Large sectional area power cable of radially layered stranded conductor

Abstract

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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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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