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High-voltage DC cable insulating material and a preparation method thereof

A technology of cable insulation and high-voltage direct current, which is applied in the direction of organic insulators, plastic/resin/wax insulators, etc., and can solve the problems that the suppression effect is not obvious

Inactive Publication Date: 2009-06-03
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Adding an appropriate amount of maleic anhydride to polyethylene can effectively inhibit the movement of cations inside the insulation, and then inhibit their accumulation to form space charge packets. However, the inhibitory effect of maleic anhydride on anions with smaller molecular radii is not obvious.

Method used

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  • High-voltage DC cable insulating material and a preparation method thereof
  • High-voltage DC cable insulating material and a preparation method thereof
  • High-voltage DC cable insulating material and a preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Put 50 grams of low-density polyethylene, 0.05 grams of antioxidant 1010, 2.5 grams of aluminum oxide, and 0.5 grams of maleic anhydride into a Haake torque rheometer for mixing. The mixing temperature is 375K and the mixing time is After 10 minutes, 1.15 grams of dicumyl peroxide was put into a Huck torque rheometer and kneaded for 10 minutes. The kneading temperature was kept at 375K to obtain an insulating material that can be used for high-voltage plastic cables.

Embodiment 2

[0022] Put 50 grams of low-density polyethylene, 0.05 grams of antioxidant 1010, 1 gram of magnesium oxide, and 0.1 gram of maleic anhydride into a Haake torque rheometer and knead at a temperature of 378K for 15 minutes , and then put 1.15 grams of dicumyl peroxide into the Haake torque rheometer and knead for 15 minutes, and the kneading temperature was kept at 378K to obtain an insulating material that can be used for high-voltage plastic cables.

Embodiment 3

[0024] Put 50 grams of low-density polyethylene, 0.05 grams of antioxidant 1010, 0.25 grams of silicon oxide, and 2.5 grams of maleic anhydride into a Haake torque rheometer and knead at a temperature of 373K for 13 minutes , and then put 0.5 g of dicumyl peroxide into the Haake torque rheometer and kneaded for 13 minutes, and the kneading temperature was kept at 373K to obtain an insulating material that can be used for high-voltage plastic cables.

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Abstract

The invention relates to high-voltage DC cable insulating material and a preparation method thereof in the technical field of the insulating material. The preparation method is that: 100 weight portions of low-density polyethylene, 0.1-1 weight portion of anti-oxidizer, 0.5-5 weight portions of nano inorganic powder and 0.2-5 weight portions of maleic anhydride are placed into and mixed and compounded in a banbury mixer; the temperature of mixing and compounding is 373K to 378K and the mixing and compounding time is 10 to 15 minutes; 0.1-5 weight portions of cross-linking agent is added into the mixture and is mixed and compounded under the temperature of 373K to 378K for 10 to 15 minutes; then, the high-voltage DC cable insulating material is obtained; wherein, the density of the low-density polyethylene is less than 0.9g / cm<3>. The insulating material of the preparation method can effectively improve the mechanical and electric properties of the high-voltage DC cable, thus avoiding the disadvantage that the environment is polluted and damaged by an oilpaper insulating cable due to the leakage of the insulating oil.

Description

technical field [0001] The invention relates to the technical field of insulating materials and a preparation method thereof, in particular to a high-voltage DC cable insulating material and a preparation method thereof. Background technique [0002] Compared with AC transmission technology, DC transmission is gradually being used in power transmission and distribution due to its low line cost, small line loss, no system stability problems, short-circuit current limitation, fast adjustment, and reliable operation. . Because plastic DC power cables have the advantages of good mechanical properties, less running line loss, convenient installation, operation and maintenance, acid and alkali resistance, corrosion resistance, and no pollution to the environment, they have become a hot research topic at present. During the operation of the DC cable, there will be no periodic changes in the electric field as in the case of AC transmission, so the impurity particles in polyethylene...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08K13/02C08K3/22C08K3/36C08K5/09B29B7/28H01B3/44
Inventor 王雅群尹毅李旭光蔡川
Owner SHANGHAI JIAO TONG UNIV
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