Coastal windproof high-capacity transmission conductor system

Abstract

The invention discloses a coastal windproof high-capacity transmission conductor system, which comprises a capacity-increasing conductor and an anti-shear stress wire clamp, a liner is arranged in a wire groove of the anti-shear stress wire clamp, the liner wraps the capacity-increasing conductor, the capacity-increasing conductor comprises a steel core and an aluminum wire layer, the steel core is composed of a plurality of invar steels, and the aluminum wire layer is arranged in the steel core. The aluminum molded wire layer is a soft aluminum alloy wire layer, molded wires are regularly arranged on the surface of the soft aluminum alloy wire layer, and the molded wires are circumferentially arranged on the surface of the steel core in a surrounding mode in the radial direction of the steel core. The outer surface of the wire adopts a concave arc structure, so that the wind resistance coefficient is obviously reduced. The materials of the steel core and the aluminum molded wire layer and the structure of the aluminum molded wire layer work together, so that the transmission capacity of the wire system is improved, and meanwhile, the windproof performance is improved.

Description

Technical Field

[0001] The present invention relates to the field of power transmission lines, and in particular to a coastal windproof high-capacity power transmission line system. Background Art

[0002] The electricity consumption in my country's economically developed coastal areas continues to grow, and the existing power grid structure cannot meet the new electricity demand. Secondly, the frequent typhoons along the coast urgently require the improvement of the wind resistance of the transmission line system.

[0003] Existing technology often uses steel-core aluminum stranded wire as transmission conductors. However, its transmission capacity is limited and its line losses are high, making it unable to meet the transmission capacity requirements of coastal areas. To increase transmission capacity, the method of increasing the cross-sectional area of ​​the conductor is usually adopted. However, increasing the cross-sectional area may increase the weight of the conductor and the area exposed to wind, thereby affecting its wind resistance.

[0004] While using high-conductivity materials (such as soft aluminum) for transmission lines meets transmission capacity requirements, they typically have lower mechanical strength and weaker wind resistance. Furthermore, high transmission capacity requires the lines to operate at higher temperatures, which affects their mechanical strength. For example, certain materials soften at high temperatures, resulting in a decrease in tensile strength and, in turn, reduced wind resistance. Summary of the Invention

[0005] In order to overcome the above shortcomings of the prior art, the purpose of the present invention is to provide a coastal windproof high-capacity transmission line system.

[0006] The purpose of the present invention is achieved through the following technical solutions: A coastal windproof high-capacity transmission line system includes a capacity-enhancing conductor and an anti-shear stress wire clamp. A liner is provided in the wire trough of the anti-shear stress wire clamp, and the liner wraps the capacity-enhancing conductor. The capacity-enhancing conductor includes a steel core and an aluminum profile layer. The steel core is composed of multiple Invar steel wires, and the aluminum profile layer is a soft aluminum alloy wire layer. The surface of the soft aluminum alloy wire layer is in the form of regularly arranged profiles, which are arranged circumferentially along the radial direction of the steel core.

[0007] Preferably, the surface of the soft aluminum alloy wire layer is continuously distributed in the circumferential direction in a concave arc shape, presenting a regular concave-convex shape, and the concave arc is an arc-shaped profile with an inward depression in the middle.

[0008] Preferably, the inwardly recessed depth D of the concave arc is 0.6-1.3 mm.

[0009] Preferably, the curvature radius R1 of the concave arc is 0.2-1.0 mm.

[0010] Preferably, the anti-shear stress wire clamp is a bag-type structure.

[0011] Preferably, the diameter of the wire groove space in the anti-shear stress wire clamp is larger than the outer diameter of the capacity-increasing wire.

[0012] Preferably, the thickness of the anti-shear stress clamp is 8-10 mm.

[0013] Preferably, the liner is made of TPE material.

[0014] Preferably, the thickness of the pad is 3-5 cm.

[0015] Preferably, the length of the pad is greater than the length of the contact portion between the anti-shear stress clamp and the wire.

[0016] The present invention has the following advantages and beneficial effects compared to the prior art: (1) The present invention replaces the aluminum alloy material on the outer surface of the conductor with a soft aluminum alloy with higher electrical conductivity, and changes the steel core material to Invar with higher mechanical strength, thereby greatly improving the transmission capacity of the conductor without changing the tower structure and transmission corridor. The soft aluminum alloy reduces the DC resistance loss and reduces the energy loss of the conductor when transmitting large currents, allowing more electricity to be effectively transmitted; the Invar core, with its good heat resistance, prevents the conductor from excessively stretching and causing excessive sag when high currents pass through and generates high temperatures, thus avoiding strong electromagnetic interference to the surrounding environment and ensuring the stability and safety of large-capacity power transmission. The outer surface of the conductor adopts a concave arc structure, which significantly reduces the wind resistance coefficient. The synergistic effect of the steel core and the aluminum wire layer materials, as well as the aluminum wire layer structure, enables the conductor system to improve the transmission capacity while increasing wind resistance.

[0017] (2) The wire clamp adopts a bag-like structure, which will not cause the problem of excessive local mechanical pressure on the wire when multiple bolts are directly crimped onto the wire. The pad is made of TPE material, which is environmentally friendly, non-toxic, odorless, wear-resistant, has a high friction coefficient, and has a good anti-slip effect. The pad is longer than the wire, which reduces the shear stress of the wire at the wire clamp slot under the action of strong wind and gravity, thereby reducing the probability of the wire being worn and broken at the wire clamp. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a cross-sectional view of the capacity-increasing conductor.

[0019] Figure 2 Schematic diagram of the wire clamp structure to prevent shear stress.

[0020] Figure 3 This is a structural diagram of a windproof high-capacity transmission line system.

[0021] Figure 4 This is the operating effect diagram of the windproof high-capacity transmission line system.

[0022] The reference numerals are as follows: 1-Capacity-increasing conductor, 2-anti-shear stress wire clamp, 3-pad, 4-steel core, 5-aluminum wire layer. DETAILED DESCRIPTION

[0023] The purpose of the present invention is described in further detail below with reference to the accompanying drawings and specific examples. The examples cannot be described one by one here, but the implementation methods of the present invention are not limited to the following examples.

[0024] Example 1 A coastal windproof high-capacity transmission line system includes a capacity-increasing conductor 1 and an anti-shear stress wire clamp 2. The anti-shear stress wire clamp 2 is a bag-type structure with a thickness of 8-10 mm. A liner 3 is provided in the wire trough of the anti-shear stress wire clamp 2. The liner 3 is made of TPE. The diameter of the wire trough space in the anti-shear stress wire clamp 2 is larger than the outer diameter of the capacity-increasing conductor 1. The liner 3 wraps the capacity-increasing conductor 1. The length of the liner 3 is greater than the length of the contact portion between the anti-shear stress wire clamp 2 and the capacity-increasing conductor 1. After the capacity-increasing conductor 1 is installed, the anti-shear stress wire clamp 2 is connected and clamped with bolts at the top. Compared with the ship-type anti-shear stress wire clamp 2, the problem of excessive local mechanical pressure on the conductor caused by multiple bolts directly crimping the conductor is avoided.

[0025] The expanded capacity conductor 1 comprises a steel core 4, constructed from seven strands of Invar steel, and an aluminum profile layer 5, made from a soft aluminum alloy. The soft aluminum alloy layer features regularly arranged profiles, arranged radially around the steel core 4 in a circular pattern. Replacing the steel core 4 with the mechanically stronger Invar steel core, combined with the highly conductive soft aluminum alloy, significantly reduces losses and thus lowers the conductor's operating temperature when carrying high currents.

[0026] The regularly arranged profile lines are specifically arranged in a concave arc shape, continuously distributed along the circumference of the steel core 4, exhibiting a regular concave-convex pattern. The concave arc is an arc-shaped profile with an inward depression in the middle. The depth D of the inward depression of the concave arc is 0.6-1.3 mm, and the radius of curvature R1 of the concave arc is 0.2-1.0 mm. Designing the concave arc on the conductor surface to facilitate wind flow effectively reduces wind loads, compensating for the lack of mechanical strength of soft aluminum alloys. The synergistic use of the two not only enhances the conductor's wind resistance but also enables the conductor of the present application to have a high transmission capacity.

[0027] The capacity-increasing conductor system of the present invention has smaller sag during application than ordinary conductors, and has obvious advantages in terms of power transmission performance and wind resistance.

[0028] The above specific implementation manner is a preferred embodiment of the present invention and does not limit the present invention. Any other changes or other equivalent replacement methods that do not deviate from the technical solution of the present invention are included in the protection scope of the present invention.

Claims

1. A coastal windproof high-capacity transmission line system, characterized in that: The invention comprises a capacity-increasing conductor (1) and an anti-shear stress wire clamp (2), wherein a liner (3) is provided in a wire groove of the anti-shear stress wire clamp (2), and the liner (3) wraps the capacity-increasing conductor (1). The capacity-increasing conductor (1) comprises a steel core (4) and an aluminum profile wire layer (5), wherein the steel core (4) is composed of a plurality of invar steels, and the aluminum profile wire layer (5) is a soft aluminum alloy wire layer, wherein the surface of the soft aluminum alloy wire layer is in the form of regularly arranged profile wires, and is arranged in a circular shape along the radial direction of the steel core (4) and surrounding the surface of the steel core (4).

2. The coastal windproof high-capacity transmission line system according to claim 1, characterized in that: The surface of the soft aluminum alloy wire layer is continuously distributed in the circumferential direction in a concave arc shape, presenting a regular concave-convex shape, and the concave arc is an arc-shaped contour with an inward depression in the middle.

3. The coastal windproof high-capacity transmission line system according to claim 1, characterized in that: The inwardly recessed depth D of the concave arc is 0.6-1.3 mm.

4. The coastal windproof high-capacity transmission line system according to claim 1, characterized in that: The curvature radius R1 of the concave arc is 0.2-1.0 mm.

5. The coastal windproof high-capacity transmission line system according to claim 1, characterized in that: The anti-shear stress wire clamp (2) is a bag-type structure.

6. The coastal windproof high-capacity transmission line system according to claim 5, characterized in that: The diameter of the wire slot space in the anti-shear stress wire clamp (2) is larger than the outer diameter of the capacity-increasing wire (1).

7. The coastal windproof high-capacity transmission line system according to claim 1, characterized in that: The thickness of the anti-shear stress wire clamp (2) is 8-10 mm.

8. The coastal windproof high-capacity transmission line system according to claim 1, characterized in that: The liner (3) is made of TPE material.

9. The coastal windproof high-capacity transmission line system according to claim 1, characterized in that: The thickness of the pad (3) is 3-5 cm.

10. The coastal windproof high-capacity transmission line system according to claim 1, characterized in that: The length of the liner (3) is greater than the length of the contact portion between the anti-shear stress wire clamp (2) and the wire.

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