Large cross-sectional area power cables with radial layered stranded conductors
A technology for power cables and stranded conductors, which is applied in the field of large cross-sectional power cables, can solve the problems of unsuitable power cables, reduce skin effect, complex production processes, etc., to save mineral energy, improve average current density, and reduce costs. Effect
Active Publication Date: 2015-09-30
SHANGHAI ELECTRIC CABLE RES INST
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Problems solved by technology
Chinese utility model CN201408562Y discloses a split conductor and copper single wire, forming a layer of copper oxide film on the surface of each copper single wire, so that each copper single wire can be used as a split conductor to reduce skin effect, but its production process is complicated and the production efficiency is low , not suitable for power cables with large cross-sectional area
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[0014] Such as figure 1 and figure 2 As shown, the large cross-sectional area power cable with radially layered stranded conductors includes a conductor 1 with a circular cross-section. The conductor is divided into inner and outer layers along the radial direction. The outer layer is the outer ring conductor, and the inner layer is the center conductor. The first insulating layer 3 is set between the outer ring conductor and the central conductor, the central conductor is twisted by a plurality of fan-shaped strands, and the second insulating layer is arranged between two adjacent fan-shaped strands; the outer ring conductor is made of a plurality of fan-shaped strands. The ring-shaped strands are twisted, and a third insulating layer is arranged between two adjacent fan-shaped ring strands. Each fan-shaped strand and each fan-shaped ring strand are composed of multiple metal single wires. Through the first insulating layer, only need to divide the conductor into two layers...
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The invention discloses a large sectional area power cable of a radially layered stranded conductor, which comprises a conductor with a circular cross section, wherein the conductor is divided into an internal layer and an external layer in a radius direction; the external layer is an outer ring conductor; the internal layer is a central conductor; a first insulating layer is arranged between the outer ring conductor and the central conductor; the central conductor is formed by twisting a plurality of fan-shaped blocks; a second insulating layer is arranged between two adjacent fan-shaped blocks; the outer ring conductor is formed by twisting a plurality of fan-ring-shaped blocks; a third insulating layer is arranged between two adjacent fan-ring-shaped blocks; and each fan-shaped block and each fan-ring-shaped block are formed by a plurality of metal wires. In the large sectional area power cable of the radially layered stranded conductor, the first insulating layer is additively arranged; electric current density of a conductor middle portion is improved; without increase of the conductor, the carrying capacity of the power cable is improved; and the conductor material is saved.
Description
technical field [0001] The invention relates to a power cable, in particular to a large cross-sectional power cable with radial layered stranded conductors. Background technique [0002] Power cables are generally composed of copper conductor cores, insulation layers, metal sheaths, inner sheaths and outer layers. The conductors of power cables are generally composed of stranded copper single wires, which undertake the core function of carrying current. When the conductors pass through alternating current, the current density distribution of the conductors is not uniform due to the influence of the skin effect. With the increase of the cross section of the conductor, the effect of the current density gradually increasing from the inside to the outside is gradually significant, the average current density per unit area of the conductor is gradually reduced, the utilization rate of the conductor is gradually decreased, and its AC resistance is gradually increased. Chinese u...
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IPC IPC(8): H01B9/02H01B5/00
Inventor 徐晓峰李闯孙建生李春刚夏俊峰
Owner SHANGHAI ELECTRIC CABLE RES INST