Composite of mineral insulating oil and modified nanoparticle powder as well as application and preparation method thereof

A mineral insulating oil and nano-powder technology, applied in insulators, organic liquid insulators, organic insulators, etc., can solve the problems of lack and increase the difficulty of transformer insulation design and manufacture, and achieve enhanced heat dissipation, good physical and chemical and dielectric properties. performance, the effect of improving the dielectric strength

Inactive Publication Date: 2011-01-19
CHONGQING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The lack of understanding of the aging and destruction characteristics of oil-paper composite insulation under the action of electromagnetic field and thermal stress, as well as the lack of relevant theoretical basis for the discharge mechanism of oil-paper insulation and the space charge effect of the medium, further increase the constraints of transformer insulation design and manufacture. difficulty

Method used

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  • Composite of mineral insulating oil and modified nanoparticle powder as well as application and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (1) Fe with a diameter of about 40nm 3 o 4 (Ferric oxide) nano-powder is surface-treated. In the treatment step, the quality of adding silane coupling agent KH550 is 2% of the nano-powder mass. Ultrasonic dispersion is carried out at 50°C in a water bath, while mechanical stirring is carried out. The reaction time 1.5 hours;

[0042] (2) The dehydrated and degassed mineral insulating oil and the surface-treated Fe 3 o 4 The nanometer powders are mixed together, and the quality of the nanometer powders is 0.1% of that of the mineral insulating oil.

[0043] (3) The mixed mixture is processed by ultrasonic oscillation, the ultrasonic frequency is 40kHz, and the power density is 18W / cm 2 , the temperature of ultrasonic oscillation is 50°C, and the oscillation time is 60min.

[0044] (4) Put the shaken mixture into a planetary ball mill, and use wet grinding method for processing, the rotation speed is 150r / min, and the processing time is 30min.

[0045] (5) Carry out...

Embodiment 2

[0047] (1) Surface treatment is performed on AlN (aluminum nitride) nanopowders with a diameter of about 100nm. In the treatment step, the mass of the silane coupling agent dropped is 4% of the mass of the nanopowders, and then the mixed solution is placed in a water bath at 60° C. Ultrasonic dispersion is carried out under the following conditions, and mechanical stirring is carried out simultaneously, and the reaction time is 2 hours;

[0048] (2) The mineral insulating oil that has been dewatered and degassed and the surface-treated AlN nano powder are mixed together, and the mass of the nano powder is 0.01% of the mass of the mineral insulating oil.

[0049] (3) The mixed mixture is processed by ultrasonic oscillation, the ultrasonic frequency is 40kHz, and the power density is 18W / cm 2 , the temperature of ultrasonic oscillation is 60°C, and the oscillation time is 30min.

[0050] (4) Add the shaken mixture into a planetary ball mill, and use a wet grinding method for pr...

Embodiment 3

[0053] (1) Al with a diameter of about 600nm 2 o 3 (Al2O3) nano-powder is subjected to surface treatment. In the treatment step, the mass of the silane coupling agent dropped is 10% of the mass of the nano-powder, and the mixed solution is ultrasonically dispersed in a water bath at 50° C., and the reaction time is 3 hours. Hour.

[0054] (2) The dehydrated and degassed mineral insulating oil and the surface-treated Al 2 o 3The nanometer powders are mixed together, and the quality of the nanometer powders is 0.5% of that of the mineral insulating oil.

[0055] (3) The mixed mixture is processed by ultrasonic oscillation, the ultrasonic frequency is 40kHz, and the power density is 18W / cm 2 , the temperature of ultrasonic oscillation is 50°C, and the oscillation time is 20min.

[0056] (4) Add the shaken mixture into a planetary ball mill, and use a wet grinding method for processing, with a rotation speed of 150 r / min and a processing time of 60 min.

[0057] (5) Carry ou...

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Abstract

The invention provides a composite of mineral insulating oil and modified nanometer powder as well as application and a preparation method thereof. The composite comprises mineral insulating oil and nanometer powder. The preparation method of the nanometer modified insulating oil comprises the following steps: carrying out surface treatment on the nanometer powder; mixing the dehydrated and degassed mineral insulating oil with the nanometer powder performed with surface treatment; carrying out ultrasonic oscillation on mixed insulating oil; and adding the oscillated mixture into a planetary ball mill, and processing by a wet milling process. The invention adds the nanoparticle powder into the mineral insulating oil to form nanometer liquid dielectric, improves the dielectric property of the insulating oil and can strengthen the cooling effect of a transformer winding coil; in addition, the nanometer powder is much smaller than impurity particles in the insulating oil, can form a stable sol system with a liquid medium and does not form a breakdownsmall bridge under the action of the external electric field so as to improve the dielectric strength of the insulating oil.

Description

technical field [0001] The invention relates to the technical field of insulating oil, in particular to a mineral oil compound, the application of the mineral oil compound in the preparation of insulating oil, and a preparation method of the mineral oil compound. Background technique [0002] Insulating oil is an important liquid insulating medium, which is widely used in electrical equipment such as transformers. The power transformer is one of the key equipment in the safe operation of the power grid. A serious accident of the transformer will not only cause its own damage, but also interrupt the power supply. The insulation breakdown caused by the deterioration of the insulation medium inside the transformer is often the main cause of the transformer failure. With the continuous improvement of transmission voltage levels, oil-paper composite insulation has become increasingly difficult to meet the strict requirements of high-voltage levels for large-capacity, miniaturize...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B3/20H01B19/00H01F27/32
Inventor 李剑廖瑞金杨丽君孙才新唐炬陈伟根杜林王有元张晓星
Owner CHONGQING UNIV
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