Electric power line pole tower grounding wire device comprises trunnion hanging panel, trunnion hanging panel is connected with the upper end thereof of two the U-shaped links interlocked, the lower end of U-shaped link is connected with the yoke plate of isosceles triangle, the drift angle place of U-shaped link and yoke plate is hinged and connected, two base angles place of yoke plate is mounted with insulator respectively, insulator is all connected with the suspension clamp of fixing ground wire by link, two suspension clamps clamp ground wire simultaneously and use bolted.
In technique scheme, the horizontal range of the first ground wire hanging point and the second ground wire hanging point and the 3rd ground wire hanging point is 12.6m, and the vertical range of the first ground wire hanging point and the second ground wire hanging point and the 3rd ground wire hanging point is 3.7m.
Advantage of the present utility model is mainly reflected in following several respects:
One, submarine cable, overhead line hybrid line three ground wire lightning protection structural design are simple, can reduce overhead wire risk of shielding failure and maximum shielding electric current, thus improve the ability of cable tolerance lightning impulse voltage, and then improve safety, the reliability of cable operation.
Its two, electric power line pole tower grounding wire device is provided with two suspension clamps, connect convenient ground wire, firmly, good stability.
Its three, submarine cable, overhead line hybrid line three ground wire lightning protection structure can realize hanging earthing conductor on various shaft tower.
After tested, adopt technical solutions of the utility model near region thunderbolt rate to decline 10%, maximum thunderbolt electric current reduces 17%, significantly improves the safety of cable insulation nargin and operation, reliability.
Accompanying drawing explanation
Fig. 1 is the structural representation of submarine cable, overhead line hybrid line three ground wire lightning protection structure;
Fig. 2 is the structural representation of electric power line pole tower grounding wire device.
In figure: electric power line pole tower 1; First ground wire hanging point 2; Second ground wire hanging point 3; 3rd ground wire hanging point 4; Electric power line pole tower grounding wire device 5; Trunnion hanging panel 6; U-shaped link 7; Yoke plate 8; Insulator 9; Suspension clamp 10; Ground wire 11.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail, but this embodiment should not be construed restriction of the present utility model.
Submarine cable shown in Fig. 1, overhead line hybrid line three ground wire lightning protection structure, be arranged on electric power line pole tower 1, comprise the first ground wire hanging point 2, second ground wire hanging point 3, first ground wire hanging point 2, second ground wire hanging point 3 is arranged on the both sides of electric power line pole tower 1 symmetry, the crown center of electric power line pole tower 1 is provided with the 3rd ground wire hanging point 4, 3rd ground wire hanging point 4 is arranged on the first ground wire hanging point 2, the middle upper part of the second ground wire hanging point 3, first ground wire hanging point 2, second ground wire hanging point 3 and the electric power line pole tower grounding wire device 5 the 3rd ground wire hanging point 4 is respectively arranged with for being connected ground wire 11, first ground wire hanging point 2, second ground wire hanging point 3 and the 3rd ground wire hanging point 4 are connected respectively a ground wire 11.
Electric power line pole tower grounding wire device 5 shown in Fig. 2, comprise trunnion hanging panel 6, trunnion hanging panel 6 is connected with the upper end thereof of two the U-shaped links 7 interlocked, the lower end of U-shaped link 7 is connected with the yoke plate 8 of isosceles triangle, U-shaped link 7 is hinged and connected with the drift angle place of yoke plate 8, two base angles place of yoke plate 8 is mounted with insulator 9 respectively, and suspension clamp 10, two suspension clamps 10 that insulator 9 is all connected with fixing ground wire 11 by link clamp ground wire 11 simultaneously and use bolted.
The horizontal range of the first ground wire hanging point 2 and the second ground wire hanging point 3 and the 3rd ground wire hanging point 4 is 12.6m, and the vertical range of the first ground wire hanging point 2 and the second ground wire hanging point 3 and the 3rd ground wire hanging point 4 is 3.7m.
During utility model works, first determine the position of the first ground wire hanging point 2, second ground wire hanging point 3 and the 3rd ground wire hanging point 4, then three electric power line pole tower grounding wire devices 5 are separately fixed on the first ground wire hanging point 2, second ground wire hanging point 3 and the 3rd ground wire hanging point 4, then suspension clamp 10 are clamped the ground wire 11 corresponding with it and fixes with bolt.
After southern major network and Hainan Power Grid networking project 500kV submarine cable engineering adopt technique scheme to test, near region thunderbolt rate declines 10%, maximum thunderbolt electric current reduces 17%, significantly improves the safety of cable insulation nargin and operation, reliability.
The content be not described in detail in this specification, belongs to the known prior art of those skilled in the art.
Claims (2)
1. a submarine cable, overhead line hybrid line three ground wire lightning protection structure, be arranged on electric power line pole tower (1), comprise the first ground wire hanging point (2), second ground wire hanging point (3), described first ground wire hanging point (2), second ground wire hanging point (3) is arranged on the symmetrical both sides of electric power line pole tower (1), it is characterized in that: the crown center of electric power line pole tower (1) is provided with the 3rd ground wire hanging point (4), described 3rd ground wire hanging point (4) is arranged on described first ground wire hanging point (2), the middle upper part of the second ground wire hanging point (3), described first ground wire hanging point (2), second ground wire hanging point (3) and the electric power line pole tower grounding wire device (5) the 3rd ground wire hanging point (4) is respectively arranged with for being connected ground wire (11), described first ground wire hanging point (2), second ground wire hanging point (3) and the 3rd ground wire hanging point (4) are connected respectively a ground wire (11),
Described electric power line pole tower grounding wire device (5) comprises trunnion hanging panel (6), described trunnion hanging panel (6) is connected with the upper end thereof of two the U-shaped links (7) interlocked, the lower end of described U-shaped link (7) is connected with the yoke plate (8) of isosceles triangle, described U-shaped link (7) is hinged and connected with the drift angle place of described yoke plate (8), two base angles place of described yoke plate (8) is mounted with insulator (9) respectively, described insulator (9) is all connected with the suspension clamp (10) of fixing ground wire (11) by link, two described suspension clamps (10) clamp described ground wire (11) simultaneously and use bolted.
2. submarine cable according to claim 1, overhead line hybrid line three ground wire lightning protection structure; it is characterized in that: described first ground wire hanging point (2) and the second ground wire hanging point (3) are 12.6m with the horizontal range of described 3rd ground wire hanging point (4), described first ground wire hanging point (2) and the second ground wire hanging point (3) are 3.7m with the vertical range of described 3rd ground wire hanging point (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520100211.2U CN204376347U (en) | 2015-02-12 | 2015-02-12 | Submarine cable, overhead line hybrid line three ground wire lightning protection structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520100211.2U CN204376347U (en) | 2015-02-12 | 2015-02-12 | Submarine cable, overhead line hybrid line three ground wire lightning protection structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204376347U true CN204376347U (en) | 2015-06-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520100211.2U Active CN204376347U (en) | 2015-02-12 | 2015-02-12 | Submarine cable, overhead line hybrid line three ground wire lightning protection structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204376347U (en) |
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2015
- 2015-02-12 CN CN201520100211.2U patent/CN204376347U/en active Active
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