Low-loss power cable and manufacturing method and application thereof

A technology for power cables and manufacturing methods, applied in the direction of power cables, cable/conductor manufacturing, power cables with shielding layers/conductive layers, etc., can solve the problem of high cable loss, achieve reduced power transmission loss, low resistance loss, and reduce The effect of resistance

Inactive Publication Date: 2021-02-05
NANJING INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At the same time, the invention provides a method for manufacturing a low-loss power cable, the cable manufactured by this method can solve the problem of high cable loss during long-distance transmission

Method used

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  • Low-loss power cable and manufacturing method and application thereof
  • Low-loss power cable and manufacturing method and application thereof
  • Low-loss power cable and manufacturing method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Such as figure 1 As shown, a low-loss power cable includes a conductor material layer 1, an XLPE insulating layer 2, a metal shielding layer 3, a wrapping inner lining layer 4 and a flame-retardant outer sheath layer 5 arranged sequentially from inside to outside.

[0045] Such as figure 2 As shown, the conductor material layer 1 is made of high-strength and low-loss conductor material wires twisted forward and backward.

[0046] The XLPE insulating layer 2 is made of microporous modified cross-linked polyethylene.

[0047] The wrapping inner liner 4 is made of modified polytetrafluoropropylene.

[0048] The metal shielding layer 3 is formed by winding Al-Si alloy flat strips.

[0049] The flame retardant outer sheath layer 5 is made of polytetrafluoropropylene.

[0050] A method for manufacturing a low-loss power cable, comprising the steps of:

[0051] S1. Use high-strength and low-loss conductor material wires to twist forward and reverse as the conductor materia...

Embodiment 2

[0075] The difference between this embodiment and embodiment 1 is only:

[0076] A method for manufacturing a low-loss power cable. In terms of mass percentage, the high-strength and low-loss conductor material wire includes the following raw materials: Ag: 3.77%; W: 4.3%; CuCe: 4.7%; CuCr: 9.6%; CuTi: 4.3% %; Cu: balance;

[0077] The preparation method of the high-strength and low-loss conductor material wire includes the following steps:

[0078] S1. Alloy smelting: According to the ratio of raw materials, mix Cu, Ag and CuCe master alloys and heat them to 1620°C for smelting. After they are fully melted, add CuCr, CuTi master alloys and simple substances at a mass ratio of 2:1:1 W, the temperature is raised to 2010°C for full melting until it is completely melted to obtain a smelted alloy liquid;

[0079] S2. Continuous casting and rolling: control the casting temperature at 1920°C and the casting speed at 4.8m / min, and cast the S1 smelted alloy liquid into alloy rods; t...

Embodiment 3

[0093] The difference between this embodiment and embodiment 1 is only:

[0094] A method for manufacturing a low-loss power cable. In terms of mass percentage, the high-strength and low-loss conductor material wire includes the following raw materials: Ag: 2.56%; W: 3.4%; CuCe: 4.5%; CuCr: 6.8%; CuTi: 3.4% %; Cu: balance;

[0095] The preparation method of the high-strength and low-loss conductor material wire includes the following steps:

[0096]S1. Alloy smelting: According to the ratio of raw materials, mix Cu, Ag and CuCe master alloys and heat them to 1600°C for smelting. After they are fully melted, add CuCr, CuTi master alloys and simple substances in a mass ratio of 2:1:1 W, the temperature is raised to 2000°C for full melting until it is completely melted to obtain a smelted alloy liquid;

[0097] S2. Continuous casting and rolling: control the casting temperature at 1900°C and the casting speed at 4.5m / min, and cast the S1 smelted alloy liquid into alloy rods; th...

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Abstract

The invention discloses a low-loss power cable. The low-loss power cable comprises a conductor material layer, an XLPE insulating layer, a metal shielding layer, a wrapping lining layer and a flame-retardant outer sheath layer which are sequentially arranged from inside to outside. The invention further discloses a manufacturing method of the low-loss power cable. The manufacturing method comprises the following steps: S1, forwardly and backwardly twisting high-strength low-loss conductor material wires to form a conductor material layer of the power cable; S2, pulling microporous modified cross-linked polyethylene out of the surface of the conductor material layer through extrusion equipment to serve as the XLPE insulating layer; S3, winding an Al-Si alloy ribbon outside the XLPE insulating layer as a metal shielding layer; and S4, extruding a layer of modified polytetrafluoropropene in the periphery of the metal shielding layer to serve as a wrapping lining layer. The invention alsodiscloses an application of the low-loss power cable in a high-speed railway cable and/or a submarine cable. The cable has the characteristics of low resistance loss, low dielectric loss, low sheath loss and the like.

Description

technical field [0001] The invention relates to a low-loss power cable and its manufacturing method and application, belonging to the technical field of power cables. Background technique [0002] The power cable will inevitably produce loss during operation, which will cause heat generation and increase the temperature of the cable. Therefore, the heat dissipation of the cable should be considered in the laying of the cable to ensure that the cable will not cause accelerated insulation aging due to overtemperature during operation, and the cable life will be shortened. Even the cable is destroyed immediately. Moreover, the factors affecting the cable temperature field are complex and changeable, and the current carrying capacity of the cable is also difficult to accurately determine. [0003] Especially for high-speed railway cables and submarine cables, due to their large-length manufacturing, long-distance and wide-spacing laying methods, and the inability of the metal s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B7/00H01B7/02H01B3/02H01B3/44H01B9/02H01B7/26H01B13/02H01B13/14H01B13/26C22C9/00C22C1/03C22F1/08
CPCC22C1/03C22C9/00C22F1/002C22F1/08H01B3/025H01B3/441H01B7/0009H01B7/02H01B7/26H01B9/021H01B9/023H01B13/02H01B13/148H01B13/26
Inventor 巨佳王章忠胡亮闫晨于皓刘欢李旋李华冠强新发吴萌刘敏敏陈慧敏
Owner NANJING INST OF TECH
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