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Mixed modified nano particle transformer oil and preparation method thereof

A technology of transformer oil and nanoparticles, which is applied in the chemical and electrical fields, can solve the problems of less electrical performance, and achieve the effects of simple equipment, good insulation, thermal conductivity and stability improvement.

Active Publication Date: 2016-02-03
WUHAN NARI LIABILITY OF STATE GRID ELECTRIC POWER RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the research on nanofluids mainly focuses on the thermal conductivity enhancement mechanism and modeling of nanofluids, and there are relatively few studies on their electrical properties.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The invention provides a kind of mixed modified nano particle transformer oil and its preparation method, comprising the following steps:

[0022] (1) Preparation of modified nano-boron nitride transformer oil: disperse 0.1g of boron nitride nanoparticles in 250ml of isopropanol, and ultrasonicate the BN nano-particles of isopropanol mixture for 40 minutes with an ultrasonic cell pulverizer (on ice in a water bath), with an ultrasonic power of 300w; then gradient centrifugation of the mixed solution at a speed of 2000r / min and a centrifugation time of 40min to collect the supernatant; the supernatant was subjected to high-speed centrifugation at a speed of 8000r / min and a centrifugation time of 6min , discard the supernatant to obtain nano-BN with a smaller particle size, then vacuum-dry, prepare modified transformer oil according to the BN / transformer oil mass ratio of 1 / 10000, ultrasonically disperse, and then further disperse with strong electric mechanical stirring. ...

Embodiment 2

[0027] The invention provides a kind of mixed modified nano particle transformer oil and its preparation method, comprising the following steps:

[0028] (1) Preparation of modified nano-boron nitride transformer oil: disperse 0.1g of boron nitride nanoparticles in 250ml of isopropanol, and ultrasonicate the BN nano-particles of isopropanol mixture for 15 minutes with an ultrasonic cell pulverizer (on ice in a water bath), with an ultrasonic power of 450w; then gradient centrifugation of the mixed solution at a speed of 3000r / min and a centrifugation time of 25min to collect the supernatant; high-speed centrifugation of the supernatant at a speed of 10000r / min and a centrifugation time of 4min , discard the supernatant to obtain nano-BN with smaller particle size, then vacuum-dry, prepare modified transformer oil according to the BN / transformer oil mass ratio of 1 / 5000, ultrasonically disperse, and then use strong electric mechanical stirring for further dispersion treatment, ...

Embodiment 3

[0032] The invention provides a kind of mixed modified nano particle transformer oil and its preparation method, comprising the following steps:

[0033](1) Preparation of modified nano-boron nitride transformer oil: disperse 0.1g of boron nitride nanoparticles in 250ml of isopropanol, and ultrasonicate the BN nano-particles of isopropanol mixture for 30 minutes with an ultrasonic cell pulverizer (on ice in a water bath), with an ultrasonic power of 400w; then gradient centrifugation of the mixed solution at a speed of 2500r / min and a centrifugation time of 30min to collect the supernatant; high-speed centrifugation of the supernatant at a speed of 9000r / min and a centrifugation time of 5min , discard the supernatant to obtain nano-BN with smaller particle size, then vacuum-dry, prepare modified transformer oil according to the BN / transformer oil mass ratio of 1 / 50000, ultrasonically disperse, and then use strong electric mechanical stirring for further dispersion treatment, T...

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Abstract

The invention provides mixed modified nano particle transformer oil and a preparation method thereof. The mixed modified nano particle transformer oil is formed by mixing modified nano boron nitride transformer oil and modified nano silicon dioxide transformer oil. The volume ratio of the modified nano boron nitride transformer oil to the modified nano silicon dioxide transformer oil ranges from 1:5 to 1:1. The preparation method includes the three steps of preparation of the modified nano boron nitride transformer oil, preparation of the modified nano silicon dioxide transformer oil and mixing. The mixed modified nano particle transformer oil has good insulating and heat conductive performance and can meet the requirements for large-capacity, ultrahigh-voltage-grade and small power transformers, equipment which is used is simple and easy to operate, and large-scale production can be achieved.

Description

technical field [0001] The invention relates to the technical fields of chemistry and electricity, and in particular relates to a mixed modified nano particle transformer oil and a preparation method thereof. Background technique [0002] Statistical analysis of a large number of transformer faults shows that: insulation fault is the main reason affecting the normal operation of transformers. Most of the current large-scale power transformers are oil-immersed power transformers. The transformer oil plays the dual role of heat exchange transfer and electrical insulation. Therefore, the heat dissipation performance and insulation performance of the transformer oil play a decisive role in the safety and reliability of the long-term operation of the transformer. effect. First of all, with the continuous improvement of the voltage level in the power transmission process, the development direction of high electric field, large capacity and miniaturization of power transformers re...

Claims

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Application Information

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IPC IPC(8): C10M169/04C10M177/00C10N40/16
Inventor 周竹君金逸孔海洋关伟民
Owner WUHAN NARI LIABILITY OF STATE GRID ELECTRIC POWER RES INST
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