Large-section stranded conductor

Abstract

The invention relates to a large-section stranded conductor. The large-section stranded conductor comprises a coaxially arranged strengthening core and a conductor formed by a semi-hard aluminum stranded wire layer, the strengthening core is formed by twisting a plurality of strands of wires which are made of a carbon fiber composite material; and the semi-hard aluminum stranded wire layer is a multi-layer structure formed by stranding semi-hard aluminum single wires, and the sections of the semi-hard aluminum single wires are circular. The large-section stranded conductor provided by the invention is high in strength, corrosion resistant, large in current-carrying capacity, small in linear expansion coefficient, small in sag and light in weight, can meet the higher requirements of energyconservation and environmental protection in the field of overhead power transmission; and moreover, the semi-hard aluminum stranded wire layer adopts semi-hard aluminum, so that the conductivity is greatly improved compared with that of a common hard aluminum wire, the resistivity is improved by about 3% compared with that of a hard aluminum monofilament, and the power transmission loss is effectively reduced, so that the large-section stranded conductor has important economic benefits and social benefits for constructing an intelligent power grid, achieving 'clean substitution' and promotingenergy conservation and environmental protection.

Description

technical field [0001] The invention relates to the technical field of power transmission and transformation, in particular to a large cross-section twisted wire. Background technique [0002] Production and life in modern society are inseparable from electricity, and transmission lines are a necessary guarantee for electricity use. At present, the wire cores of wires used in power transmission lines are generally steel cores. However, the traditional steel core wires have a large sag, and even the problem of insufficient clearance between the wires and the ground may cause potential safety hazards. In addition, traditional rod-shaped cores are prone to damage when subjected to large-angle bending, resulting in brittle fracture. [0003] The power load in some areas is growing rapidly, and the low-loss, large-capacity, and low-sag energy-saving composite material transmission wires have attracted attention from all parties during line renovation. The carbon fiber composite...

AI Technical Summary

Problems solved by technology

At present, the wire cores of wires used in power transmission lines are generally steel cores. However, the traditional steel core wires have a large sag, and even the problem of insufficient clearance between the wires and the ground may cause potential safety hazards.

In addition, traditional rod-shaped cores are prone to damage when subjected to large-angle bending, resulting in brittle fracture

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