CN101728804A - Central vertical grounding drop method of composite pole tower and pole tower thereof - Google Patents
Central vertical grounding drop method of composite pole tower and pole tower thereof Download PDFInfo
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- CN101728804A CN101728804A CN201010116857A CN201010116857A CN101728804A CN 101728804 A CN101728804 A CN 101728804A CN 201010116857 A CN201010116857 A CN 201010116857A CN 201010116857 A CN201010116857 A CN 201010116857A CN 101728804 A CN101728804 A CN 101728804A
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Abstract
The invention relates to a central vertical grounding down method of a composite pole tower and a pole tower thereof. A ground wire cross arm is made of metal; a grounding drop wire is led out of the center of the ground wire cross arm and is vertically dropped from the right center of the composite pole tower to ground; and if the lower part of a tower body is a steel pipe, the grounding drop wire is directly connected with the steel pipe to ground. The method adopts the insulation strength of the tower wall of the composite pole tower, strengthens the insulation strength of resisting thunder impact of a circuit, prevents the grounding drop wire from short-circuiting the tower body of the composite pole tower, and exerts the insulation function of the composite tower body. The grounding drop wire penetrates through from the inner side of the pole tower, thereby avoiding damaging the grounding drop wire by outer force of strong wind and the like by exposing outside. The grounding drop wire has simple structure and easy realization.
Description
Technical field
The present invention relates to a kind of composite material pole tower center vertical grounding drop method and shaft tower thereof, belong to technology of transmission of electricity application in the electric power system.
Background technology
Shaft tower is the visual plant of transmission line, and the characteristic of its materials used directly has influence on fail safe, economy and the reliability of circuit operation.Because steel have the strength-weight ratio height, easily process and advantage such as installation, adopt all steel material steel pole tower both at home and abroad at present mostly.But also there are defectives such as quality big (steel density is higher), easy-to-rust in all steel shaft tower, so need bigger man power and material to drop in shaft tower construction transportation and aspect safeguarding.And along with the development of composite material production technology and manufacturing process thereof, characteristics such as that composite material has is in light weight, intensity is big, corrosion-resistant, high-low temperature resistant, excellent in durability and insulating properties are strong, make composite material pole tower have cost of transportation low (particularly in meagrely-populated mountain area), antifouling, advantage such as antiseptic property is good, its application prospect is very optimistic.Adopted composite material pole tower in a large number in Canada, U.S. some areas at present.
When but Canada, the U.S. use composite material pole tower, do not consider the problem of lightning protection.Its main cause is that its circuit institute that adopts composite material pole tower is area with less lightning activities (owing to Canada, U.S. some areas are in winter throughout the year, these regional thunderstorm days are very little) through the area.In addition, it is the following electric pressure of 110kV mostly that Canada, the U.S. use the circuit of composite material pole tower, and these electric pressure systems are central point isolated neutral systems, and electric pressure is low, and lightning fault is little to the impact of system.
China's overhead line structures mainly adopt reinforcing bar to coagulate materials (110kV and above electric pressure circuit adopt all steel shaft tower usually) such as earth, timber, steel at present, because composite material pole tower has comparatively outstanding advantage, composite material pole tower (mostly in 110kV and above electric pressure) is also prepared in a lot of areas to use by China.Because these areas exist: problems such as the input in circuit corridor are big, lightening activity is intensive, filth is serious, so China is when using composite material pole tower, its main purpose is to reduce transmit electricity width of corridor, lightning protection (referring to reduce the lightning fault rate) and antifouling (referring to reduce power frequency pollution flashover failure rate by increasing the pollution flashover creepage distance) etc.
Composite material pole tower is faced with the problem of lightning protection just, so need construction of line lightning conducter (because problem Canadian, the U.S. does not consider lightning protection when adopting composite material pole tower, thereby do not set up lightning conducter), and the thunder and lightning energy when discharging thunderbolt lightning conducter (also claim " ground wire ") or cat head, to improve the counterattack lightning withstand level of circuit, reduce the lightning fault rate of circuit, need composite material pole tower to pursue tower ground connection.
Therefore, the application of transmission line composite material pole tower exists the problem of ground connection under drawing, and (all steel shaft tower is because body of the tower is a metallic conductor, ground wire is just directly received the earth by body of the tower naturally, so do not have the problem of ground connection under drawing), under drawing, its ground connection has multiple diverse ways, grounding down-leading method will directly have influence on the lightning protection effect of composite material pole tower, but also have influence on the antifouling of circuit and reduce the width of corridor etc. of transmitting electricity, so being it, the grounding down-leading method of composite material pole tower needs the key technology and the difficult point that at first solve in using.
Summary of the invention
In order to address the above problem, the invention provides a kind of composite material pole tower center vertical grounding drop method and shaft tower thereof, this invention can be given full play to the insulating effect of composite material pole tower body of the tower, makes composite material pole tower embody its value and advantage at aspects such as antifouling, lightning protection and burn-out proof composite insulators.
Technical scheme of the present invention is: a kind of composite material pole tower center vertical grounding drop method, it is characterized in that: the ground wire cross-arm of head of mast adopts metal material, down conductor is drawn at center at the ground wire cross-arm, down conductor vertically draws access the earth down from the positive center of composite material pole tower, or when the body of the tower lower part was steel pipe, down conductor directly was connected in body of the tower lower part steel pipe from the positive center of composite material pole tower and comes ground connection.
Aforesaid a kind of composite material pole tower center vertical grounding drop method is characterized in that: add one deck insulating material and strengthen the insulation of lead to down conductor on down conductor.
Aforesaid a kind of composite material pole tower center vertical grounding drop method is characterized in that: use insulating material to do the link that connects and support composite insulator.
Aforesaid a kind of composite material pole tower center vertical grounding drop method is characterized in that: at the body of the tower partial fixing flashover point of shaft tower tower head, the position of flashover point certain distance below each phase conductor.
A kind of composite material pole tower of ground connection, it is characterized in that: the ground wire cross-arm of head of mast adopts metal material, down conductor is drawn at center at the ground wire cross-arm, down conductor vertically draws access the earth down from the positive center of composite material pole tower, or when the body of the tower lower part was steel pipe, down conductor directly was connected in body of the tower lower part steel pipe from the positive center of composite material pole tower and comes ground connection.
The composite material pole tower of aforesaid ground connection is characterized in that: coat one deck insulating material outside down conductor.
The composite material pole tower of aforesaid ground connection is characterized in that: the link of connection and support composite insulator is an insulating material.
The composite material pole tower of aforesaid ground connection is characterized in that: the body of the tower of shaft tower tower head partly has the flashover point, the certain distance of the position of flashover point below each phase conductor.
The invention has the beneficial effects as follows:
(1) utilizes the dielectric strength of composite material pole tower tower wall, thereby strengthened the dielectric strength of the anti-lightning impulse of circuit;
(2) setting up flashover point can be so that during the circuit lightning stroke flashover, flashover path be by lead to the discharge of flashover point, thereby when preventing the circuit lightning stroke flashover to scaling loss, the destruction of composite material pole tower tower wall;
(3) avoid down conductor short circuit composite material pole tower body of the tower, brought into play the insulating effect of composite material body of the tower, made lead creepage distance over the ground strengthen, strengthened the ability of its pollution flashover of anti-the power frequency;
(4) if add one deck insulating material on the down conductor, and use insulating material to do the link that connects and support composite insulator, can strengthen lead insulation distance over the ground, further strengthened the anti-lightning impulse dielectric strength of circuit;
(5) avoided the inconvenience influence of down conductor to life;
(6) avoid down conductor to be exposed to the outside and be subjected to damage of external force such as strong wind, simple in structure, be easy to realize.
Description of drawings
Fig. 1 is the vertical view of the embodiment of the invention.
Fig. 2 is the front view that the embodiment of the invention does not have flashover point.
Fig. 3 is the partial enlarged drawing of Fig. 2.
Fig. 4 is the front view that the embodiment of the invention has flashover point.
Fig. 5 is the partial enlarged drawing at the flashover point place of Fig. 4.
Embodiment
Description of symbols among Fig. 1,2,4: 1-ground wire cross-arm, 2-down conductor, 3-down conductor insulated cladding, 4-composite material pole tower tower wall insulating barrier, 5-composite insulator, the connection of 6-composite insulator and support component, the body of the tower part of 7-tower head, 8-body of the tower lower part, the 9-ground wire, the last phase conductor of 10-, phase conductor among the 11-, phase conductor under the 12-, 13-flashover point, 14-flashover point and down conductor electric connecting part.
Because the body of the tower part 7 of shaft tower tower head is to adopt composite material, has certain dielectric strength, down conductor 2 vertically draws down from the inside, center of shaft tower, can utilize the dielectric strength of body of the tower composite material tower wall, thereby strengthened the dielectric strength of the anti-lightning impulse of circuit, the effect of enhancing is relevant with the material of composite material and size.Also, have certain dielectric strength, thereby avoided down conductor 2 short circuit composite material pole tower bodies of the tower, make lead creepage distance over the ground strengthen, strengthened the ability of its pollution flashover of anti-the power frequency just because the body of the tower part 7 of shaft tower tower head adopts composite material.
Set up that flashover is put its main purpose and effect is: can be so that during the circuit lightning stroke flashover, flashover path is by lead flashover point to be discharged; Thereby when preventing the circuit lightning stroke flashover to scaling loss, the destruction of composite material pole tower tower wall.The position of flashover point 13 certain distance below each phase conductor, on the dielectric strength of its position and shaft tower tower wall, the down conductor to add the factors such as dielectric strength of insulating material that link adopts of dielectric strength, connection and support composite insulator of insulating barrier relevant, the choice of location of flashover point main one is to make lead big to the distance of flashover point as far as possible, the 2nd, in the time of guaranteeing impulse flashover takes place, be that lead comes down conductor is discharged to discharge of flashover point rather than puncture shaft tower tower wall.
If parcel one deck insulating material on the down conductor 2, and use insulating material to do the connection and the support component 6 of composite insulator, can strengthen lead insulation distance over the ground, further strengthened the anti-lightning impulse dielectric strength of circuit.
Because down conductor 2 vertically draws down from the inside, composite material pole tower center, be subjected to damage of external force such as strong wind so avoided down conductor 2 to be exposed to the outside, and avoided down conductor 2 to move on the ground, the inconvenience influence of life.
This composite material pole tower grounding down-leading formula structure intuitively, simply clear, be easy to realize.
Claims (8)
1. composite material pole tower center vertical grounding drop method, it is characterized in that: the ground wire cross-arm of head of mast adopts metal material, down conductor is drawn at center at the ground wire cross-arm, down conductor vertically draws access the earth down from the positive center of composite material pole tower, or when the body of the tower lower part be steel pipe, down conductor directly is connected in body of the tower lower part steel pipe from the positive center of composite material pole tower and comes ground connection.
2. a kind of composite material pole tower according to claim 1 center vertical grounding drop method is characterized in that: add one deck insulating material and strengthen the insulation of lead to down conductor on down conductor.
3. a kind of composite material pole tower according to claim 1 center vertical grounding drop method is characterized in that: use insulating material to do the link that connects and support composite insulator.
4. a kind of composite material pole tower according to claim 1 center vertical grounding drop method is characterized in that: at the body of the tower partial fixing flashover point of shaft tower tower head, the position of flashover point certain distance below each phase conductor.
5. the composite material pole tower of a ground connection, it is characterized in that: the ground wire cross-arm of head of mast adopts metal material, down conductor is drawn at center at the ground wire cross-arm, down conductor vertically draws access the earth down from the positive center of composite material pole tower, or when the body of the tower lower part was steel pipe, down conductor directly was connected in body of the tower lower part steel pipe from the positive center of composite material pole tower and comes ground connection.
6. the composite material pole tower of ground connection according to claim 5 is characterized in that: coat one deck insulating material outside down conductor.
7. according to the composite material pole tower of claim 5 or 6 described ground connection, it is characterized in that: the link of connection and support composite insulator is an insulating material.
8. according to the composite material pole tower of claim 5 or 6 described ground connection, it is characterized in that: the body of the tower partial fixing flashover point of shaft tower tower head, the certain distance of the position of flashover point below each phase conductor.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010116857A CN101728804A (en) | 2010-01-28 | 2010-01-28 | Central vertical grounding drop method of composite pole tower and pole tower thereof |
| US13/395,112 US8859895B2 (en) | 2009-09-08 | 2010-05-05 | Method for vertically grounding and leading down from center of composite pole tower and pole tower thereof |
| PCT/CN2010/072457 WO2011029312A1 (en) | 2009-09-08 | 2010-05-05 | Method for vertically grounding and leading-down from center of composite material pole tower and pole tower thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010116857A CN101728804A (en) | 2010-01-28 | 2010-01-28 | Central vertical grounding drop method of composite pole tower and pole tower thereof |
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| Publication Number | Publication Date |
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| CN101728804A true CN101728804A (en) | 2010-06-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010116857A Pending CN101728804A (en) | 2009-09-08 | 2010-01-28 | Central vertical grounding drop method of composite pole tower and pole tower thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101964507A (en) * | 2009-09-08 | 2011-02-02 | 国网电力科学研究院 | Central vertical grounding leading-down method for composite pole tower and pole tower thereof |
-
2010
- 2010-01-28 CN CN201010116857A patent/CN101728804A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101964507A (en) * | 2009-09-08 | 2011-02-02 | 国网电力科学研究院 | Central vertical grounding leading-down method for composite pole tower and pole tower thereof |
| CN101964507B (en) * | 2009-09-08 | 2012-11-07 | 国网电力科学研究院 | Central vertical grounding leading-down method for composite pole tower and pole tower thereof |
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Open date: 20100609 |