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Evaluation method on transformer oil
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A transformer oil and evaluation method technology, applied in the direction of material inspection products, etc., can solve problems such as methods that cannot provide transformer oil and transformer oil anti-oxidation performance, and achieve good technical effects
Active Publication Date: 2012-03-21
CHINA PETROLEUM & CHEM CORP
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Problems solved by technology
[0004] The technical problem to be solved by the present invention is that the existing technology cannot provide a method for evaluating the anti-oxidation performance of transformer oil that meets the actual application environment of transformer oil, and a new evaluation method for transformer oil is provided
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Embodiment 1
[0018] Set a bare and loaded transformer in the transformer oil A1, so that the transformer oil is in full contact with the transformer; among them, the test conditions of the transformer oil are: temperature 85 ℃, oxygen flow rate 25 ml / min, voltage 6000 volts; the test conditions of the transformer For: primary voltage 300 volts, secondary voltage 200 volts, load current 2.5 amps.
[0019] Test the acid value of the test transformer oil. When the acid value is 0.1 mg KOH / g, record the test time as 2720 hours, and use this time to evaluate the oxidation resistance of the test transformer oil.
Embodiment 2
[0021] Same as [Example 1], evaluate the antioxidant performance of A1 oil sample. Only the test conditions for transformer oil are: temperature 98°C, oxygen flow rate 40 ml / min, voltage 9000 volts; test conditions for transformers are: primary voltage 380 volts, secondary voltage 250 volts, load current 5 amps.
[0022] Test the acid value of the test transformer oil. When the acid value is 0.1 mg KOH / g, record the test time as 1560 hours, and use this time to evaluate the oxidation resistance of the test transformer oil.
Embodiment 3～8
[0024] Same as [Example 1], evaluate the antioxidant properties of A1, A2, A3, B, D and C oil samples. Only the test conditions for transformer oil are: temperature 95°C, oxygen flow rate 40 ml / min, voltage 8100 volts; test conditions for transformers are: primary voltage 330 volts, secondary voltage 220 volts, load current 4.5 amps.
[0025] Test the acid value of the test transformer oil, when the acid value is 0.1 mg KOH / g, record the test time. See Table 2 for details.
[0026] Table 2
[0027] oil sample
[0028] It can be seen from Table 2 that according to the test time, the order of evaluating the performance of the test oil samples is: A3, A2, D, A1, B, C. The test evaluation results are completely consistent with the performance analysis and actual application of the test samples. That is: A2, A3 oil samples are Class I, transformer oils with good performance; A1, B, D oil samples are Class II transformer oils with good performance, and C oil samples are...
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Abstract
The invention relates to an evaluation method on transformer oil, mainly solving the problem that the existing technology can not provide an evaluation method which conforms to practical application environment of transformer oil on antioxidation performance of transformer oil. The invention arranges an exposed and loaded transformer in the transformer such that the transformer oil and the transformer can fully contact with each other, wherein the test conditions of the transformer oil are as follows: the temperature is 60-200 degrees centigrade; the oxygen flow is 20-100 ml / min; the voltage is 1, 000-20, 000 V; the test conditions of the transformer are as follows: the primary voltage is 200-500 V; the secondary voltage is 100-400 V; the load current is 1-10 A. The technical solution of the invention well solves the problem, and can be used in evaluation of antioxidation performance of transformer oil.
Description
technical field [0001] The invention relates to an evaluation method of transformer oil. Background technique [0002] Transformer oil is one of the basic materials used in power transmission systems. It mainly plays the role of insulation and cooling in oil-filled electrical equipment such as transformers, reactors, transformers, and switches. Due to the influence of oxygen, temperature, electric field, metal, insulating materials and other factors in the process of power transmission and transformation of electrical equipment, the transformer oil will undergo chemical reactions such as oxidation and cracking to generate a large amount of peroxides and alcohols, aldehydes, ketones, Acid and other oxides, and then generate insoluble matter such as oil sludge through condensation reaction, resulting in deterioration of oil quality and reduced service life. Therefore, the anti-oxidation performance of transformer oil is an important quality index of transformer oil. [0003]...
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Application Information
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