Preparation method of elastomer-based polypropylene insulating material with high partial discharge tolerance

Abstract

The invention relates to a preparation method of an elastomer-based polypropylene insulating material with high partial discharge tolerance, which is characterized in that by adding an octylene elastomer, the elasticity modulus of the polypropylene insulating material is reduced, the polypropylene insulating material is easy to deform under the bombardment of partial discharge high-energy particles, and the energy of charged particles is relieved; the partial discharge tolerance of polypropylene is improved; the added octylene elastomer has better ultraviolet radiation tolerance, and can relieve the associated ultraviolet radiation degradation phenomenon in the partial discharge process, so that the partial discharge tolerance of polypropylene is improved; the trap depth of the polypropylene insulating material added with the octylene ethylene elastomer is reduced, dissipation of charges accumulated on the surface of polypropylene is accelerated, the proportion of direct bombardment of charged particles on the surface of the polypropylene material is weakened, and then the partial discharge tolerance of polypropylene is improved.

Description

technical field [0001] The invention belongs to the field of research and development of cable insulation materials, and relates to a recyclable power cable main insulation polypropylene material, in particular to a preparation method of an elastomer-based polypropylene insulation material with high partial discharge tolerance. Background technique [0002] The development of EHV / UHV AC transmission systems has put forward higher requirements for the reliability of electrical equipment. As high-voltage cables are key power equipment in the transmission system, the design level of the main insulating material is related to the safe and reliable operation of power cables. Cross-linked polyethylene (XLPE) is widely used as the main insulation material of cables due to its excellent electrical and mechanical properties, but its low melting point, complex cross-linking process and easy doping with impurities are not recyclable. These deficiencies have accelerated the development o...

AI Technical Summary

Problems solved by technology

[0003] However, during the actual operation of the power cable, the electric field distortion caused by the defects inside the material will generate partial discharge, gradually erode the insulating material, cause irreversible damage, reduce the insulating performance of the polymer material, and seriously threaten the operation safety of the cable

[0004] At present, there are few reports on the partial discharge resistance of polypropylene insulating materials at home and abroad, and there is no relevant patent on improving its partial discharge resistance.

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