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Temperature characteristic analysis method for optical fiber composite submarine cable under overload operation

A submarine cable, temperature characteristics technology, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve the problem of the increase in the growth rate of submarine cables and the lack of intuitive and effective methods for research on the overload of three-core optical fiber composite submarine cables, Affecting the service life of the submarine cable and other issues, to achieve the effect of low cost

Inactive Publication Date: 2018-01-12
ZHOUSHAN ELECTRIC POWER SUPPLY COMPANY OF STATE GRID ZHEJIANG ELECTRIC POWER +2
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Problems solved by technology

However, due to the high cost of submarine cables and the difficulty in laying and maintenance, the growth rate of submarine cables is far from keeping up with the increase in power demand of islands, so the overload operation of submarine cables in submarine distribution networks often occurs
The long-term overload operation of the three-core submarine cable will accelerate the aging of the cross-linked polyethylene material, affect the service life of the submarine cable, and even cause thermal breakdown of the three-core submarine cable insulation, so the research on the overload operation of the submarine cable is very necessary
The research on the overload of submarine cables mainly focuses on single-core. With the increase of power demand and the reduction of cable corridors, three-core submarine cables are more and more widely used in submarine distribution networks. The study of submarine cable overload lacks an intuitive and effective method

Method used

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  • Temperature characteristic analysis method for optical fiber composite submarine cable under overload operation
  • Temperature characteristic analysis method for optical fiber composite submarine cable under overload operation
  • Temperature characteristic analysis method for optical fiber composite submarine cable under overload operation

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Embodiment Construction

[0041] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0042] Such as Figure 7 Shown, the present invention comprises the following steps:

[0043] 1) Finite element modeling of submarine cable:

[0044] 1) The geometric model is established. When modeling, the conductor shielding layer, XLPE insulating layer and insulating shielding layer are combined to form an insulating layer, and the anti-corrosion layer and PE sheath are combined to form an inner sheath; when establishing a submarine cable model, use a cylinder Instead of the twisted structure of the submarine cable; the submarine cable is deeply buried in the seabed soil, the soil layer of the seabed around the cable is set to be the same as the length of the cable, the cable is located in the center of the soil layer, and the side length of the soil layer is set to be the length of the cable 2 times the actual laying depth;

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Abstract

The invention discloses a temperature characteristic analysis method for an optical fiber composite submarine cable under overload operation, and relates to an analysis method for the optical fiber composite submarine cable. At present, effective and visual methods are in the absence by aiming at the research of the overload of a three-core optical fiber composite submarine cable. The method comprises the following steps of carrying out the finite element modeling and the finite element simulation of the submarine cable, carrying out steady state simulation analysis and carrying out overload simulation analysis. By use of the technical scheme, the three-dimensional model of the three-core optical fiber composite submarine cable is established, a finite element method is used for simulatingthe temperature change situations of the land section and the submarine section of the submarine cable during the overload, an entity experiment is replaced, and the purposes of being visual, low incost and high in efficiency can be achieved.

Description

technical field [0001] The invention relates to an analysis method for an optical fiber composite submarine cable, in particular to a method for analyzing the temperature characteristics of an optical fiber composite submarine cable operating under overload. Background technique [0002] my country has a long coastline and numerous islands. Submarine cables play a very important role in remote power supply, high-voltage power transmission and communication. In recent years, cross-linked polyethylene (XLPE) three-core optical fiber composite submarine cables have been widely used in submarine distribution networks. However, due to the high cost of submarine cables and the difficulty in laying and maintenance, the growth rate of submarine cables is far from keeping up with the increase in power demand of islands, so the overload operation of submarine cables in submarine distribution networks occurs from time to time. The long-term overload operation of the three-core submari...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 汪洋胡文侃周波达林晓波张健李世强
Owner ZHOUSHAN ELECTRIC POWER SUPPLY COMPANY OF STATE GRID ZHEJIANG ELECTRIC POWER
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