In the international arena, aluminum-magnesium-silicon type of high-strength aluminum alloy wire has been used for more than seventy years of history, due to the advantages it has and the continuous improvement of its production process, so that it is more practical use value. In Europe, represented by France, a large number of transmission lines, accounting for the vast majority of the total length of the line, Japan, the use of aluminum alloy transmission lines in more than 50%; the United States and Canada also has a large proportion; even in Southeast Asia, developing countries, like India, Indonesia, the Philippines, etc., are also used in aluminum alloy used for the conductor transmission lines.
If the aluminum alloy stranded wire and steel core aluminum stranded wire for comparison, in the same unit weight, aluminum alloy conductor has DC resistance is small, large flow-carrying capacity, large tensile strength, tensile force, such as the advantages of a single weight ratio; in the same flow-carrying capacity of the conditions of the comparison, the aluminum alloy conductor has a light weight, tensile force, tensile force, such as the advantages of a single weight ratio is larger. Aluminum alloy conductor for a single material wire, easy to install construction. It has the advantage of line construction in the line can increase the pitch, reduce the number of towers, or reduce the height of the pole, in short, it can reduce the cost of the project, so by the power sector welcome. Aluminum alloy is another direction of development of high-strength heat-resistant aluminum alloy, high-strength conductive aluminum alloy.
The current development of the world's electric power industry, on the one hand, most of the developed countries have been domestic and even transnational power grid interconnection, of course, need to be completed through the large melting long-distance power transmission. These lines use new materials to reduce power losses and extend the service life of the lines. On the other hand, developing countries, like East Asia, Southeast Asia and South America, large-scale large-capacity long-distance power delivery represents the current status quo.