Large-section molded line split conductor
By adopting a central pressure conductor and type wire twisted conductor in large cross -section cable conductors, and wrapped insulating paper on the outside, the electrical energy consumption of the conductor due to the increase in the skin collection effect and the increase of the resistance is solved. Round neatness and high fill coefficients improve the transmission efficiency and safety of the cable.
Patent Information
- Application Number
- CN202421044665.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-14
- Publication Date
- 2025-01-24
- Estimated Expiration
- 2034-05-14
AI Technical Summary
During operation, large-section cable conductors have increased effective resistance due to skin effect and proximity effect, resulting in excessive electrical energy consumption. At the same time, traditional conductor materials are fragile and instable insulating properties, which affects the joint connection and construction efficiency.
Large-section profiled wires are used to divide the conductors, including a centrally pressed conductor and a profiled stranded conductor, and the outside is wrapped with insulating paper to improve the roundness and filling factor of the conductor, reduce resistance and enhance insulation performance.
By improving the roundness and filling factor of the conductor, the area occupied by the conductor is reduced, the material consumption is reduced, the transmission efficiency and safety of the cable are improved, and the problems of local overheating and excessive loss of power are avoided.
Smart Images
Figure CN222394619U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of conductors of power transmission cables, in particular to a large-section wire-segmented conductor used for alternating current high-voltage cables. Background Art
[0002] With the continuous and rapid development of my country's national economy and the continuous improvement of people's living standards, the demand for electricity in various industries is increasing. The insufficient supply of electric energy has become one of the important factors restricting the continuous and rapid development of my country's national economy. Therefore, it has become a consensus in the power industry to further increase the transmission voltage level and increase the cross-sectional area of the transmission line cable conductor.
[0003] However, during the operation of cable conductors with large cross-sections, there will be skin effect and proximity effect, which will increase the effective resistance of the conductor. When low-frequency current flows through thin wires, skin effect and proximity effect can be ignored, but the higher the high-frequency frequency and the larger the conductor cross-section, the more skin effect and proximity effect cannot be ignored. Especially in cable conductors with large cross-sections, the skin effect and proximity effect are the main reasons for the AC resistance being much higher than the DC resistance, causing a large amount of electrical energy consumption. The surface of the traditional round wire compact split conductor is not round after the conductor is stranded, and the overall filling factor is low, resulting in a large conductor area, which affects the material consumption of subsequent insulation and other processes. At the same time, although the use of shaped wire stranded conductors can improve the overall roundness of the conductor, the insulation performance of the oxidized conductor is unstable, and there are problems of local overheating and excessive power loss. Furthermore, the existing oxidized conductors use enameled conductors, which are relatively fragile in themselves, and the enameled conductors are not conducive to the connection of the joints, which easily cause the problem of excessive contact resistance during crimping; or the enameled layer or oxide layer must be removed during the joint, which affects the construction efficiency and quality of the joint.
[0004] Therefore, those skilled in the art are committed to developing a large-section wire-segmented conductor that can improve transmission efficiency and safety. Utility Model Content
[0005] In view of the above-mentioned defects of the prior art, the utility model discloses a large-section wire-splitting conductor, and the technical problem to be solved is to develop a large-section wire-splitting conductor that can improve transmission efficiency and safety.
[0006] To achieve the above purpose, the utility model provides a large-section profiled wire segmented conductor, including a central compressed conductor, a profiled wire stranded conductor is arranged outside the central compressed conductor, and insulating paper is wrapped between and outside the profiled wire stranded conductors.
[0007] Preferably, the central compressed conductor is formed by compressing a number of round wires to improve the conductivity and mechanical strength of the conductor. The roundness of the conductor can also be improved by compressing the round wires.
[0008] Preferably, the stranded conductor is formed by twisting at least two layers of non-oxidized stranded wires. Existing oxidized conductors use enameled conductors, which are relatively fragile. Moreover, the use of enameled conductors is not conducive to the connection of joints, and it is easy to cause excessive contact resistance during crimping, or the enameled layer or oxide layer must be removed during the joint, which affects the construction efficiency and quality of the joint. By using non-oxidized stranded wire, the above existing technical problems can be solved, the strength of the conductor itself can be improved, the insulation performance of the conductor can be ensured to be stable, and the installation efficiency during the joint can be improved.
[0009] Preferably, the designed cross-sectional area of the large cross-sectional wire segmented conductor is S, and the size of S is 800≤S≤3000mm 2 When implementing the utility model, the size and specification of the central compressed conductor are first determined according to the design requirements, and then the wire stranded conductor is twisted around the central compressed conductor according to the set number of layers and arrangement method; in the twisting process, the designed conductor cross-sectional area is first determined. When the designed conductor cross-sectional area is greater than 3000mm 2 Or less than 800mm 2 , is not applicable to the present utility model.
[0010] Preferably, when the designed cross-sectional area S≤1600mm 2 When the stranded conductor includes a first stranded conductor, the insulating paper is provided between the central compressed conductor and the first stranded conductor. That is, the two-part form is adopted, and a layer of insulating paper is used to isolate the central compressed conductor from the first stranded conductor, forming a two-part form.
[0011] Preferably, when the designed cross-sectional area S>1600mm 2 When, the stranded conductor includes a first strand conductor and a second strand conductor, and the insulating paper is respectively arranged between the central compressed conductor and the first strand conductor and between the second strand conductor and the first strand conductor, that is, a three-part form is formed.
[0012] In principle, the area of each segment should not be larger than 800mm. 2 , the areas of each segmented block should be kept as close as possible, and the area of the outer segmented block can be slightly larger than the area of the inner segmented block. In principle, the segmented block should have a larger surface area to reduce the additional power loss caused by the skin effect.
[0013] Preferably, the twisting tightness and roundness of each layer of the stranded conductor should be ensured to ensure the overall performance of the conductor, and each layer of the stranded conductor is only allowed to have one joint, and the joint strength of each layer of the stranded conductor is greater than 80% of the design strength. At the same time, necessary measures should be taken to ensure that the joint surface is smooth and free of defects.
[0014] Preferably, the insulating paper is wrapped in two overlapping layers, and the overlapping rate is greater than 50%.
[0015] The beneficial effects of the utility model are:
[0016] Through the structural design of large-section wire segmented conductors, the insulating paper is located between the wire-twisted conductors and outside the conductors, which is used to isolate the various parts of the conductors to prevent current leakage and short circuit. While the utility model uses insulating paper to isolate the various parts of the conductor, it also uses round wire to compress the conductor in the center, and uses two layers of wire-twisted conductors as a group of wire conductors, which achieves high roundness and high filling factor of the conductor, good conductivity, reduces the area occupied by the conductor, is conducive to reducing the material consumption of subsequent insulation processes, and improves the transmission efficiency and safety of the cable. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a structural schematic diagram of a specific implementation mode 1 of the utility model;
[0018] Figure 2 It is a structural schematic diagram of specific implementation mode 2 of the present utility model.
[0019] In the above drawings: 1. Central compressed conductor; 2. Twisted wire conductor; 21. First wire conductor; 22. Second wire conductor; 3. Insulating paper. DETAILED DESCRIPTION
[0020] The present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific manner, and therefore cannot be understood as a limitation on the present invention. The terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.
[0021] like Figure 1 and Figure 2As shown, the utility model provides a large-section profile wire segmented conductor, including a central compressed conductor 1, a profile wire stranded conductor 2 is arranged outside the central compressed conductor 1, and insulating paper 3 is wrapped between the profile wire stranded conductors 2 and outside the profile wire stranded conductors 2. The central compressed conductor 1 is formed by compressing a number of round wires to improve the electrical conductivity and mechanical strength of the conductor. At the same time, the roundness of the conductor can also be improved by compressing the round wires. At the same time, the profile wire stranded conductor 2 is formed by twisting at least two layers of non-oxidized profile wires. Existing oxidized conductors use enameled conductors, which are relatively fragile. Moreover, the use of enameled conductors is not conducive to the connection of joints, which can easily cause excessive contact resistance during crimping, or the enameled layer or oxide layer must be removed during the joint, affecting the construction efficiency and quality during the joint. By using non-oxidized profile wires, the above-mentioned existing technical problems can be solved, the strength of the conductor itself can be improved, the insulation performance of the conductor can be ensured to be stable, the problems of local overheating and excessive loss of electricity can be avoided, and the installation efficiency during the joint can be improved.
[0022] On the other hand, the twisting tightness and roundness of each layer of the stranded conductor 2 should be ensured to ensure the overall performance of the conductor, and each layer of the stranded conductor is only allowed to have one joint, and the joint strength of each layer of the stranded conductor 2 is greater than 80% of the design strength. At the same time, necessary measures should be taken to ensure that the joint surface is smooth and free of defects. The insulating paper 3 is wrapped in two overlapping layers, and the overlap rate is greater than 50%.
[0023] In the above embodiments, through the structural design of the large-section wire segmented conductor, the insulating paper 3 is located between the wire stranded conductors 2 and outside the conductors, which is used to isolate the various parts of the conductor to prevent current leakage and short circuit. While the utility model uses the insulating paper 3 to isolate the various parts of the conductor, it also uses round wire to compress the conductor in the center, and uses two layers of wire stranded conductors 2 as a group of wire conductors, which achieves high roundness and high filling factor of the conductor, good conductivity, reduces the area occupied by the conductor, is conducive to reducing the material consumption of subsequent insulation processes, and improves the transmission efficiency and safety of the cable.
[0024] Furthermore, the design cross-sectional area of the large cross-sectional wire segment conductor is S, and the size of S is 800≤S≤3000mm 2 , the conductor design cross-section can reach up to 3000mm 2 , meeting the design requirements of conventional high-voltage cables. When implementing the utility model, the size and specification of the central compressed conductor 1 are first determined according to the design requirements, and then the profiled stranded conductor 2 is stranded around the central compressed conductor 1 according to the set number of layers and arrangement. During the stranding process, the designed conductor cross-sectional area is first determined. When the designed conductor cross-sectional area is greater than 3000mm 2 Or less than 800mm 2 At the same time, in principle, the area of each segment block cannot be greater than 800mm 2, the areas of each segmented block should be kept as close as possible, and the area of the outer segmented block can be slightly larger than the area of the inner segmented block. In principle, the segmented block should have a larger surface area to reduce the additional power loss caused by the skin effect.
[0025] Different structures can be used according to the different cross-sectional areas of the designed conductors. The specific implementation methods are as follows:
[0026] Implementation Method 1
[0027] like Figure 1 As shown, when the design cross-sectional area S≤1600mm 2 When the stranded conductor 2 includes a first stranded conductor 21, an insulating paper 3 is provided between the central compressed conductor 1 and the first stranded conductor 21. That is, a two-part form is adopted, and a layer of insulating paper 3 is used to isolate the central compressed conductor 1 from the first stranded conductor 21, forming a two-part form.
[0028] Implementation Method 2
[0029] like Figure 2 As shown, when the design cross-sectional area S>1600mm 2 The stranded conductor 2 includes a first strand conductor 21 and a second strand conductor 22, and insulating paper 3 is provided between the center compressed conductor 1 and the first strand conductor 21 and between the second strand conductor and the first strand conductor 21, forming a three-part split form.
[0030] The preferred specific embodiments of the utility model are described in detail above. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the utility model without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field based on the concept of the utility model through logical analysis, reasoning or limited experiments on the basis of the existing technology should be within the scope of protection determined by the claims.
Claims
1. A large cross-section wire-splitting conductor, characterized in that: It comprises a central compressed conductor (1), a profiled wire stranded conductor (2) is arranged outside the central compressed conductor (1), and insulating paper (3) is wrapped between the profiled wire stranded conductors (2) and outside the profiled wire stranded conductors (2).
2. The large cross-section wire segmentation conductor according to claim 1, characterized in that: The central compressed conductor (1) is formed by compressing a plurality of round wires.
3. The large cross-section wire segmentation conductor according to claim 1, characterized in that: The shaped wire stranded conductor (2) is formed by twisting at least two layers of non-oxidized shaped wires.
4. The large cross-section wire segmentation conductor according to claim 1, characterized in that: The design cross-sectional area of the large cross-sectional wire segmented conductor is S, and the size of S is 800≤S≤3000mm 2 .
5. The large cross-section wire segmentation conductor according to claim 4, characterized in that: When the design cross-sectional area S≤1600mm 2 When the shaped-wire stranded conductor (2) comprises a first shaped-wire conductor (21), the insulating paper (3) is provided between the central compressed conductor (1) and the first shaped-wire conductor (21).
6. The large cross-section wire segmentation conductor according to claim 4, characterized in that: When the design cross-sectional area S>1600mm 2 When the shaped wire stranded conductor (2) comprises a first shaped wire conductor (21) and a second shaped wire conductor (22), the insulating paper (3) is provided between the center compressed conductor (1) and the first shaped wire conductor (21) and between the second shaped wire conductor (22) and the first shaped wire conductor (21).
7. The large cross-section wire segmentation conductor according to claim 4, characterized in that: The joint strength of each layer of the shaped wire stranded conductor (2) is greater than 80% of the designed strength.
8. The large cross-section wire segmentation conductor according to claim 1, characterized in that: The insulating paper (3) is wrapped in two overlapping layers, and the overlap rate is greater than 50%.