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Evaluation method on antioxidation performance of transformer oil

A technology of anti-oxidation performance and transformer oil, applied in the direction of instruments, scientific instruments, measuring devices, etc., can solve the problem of not being able to provide the anti-oxidation performance of transformer oil and transformer oil, and achieve the effect of good technical effect

Active Publication Date: 2013-10-30
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] 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 is in line with the actual application environment of transformer oil. Through special performance parameters, the transformer operates with load under certain test conditions, so as to Simulate the application environment of oxygen, temperature, electric field, metal and insulating materials in the actual work of transformer oil, and provide a new evaluation method for the anti-oxidation performance of transformer oil

Method used

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  • Evaluation method on antioxidation performance of transformer oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 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.

[0027] The winding parameters of the transformer are: inductance L1: 2.12 henries, inductance L2: 0.67 hens; resistance R1: 2.62 ohms, resistance R2: 1.45 ohms; no-load current: 250 mA; total power consumption: 90 watts; insulation resistance: 500 megohms.

[0028] The performance parameters of the transformer are: no-load loss: 9 watts; no-load current: 120 mA; short-circuit loss (75°C): 72 watts; impedance drop (75°C): 35 volts; rated temperature rise of winding coils: 65℃; Rated temperature rise of iron core surface: 55℃.

[0029] Test the acid value of the test transformer oil. When the aci...

Embodiment 2

[0031] 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 98 ℃, oxygen flow rate 40 ml / min, voltage 9000 volts; the test conditions of the transformer For: primary voltage 380 volts, secondary voltage 250 volts, load current 5 amps.

[0032] The winding parameters of the transformer are: inductance L1: 1.98 henries, inductance L2: 0.71 hens; resistance R1: 2.63 ohms, resistance R2: 1.46 ohms; no-load current: 250 mA; total power consumption: 90 watts; insulation resistance: 600 megohms.

[0033] The performance parameters of the transformer are: no-load loss: 9 watts; no-load current: 120 mA; short-circuit loss (75°C): 72 watts; impedance drop (75°C): 35 volts; rated temperature rise of winding coils: 65℃; Rated temperature rise of iron core surface: 55℃.

[0034] Test the acid value and interfacial tension of the test transfo...

Embodiment 3

[0036] 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.

[0037] The winding parameters of the transformer are: inductance L1: 2.01 henries, inductance L2: 0.69 hens; resistance R1: 2.63 ohms, resistance R2: 1.46 ohms; no-load current: 250 mA; total power consumption: 90 watts; insulation resistance: 500 megohms.

[0038] The performance parameters of the transformer are: no-load loss: 9 watts; no-load current: 120 mA; short-circuit loss (75°C): 72 watts; impedance drop (75°C): 35 volts; rated temperature rise of winding coils: 65℃; Rated temperature rise of iron core surface: 55℃.

[0039] Test the acid value of the test transformer oil, when the acid value is 0.1mgKOH / g, record the test time. See Ta...

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Abstract

The invention relates to an evaluation method on antioxidation performance of 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 winding parameters of the transformer are as follows: inductance L1 is 1-4 henry and inductance L2 is 0.5-2 henry; the resistance R1 is 1-5 ohm and the resistance R2 is 0.5-5 ohm; the no-load current is 50-500 mA; the total power consumption is 50-120 watt; the insulating resistance is 20-1, 000 megohm; the performance parameters of the transformer are as follows: the no-load loss is 5-20 watt; the no-load current is 50-500 mA; the short circuit loss (75 degrees centigrade) is 10-100 watt; the impedance voltage drop (75 degrees centigrade) is 10-50 V; the rated temperature rise of the winding coil is 10-80 degrees centigrade; the rated temperature rise of the surface of the iron core is 10-80 degrees centigrade. 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 a method for evaluating the anti-oxidation performance 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 i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/00
Inventor 俞巧珍傅继瑜吕文继濮尚斌赵吉余
Owner CHINA PETROLEUM & CHEM CORP