CN220357855U - Low sag capacity-increasing type low wind pressure overhead conductor - Google Patents
Low sag capacity-increasing type low wind pressure overhead conductor Download PDFInfo
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- CN220357855U CN220357855U CN202321756759.3U CN202321756759U CN220357855U CN 220357855 U CN220357855 U CN 220357855U CN 202321756759 U CN202321756759 U CN 202321756759U CN 220357855 U CN220357855 U CN 220357855U
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- 239000004020 conductor Substances 0.000 title claims description 29
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 26
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 12
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical group C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000010959 steel Substances 0.000 claims abstract description 12
- 229910001374 Invar Inorganic materials 0.000 claims abstract description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 8
- 229910052782 aluminium Inorganic materials 0.000 claims description 8
- 230000007774 longterm Effects 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 abstract description 11
- 230000009466 transformation Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 7
- 230000009471 action Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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Abstract
The application relates to a low sag capacity-increasing type low wind pressure air wire, the wire comprises bearing core and conducting layer, wherein: the bearing core is an aluminum-clad steel stranded wire core or an invar steel stranded wire core or a carbon fiber core rod, the conducting layer comprises an inner conducting layer and an outer conducting layer, the inner conducting layer and the outer conducting layer are formed by stranding a plurality of S-shaped, Z-shaped or T-shaped heat-resistant aluminum alloy wires, and the surface of each heat-resistant aluminum alloy wire on the outer conducting layer is provided with a single or a plurality of grooves. The lead is particularly suitable for capacity-increasing transformation of the electric old line of the coastal urban power grid, and can realize line capacity-increasing by more than 60% by utilizing the original pole tower and the transmission channel. Meanwhile, due to the fact that the wind pressure on the surface of the wire is reduced, wind pressure waving of the wire under typhoon conditions can be reduced, and therefore stability and safety of line operation are effectively improved.
Description
Technical Field
The application relates to the technical field of overhead conductors, in particular to a low-sag capacity-increasing type low-wind pressure overhead conductor.
Background
In recent years, under the drive of the national 'double carbon' target, the novel electric power system accelerates the construction, the energy structure is continuously adjusted, the electric energy is replaced deeply, and the power generation capacity of the electric power system is continuously increased. In addition, with the improvement of industrial production and people's living demands, the demand of electric loads is also increasing continuously. The power grid is used as a channel for electric energy transmission and distribution, and is also continuously developed towards a large capacity.
For newly built grids, the transmission capacity is increased, and the transmission capacity is easily increased by increasing the capacity of related components. But for existing grids, it is relatively difficult to increase transmission capacity. In particular, the old line is removed and rebuilt due to the influence of the line path, the removal cost, the construction period and other factors.
For coastal cities, old lines of the power grid are reformed, and besides factors such as line paths, removal cost, construction period and the like, the influence of typhoons is considered. The typhoons are statistically mostly above 25 m/s in wind speed. According to the simulated wind tunnel test, the surface wind pressure of the common overhead conductor is continuously increased along with the increase of wind speed, and under the typhoon condition, the conductor is collided due to wind pressure, so that accidents such as wire burn-off, strand breakage and wire breakage, hardware wear, line tripping, even tower dumping and the like are caused, and a lot of potential safety hazards exist.
Disclosure of Invention
An object of the embodiment of the application is to provide a low sag capacity-increasing type low wind pressure overhead conductor, because the reduction of conductor surface wind pressure can reduce the wind pressure galloping of wire under the typhoon condition to improve the stability and the security of circuit operation effectively.
In order to achieve the above purpose, the present application provides the following technical solutions:
in a first aspect, embodiments of the present application provide a low sag, compatibilized low wind pressure overhead conductor, the conductor comprising a load bearing core and a conductive layer, wherein: the bearing core is an aluminum-clad steel stranded wire core or an invar steel stranded wire core or a carbon fiber core rod, the conducting layer comprises an inner conducting layer and an outer conducting layer, the inner conducting layer and the outer conducting layer are formed by stranding a plurality of S-shaped, Z-shaped or T-shaped heat-resistant aluminum alloy wires, and the surface of each heat-resistant aluminum alloy wire on the outer conducting layer is provided with a single or a plurality of grooves.
The inner layer and the outer layer of the conductive layer adopt 8+12 structures, namely 8 heat-resistant aluminum alloy wires are stranded to form the inner layer of the conductive layer, and 12 heat-resistant aluminum alloy wires are stranded to form the outer layer of the conductive layer.
And a single groove is formed in the surface of each heat-resistant aluminum alloy wire on the outer layer of the conductive layer, the single groove is designed along the axial direction of the wire, and the cambered surface radius of the groove is 0.6mm.
Two grooves are formed in the surface of each heat-resistant aluminum alloy wire on the outer layer of the conductive layer, the two grooves are designed along the axial direction of the wire, and the cambered surface radius of each groove is 0.4mm.
When the bearing core is an aluminum-clad steel stranded wire core, 7 aluminum-clad steel wires with the diameter of 3.18mm are stranded into the bearing core, and the tensile strength of the aluminum-clad steel wires is not less than 1770MPa and the elongation at break is not less than 2%.
When the bearing core is a carbon fiber core rod, 1 carbon fiber core rod with the diameter of 8.0mm is used as the bearing core, the minimum tensile strength of the carbon fiber core rod is 2400MPa, and the long-term allowable use temperature is 160 ℃.
Compared with the prior art, the utility model has the beneficial effects that:
the low-sag capacity-increasing type low-wind pressure overhead conductor is suitable for capacity-increasing reconstruction of old and old lines in coastal cities or large wind areas.
The low sag capacity-increasing type low wind pressure overhead conductor has the following advantages: compared with the steel-cored aluminum strand with the same diameter, the conductive section of the wire is increased by 5-10%, and the running temperature is increased from 70 degrees to more than 150 degrees. The transmission capacity is improved by more than 60 percent, and when the span of the overhead wire is 300-500 meters, the sag is reduced by more than 1.5 meters. When the wind speed is above 25 m/s, the wind pressure can be reduced by about 30 percent. The lead is particularly suitable for capacity-increasing transformation of the electric old line of the coastal city power grid, and can realize the capacity increase of the line by more than 60% by utilizing the original pole tower and the transmission channel. Meanwhile, due to the fact that the wind pressure on the surface of the wire is reduced, wind pressure waving of the wire under typhoon conditions can be reduced, and therefore stability and safety of line operation are effectively improved 。
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic cross-sectional view of an overhead conductor of a first embodiment;
fig. 2 is a schematic cross-sectional structure of an overhead conductor of the second embodiment.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The terms "first," "second," and the like, are used merely to distinguish one entity or action from another entity or action, and are not to be construed as indicating or implying any actual such relationship or order between such entities or actions.
As shown in fig. 1, the embodiment of the present application provides a low sag capacity-increasing type low wind pressure overhead conductor, which is composed of a carrier core 1 and a conductive layer, wherein: the bearing core 1 is an aluminum clad steel stranded wire core or an invar steel stranded wire core or a carbon fiber core rod, the conductive layer comprises a conductive layer inner layer 2 and a conductive layer outer layer 3, the conductive layer inner layer 2 and the conductive layer outer layer 3 are formed by stranding a plurality of S-shaped, Z-shaped or T-shaped heat-resistant aluminum alloy wires, and the surface of each heat-resistant aluminum alloy wire of the conductive layer outer layer is provided with a single or a plurality of grooves.
Example 1
As shown in fig. 1, the low sag capacity-increasing type low wind pressure overhead conductor of the present embodiment includes: 1. a load bearing core; 2. an inner layer of the conductive layer; 3. and an outer layer of the conductive layer.
The preparation method comprises the following steps:
7 aluminum-clad steel wires with the diameter of 3.18mm are twisted into the bearing core 1, and the tensile strength of the aluminum-clad steel wires is not less than 1770MPa and the elongation at break is not less than 2%. 8Z-shaped heat-resistant aluminum alloy wires with the equivalent circular diameter of 4.72mm are stranded on the bearing core 1 to form the conducting layer inner layer 2, the tensile strength of the heat-resistant aluminum alloy wires is not less than 225MPa, the conductivity is not less than 55% IACS, and the continuous operation temperature (40 years) is allowed to be 150 ℃. 12S-shaped heat-resistant aluminum alloy wires with the equivalent circular diameter of 4.72mm are stranded on the bearing core 1 to form the conducting layer outer layer 3, the tensile strength of the heat-resistant aluminum alloy wires is not less than 225MPa, the conductivity is not less than 55% IACS, the continuous operation temperature (40 years) is allowed to be 150 ℃, each S-shaped heat-resistant aluminum alloy wire is provided with two longitudinal grooves, and the cambered surface radius of each groove is 0.4mm.
The low sag capacity-increasing type low wind pressure overhead conductor 350/55 prepared by the inspection method has 65% higher transmission capacity than steel-cored aluminum stranded wires with the same diameter, and sag is reduced by 2 meters when the span of the overhead wire is 400 meters. In wind tunnel test, the wind speed is 25 m/s, and the wind resistance coefficient is 0.83.
Example 2
As shown in fig. 2, as shown in fig. 1, the low sag capacity-increasing type low wind pressure overhead conductor of the present embodiment includes: 1. a load bearing core; 2. an inner layer of the conductive layer; 3. and an outer layer of the conductive layer.
As shown in fig. 2, the low sag capacity-increasing type low wind pressure overhead conductor of the present embodiment includes: 1. a load bearing core; 2. an inner layer of the conductive layer; 3. and an outer layer of the conductive layer.
The preparation method comprises the following steps:
1 carbon fiber core rod with the diameter of 8.0mm is used as a bearing core 1, the minimum tensile strength of the carbon fiber core rod is 2400MPa, and the long-term allowable use temperature is 160 ℃. 8Z-shaped heat-resistant aluminum alloy wires with the equivalent circular diameter of 4.83mm are stranded on the bearing core 1 to form the conducting layer inner layer 2, the tensile strength of the heat-resistant aluminum alloy wires is not less than 155MPa, the conductivity is not less than 60% IACS, and the continuous operation temperature (40 years) is allowed to be 150 ℃. 12S-shaped heat-resistant aluminum alloy wires with the equivalent circular diameter of 4.83mm are stranded on the bearing core 1 to form the conducting layer outer layer 3, the tensile strength of the heat-resistant aluminum alloy wires is not less than 155MPa, the conductivity is not less than 60% IACS, the continuous operation temperature (40 years) is allowed to be 150 ℃, each S-shaped heat-resistant aluminum alloy wire is provided with 1 longitudinal groove, and the cambered surface radius of the groove is 0.6mm.
The low sag capacity-increasing type low wind pressure overhead conductor 370/40 prepared by the inspection of the embodiment has 68% higher transmission capacity compared with steel-cored aluminum stranded wires with the same diameter, and sag is reduced by 3 meters when the span of the overhead conductor is 400 meters. In wind tunnel test, the wind speed is 25 m/s, and the wind resistance coefficient is 0.84.
The low sag capacity-increasing type low wind pressure overhead conductor has the following advantages: compared with the steel-cored aluminum strand with the same diameter, the conductive section of the wire is increased by 5-10%, and the running temperature is increased from 70 degrees to more than 150 degrees. The transmission capacity is improved by more than 60 percent, and when the span of the overhead wire is 300-500 meters, the sag is reduced by more than 1.5 meters. When the wind speed is above 25 m/s, the wind pressure can be reduced by about 30 percent. The lead is particularly suitable for capacity-increasing transformation of the electric old line of the coastal city power grid, and can realize the capacity increase of the line by more than 60% by utilizing the original pole tower and the transmission channel. Meanwhile, due to the fact that the wind pressure on the surface of the wire is reduced, wind pressure waving of the wire under typhoon conditions can be reduced, and therefore stability and safety of line operation are effectively improved.
The foregoing is merely exemplary embodiments of the present application and is not intended to limit the scope of the present application, and various modifications and variations may be suggested to one skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.
Claims (6)
1. The utility model provides a low sag capacity-increasing type low wind pressure air wire which characterized in that, the wire comprises load-bearing core and conducting layer, wherein: the bearing core is an aluminum-clad steel stranded wire core or an invar steel stranded wire core or a carbon fiber core rod, the conducting layer comprises an inner conducting layer and an outer conducting layer, the inner conducting layer and the outer conducting layer are formed by stranding a plurality of S-shaped, Z-shaped or T-shaped heat-resistant aluminum alloy wires, and the surface of each heat-resistant aluminum alloy wire on the outer conducting layer is provided with a single or a plurality of grooves.
2. The low sag capacity-increasing type low-wind pressure overhead conductor according to claim 1, wherein the inner conductive layer and the outer conductive layer adopt a structure of 8+12, namely 8 heat-resistant aluminum alloy wires are stranded to form an inner conductive layer, and 12 heat-resistant aluminum alloy wires are stranded to form an outer conductive layer.
3. The low sag capacity-increasing type low wind pressure overhead conductor according to claim 1, wherein a single groove is formed in the surface of each heat-resistant aluminum alloy wire on the outer layer of the conductive layer, the single groove is designed along the axial direction of the conductor, and the cambered surface radius of the groove is 0.6mm.
4. The low sag capacity-increasing type low wind pressure overhead conductor according to claim 1, wherein two grooves are formed in the surface of each heat-resistant aluminum alloy wire on the outer layer of the conductive layer, the two grooves are designed along the axial direction of the conductor, and the cambered surface radius of each groove is 0.4mm.
5. The low sag capacity-increasing type low wind pressure overhead conductor according to claim 1, wherein when the bearing core is an aluminum clad steel stranded wire core, 7 aluminum clad steel wires with the diameter of 3.18mm are stranded into the bearing core, and the tensile strength of the aluminum clad steel wires is not less than 1770MPa and the elongation at break is not less than 2%.
6. The low sag and capacity increasing type low wind pressure overhead conductor according to claim 1, wherein when the bearing core is a carbon fiber core rod, 1 carbon fiber core rod with a diameter of 8.0mm is used as the bearing core, the minimum tensile strength of the carbon fiber core rod is 2400MPa, and the long-term allowable use temperature is 160 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321756759.3U CN220357855U (en) | 2023-07-06 | 2023-07-06 | Low sag capacity-increasing type low wind pressure overhead conductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321756759.3U CN220357855U (en) | 2023-07-06 | 2023-07-06 | Low sag capacity-increasing type low wind pressure overhead conductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220357855U true CN220357855U (en) | 2024-01-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321756759.3U Active CN220357855U (en) | 2023-07-06 | 2023-07-06 | Low sag capacity-increasing type low wind pressure overhead conductor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220357855U (en) |
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2023
- 2023-07-06 CN CN202321756759.3U patent/CN220357855U/en active Active
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