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Test method of oxidation stability of transformer oil

A technology for oxidation stability and transformer oil, applied in color/spectral characteristic measurement, instruments, measuring devices, etc., which can solve problems such as long test time, serious accidents, and complex determination of sediment and acid value

Inactive Publication Date: 2012-06-20
STATE GRID HUNAN ELECTRIC POWER CO LTD ELECTRIC POWER SCI RES INST +1
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Problems solved by technology

During the use of transformer oil, it will inevitably oxidize and generate acidic substances and sludge, which will reduce the insulation and thermal conductivity of the overall equipment
In this way, it will have adverse effects on the safe operation of the transformer, and may even cause serious accidents. Therefore, oxidation stability is an important service condition and quality requirement for transformer oil. The oxidation degree of oil and the safe operation of transformers with transformer oil as insulating medium are very important
At present, the measurement of the oxidation stability of transformer oil is generally carried out by the method stipulated in the petrochemical industry standard SH / T 0206-1992 of the People's Republic of China "Determination of Oxidation Stability of Transformer Oil". To characterize the sediment and acid value of oil products, but this method takes a long time to test, requiring as much as 164 hours of high temperature oxidation, and the determination of sediment and acid value is also more complicated

Method used

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  • Test method of oxidation stability of transformer oil
  • Test method of oxidation stability of transformer oil
  • Test method of oxidation stability of transformer oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] (1) Using the spectrophotometric measurement method stipulated in the first part of the National Standard GB / T 7602.1-2008 "Determination of T501 Antioxidant Content in Transformer Oil and Turbine Oil" to measure the antioxidant contained in the entrusted transformer oil sample The mass percent concentration;

[0014] (2) Take 20g of entrusted transformer oil samples and place them at an ambient temperature of 100°C, add filamentous red copper as a catalyst, and add oxygen at the same time, and carry out an accelerated oxidation test for 2 hours. The mass ratio of the catalyst red copper to the entrusted transformer oil samples is in order is 0.1:100, and the flow rate of the oxygen is 10ml·min -1 ;

[0015] (3), use the measuring method that above-mentioned step (1) uses to measure the mass percentage concentration of antioxidant in the entrusted transformer oil sample that above-mentioned step (2) obtains through accelerated oxidation test;

[0016] (4) According to...

Embodiment 2

[0020] (1) Use the infrared spectroscopy measurement method specified in the third part of the national standard GB / T 7602.3-2008 "Determination of T501 Antioxidant Content in Transformer Oil and Turbine Oil" to measure the anti-oxidant contained in the entrusted transformer oil sample. The mass percentage concentration of oxidizing agent;

[0021] (2), take 30g of entrusted transformer oil samples and place them at an ambient temperature of 199°C, add powdery red copper as a catalyst, add oxygen at the same time, and carry out an accelerated oxidation test for 2 hours, the mass ratio of the catalyst red copper to the entrusted transformer oil samples is in order 100:100, the flow rate of the oxygen is 1000ml·min -1 ;

[0022] Steps (3)-(4) are the same as in Example 1.

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Abstract

The invention discloses a test method of oxidation stability of transformer oil, comprising the following steps of: (1) measuring the mass percentage concentration of antioxidant in the transformer oil by use of the national standards; (2) preparing an oil sample and standing at 100-199 DEG C, adding red copper and oxygen for the accelerated oxidation test; (3) measuring the mass percentage concentration of the antioxidant in the oil sample obtained in step (2); and (4) calculating the consumption rate of the antioxidant in the oil sample with a computational formula and characterizing the oxidation stability of the transformer oil according to a value of the consumption rate. According to the method, the oxidation stability of the transformer oil can be characterized by the consumption rate of the antioxidant obtained through the accelerated oxidation test, and the consumption rates of the antioxidant measured in the same accelerated oxidation test conditions with regard to different transformer oil samples can be used for comparatively evaluating the oxidation safeties of different transformer oil samples.

Description

technical field [0001] The invention relates to a method for testing the properties of oil products, in particular to a method for testing the oxidation stability of transformer oil. Background technique [0002] Transformer oil is an important insulating medium for transformers. During the use of transformer oil, it will inevitably oxidize and generate acidic substances and sludge, which will reduce the insulation and thermal conductivity of the overall equipment. In this way, it will have adverse effects on the safe operation of the transformer, and may even cause serious accidents. Therefore, oxidation stability is an important service condition and quality requirement for transformer oil. The degree of oxidation of the oil and the safe operation of the transformer with transformer oil as the insulating medium are very important. At present, the measurement of the oxidation stability of transformer oil is generally carried out by the method stipulated in the petrochemic...

Claims

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Application Information

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IPC IPC(8): G01N21/31G01N21/35G01N30/02G01N21/3577
Inventor 周舟冯兵胡旭万涛龚尚昆常燕
Owner STATE GRID HUNAN ELECTRIC POWER CO LTD ELECTRIC POWER SCI RES INST
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