High-voltage low-loss optical fiber composite submarine cable with huge section and preparation method thereof

Abstract

The invention discloses a high-voltage low-loss optical fiber composite submarine cable with a huge section and a preparation method thereof. The submarine cable comprises cable cores, an optical unit and a filling strip. The submarine cable also comprises a wrapping band, a lining layer, an armor layer and a coat layer which are coated in sequence. Each cable core is composed of a water-blocking conductor, a conductor shielding layer, an insulation layer, an insulation shielding layer, a water-blocking buffer layer, a lead sleeve and an outer sheath which are arranged from the inside to the outside in sequence. The cable cores are twisted to form a central hole. The optical unit is placed in the central hole. According to the cable and the method, an advanced production device is employed, so the production efficiency and finished product quality of the submarine cable are improved. The prepared submarine cable has the following advantages that the optical unit is placed into the central hole formed after the cable cores are twisted to form the cable, so the optical unit is not stressed at all in production and layout processes; the filling strip is made of a semiconductor material, so equipotential is formed between the lead sleeves and the armor layers, thermal resistance losses in a transportation process are effectively reduced, and the global energy crisis is mitigated; and the current capacity consistency of the whole cable is realized based on structure design of the armor layers.

Description

technical field [0001] The invention relates to the technical field of submarine cable preparation, in particular to a super-large cross-section, high-voltage, low-loss optical fiber composite submarine cable and a preparation method thereof. The prepared cable can be used as a 10-750kV three-core submarine power cable. Background technique [0002] Common optical fiber composite three-core submarine power cables at present, such as the submarine power cable disclosed by CN 202394580 U and the composite cable disclosed by CN 201984890 U. The cable core of the former is composed of a water-blocking conductor and an inner shielding layer, an insulating layer, an outer shielding layer and a water-blocking buffer layer arranged outside the water-blocking conductor in sequence, and an optical cable unit is arranged in the gap of the cable core, and the space around the optical cable unit The filler is filled with a filler, and the filler and the power cable are provided with a wr...

AI Technical Summary

Problems solved by technology

[0004] The technical problem mainly solved by the present invention is to provide a super-large cross-section high-voltage low-loss optical fi...

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