CN111326288B

CN111326288B - Wind power generation high-voltage direct-current submarine cable

Info

Publication number: CN111326288B
Application number: CN202010247890.1A
Authority: CN
Inventors: 张宗政; 迟明; 李均; 白勇; 穆森
Original assignee: Hangzhou Zhihai Artificial Intelligence Co ltd
Current assignee: Hangzhou Zhihai Artificial Intelligence Co ltd
Priority date: 2020-04-01
Filing date: 2020-04-01
Publication date: 2021-03-30
Anticipated expiration: 2040-04-01
Also published as: CN111326288A

Abstract

The invention discloses a wind power generation high-voltage direct-current submarine cable which comprises a cable core, an inner liner, an armor layer and an outer protective layer, wherein the inner liner is sleeved outside the cable core, the armor layer is sleeved outside the inner liner, the armor layer is sleeved outside the armor layer, the armor layer is formed by spirally winding a galvanized steel wire and a copper wire at intervals outside the inner liner, the section of the galvanized steel wire is circular, the copper wire is a flat copper wire with an oval section, and the diameter of the circle is larger than that of the oval minor axis. This wind power generation high voltage direct current submarine cable's armor is twined in the inside lining layer by galvanized steel wire and copper wire interval spiral and forms outward, and galvanized steel wire and copper wire winding are intensive, because the galvanized steel wire compares flat copper wire outstanding, and the mechanical characteristic of submarine cable can fully be guaranteed in the galvanized steel wire armor, and the copper wire armor is arranged in between the galvanized steel wire armor, promotes current carrying capacity, reduces the loss.

Description

Wind power generation high-voltage direct-current submarine cable

Technical Field

The invention relates to the field of cables, in particular to a wind power generation high-voltage direct-current submarine cable.

Background

The submarine cable is a cable installed on the seabed, and is generally installed and laid on the seabed, and thus, in an area where fishery activities are performed, it is likely to be damaged by an anchor of a ship, fishing gear, or the like, or the cable may be damaged due to the occurrence of natural phenomena, such as strong sea wind caused by ocean currents or sea waves, or be scratched by the seabed. To prevent the above phenomena from causing damage to the cable, submarine cables are usually produced with the addition of armouring formed by wires.

The armouring is a cable structural reinforcement which enhances the mechanical characteristics and performance of the submarine cable and increases the resistance of the submarine cable to external damage caused to it during transport and installation.

And simultaneously, the loss and the requirement on the current-carrying capacity of the cable are also considered. Typically round or flat wires of medium and low carbon steel, galvanized steel, copper, brass, bronze or the like may be horizontally wound to form the armour.

The reduction of the armor loss is one of effective ways for improving the current-carrying capacity of the submarine cable. Common armoring comprises galvanized steel wire armoring and copper wire armoring, wherein the galvanized steel wire armoring has a large resistance value, large armoring loss and low current-carrying capacity. The copper wire armor has low resistance, high corrosion resistance and large current-carrying capacity, but the mechanical strength of the copper wire armor is obviously lower than that of the galvanized steel wire armor, and the copper wire armor is expensive.

Therefore, how to better combine the galvanized steel wire armor with the copper wire armor to ensure the mechanical characteristics of the submarine cable and protect the copper wire armor, improve the current carrying capacity and reduce the loss is the problem to be solved by the invention.

Disclosure of Invention

In order to solve the technical problem, the invention designs a wind power generation high-voltage direct-current submarine cable.

The invention adopts the following technical scheme:

the utility model provides a wind power generation high voltage direct current submarine cable, includes cable core, inner liner, armor and outer protective layer, and cable core overcoat has the inner liner, and inner liner overcoat has the armor, and the armor overcoat has the outer protective layer, and the armor is formed outside the inner liner by galvanized steel wire and copper wire interval spiral winding, and the cross-section of galvanized steel wire is circular, and the copper wire is oval-shaped flat copper wire for the cross-section, and circular shape diameter is greater than oval-shaped minor axis diameter.

Preferably, the cable core is a multi-strand cable.

Preferably, the cross-section of the inner liner is circular, a plurality of round holes are arranged in the inner liner, the inner diameter of each round hole is matched with the diameter of each cable core, and the inner liner is integrally wrapped with a plurality of cable cores. The inner liner layer keeps the cross-sectional shape, guarantees that the armor shape is complete, can not harm the copper wire of arranging in between the galvanized steel wire.

Preferably, a functional layer is arranged between the armor layer and the outer protective layer, and the functional layer is formed by spirally winding a plurality of strands of thin film polyester tapes.

Preferably, the galvanized steel wire and the copper wire are externally adhered with a layer of electrolyte barrier film.

Preferably, the outer protective layer and the inner liner layer are polyethylene layers.

Preferably, the cable core comprises a conductor, an inner semiconductor layer, an insulating layer, an outer semiconductor layer, a metal sheath and a sheath, and the conductor, the inner semiconductor layer, the insulating layer, the outer semiconductor layer, the metal sheath and the sheath are sequentially sheathed and coated.

The invention has the beneficial effects that: this wind power generation high voltage direct current submarine cable's armor is twined in the inside lining layer by galvanized steel wire and copper wire interval spiral and forms outward, and galvanized steel wire and copper wire winding are intensive, because the galvanized steel wire compares flat copper wire outstanding, and the mechanical characteristic of submarine cable can fully be guaranteed in the galvanized steel wire armor, and the copper wire armor is arranged in between the galvanized steel wire armor, promotes current carrying capacity, reduces the loss.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present invention;

FIG. 2 is a schematic view of one construction of the armor winding of the present invention;

in the figure: 1. the cable comprises a cable core, 2, an inner liner layer, 3, an armor layer, 4, a functional layer, 5, an outer protective layer, 6, a galvanized steel wire, 7, a flat copper wire, 8, a conductor, 9, an inner semiconductor layer, 10, an insulating layer, 11, an outer semiconductor layer, 12, a metal sheath, 13 and a sheath.

Detailed Description

The technical scheme of the invention is further described in detail by the following specific embodiments in combination with the attached drawings:

example (b): as shown in attached figures 1 and 2, a wind power generation high voltage direct current submarine cable, including cable core 1, inner liner 2, armor 3 and outer protective layer 5, cable core overcoat has the inner liner, inner liner overcoat has the armor, armor overcoat has the outer protective layer, the armor is formed outside the inner liner by galvanized steel wire 6 and copper wire interval spiral winding, the cross-section of galvanized steel wire is circular, the copper wire is oval-shaped flat copper wire 7 for the cross-section, circular shape diameter is greater than oval-shaped minor axis diameter. The cable core is doubled. The inner liner cross-section is circular, sets up two round holes in the inner liner, and the internal diameter and the cable core diameter cooperation of round hole, the whole cladding double-strand cable core of inner liner. And a functional layer 4 is arranged between the armor layer and the outer protective layer and is formed by spirally winding a double-strand film polyester tape. And a layer of electrolyte barrier film is adhered outside the galvanized steel wire and the copper wire. The outer protective layer and the inner liner layer are polyethylene layers. The cable core comprises a conductor 8, an inner semiconductor layer 9, an insulating layer 10, an outer semiconductor layer 11, a metal sheath 12 and a sheath 13, wherein the conductor, the inner semiconductor layer, the insulating layer, the outer semiconductor layer, the metal sheath and the sheath are sequentially sheathed and coated.

This wind power generation high voltage direct current submarine cable's armor is twined in the inside lining layer by galvanized steel wire and copper wire interval spiral and forms outward, and galvanized steel wire and copper wire winding are intensive, because the galvanized steel wire compares flat copper wire outstanding, and the mechanical characteristic of submarine cable can fully be guaranteed in the galvanized steel wire armor, and the copper wire armor is arranged in between the galvanized steel wire armor, promotes current carrying capacity, reduces the loss.

The above-described embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the spirit of the invention as set forth in the claims.

Claims

1. The utility model provides a wind power generation high voltage direct current submarine cable, includes cable core, inner liner, armor and outer protective layer, and cable core overcoat has inner liner, inner liner overcoat to have the armor, and the armor overcoat has outer protective layer, characterized by, the armor is formed outside the inner liner by galvanized steel wire and copper wire interval spiral winding, and the cross-section of galvanized steel wire is circular, and the copper wire is oval-shaped flat copper wire for the cross-section, and circular shape diameter is greater than oval-shaped minor axis diameter.

2. The wind power generation high voltage direct current submarine cable according to claim 1, wherein said cable core is a plurality of strands.

3. The wind power generation high-voltage direct-current submarine cable according to claim 2, wherein the cross section of the lining layer is circular, a plurality of round holes are formed in the lining layer, the inner diameter of each round hole is matched with the diameter of a cable core, and the lining layer integrally wraps a plurality of cable cores.

4. The wind power generation high-voltage direct current submarine cable according to claim 1, wherein a functional layer is arranged between the armor layer and the outer protective layer, and the functional layer is formed by spirally winding a plurality of strands of thin-film polyester tapes.

5. The wind power generation high voltage direct current submarine cable according to claim 1, wherein an electrolyte barrier film is adhered to the galvanized steel wires and the copper wires.

6. The wind power generation high-voltage direct current submarine cable according to claim 1, wherein the outer protective layer and the inner liner layer are polyethylene layers.

7. The wind power generation high-voltage direct current submarine cable according to claim 1, wherein the cable core comprises a conductor, an inner semiconductor layer, an insulating layer, an outer semiconductor layer, a metal sheath and a sheath, and the conductor, the inner semiconductor layer, the insulating layer, the outer semiconductor layer, the metal sheath and the sheath are sequentially sheathed and coated.