Method for measuring content of free carbon in transformer oil

A technology of transformer oil and measurement method, which is applied in instruments, measuring devices, scientific instruments, etc., can solve the problems of transformer failure and failure to test the free carbon content in transformer oil, etc.

Pending Publication Date: 2021-06-08
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

There should be no free carbon in normal transformer oil. If there is free carbon, it means that there is a fault inside the transformer. An internal inspection of the transformer should be carried out. However, there is still no detection method for testing the free carbon content in transformer oil.

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  • Method for measuring content of free carbon in transformer oil

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Embodiment Construction

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0021] refer to figure 1 as shown, figure 1 It is a schematic diagram of the measurement data of the embodiment of the present invention.

[0022] A method for measuring free carbon content in transformer oil, comprising the following steps:

[0023] S10. Collect an oil sample from the oil product, and the oil product needs to be shaken evenly during sampling;

[0024] S20. Add the first specified volume of petroleum ether or n-hexane, and mix thoroughly. The fi...

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Abstract

The invention discloses a method for determining the content of free carbon in transformer oil, which is characterized by comprising the following steps: S10, collecting an oil sample from an oil product; S20, adding petroleum ether or normal hexane with a first specified volume, and fully mixing; S30, filtering the mixed solution obtained in the step S20 by using a filter membrane; S40, taking down the filter membrane and airing; S50, taking petroleum ether or n-hexane with a second specified volume from the container, placing the air-dried filter membrane in the container, and performing ultrasonic separation by using an ultrasonic cleaner; S60, taking out the filter membrane, evaporating the solution to dryness, and weighing the mass; and S70, calculating the carbon content. Compared with the prior art, the petroleum ether is used for diluting the transformer oil, and the viscosity of the mixed and diluted hydraulic oil is greatly reduced, so that the problems that the transformer oil is thick and is not easy to be subjected to suction filtration and the like are solved; the free carbon can be effectively intercepted by using the 0.22 mu m organic phase filter membrane, the effect of separating the free carbon is finally realized, and the content of the free carbon can be measured through simple calculation.

Description

technical field [0001] The invention relates to the technical field of measuring free carbon, in particular to a method for measuring free carbon content in transformer oil. Background technique [0002] Transformer oil is a kind of mineral oil obtained through distillation and refining from natural petroleum. It is a pure and stable liquid natural hydrocarbon with low viscosity, good insulation and good cooling performance obtained by refining the lubricating oil fraction in petroleum with acid and alkali. Compound mixture. Commonly known as square shed oil, light yellow transparent liquid. There should be no free carbon in normal transformer oil. If there is free carbon, it means that there is a fault inside the transformer, and an internal inspection of the transformer should be carried out. However, there is still no detection method for testing the free carbon content in transformer oil. Contents of the invention [0003] The purpose of the embodiments of the presen...

Claims

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Application Information

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IPC IPC(8): G01N5/02G01N1/40
CPCG01N5/02G01N1/4077G01N2001/4088
Inventor 张丽
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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