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Surface modification method for improving electricity resistance property of cellulose insulation paper

A technology of surface modification and insulating paper, applied in the field of electrical resistance of insulating paper, which can solve the problems of aging insulation, failure of oil-paper insulation system, and electric field distortion of oil-paper combined insulation.

Inactive Publication Date: 2018-08-31
TIANJIN UNIV
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Problems solved by technology

[0002] The converter transformer and the converter valve are jointly used as the connecting hub of the AC and DC systems. The bushing on the valve side must not only bear the AC electric field, but also bear the effects of the DC, AC-DC composite, and polarity reversal electric fields, which is prone to insulation damage.
Under the action of an electric field, the accumulation of surface, interface and space charges will lead to the distortion of the electric field of the oil-paper composite insulation, causing problems such as aging and insulation failure of the oil-paper insulation system

Method used

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  • Surface modification method for improving electricity resistance property of cellulose insulation paper
  • Surface modification method for improving electricity resistance property of cellulose insulation paper
  • Surface modification method for improving electricity resistance property of cellulose insulation paper

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Embodiment Construction

[0027] The invention discloses a surface modification method for improving the electrical resistance of cellulose insulating paper. The molecular structure control device is used to fluorinate the purchased cellulose insulating paper. The specific steps are as follows:

[0028] (1) Cut the cellulose paper to a suitable size, then place it in a vacuum drying oven, and carry out vacuum drying treatment at 90 ° C and a vacuum degree of 50 Pa for 24 hours to remove the moisture contained in the insulating paper.

[0029] (2) After cooling the fully dried insulating paper sample to room temperature, place it in the reaction kettle and seal the reaction kettle. It should be noted that in order to ensure that the fluorine gas can fully react with the insulating paper during the reaction process, the sample in the reaction kettle should not be too much.

[0030] (3) Turn on the rotary vane vacuum pump to quickly extract the air in the reactor until the pointer of the pressure gauge on...

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Abstract

The invention discloses a surface modification method for improving the electricity resistance property of cellulose insulation paper. The method mainly comprises the steps that a sample is dried, vacuumizing is conducted, a reaction kettle is cleaned, fluorine and nitrogen mixed gas is injected, the molecular structure is modified, the reaction kettle is cleaned, after it is guaranteed that fluorine is completely discharged, the reaction kettle is opened, and the sample is taken out. Accordingly, by means of molecular structure control processing, the direct-current electricity resistance property of oil-impregnated cellulose insulation paper is improved to a certain extent.

Description

technical field [0001] The invention belongs to the field of electric resistance of insulating paper, in particular to a surface modification method for improving the electric resistance of cellulose insulating paper. Background technique [0002] The converter transformer and the converter valve act as the connecting hub of the AC and DC systems. The bushing on the valve side not only bears the AC electric field, but also bears the effects of the DC, AC-DC compound, and polarity reversal electric fields, which is prone to insulation damage. Under the action of an electric field, the accumulation of surface, interface and space charges will lead to the distortion of the electric field of the oil-paper composite insulation, causing problems such as aging and insulation failure of the oil-paper insulation system. Therefore, the charge control of oil-paper insulation is a scientific problem to be solved urgently, and it has practical engineering significance Contents of the i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H25/04D21H27/00
CPCD21H25/04D21H27/005
Inventor 杜伯学常蕊朱闻博姜金鹏李进
Owner TIANJIN UNIV
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