power cable survey
Insulated cables that can safely and reliably transmit large capacity electric energy for a long time are called "power cables".
The use of power cables comes into being with the generation of electricity. In 1879, the American inventor Edison wrapped jute on a copper rod and threaded it into an iron pipe, then filled it with asphalt mixture to make a cable, and laid the cable in New York, creating underground power transmission. The next year, the Englishman Karen de invented the asphalt impregnated paper insulated power cable. In 1911, Germany laid 60kV high-voltage cables, starting the development of high-voltage cables. In 1952, Sweden laid 380 kV ultra-high voltage cables in the northern power plant, realizing the application of ultra-high voltage cables. By the 1980s, 1100kV and 1200kV UHV power cables had been made.
It can be seen from the development history of power cables that every upgrade of power cable products is closely related to the materials used for power cables. Due to different needs, power cables should naturally have a wide range of excellent and stable performance. The service life and performance of power cable depend on the rationality and advancement of power cable structure, the rationality of material use, and the advanced integrity of process.
Technical characteristics of power cable
It shall be able to withstand high or extremely high working voltage for a long time, and shall have excellent electrical insulation performance and be able to transmit large current. Therefore, conductive cables with a cross-sectional area of hundreds or even thousands of square millimeters will be used.
The power cable adopts a variety of combined protective layer structures,
It can adapt to various laying methods and use environments (underground, underwater, trench pipe, tunnel, shaft, etc.). The high-voltage insulation technology, high current transmission technology, structure coordination, sheath structure, etc. that power cables rely on represent the academic level of these aspects in the electrical discipline.
