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a power cable

A technology of power cables and conductors, applied to power cables with shielding layers/conductive layers, etc., can solve problems such as theoretical analysis of XLPE power cable failure causes

Active Publication Date: 2018-07-20
江苏赛特电气有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the lack of understanding of the aging process and breakdown mechanism of the XLPE power cable insulation body, the existing domestic research level cannot conduct in-depth theoretical analysis of the fault causes of XLPE power cables, and this research is still blank. Therefore, it is urgent to carry out Research work on how to prolong the service life of cables and reduce the failure rate of cable bodies

Method used

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Examples

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Effect test

Embodiment 1

[0028] Example 1: Graphene is prepared, the mass ratio of nano-alumina is 20:7, 2g of graphene, 0.7g of nano-alumina. 18ml concentrated H 2 SO 4 , 8ml concentrated H 3 PO 4 , 20ml hydrogen peroxide solution, 100ml chloroform solution, 20g polyethylene, 300ml xylene.

[0029] Step 1, according to 9:4 18ml concentrated H 2 SO 4 and 8ml concentrated H 3 PO 4 , join in the there-necked flask that 2g graphene is housed;

[0030] Step 2, then add 20ml of hydrogen peroxide, and magnetic stirring at room temperature for 2h;

[0031] Step 3, then raise the temperature to 50°C, and magnetically stir for 3 hours under ultrasonic vibration treatment;

[0032] Step 4, then cooling to room temperature, adding 0.7g of nano-alumina, and magnetically stirring for 2 hours in an ice-water bath;

[0033] Step 5. After the ice-water bath treatment, perform centrifugation to remove the upper liquid, then repeatedly wash 5-6 times under hydrochloric acid and deionized water, and dry at 110...

Embodiment 2

[0039] Example 2: Graphene is prepared, the mass ratio of nano-alumina is 20:7.5, 2g of graphene, 0.75g of nano-alumina. 18ml concentrated H 2 SO 4 , 8ml concentrated H 3 PO 4 , 20ml hydrogen peroxide solution, 100ml chloroform solution, 20g polyethylene, 300ml dimethylbenzene, operating procedure is the same with embodiment 1.

Embodiment 3

[0040] Example 3: Graphene is prepared, the mass ratio of nano-alumina is 20:8, 2g of graphene, 0.8g of nano-alumina. 18ml concentrated H 2 SO 4 , 8ml concentrated H 3 PO 4 , 20ml hydrogen peroxide solution, 100ml chloroform solution, 20g polyethylene, 300ml dimethylbenzene, operating procedure is the same with embodiment 1.

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Abstract

The invention discloses a power cable. The power cable comprises conductors, wherein the outside of each conductor is coated with a conductor shielding layer; the outside of each conductor shielding layer is coated with an insulating rubber layer; a wrapping layer is arranged outside the insulating rubber layers; a rubber protection layer is arranged outside the wrapping layer; and each conductor shielding layer is prepared from a nanometer composite graphene shielding material. The prepared power cable has quite high breakdown fault resistance.

Description

technical field [0001] The invention relates to a power cable and belongs to the field of material synthesis. Background technique [0002] Cross-linked polyethylene (XLPE) power cables have been used in domestic power grids since the late 1980s, and were widely used in the early 1990s. In the initial stage of its operation, the operating failure rate was not high, but after more than ten years of operation, the operating failure rate of a large number of XLPE power cable lines put into operation at that time has increased significantly in recent years. 35KV and below XLPE power cables due to external factors such as external force damage, moisture migration and chemical corrosion, etc., form water dendrites and early aging, resulting in the number of XLPE power cable line breakdown faults accounting for more than 90% of the total number of power cable faults . Due to the lack of understanding of the aging process and breakdown mechanism of the XLPE power cable insulation ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B9/02
CPCH01B9/02
Inventor 张名运
Owner 江苏赛特电气有限公司
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