Heat conduction transformer oil and preparation method thereof

Abstract

The invention discloses heat conduction transformer oil, which is prepared from basic oil and 0.001 to 20 weight percent of modified aluminum alloy nano particles, wherein the particle size of the modified aluminum alloy nano particles is 1 to 500 nm; each modified aluminum alloy nano particle is obtained by forming a layer of metal oxide and an inorganic salt protective layer on the surface of anano aluminum alloy through chemical reaction; the aluminum alloy at least contains 50 weight percent of aluminum, preferably more than 70 weight percent of aluminum. The aluminum alloy further includes one or more of Ti, Mn and Cr. The heat conduction performance of the heat conduction transformer oil is obviously improved, and adverse effects caused by the adding of nano metals on the electric insulation performance of the transformer oil are avoided; the heat conduction transformer oil is high in heat conduction performance, insulation performance and stability.

Description

technical field [0001] The invention belongs to the technical field of transformer oil, and in particular relates to a heat-conducting transformer oil and a preparation method thereof. Background technique [0002] With the rapid development of the power grid system, the voltage level and transmission capacity continue to increase, which not only makes the volume and weight of power equipment continue to increase, but also reduces the safety and reliability of the equipment. According to the survey, from 2005 to 2010, power grid outage accidents caused by power transmission and transformation equipment failures in my country accounted for 37% to 48% of the total accidents in that year, ranking first in the cause of failure. As a relatively mature insulation technology, oil-paper insulation is widely used in power equipment. However, with the increase of service life, under the action of multiple physical fields such as electricity, magnetism, and machinery, the oil-paper ins...

AI Technical Summary

Problems solved by technology

[0005] At present, it is common in the prior art to use semiconductor and metal oxide insulating materials as nano-additives in transformer oil, but the thermal conductivity of such semiconductor and metal oxide insulating materials is limited, and generally can only improve the thermal conductivity of transformer oil. More than 10%, it is difficult to further improve the thermal conductivity of transformer oil