A method for determining free carbon content in transformer oil

By mixing the transformer oil with petroleum ether and performing centrifugation and ultrasonication, combined with the organic component splitting and combustion treatment of the thermogravimetric analyzer, the problem of insufficient efficiency and accuracy of the free carbon content determination in the transformer oil is solved, and efficient and accurate free carbon content determination is achieved.

CN115032112BActive Publication Date: 2025-03-25GUANGDONG POWER GRID CO LTD +1
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Patent Information

Application Number
CN202210644856.7
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-06-08
Publication Date
2025-03-25
Estimated Expiration
2042-06-08

AI Technical Summary

Technical Problem

The prior art is difficult to effectively improve the measurement efficiency and accuracy of the free carbon content in transformer oil.

Method used

By mixing the transformer oil with petroleum ether, centrifugation and sonication, the mixture was then transferred to a surface dish for air-drying and drying, a solid powder substance was obtained, and the organic component splitting and combustion treatment was performed using a thermogravimetric analyzer, and the difference was calculated to determine the free carbon content.

Benefits of technology

It improves the measurement efficiency and accuracy of the free carbon content in the transformer oil, and the measurement process is simple and convenient to operate.

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Abstract

The invention discloses a method for determining the free carbon content of transformer oil. The method comprises the following steps: centrifuging a first mixed liquid obtained from transformer oil and petroleum ether to obtain a second mixed liquid; adding petroleum ether to the second mixed liquid to obtain a third mixed liquid; subjecting the third mixed liquid to ultrasonic, air-dried and oven-dried treatments to obtain a first solid powder substance and a first weight thereof; subjecting the first solid powder substance to organic component cracking treatment to obtain a second solid powder substance and a second weight thereof; subjecting the second solid powder substance to combustion treatment to obtain a third solid powder substance and a third weight thereof; calculating a first difference between the second weight and the third weight, taking the first difference as the weight value of free carbon in transformer oil, and calculating the content of free carbon based on a first preset volume of transformer oil. Compared with the prior art, the invention can improve the efficiency and accuracy of determining the free carbon content in transformer oil.
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