CN201507141U - Composite insulating pole tower for power transmission line - Google Patents
Composite insulating pole tower for power transmission line Download PDFInfo
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- CN201507141U CN201507141U CN2009202283955U CN200920228395U CN201507141U CN 201507141 U CN201507141 U CN 201507141U CN 2009202283955 U CN2009202283955 U CN 2009202283955U CN 200920228395 U CN200920228395 U CN 200920228395U CN 201507141 U CN201507141 U CN 201507141U
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Abstract
The utility model relates to a composite insulating pole tower for a power transmission line. A pole tower body is made of composite insulating tubular products; a lead cross arm adopts a composite insulator; a ground wire cross arm adopts a metal conductor; a grounding down lead is made of metal wire stocks or tubular products or bars and is led down from the middle of the tubular product in a suspended manner to be grounded; metal electrodes are mounted on the ground wire cross arm and the lead cross arm; a hole is drilled in a proper position of the pole tower to mount the grounding down lead and lead the electrodes out; and an air clearance distance between a ground wire side electrode and a lead side electrode as well as an air clearance distance between the leading-out electrode of the grounding down lead and the lead is determined according to the lightning protection requirements. The grounding mode of the composite pole tower effectively utilizes the insulating performance of a composite pole to improve the pollution flashover resistance, the icing flashover, the windproof deviation and the lightning withstand level of the line can be improved, and the dimension of a tower head can be compressed. The utility model has the advantages of reducing the manufacturing cost and the installation and maintenance cost of the pole tower body and simultaneously reducing the width of a corridor of the line.
Description
Technical field
The utility model belongs to the transmission line of electricity field, is specifically related to a kind of composite insulating pole tower of power transmission line.
Background technology
Shaft tower is the visual plant of transmission line of electricity, the transmission line of electricity of present 110kV of China and above electric pressure adopts iron tower more, its shortcoming be perishable, quality heavy, stolen easily, and windage yaw, pollution flashover, ice sudden strain of a muscle, thunderbolt etc. take place under extreme natural environment easily, cause circuit tripping operation even generation stoppage in transit accident to occur.
Characteristics such as that composite material has is in light weight, intensity big, good insulating, anti-weathering aging, corrosion resistance are strong, composite material is applied to the insulating properties that electric power line pole tower can increase substantially circuit, significantly improving the circuit resistant dodges, ices and dodge, prevent windage yaw, lightning withstand level, also compressible simultaneously tower head size reduces the circuit width of corridor.Simultaneously, also have in light weight, corrosion-resistant, stolen the little characteristics of possibility.
The earthing mode of the lightning conducter of the present iron tower of China is an electric conductivity ground connection of utilizing shaft tower metal tower material.After adopting composite material, because the insulating properties of composite material makes lightning conducter not have effectively directly grounding path as overhead line structures.Because the lightning conducter of the transmission line of electricity that the 110kV electric pressure is above is ground connection step by step, could effectively reduce the tripping rate with lightning strike of circuit, therefore, need be applicable to the earthing mode of composite material bar, effectively utilize on the basis of composite material bar insulating properties in assurance, make the lightning conducter effective grounding of circuit.
Summary of the invention
The purpose of this utility model is to propose a kind of composite insulating pole tower of power transmission line; after this utility model makes transmission line of electricity adopt composite insulating pole tower; can make full use of the insulating properties of composite material; protected composite material bar wall to be difficult for genetic horizon to puncture; having improved the circuit resistant dodges, ices and dodge, prevent windage yaw, lightning withstand level; further compression tower head size reduces the circuit width of corridor, and make route lever have in light weight, corrosion-resistant, stolen the little characteristics of possibility.
The technical solution of the utility model is: a kind of composite insulating pole tower of power transmission line, the shaft tower main body adopts insulating composite material tubing, the lead cross-arm adopts composite insulator, it is characterized in that: the ground wire cross-arm adopts metallic conductor, down conductor adopts metal wire rod or tubing or bar, down conductor one end is fixed on the ground wire cross-arm, from the middle unsettled back other end ground connection down of drawing of composite insulating pole tower, on ground wire cross-arm and the lead cross-arm metal electrode is housed respectively, the down conductor extraction electrode is installed in the suitable position punching that is chosen in composite insulating pole tower simultaneously additional.
The beneficial effects of the utility model are:
1. composite material pole tower is owing to the insulating properties of body of the tower along face and tower wall, compare with conventional 110kV iron tower, tower head phase ground, alternate the air gap, insulation creep distance increase greatly, simultaneously since the solid insulating material dielectric strength much larger than the air gap, dielectric strength between the phase ground also significantly improves, and can improve the circuit resistant and dodge, ices and dodge, prevent windage yaw, lightning withstand level.
2. employing composite material pole tower, distance between all right further compression lead and the body of the tower is not less than on the basis of iron tower at the sudden strain of a muscle of circuit resistant, ice sudden strain of a muscle, anti-windage yaw, lightning withstand level, compression tower head size, save the circuit width of corridor to reach, reduce the effect of shaft tower body cost.
3. when thunderbolt produces bigger lightning surge, the air gap between ground wire lateral electrode and the lead lateral electrode, perhaps the air gap between down conductor extraction electrode and the lead at first punctures, lightning surge is inhibited mutually, avoid the composite insulating pole wall to puncture, also avoid simultaneously lead directly to puncture between alternate.
4. because composite material also has characteristics such as weathering aging in light weight, anti-, corrosion resistance be strong, to be that overhead line structures have in light weight, corrosion-resistant, stolen the little characteristics of possibility.
Description of drawings
Fig. 1 is the utility model composite material pole tower earthing mode schematic diagram.
Fig. 2 is the utility model composite material pole tower important technological parameters schematic diagram.
The specific embodiment
Below in conjunction with drawings and Examples the utility model is further described.
The explanation of mark among Fig. 1: 1-ground wire cross-arm, the 2-ground wire, 3-ground wire lateral electrode, 4-lead lateral electrode, 5-lead cross-arm, 6-lead (wire clamp), 7-lead cross-arm and shaft tower coupling part, 8-composite material pole tower, 9-shaft tower and shaft tower coupling part, the 10-down conductor, 11-down conductor extraction electrode.
The explanation of mark among Fig. 2: the air gap distance between D1-ground wire lateral electrode and lead lateral electrode, air gap distance between D2-down conductor extraction electrode and lead (wire clamp), air gap distance between D3-ground wire and lead, air gap distance between r-ground wire and the composite material pole tower, d-composite material bar wall thickness, B-lead (wire clamp) and composite material pole tower air gap distance, the alternate vertical air clearance distance of C1-, the alternate horizontal air clearance distance of C2-.
The shaft tower main body adopts insulating composite material tubing, lead cross-arm 5 adopts composite insulator, ground wire cross-arm 1 adopts metallic conductor, down conductor 10 adopts metal wire rod or pipe (rod) material, down conductor 10 1 ends are fixed on the ground wire cross-arm 1, from the middle unsettled back other end ground connection down of drawing of composite insulating pole, on ground wire cross-arm 1 and the lead cross-arm 5 metal electrode is housed respectively, down conductor extraction electrode 11 is installed in the suitable position punching that is chosen in composite insulating pole tower simultaneously additional, can be according to the lightning protection requirement, determine the air gap distance between ground wire lateral electrode 3 and the lead lateral electrode 4, and the air gap distance between down conductor extraction electrode 11 and the lead (wire clamp) 6.
The tube wall of composite material pipe, except installing the position perforate of down conductor extraction electrode 11 additional, other parts are answered flawless, seamless, to insulate inside and outside the maintenance tube wall; Lead cross-arm 5 is connected with tubing, should seal between tubing and the tubing, with the insulating properties inside and outside the maintenance tube wall.
Mainly control for the lightning withstand level that adopts common iron tower transmission line of electricity by the dielectric level of the air gap between the phase ground.After adopting composite material pole tower, down conductor is along tubing bosom ground connection, and the insulation between phase and the ground has increased the insulating properties of the wall thickness of tubing, because the insulating properties of solid insulating material are much larger than the air gap.Therefore after circuit adopts composite material pole tower, the insulating properties of the two kinds of combined insulations in the air gap between the wall thickness of composite material bar and the phase ground is bigger than the insulating properties of the air gap, common iron tower phase ground.Therefore, the lightning withstand level of composite material pole tower is also big than common iron tower.
Because flashover mutually when being struck by lightning, will inevitably take place transmission line of electricity, for being the iron tower of the air gap insulation between the phase ground, after the insulation of air punctures, its insulating properties will be recovered voluntarily; But the course insulation for the composite material tube wall in case puncture irrecoverable, will make the insulating properties of shaft tower significantly reduce, and have influence on the mechanical performance of shaft tower.
Therefore, in the middle of composite material pole tower, draw following time, between ground wire cross-arm 1 and lead cross-arm 5, metal electrode is installed, and is made the suitable air gap distance of maintenance between two electrodes at down conductor; Down conductor extraction electrode 11 is installed in the suitable position punching that can also be chosen in shaft tower additional, makes down conductor extraction electrode 11 and adjacent wires (wire clamp) 6 keep suitable air gap distance.When thunderbolt produces bigger lightning surge, the air gap between ground wire lateral electrode 3 and the lead lateral electrode 4, perhaps the air gap between down conductor extraction electrode 11 and the lead (wire clamp) 6 at first punctures, lightning surge is inhibited mutually, avoid the composite insulating pole wall to puncture, also avoid simultaneously lead directly to puncture between alternate.
Embodiment 1:
110kV transmission line of electricity composite material pole tower can adopt above earthing mode.As shown in Figure 2, the shaft tower important technological parameters can be got following value: C1=3.5m, C2=3.0m, and r ≈ 0.2m, B ≈ 1.5m, d=10mm, D1=1.5m, D3=3.0m, cancellation D2 does not promptly install the down lead electrode additional in the shaft punching.Adopt this scheme, at first, each clearance distance of shaft tower satisfies the requirement of 110kV line design, can satisfy 110kV circuit service requirement on electric property; Secondly, also have the following advantages:
(1) adopts this earthing mode, effectively utilized the insulating properties of shaft, and lightning surge flashover gap is provided;
110kV insulation distance is mutually controlled by lightning surge mainly, and with counterattack Lei Weizhu.The insulation of the phase of composite material bar ground mainly contains: distance is the air gap insulation of D1 (1.5m), and distance (1.8m) the air gap and thickness are the insulating composite material combined insulation of d (10mm) for (r+B).
Because (r+B+d) dielectric strength of combined insulation is greater than (D1) the air gap, therefore when the bigger lightning surge of circuit generation, (D1) the air gap punctures in advance, can suppress lightning surge, combined insulation is not punctured, avoided composite material bar parietal layer to the puncture that irrecoverable property takes place.
(2) dielectric strength between the composite material bar phase ground is greater than 110kV iron tower, has increased the anti-thunder of shaft tower, anti-windage yaw level;
110kV iron tower phase insulate between the ground, is mainly lead to the long insulator string of about 1.0m between the cross-arm.And above-mentioned 110kV composite material bar, the dielectric strength between the phase ground is mainly the air gap control of D1 (1.5m).The phase ground dielectric strength of composite material bar is greater than common iron tower.
(3) increased phase ground, phase insulation creep distance, the resistant level of composite material bar is better than 110kV iron tower;
Shaft tower creepage distance of insulation has mutually increased the length that adds the SI semi-insulation body of the tower for the creepage distance of insulation of common 110kV; Horizontal phase insulation creep age distance is according to the phase ground creepage distance of insulation that is twice; The phase ground creep age distance that vertical phase insulation creep age distance is a twice adds the length of SI semi-insulation body of the tower.Making shaft tower get resistant sudden strain of a muscle level significantly promotes.
(4) can further compress the tower head size, reduce the circuit width of corridor
Because composite material pole tower in this programme is compared with conventional 110kV iron tower, tower head phase ground, alternate the air gap, insulation creep distance increase greatly, significantly improve electric properties such as the circuit resistant is dodged, ice sudden strain of a muscle, anti-windage yaw, lightning withstand level;
Therefore, can further compress the tower head size, reduce phase ground, alternate insulation distance and the creep distance that insulate, the electric property of composite material bar is not less than on the basis of conventional iron tower, save the circuit width of corridor, reduce shaft tower body cost;
(5) the composite material bar also has other advantage of composite material;
Because the density of composite material is about 1/4 ~ 1/3 of iron tower, makes the weight of composite material pole tower be less than iron tower, has reduced the transportation and the mounting cost of shaft tower; Composite material has good anti-corrosion, and the possibility of being stolen is little, has reduced the maintenance cost of shaft tower.
Embodiment 2:
220kV transmission line of electricity composite material pole tower can adopt above earthing mode.As shown in Figure 2, the shaft tower important technological parameters can be got following value: C1=5.5m, C2=5.0m, r ≈ 0.3m, B ≈ 2.4m, d=15mm, D1=2.5m, D3=5.0m, D2=2.7m.At first, each clearance distance of shaft tower satisfies the requirement of 110kV line design, can satisfy 220kV circuit service requirement on electric property; Secondly, also have the following advantages:
(1) adopt this earthing mode, effectively utilized the insulating properties of shaft, and lightning surge flashover gap is provided:
220kV insulation distance is mutually controlled by lightning surge mainly.The insulation of the phase of composite material bar ground mainly contains: distance is the air gap insulation of D1 (2.5m), and distance be the air gap insulation of D2 (2.7m), and distance is that (r+B) (2.7m) the air gap and thickness are the insulating composite material combined insulation of d (15mm).
Because (r+B+d) dielectric strength of combined insulation is greater than (D1), (D2) the air gap, therefore when the bigger lightning surge of circuit generation, (D1) or (D2) the air gap punctures in advance, can suppress lightning surge, combined insulation is not punctured, avoided composite material bar parietal layer to the puncture that irrecoverable property takes place.
(2) dielectric strength between the composite material bar phase ground is greater than 220kV iron tower, has increased the lightning withstand level of shaft tower;
220kV iron tower phase insulate between the ground, is mainly lead to the long insulator string of about 1.0m between the cross-arm.And above-mentioned 220kV composite material bar, the dielectric strength between the phase ground is mainly the air gap control of D1 (2.5m), D2 (2.7).The phase ground dielectric strength of composite material bar is greater than common iron tower.
(3) increased phase ground, phase insulation creep distance, the resistant level of composite material bar is better than 220kV iron tower;
Shaft tower creepage distance of insulation has mutually increased the length that adds the SI semi-insulation body of the tower for the creepage distance of insulation of common 220kV; Horizontal phase insulation creep age distance is according to the phase ground creepage distance of insulation that is twice; The phase ground creep age distance that vertical phase insulation creep age distance is a twice adds the length of SI semi-insulation body of the tower.Making shaft tower get resistant sudden strain of a muscle level significantly promotes.
(4) can further compress the tower head size, reduce the circuit width of corridor
Because composite material pole tower in this programme is compared with conventional 220kV iron tower, tower head phase ground, alternate the air gap, insulation creep distance increase greatly, significantly improve electric properties such as the circuit resistant is dodged, ice sudden strain of a muscle, anti-windage yaw, lightning withstand level;
Therefore, can further compress the tower head size, reduce phase ground, alternate insulation distance and the creep distance that insulate, the electric property of composite material bar is not less than on the basis of conventional iron tower, save the circuit width of corridor, reduce shaft tower body cost.
(5) the composite material bar also has other advantage of composite material;
Because the density of composite material is about 1/4 ~ 1/3 of iron tower, makes the weight of composite material pole tower be less than iron tower, has reduced the transportation and the mounting cost of shaft tower; Composite material has good anti-corrosion, and the possibility of being stolen is little, has reduced the maintenance cost of shaft tower.
Claims (1)
1. composite insulating pole tower of power transmission line, the shaft tower main body adopts insulating composite material tubing, the lead cross-arm adopts composite insulator, it is characterized in that: the ground wire cross-arm adopts metallic conductor, down conductor adopts metal wire rod or tubing or bar, down conductor one end is fixed on the ground wire cross-arm, from the middle unsettled back other end ground connection down of drawing of composite insulating pole tower, on ground wire cross-arm and the lead cross-arm metal electrode is housed respectively, the down conductor extraction electrode is installed in the suitable position punching that is chosen in composite insulating pole tower simultaneously additional.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202283955U CN201507141U (en) | 2009-09-27 | 2009-09-27 | Composite insulating pole tower for power transmission line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202283955U CN201507141U (en) | 2009-09-27 | 2009-09-27 | Composite insulating pole tower for power transmission line |
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| CN201507141U true CN201507141U (en) | 2010-06-16 |
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| CN2009202283955U Expired - Lifetime CN201507141U (en) | 2009-09-27 | 2009-09-27 | Composite insulating pole tower for power transmission line |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102005712A (en) * | 2010-10-20 | 2011-04-06 | 甘肃省电力设计院 | Strain corner tower with horizontal winding and jumping wire jumper for two-loop compact power transmission line |
| CN101692572B (en) * | 2009-09-27 | 2012-11-07 | 国网电力科学研究院 | Grounding method for composite insulating pole tower of power transmission line and pole tower thereof |
| CN104563580A (en) * | 2013-10-15 | 2015-04-29 | 北京玻钢院复合材料有限公司 | Insulation pole tower for power transmission and distribution line and manufacturing method thereof |
| CN104733880A (en) * | 2013-12-20 | 2015-06-24 | 国家电网公司 | Electric transmission line and ground wire thereof |
-
2009
- 2009-09-27 CN CN2009202283955U patent/CN201507141U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101692572B (en) * | 2009-09-27 | 2012-11-07 | 国网电力科学研究院 | Grounding method for composite insulating pole tower of power transmission line and pole tower thereof |
| CN102005712A (en) * | 2010-10-20 | 2011-04-06 | 甘肃省电力设计院 | Strain corner tower with horizontal winding and jumping wire jumper for two-loop compact power transmission line |
| CN102005712B (en) * | 2010-10-20 | 2013-03-13 | 甘肃省电力设计院 | Strain corner tower with horizontal winding and jumping wire jumper for two-loop compact power transmission line |
| CN104563580A (en) * | 2013-10-15 | 2015-04-29 | 北京玻钢院复合材料有限公司 | Insulation pole tower for power transmission and distribution line and manufacturing method thereof |
| CN104733880A (en) * | 2013-12-20 | 2015-06-24 | 国家电网公司 | Electric transmission line and ground wire thereof |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20100616 Effective date of abandoning: 20090927 |
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| RGAV | Abandon patent right to avoid regrant |