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Novel high-voltage cable

A high-voltage cable, a new type of technology, applied in power cables, insulated cables, cables, etc., can solve the problems of lowering the cable operation level, limited improvement, and long industrialization period, avoiding the PTC effect, improving the voltage level, and reducing production. cost effect

Active Publication Date: 2021-06-11
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The inner semi-conductive shielding layer is used as the middle part connecting the metal core and the outer semi-conductive shielding layer, filling the gap between the two parts, but due to the existence of interface defects, discharges are prone to occur, thereby reducing the operating level of the cable
Improve the withstand breakdown field strength of the insulating layer by changing the material, but the improvement range is limited, and the industrialization period for mass production is long

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Such as figure 2 As shown, a high-voltage cable includes a wire core 1, an insulating layer 2 and an outer conductive shielding layer 3, and a nanoporous structure layer 5 is provided on the side of the insulating layer 2 close to the wire core 1, and the nanoholes 501 of the nanoporous structure layer 5 The extension direction is perpendicular to the cable extension direction. In this embodiment, the nanoporous structure layer 5 includes a layer of nanoporous structure.

Embodiment 2

[0046] Such as image 3 As shown, a high-voltage cable includes a wire core 1, an insulating layer 2 and an outer conductive shielding layer 3, and a nanoporous structure layer 5 is arranged on the side of the insulating layer 2 close to the wire core 1, and the nanoholes 501 of the nanoporous structure layer extend The direction is perpendicular to the cable extension direction, the axial direction of the nanohole 501 is approximately perpendicular to the surface of the core 1, and the nanoporous structure layer 5 includes three layers of nanoporous structures, namely the first nanoporous structure 51, the second nanoporous structure 52 and the second nanoporous structure. Three nanoporous structures 53 . The three-layer nanoporous structure is arranged sequentially along the axial direction of the nanopores 501 . In this embodiment, the number of layers of the nanoporous structure is three layers, but it can be understood that the application does not limit the number of la...

Embodiment 3

[0048] The structure of the high-voltage cable provided in this embodiment is the same as that in Embodiment 2, except that the medium contained in the nanopores 501 of the first nanoporous structure 51, the second nanoporous structure 52 and the third nanoporous structure 53 is mineral oil , the diameters of the nanopores 501 are inconsistent, and the maximum value of the diameter d1 of the nanopores 501 is 300 nm.

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Abstract

The invention provides a novel high-voltage cable which comprises a wire core and an insulating layer. A nano-pore structure layer is arranged in an area, close to the wire core, of the insulating layer, and the nano-pore extending direction of the nano-pore structure is perpendicular to the extending direction of the cable. According to the high-voltage cable provided by the invention, an inner semi-conductive shielding layer is not arranged, and the area, close to the wire core, of the insulating layer is provided with the nano-pore structure with the nano-scale pore diameter, so that discharge can be effectively prevented, the breakdown-resistant field strength of the cable is greatly improved, and the voltage grade of the cable is improved.

Description

technical field [0001] The application belongs to the technical field of high-voltage power transmission, and in particular relates to a novel high-voltage cable. Background technique [0002] The safe operation of XLPE high-voltage cables is crucial to the stability of the entire power system, but with the increase of voltage levels, the breakdown strength of cables needs to be improved urgently. Such as figure 1 As shown, in the prior art, the XLPE high-voltage cable structure is from the inside to the outside, followed by the core 1, the inner semi-conductive shielding layer 4, the insulating layer 2, and the outer semi-conductive shielding layer 3. The breakdown strength of the cable is largely determined by the insulating layer 2 and its matching with the inner semi-conductive shielding layer 4 . The inner semi-conductive shielding layer serves as the middle part connecting the metal core and the outer semi-conductive shielding layer, filling the gap between the two p...

Claims

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Application Information

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IPC IPC(8): H01B7/02H01B7/29H01B7/42H01B9/02
CPCH01B9/021H01B7/02H01B7/29H01B7/421
Inventor 魏艳慧李国倡李雪静王兆琛辛萌郝春成雷清泉
Owner QINGDAO UNIV OF SCI & TECH