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High voltage direct current cable insulation material

A cable insulation, high-voltage DC technology, applied in insulators, organic insulators, plastic/resin/wax insulators, etc., can solve the problems of material electric field distortion, cable insulation failure, insulation material failure, etc., to improve the initial voltage and eliminate space. Electric charge, the effect of preventing the formation of space charges

Inactive Publication Date: 2014-03-26
WUXI JIANGNAN CABLE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Several studies have confirmed that the space charge in XLPE is the main cause of early insulation failure of cables
Space charges are injected into the dielectric, causing distortion of the electric field inside the material, and eventually lead to breakdown of the material and failure of the insulating material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Polyethylene 100 parts;

[0025] 2 copies of CPE;

[0026] BaTiO 3 1.5 copies;

[0027] 1.5 parts of conductive potassium titanate whiskers;

[0028] 2.5 parts of dicumyl peroxide;

[0029] Antioxidant 300 0.5 parts.

Embodiment 2

[0031] Polyethylene 100 parts;

[0032] 1 copy of CPE;

[0033] BaTiO 3 0.5 copies;

[0034] 0.6 parts of conductive potassium titanate whiskers;

[0035] Diformyl peroxide 1 part;

[0036] Antioxidant BBM 0.1 parts.

Embodiment 3

[0038] Polyethylene 100 parts;

[0039] 1.5 copies of CPE;

[0040] BaTiO 3 1.2 copies;

[0041] 0.8 parts of conductive potassium titanate whiskers;

[0042] 1.5 parts of di-tert-butyl peroxide;

[0043] Antioxidant 1076 0.2 parts.

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Abstract

The invention provides a high voltage direct current cable insulation material, which comprises the following components in parts by weight: 100 parts of LDPE (Low-density Polyethylene), 1-2 parts of CPE (Chlorinated Polyethylene), 0.5-1.5 parts of BaTiO3, 0.6-1.5 parts of conductive potassium titanate whisker, 1-2.5 parts of a cross-linking agent, and 0.1-0.5 part of an antioxygen. A semiconductive polyolefin shielding material prepared from the high voltage direct current cable insulation material has the advantages of ultra-smooth surface feature, good physical property and excellent overall performance; electric current is effectively output to form a favorable uniform electric field, and partial discharge or insulation breakdown caused by severe electric field concentration due to surface defects of a semiconductive shielding layer is prevented; ionized charge and injected charge are absorbed in a deep trap, so that charge accumulating in a local area is avoided, space charge accumulation in a cable insulation material is restrained, and electrical conductivity of the cable insulation material is reduced.

Description

technical field [0001] The invention relates to the field of cable materials, in particular to a high-voltage DC cable insulation material. Background technique [0002] With the continuous expansion of the power system, the continuous increase of transmission power, and the gradual increase of transmission distance, AC transmission encounters some technical difficulties. DC transmission is one of the directions to solve technical difficulties in power transmission. Compared with AC transmission, DC transmission has the advantages of high transmission efficiency, small line loss, convenient adjustment of current and change of power transmission direction, low investment cost, and the length is not limited by capacitive current. The advantages of short-circuit current between the power grid and corona radio interference are small. A number of studies have confirmed that the space charge in XLPE is the main cause of early insulation failure of cables. Space charges are i...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08L23/28C08K13/06C08K9/04C08K9/02C08K7/08C08K3/24C08K5/14H01B3/44
CPCC08L23/06C08K2201/001C08L2203/202C08L2207/066H01B3/441
Inventor 陈晓军马壮刘军夏亚芳李昆昌韩俊杰
Owner WUXI JIANGNAN CABLE
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