Introduction To Power Cables

Power cables are cables used to transmit and distribute electric energy. They are commonly used in urban underground power grids, power station lead-out lines, internal power supply for industrial and mining enterprises, and underwater transmission lines across rivers and seas.
In power lines, the proportion of cables is gradually increasing. Power cables are cable products used to transmit and distribute high-power electric energy in the trunk lines of power systems, including 1-500kV and above various voltage levels, various insulated power cables.
The use of power cables has a history of more than 100 years. In 1879, American inventor T.A. Edison wrapped jute around a copper rod and inserted it into an iron pipe, and then filled it with asphalt mixture to make a cable. He laid this cable in New York, pioneering underground power transmission. The following year, the British Callender invented asphalt-impregnated paper insulated power cable. In 1889, the British S.Z. Ferranti laid a 10 kV oil-impregnated paper insulated cable between London and Deptford. In 1908, the UK built a 20 kV cable network. Power cables are becoming more and more widely used. In 1911, Germany laid 60 kV high-voltage cables, which marked the beginning of the development of high-voltage cables. In 1913, German M. Hochstadt developed phase-shielded cables, which improved the electric field distribution inside the cables and eliminated the tangent stress on the insulation surface, becoming a milestone in the development of power cables. In 1952, Sweden laid 380 kV ultra-high voltage cables in a power plant in the north, realizing the application of ultra-high voltage cables. By the 1980s, 1100 kV and 1200 kV ultra-high voltage power cables had been manufactured.