Moderate-strength abnormally-shaped heat-resistant aluminum alloy overhead conductor

Abstract

The invention discloses a moderate-strength abnormally-shaped heat-resistant aluminum alloy overhead conductor. The moderate-strength abnormally-shaped heat-resistant aluminum alloy overhead conductor is composed of a heat-resistant circular aluminum alloy core wire (1) on an inner layer, single heat-resistant trapezoid aluminum alloy wires (2) on a middle layer and single heat-resistant circular aluminum alloy wires (3) on an outer layer in a twisting mode. The section of each single heat-resistant trapezoid aluminum alloy wire (2) is trapezoid, the five layers of the single heat-resistant trapezoid aluminum alloy wires (2) on the middle layer are stranded around the heat-resistant circular aluminum alloy core wire (1) from inside to outside in a concentric mode, and the number of each layer of the single heat-resistant trapezoid aluminum alloy wires (2) is at least six. The moderate-strength abnormally-shaped heat-resistant aluminum alloy overhead conductor is a novel overhead conductor, and the gap in the domestic market is filled in. The moderate-strength abnormally-shaped heat-resistant aluminum alloy overhead conductor has the advantages that the alternating-current resistance is low, connection is convenient and easy, the electromagnetic induction loss does not exist, the line loss is low, the creep resistance performance is good, and circuit sag cannot easily change. Compared with aluminum-magnesium-silicon high-strength aluminum alloy, the moderate-strength abnormally-shaped heat-resistant aluminum alloy overhead conductor has more advantages, the production technology is simple, the cost is low, and the efficiency is high.

Description

technical field [0001] The invention relates to an electric power overhead wire, in particular to a medium-strength heat-resistant aluminum alloy special-shaped overhead wire. Background technique [0002] In the process of applying high-strength aluminum alloy in China, steel core high-strength aluminum alloy stranded wire is generally used, and it is used in large-span and heavy ice areas. All-aluminum alloy stranded wire has also been used to a certain extent in recent years, but due to its low conductivity, it is still difficult to popularize and apply it in large quantities. The two aluminum alloy wire types LHA1 and LHA2 in my country's wire standard GB / T1179-2008 are high-strength aluminum alloys with conductivity of 52.5% IACS and 53% IACS respectively, and the hard aluminum wire LY9 used in ACSR Compared with the conductivity of 61% IACS, its DC resistance will increase by about 15% when the wire cross section is the same, and its resistance loss will also increase ...

AI Technical Summary

Problems solved by technology

Medium-strength all-aluminum alloy stranded wire has the characteristics of low resistance loss, good sag characteristics, no hysteresis loss, and good overload performance. Therefore, medium-strength all-aluminum alloy stranded wire is likely to become one of the main types of overhead conductors in the future. , but there are no related products on the market

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