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Extra High Voltage DC Power Cable

A power cable and ultra-high voltage technology, applied in the field of ultra-high voltage DC power cables, can solve the problems of accumulated space charge and electric field distortion

Active Publication Date: 2021-12-07
LG CABLE LTD (KR)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, since the polyolefin resin has a linear molecular chain structure, the mechanical and thermal properties are improved through the cross-linking process and applied to the cable insulation layer, and due to the decomposition of the cross-linking agent during the cross-linking process, the Influence of cross-linking by-products of cross-linking, there is the problem of space charge accumulation in the cable insulation, whereby the space charge may distort the electric field in the (EHVDC cable insulation) Breakdown Voltage The voltage at which a breakdown of the insulation occurs

Method used

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manufacture example

[0074] As a cable including an inner semiconductive layer, an insulating layer, and an outer semiconductive layer, by adjusting the content of a crosslinking agent and the content of inorganic particles added to the insulating layer, and by adjusting crosslinking by-products by crosslinking and degassing Thus, the average value of each layer of the content of the cross-linked by-products of the cross-linked by-products of the inner layer, the middle layer and the outer layer that is divided into three equal parts by the thickness of the insulating layer is produced and adjusted as The cables of the embodiment and comparative example shown in Table 1. The content of the cross-linked by-products is measured by extracting a test piece at an arbitrary position in the middle of each layer.

[0075] 【Table 1】

[0076]

[0077]

[0078] Volume resistance evaluation

[0079] After extracting an insulation test piece with a thickness of about 170um from the insulation layer of ...

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Abstract

The invention relates to an ultra-high voltage direct current power cable. Specifically, the present invention relates to an ultra-high voltage direct current power cable capable of simultaneously preventing or minimizing electric field distortion caused by accumulation of space charge in an insulator and a decrease in high temperature volume resistance and direct current dielectric strength.

Description

technical field [0001] The invention relates to an ultra-high voltage direct current power cable. Specifically, the present invention relates to an ultra-high voltage direct current power cable (High Voltage) capable of simultaneously preventing or minimizing electric field distortion caused by accumulation of space charges in an insulator and a decrease in high temperature volume resistance and direct current dielectric strength. Voltage direct current powercable). Background technique [0002] In general, in large-scale power systems that require large-capacity and long-distance power transmission, it can be said that high-voltage power transmission that increases the power transmission voltage is essential from the viewpoint of reduction in power loss, problems with construction land, and increase in power transmission capacity. Less. [0003] Power transmission methods can be roughly divided into AC power transmission methods and DC power transmission methods, wherein ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B9/02H01B7/02H01B7/288H01B7/282H01B7/28H01B7/18H01B7/22H01B3/44C08J3/24C08L23/06C08L23/08C08K5/14
CPCC08J3/24C08J2323/06C08J2323/08C08K5/14H01B3/441H01B7/0275H01B7/183H01B7/1875H01B7/226H01B7/2806H01B7/2825H01B7/288H01B9/027C08K2003/222C08K2003/343C08K3/041H01B7/14H01B7/204H01B7/02C08K9/04H01B9/006H01B13/0036
Inventor 郑贤贞南振镐柳政锡梁艺瑟许星益
Owner LG CABLE LTD (KR)
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