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Semi-conductive shield material used for high-voltage direct-current cable and preparation method thereof

A high-voltage direct current, semi-conductive technology, applied in the field of cable materials, can solve the problems of less shielding materials for high-voltage direct current, cannot meet the production needs of high-voltage direct current cables, and space charge accumulation, etc., to achieve ultra-smooth interface, good heat resistance, The effect of reducing the amount of filler used

Active Publication Date: 2015-12-09
GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the existing technology, the production process of shielding materials below 35kV is relatively mature, but there are few domestic and foreign reports on shielding materials for high-voltage direct current, especially there is no domestic report on shielding materials for high-voltage direct current, and the production of shielding materials at home and abroad is still unable to meet Production requirements of HVDC cables
At present, medium and low voltage shielding materials are mixed with DC and AC, so high voltage DC shielding materials not only need to solve the problem of ultra-clean environment in the production process, to achieve ultra-smooth contact between the shielding material and the insulating surface, but also need to solve the problem of a large number of local problems in the insulation. state, and the particularly serious problem of space charge accumulation in DC transmission

Method used

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  • Semi-conductive shield material used for high-voltage direct-current cable and preparation method thereof
  • Semi-conductive shield material used for high-voltage direct-current cable and preparation method thereof
  • Semi-conductive shield material used for high-voltage direct-current cable and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0037] A semi-conductive shielding material for high-voltage DC cables, according to mass, comprising:

[0038] Base resin: 700g

[0039] Superconducting carbon black: 300g

[0040] Space charge inhibitor: 15g

[0041] Antioxidant: 10g

[0042] Lubricant: 20g

[0043] Cross-linking agent: 20g

[0044] Coupling agent: 5g

[0045] The melt index of the base resin is 4g / 10min, the mass content of acrylate is 27%, and the density is 0.926g / cm 3 ethylene-butyl acrylate copolymer.

[0046] The superconducting carbon black selected particle size is 15-20nm, specific surface area is 355m 2 / g, superconducting carbon black with an oil absorption of 480-510mL / 100g. .

[0047] The antioxidant used was Antioxidant 1010.

[0048] The lubricant used was silicone oil with a viscosity of 500.

[0049] The space charge inhibitors used are zeolites.

[0050] The crosslinking agent used was dicumyl peroxide (DCP).

[0051] The coupling agent used is KH550 silane coupling agent.

[0...

Embodiment 2

[0063] A semi-conductive shielding material for high-voltage DC cables, according to mass, comprising:

[0064] Base resin: 800g

[0065] Superconducting carbon black: 200g

[0066] Space charge inhibitor: 15g

[0067] Antioxidant: 10g

[0068] Lubricant: 20g

[0069] Cross-linking agent: 20g

[0070] Coupling agent: 5g

[0071] The melt index of the base resin is 4g / 10min, the mass content of acrylate is 27%, and the density is 0.926g / cm 3 ethylene-butyl acrylate copolymer.

[0072] The superconducting carbon black selected particle size is 15-20nm, specific surface area is 355m 2 / g, superconducting carbon black with an oil absorption of 480-510mL / 100g. .

[0073] The antioxidant used was Antioxidant 1010.

[0074] The lubricant used was silicone oil with a viscosity of 500.

[0075] The space charge inhibitors used are zeolites.

[0076] The crosslinking agent used was dicumyl peroxide (DCP).

[0077] The coupling agent used is KH550 silane coupling agent.

[...

Embodiment 3

[0090] A semi-conductive shielding material for high-voltage DC cables, comprising 60 parts of matrix resin, 40 parts of superconducting carbon black, 0.5 parts of space charge inhibitor, 2 parts of antioxidant, 2 parts of Lubricant, 0.5 part of crosslinking agent, 0.2 part of coupling agent, matrix resin is ethylene-ethyl acrylate copolymer.

[0091] The preparation method of the above-mentioned semi-conductive shielding material for high-voltage DC cables comprises the following steps:

[0092] 1) Weighing: In terms of parts by mass, weigh 60 parts of matrix resin, 40 parts of superconducting carbon black, 0.5 parts of space charge inhibitor, 2 parts of antioxidant, 2 parts of lubricant, 0.5 parts Cross-linking agent, 0.2 parts of coupling agent; matrix resin is ethylene-ethyl acrylate copolymer.

[0093] 2) Mixing to make a space charge suppression masterbatch: divide the coupling agent into two parts, the first part is 5% of the total mass of the coupling agent; first, mi...

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Abstract

The invention discloses a semi-conductive shield material used for a high-voltage direct-current cable and a preparation method thereof. With ethylene-ethyl acrylate polymers or ethylene-butyl acrylate polymers being matrix resin, superconducting carbon black is added into the matrix resin to serve as conducting filler, antioxidant, lubricating agents and dispersing agents are added, after mixing, granulating, cooling and drying are performed, cross-linking agents are added into granules for adsorption and permeation, and finally the granule-shaped semi-conductive shield material used for the high-voltage direct-current cable is obtained through air drying. The finished product shield material is particularly suitable for producing the high-voltage direct-current cable, can completely meet the requirements for performance of direct-current shield materials used for high-voltage direct current and has good space charge control performance.

Description

technical field [0001] The invention relates to the technical field of cable materials, in particular to a semiconductive shielding material for high-voltage DC cables and a preparation method thereof. Background technique [0002] The semi-conductive shielding material is the material used to produce the semi-conductive shielding layer in the cable. The semi-conductive shielding layer is a layer of semi-conductive material that is closely combined with the insulating layer in the cable, so that the insulation in the cable is closely combined with other layers, eliminating The air gap, the role of the protective insulation layer being destroyed, in the HVDC power transmission cable, the semi-conductive shielding layer also plays a vital role in the control of the space charge. If the contact interface between the semiconductive shielding layer and the insulation is not smooth, or contains a lot of impurities, it will lead to serious space charge injection. Due to the accumu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08L83/04C08K13/06C08K9/06C08K3/04C08K5/134C08K3/34C08K5/14C08J3/22
CPCC08J3/226C08J2323/08C08J2423/08C08K2201/005C08K2201/006C08L23/0869C08L2203/20C08L83/04C08K13/06C08K9/06C08K3/04C08K5/1345C08K3/34C08K5/14C08L91/00C08K9/04
Inventor 于涛李文鹏曹均正慕坵林徐曼张伟
Owner GLOBAL ENERGY INTERCONNECTION RES INST CO LTD
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