Polypropylene cable material under polarity inversion working condition, and preparation method and application of polypropylene cable material

A polarity reversal, polypropylene technology, applied in circuits, electrical components, plastic/resin/wax insulators, etc., can solve the problems of reduced breakdown strength of insulating materials, unfavorable long-term stable operation of high-voltage DC cables, etc., to reduce damage , less space charge accumulation, the effect of suppressing partial discharge
CN111423658AInactive Publication Date: 2020-07-17TIANJIN UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
TIANJIN UNIV
Publication Date
2020-07-17
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention discloses a polypropylene cable material under a polarity inversion working condition, and a preparation method and application of the polypropylene cable material. The polypropylene composite insulating cable material is prepared from the following components in percentage by mass: 99.5 to 99.7 % of a polypropylene matrix and 0.3 to 0.5 % of a thiobisphenol compound filler. On one hand, a hindered phenol unit in the thiobisphenol compound captures free radicals generated in the matrix through proton transfer, so formation of a low-density region in the polypropylene material isinhibited, and then occurrence of partial discharge is inhibited; on the other hand, multi-scale trap distribution is provided for the polypropylene matrix, so damage of collision ionization and high-energy charge movement to molecular chains is reduced, and therefore, breakdown strength is improved. The breakdown strength of the polypropylene thermoplastic cable insulating material prepared by the method is reduced slightly after polarity inversion, and the polypropylene thermoplastic cable insulating material still keeps good insulating property compared with pure isotactic polypropylene andis applicable to high-voltage direct-current cables.
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Description

technical field

[0001] The invention belongs to the technical field of electrical and electronic material preparation, and in particular relates to a polypropylene cable material under the polarity reversal working condition, a preparation method and an application thereof. Background technique

[0002] Polypropylene is an environmentally friendly high-voltage DC cable insulation material. Compared with traditional cross-linked polyethylene insulation materials, it has the advantages of high operating temperature, low electrical conductivity, high breakdown strength, and not easy to accumulate space charges. However, in conventional high-voltage direct current transmission, there is a working condition of voltage polarity reversal, which is unfavorable for the long-term stable operation of high-voltage direct current cables.

[0003] After the polarity is reversed, the external electric field and the space charge accumulated in the material before the polarity reversal will ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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