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Method for improving insulation matching of high-voltage direct-current cable accessories based on nano-doping

A technology of high-voltage direct current and cable accessories, applied in the direction of organic insulators, rubber insulators, etc., to achieve the effects of low cost, suppression of charge accumulation, and simple process

Inactive Publication Date: 2018-01-12
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] So far, there are few research reports on the effective regulation of the interfacial charge characteristics of the composite insulation of DC cable accessories by means of nanoparticle doping

Method used

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  • Method for improving insulation matching of high-voltage direct-current cable accessories based on nano-doping
  • Method for improving insulation matching of high-voltage direct-current cable accessories based on nano-doping
  • Method for improving insulation matching of high-voltage direct-current cable accessories based on nano-doping

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Embodiment Construction

[0021] The technical solution adopted by the present invention to solve its technical problems is:

[0022] 1. The ethylene-propylene rubber nanocomposite insulating material is prepared by melt-opening and hot-pressing molding. The open-rolling blending method can ensure that fillers, cross-linking agents and other additives are fully mixed in EPDM monomer; hot-pressing molding process can effectively Control the vulcanization temperature and thickness of the rubber sample, as well as the flatness of the surface. The specific preparation process of EPDM composite materials is as follows:

[0023] (1) Put the EPDM colloidal particles and filler in an oven at 60°C for 12 hours to remove the moisture in the particles.

[0024] (2) Preheat the rollers of the double-roll mill, keep the temperature of the rollers at about 160°C, and adjust the distance between the double rollers to a minimum of 2mm.

[0025] (3) Put EPDM between the double sticks and preheat for 10 minutes to ful...

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Abstract

The invention relates to a high-voltage direct-current (DC) cable insulation technology, and aims to provide a technical scheme for improving overall performance of a composite insulation system of cable accessories. The technical scheme adopted in the invention is that a method for improving insulation matching of high-voltage direct-current cable accessories based on nano-doping comprises the following steps: physically blending an EPDM insulation material of a DC cable accessory with nano-CB by a nano-doping technology; hot-forming; using an interfacial effect of nano-particles to reduce acarrier mobility of composite materials, thereby improving a matching degree of a composite insulation system. The method provided by the invention is mainly applied to high-voltage DC cable insulation designing occasions.

Description

technical field [0001] The invention relates to a high-voltage direct current cable insulation technology, in particular to a method for improving the insulation matching of high-voltage direct current cable accessories based on nano-doping. Background technique [0002] As the laying distance of HVDC cables continues to increase, the demand for cable accessories is also expanding. Prefabricated accessories have been widely used in land HVDC XLPE cable lines already in operation in various countries. The cable joint is composed of inner shielding layer, accessory main insulation, stress cone, outer shielding layer and outer sheath, etc. The structure is relatively complicated, but it has the advantages of short installation time and stable performance. Power cable accessories are multi-layer solid dielectric composite insulation structures. Compared with traditional AC cable accessories, the electrical and mechanical problems inside DC cable accessories are more prominent. ...

Claims

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Application Information

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IPC IPC(8): C08L23/16C08K3/04H01B3/28
Inventor 李进杜伯学梁虎成
Owner TIANJIN UNIV