A high-voltage, ultra-high-voltage XLPE insulated single-core submarine power cable

Abstract

The invention discloses a high voltage and supervoltage cross-linked polyethylene insulating submarine power cable with a single core. A metal shielding layer (8) of the cable is a lead sleeve shielding layer; and a copper wire sparse winding shielding (6), which is formed by copper wire leads, is arranged between a first semiconduction water blocking buffer layer (5) and the metal shielding layer (8). And a metal armor layer is composed of nonmagnetic non-ferrous metals. According to the invention, the cable has a good mechanical property and a good corrosion resistant performance; electromagnetic losses are small; and there is enough transient and short-circuit current capacity. Therefore, the cable provided in the invention is suitable for replacing a high voltage and supervoltage AC transmission oil impregnated paper insulating submarine power cable with a single core as well as can be laid in an adverse marine usage environment; moreover, the cable has good mechanical and applicable performances.

Description

technical field [0001] The invention relates to a submarine power cable, in particular to a submarine power cable with good mechanical strength, good corrosion resistance, good wear resistance and low electromagnetic loss, which is suitable for 220-500kV AC power system. Background technique [0002] At present, the 220-500kV single-core submarine power cables used in domestic high-voltage and ultra-high-voltage AC submarine cable transmission engineering systems often use oil-impregnated paper to insulate AC submarine cables. [0003] Oil-impregnated paper insulated AC submarine cable technology has good insulation performance and stable electrical performance, and its application has been around for a long time. However, due to the limitation of its structural design, the submarine oil-immersed paper insulated cable must have a reliable oil pressure maintenance cycle and monitoring system. [0004] Compared with cross-linked polyethylene insulated submarine power cables, ...

AI Technical Summary

Problems solved by technology

[0004] Compared with cross-linked polyethylene insulated submarine power cables, the mechanical stability of the cable structure is poor, the resistance to bending damage is poor, and it is not earthquake-resistant; it is easily damaged when subjected to external force; it is difficult to use and maintain all the year round, and the cost of laying and maintenance is high; Higher technical requirements

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