A series of new technologies for the design of overhead transmission lines and new types of large-section composite conductors

Abstract

The invention discloses new technologies for characteristics of a large-section composite wire of an overhead power transmission line and a manufacturing method of the large-section composite wire. The new technologies for the characteristics of the large-section composite wire comprise various new key line design technologies for the characteristics of the large-section composite wire, such as section rigidity, wire shapes, internal force, sagging, wire stress and the like. The manufacturing method of the large-section composite wire comprises the steps that on the basis of the technologies, oval strand wires are selected for two outer layers of the composite wire; the overhead power transmission line is designed through the new key line design technologies for the wire characteristics, the wire shapes, the internal force and the stress. The potential safety hazard that the overhead power transmission line has broken lines and broken strands is eliminated fundamentally. Besides, the oval strand wires which are novel wires are used as the strand wires on the two outermost layers of the large-section composite wire designed through the new method, the electric conduction efficiency of the large-section composite wire is improved, the skid resistance capacity of the strand wires is enhanced, strength damage caused by tackle abrasion in the pay-off process of the large-section composite wire is reduced, and the fatigue limit is increased. Meanwhile, the ice carrying thickness is increased, the ice unloading capacity is enhanced obviously, and the probability of the lantern shape phenomenon is reduced.

Description

technical field [0001] The invention belongs to the technical field of electric power transmission, and in particular relates to the characteristics of a high-voltage overhead transmission line design technology and a large-section composite conductor and a new conductor invented on the basis thereof. Background technique [0002] The frequent accidents of overhead transmission lines are mostly collapsed towers and disconnected wires, which affect each other, especially wire disconnected accidents are more common, especially multi-layer and multi-strand large-section composite wires due to temperature The phenomenon of broken strands caused by friction is frequent and not easy to observe macroscopically (inner strands). These need to be studied in depth, carefully and objectively. Although there are many such studies, the effective and usable results are lacklustre. It is about the mechanical properties of wires that have not been surfaced so far. Although some have given in...

AI Technical Summary

Problems solved by technology

[0013] The purpose of the present invention is to provide new technical parameters and manufacturing methods of large-section composite conductors for high-voltage overhead transmission lines, aiming at solving the lack of design basis for existing high-voltage overhead transmission lines and improving the conductivity efficiency, improving the anti-skid ability of strands, and enhancing the anti-slip performance of conductors due to radiation. The wear and tear of the wire pulley reduces the strength of the anti-wear ability, reduces the thickness of the ice track, enhances the ice-coating and de-icing ability, and reduces the probability of the wire lantern phenomenon

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