CN104200893B - High-altitude power transmission line - Google Patents
High-altitude power transmission line Download PDFInfo
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- CN104200893B CN104200893B CN201410488097.5A CN201410488097A CN104200893B CN 104200893 B CN104200893 B CN 104200893B CN 201410488097 A CN201410488097 A CN 201410488097A CN 104200893 B CN104200893 B CN 104200893B
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- 230000004888 barrier function Effects 0.000 claims description 3
- 239000004020 conductor Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000008014 freezing Effects 0.000 description 3
- 238000007710 freezing Methods 0.000 description 3
- 241000521257 Hydrops Species 0.000 description 2
- 206010030113 Oedema Diseases 0.000 description 2
- 206010044565 Tremor Diseases 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
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- 238000010438 heat treatment Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
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- 239000010959 steel Substances 0.000 description 1
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Abstract
The present invention provides a kind of high-altitude power transmission line, including at least non-conductive core；This non-conductive core outer wrap at least one of which conductive layer；Described conductive layer is formed by a continuous print tinsel coiling, forms an extension spring, and each circle of described extension spring relies closely；The direction that described tinsel extends along tinsel itself, has the cross section in periodically continued change；As preferably, described continually varying cross section has the feature that the sideline of twice up and down of described any one longitudinal section wiry is the sine curve about tinsel axisymmetrical.This high-altitude power transmission line can be largely avoided under severe cold weather, the accumulated snow on power transmission line surface or accumulated ice, makes the deadweight of power transmission line remain reduced levels, thus significantly reduces its probability ruptured under extreme weather.
Description
Technical field
The present invention relates to electric power facility field, especially, relate to a kind of high-altitude power transmission line.
Background technology
High-altitude power transmission line is the basic electric power facility realizing remote power conveying；During transmission of electricity, need to stand the weather test of various different regions, as, the mountain area of some colds, the high-altitude residing for power transmission line has extremely cold temperature, and often meet with rainwater weather, now, power transmission line surface is very easy to accumulated snow and icing, causes power transmission line weight to be increased sharply, blowing through wind one, power transmission line very likely ruptures and drops again.Current high-altitude power transmission line is formed by steel wire core strand system, is substantially all and is faced with this problem, causes the biggest trouble to power construction department.
Summary of the invention
For the problems referred to above, it is an object of the invention to provide a kind of high-altitude power transmission line, this high-altitude power transmission line can be largely avoided under severe cold weather, the accumulated snow on power transmission line surface or accumulated ice, the deadweight making power transmission line remains reduced levels, thus significantly reduces its probability ruptured under extreme weather.
The technical solution adopted for the present invention to solve the technical problems is: this high-altitude power transmission line includes at least non-conductive core；This non-conductive core outer wrap at least one of which conductive layer；Described conductive layer is formed by a continuous print tinsel coiling, forms an extension spring, and each circle of described extension spring relies closely；The direction that described tinsel extends along tinsel itself, has the cross section in periodically continued change.
As preferably, described continually varying cross section has the feature that the sideline of twice up and down of described any one longitudinal section wiry is the sine curve about tinsel axisymmetrical.
As preferably, described conductive layer has 1～3 layer；Further, it is provided with insulating barrier between the described conductive layer of each layer, thus suppresses the Kelvin effect of alternating current, make each conductive layer all can participate in efficient current-carrying.
As preferably, described non-conductive core has elasticity, and when stretching and keeping suitable internal stress, at conductive layer described in its surface coiling；So that electric lines of force is at nominal conditions, by the resilience pulling force compression close to each other of non-conductive core between each circle of conductive layer.
The beneficial effects of the present invention is: when this high-altitude power transmission line is operated under normal climate, rely closely between each circle tinsel of described conductive layer, conductive layer is made to form a tubular electric conductor, electric current is from the tube wall of this tubular electric conductor along the direction flowing that electric wire extends, and conductive layer has minimum resistance；And when meeting with weather of extremely trembling with fear, the a large amount of accumulated snow of wire surface, during accumulated ice, owing to conductive layer is made up of cross sectional dimensions continually varying tinsel, therefore, it is filled with hole by plated space on electric wire, after hydrops penetrates into these holes, by freezing and expansion, thus each circle tinsel of conductive layer is strutted, each circle tinsel is made to be no longer abut against together, this makes the current path on conductive layer there occurs huge change, i.e. from the original state along the flowing of electric wire bearing of trend, become the state moved ahead around wire rotating, the path making electric current extends hundreds of times, so that the resistance of whole power transmission line has increased hundreds of times suddenly, the pressure drop on power transmission line is made suddenly to improve, conductive layer is brought rapidly up heating, thus by the accumulated snow on power transmission line, accumulated ice melts, make power transmission line from accumulated snow, accumulated ice breaks.
Accompanying drawing explanation
Fig. 1 is the side schematic view of this one embodiment of high-altitude power transmission line.
Fig. 2 is that the end of Fig. 1 embodiment is to schematic diagram.
Fig. 3 is the schematic diagram wiry constituting conductive layer in this high-altitude power transmission line.
Fig. 4 is the electric current of conductive layer surface path comparison diagram under two states in this high-altitude power transmission line.
Detailed description of the invention
The present invention is further described with embodiment below in conjunction with the accompanying drawings:
In the embodiment shown in Fig. 1, Fig. 2, this high-altitude power transmission line includes a non-conductive core 1；This non-conductive core 1 outer wrap has two conductive layers 21,22；Described conductive layer 21,22 is formed by a continuous print tinsel coiling, forms an extension spring, and each circle of described extension spring relies closely.
As it is shown on figure 3, the direction that described tinsel 200 extends along tinsel itself, there is the cross section in periodically continued change；Described continually varying cross section has the feature that the sideline of twice up and down of any one longitudinal section of described tinsel 200 is the sine curve about tinsel axisymmetrical, in i.e. Fig. 3, about straight line L, the sideline of twice up and down of tinsel 200 longitudinal section is symmetrical sine curve.
Above-mentioned high-altitude power transmission line, described non-conductive core 1 has elasticity, and when stretching and keeping suitable internal stress, at conductive layer 21,22 described in its surface coiling；So that electric lines of force is at nominal conditions, by the resilience pulling force compression close to each other of non-conductive core 1 between each circle of conductive layer 21,22.For described suitable internal stress, it should determine as follows, it is assumed that when described high-altitude power transmission line normally sets up, the gravity of power transmission line self pulling force along power transmission line bearing of trend caused is T；The most described suitable internal stress is 1.5T～2T.
As, when power transmission line normally hangs, mean obliquity φ=5 ° formed with horizontal plane, power transmission line deadweight is 2G, then according to Mechanics Vector analysis, the pulling force in power transmission line is about T=G/tan5 °.
Described suitable internal stress has the upper limit, and reason that should not be excessive is then: if internal stress is excessive, then penetrate into water body in power transmission line due to pressure experienced excessive and be difficult to freezing and expansion；Described internal stress specifically takes how many, then the degree of tightness situation of power transmission line that sets up according to plan and determine, i.e. according to described declination angle depending on.
Furthermore it is also possible to arrange insulating barrier between the described conductive layer of each layer 21,22, make can not radially directly turn between each layer conductive layer 21,22；So that each conductive layer all can independently participate in efficient current-carrying, suppression alternating current only transmits due to Kelvin effect in outer layer conductive layer.
When above-mentioned high-altitude power transmission line is operated under normal climate, relying closely between each circle tinsel of described conductive layer 21,22, make conductive layer form a tubular electric conductor, electric current flows along the direction that electric wire extends from the tube wall of this tubular electric conductor, i.e. as in Fig. 4 left part illustrated, electric current is a circle 212 after previous circle 211 flow to, and path is as shown in the arrow of two turn-to-turns, the shortest, and electric current is the biggest by area, close to a circle axial projective area wiry, therefore, resistance is the least；Assume each circle diameter wiry, that is the nominal diameter of described tubular electric conductor is D, and cross-sectional diameter wiry is d, then circle axial projective area wiry S=π Dd, two circle real contact areas wiry, i.e. electric current is by the conservative π Dd/3 that is assumed to be of area, then sets the resistivity of tinsel 200 as ρ, then electric current resistance M1=ρ d/(π Dd/2 suffered by a circle 212 after previous circle 211 flow to)=3 ρ/π D；M1 is less for this resistance；And when meeting with weather of extremely trembling with fear, the a large amount of accumulated snow of wire surface, during accumulated ice, owing to conductive layer is made up of cross sectional dimensions continually varying tinsel 200, therefore, it is filled with hole by plated space on electric wire, after hydrops penetrates into these holes, by freezing and expansion, thus each circle tinsel of conductive layer is strutted, each circle tinsel is made to be no longer abut against together, this makes the current path on conductive layer there occurs huge change, i.e. from the original state along the flowing of electric wire bearing of trend, become the state moved ahead around wire rotating, i.e. as in Fig. 4 right part illustrated, electric current can only detour as shown in curve arrow, now, the cross-sectional area of tinsel 200 is π d2/ 4, each circle Zhou Changwei wiry π D；Electric current flow to the resistance M2=ρ π D/(π d suffered by a rear circle from previous circle2/ 4)=4 ρ D/ d2；Thus, M1/M2=(3 ρ/π D)/(4 ρ D/ d2)=3 d2/πD2≈d2 /D2;Usually, the diameter d of tinsel 200 takes about 0.8mm, can obtain thinner；And each circle nominal diameter wiry D, also it is the diameter of conductive layer, according to the rugosity of current high-voltage line, desirable about 16mm；Then M1/M2 ≈ 1/400；
As can be seen here, when accumulated ice or accumulated snow on power transmission line, the resistance of power transmission line has increased hundreds of times suddenly, makes the pressure drop on power transmission line suddenly improve, and conductive layer is brought rapidly up heating, thus the accumulated snow on power transmission line, accumulated ice is melted, and makes power transmission line break from accumulated snow, accumulated ice.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. made, should be included within the scope of the present invention.
Claims (4)
1. a high-altitude power transmission line, including at least non-conductive core (1)；This non-conductive core outer wrap at least one of which conductive layer (21,22)；Described conductive layer is formed by the coiling of a continuous print tinsel (200), forms an extension spring, and each circle of described extension spring relies closely；The direction that described tinsel (200) extends along tinsel itself, has the cross section in periodically continued change；Described non-conductive core (1) has elasticity, and when stretching and keeping suitable internal stress, at conductive layer described in its surface coiling.
High-altitude the most according to claim 1 power transmission line, it is characterised in that: described continually varying cross section has the feature that the sideline of twice up and down of any one longitudinal section of described tinsel (200) is the sine curve about tinsel axisymmetrical.
High-altitude the most according to claim 1 and 2 power transmission line, it is characterised in that: described conductive layer has 1～3 layer.
High-altitude the most according to claim 3 power transmission line, it is characterised in that: it is provided with insulating barrier between the described conductive layer of each layer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410488097.5A CN104200893B (en) | 2014-09-23 | 2014-09-23 | High-altitude power transmission line |
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| CN201410488097.5A CN104200893B (en) | 2014-09-23 | 2014-09-23 | High-altitude power transmission line |
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| CN104200893B true CN104200893B (en) | 2016-09-21 |
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| CN111928818A (en) * | 2020-09-09 | 2020-11-13 | 四川长园工程勘察设计有限公司 | Distribution line section diagram generation method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08195126A (en) * | 1995-01-18 | 1996-07-30 | Mitsui Eng & Shipbuild Co Ltd | Ice/snow sticking prevention type power transmission line |
| JP2001118434A (en) * | 1999-08-09 | 2001-04-27 | Furukawa Electric Co Ltd:The | Low wind-pressure insulation electric wire |
| CN201408563Y (en) * | 2009-02-26 | 2010-02-17 | 江苏通光强能输电线科技有限公司 | Ice and snow proofing overhead conductor |
| CN101702332A (en) * | 2009-06-15 | 2010-05-05 | 中铁电气化局集团有限公司 | Ice-coating-proof power conducting wire |
| CN202487268U (en) * | 2012-04-08 | 2012-10-10 | 河南科信电缆有限公司 | Composite carbon fiber cable |
-
2014
- 2014-09-23 CN CN201410488097.5A patent/CN104200893B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08195126A (en) * | 1995-01-18 | 1996-07-30 | Mitsui Eng & Shipbuild Co Ltd | Ice/snow sticking prevention type power transmission line |
| JP2001118434A (en) * | 1999-08-09 | 2001-04-27 | Furukawa Electric Co Ltd:The | Low wind-pressure insulation electric wire |
| CN201408563Y (en) * | 2009-02-26 | 2010-02-17 | 江苏通光强能输电线科技有限公司 | Ice and snow proofing overhead conductor |
| CN101702332A (en) * | 2009-06-15 | 2010-05-05 | 中铁电气化局集团有限公司 | Ice-coating-proof power conducting wire |
| CN202487268U (en) * | 2012-04-08 | 2012-10-10 | 河南科信电缆有限公司 | Composite carbon fiber cable |
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Inventor after: Hu Fuchang Inventor after: Zhang Longjiang Inventor after: Zhang Guodong Inventor after: Jingfuqing Inventor after: Du Juan Inventor after: Pan Xingbin Inventor after: Zhao Yunpeng Inventor after: Liang Kang Inventor after: Xin Yuejuan Inventor after: Zhang Hongliang Inventor after: Feng Chao Inventor after: Wei Fachang Inventor after: Li Fenge Inventor after: Sun Yuying Inventor after: Zou Baozhen Inventor after: Zhang Weidong Inventor after: Feng Yaozhong Inventor after: Liu Jiayun Inventor after: Xu Qing Inventor after: Cao Guodong Inventor after: Zou Haitao Inventor after: Lu Peng Inventor after: Sha Xianguang Inventor after: Song Qingfang Inventor after: Gu Lingjie Inventor before: Ma Genchang |
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Effective date of registration: 20160825 Address after: 252500 Guanxian city of Liaocheng province Shandong Yichun crown Road South 160309 hills Building 1 (spring) Applicant after: GUANXIAN POWER SUPPLY COMPANY OF STATE GRID HENAN ELECTRIC POWER COMPANY Address before: Wuzhong City Building No. 388 Suzhou City, Wuzhong District province Jiangsu Soochow road 2107 room 215100 Applicant before: Ma Genchang |
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Effective date of registration: 20180416 Address after: 226500 Rugao City, Nantong, Jiangsu, No. 268, Fu Shou Road, town. Patentee after: JIANGSU QIYING WIRE CABLE CO.,LTD. Address before: 252500 Guanxian city of Liaocheng province Shandong Yichun crown Road South 160309 hills Building 1 (spring) Patentee before: GUANXIAN POWER SUPPLY COMPANY OF STATE GRID HENAN ELECTRIC POWER COMPANY |
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Denomination of invention: Overhead transmission line Effective date of registration: 20220704 Granted publication date: 20160921 Pledgee: Bank of China Limited Rugao Branch Pledgor: JIANGSU QIYING WIRE CABLE CO.,LTD. Registration number: Y2022980009746 |
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Date of cancellation: 20230627 Granted publication date: 20160921 Pledgee: Bank of China Limited Rugao Branch Pledgor: JIANGSU QIYING WIRE CABLE CO.,LTD. Registration number: Y2022980009746 |
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Denomination of invention: High altitude transmission line Effective date of registration: 20230703 Granted publication date: 20160921 Pledgee: Bank of China Limited Rugao Branch Pledgor: JIANGSU QIYING WIRE CABLE CO.,LTD. Registration number: Y2023980046468 |
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