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Method for testing content of corrosive sulphur in insulating oil

A technology of corrosive sulfur and insulating oil, applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of long time consumption, low efficiency, and inability to quantify the corrosion performance of oil products, etc., and achieve the effect of convenient operation and simple device

Active Publication Date: 2014-07-30
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned traditional qualitative methods generally have the defects of long time-consuming and low efficiency
For example, the judgment of the test results mainly depends on the intuitive judgment of the color, so it is impossible to give a quantitative description of the corrosion performance of the oil

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] (1) Take a commercially available QCM quartz crystal microbalance with a quartz crystal resonator plate and a sensor bracket, a commercially available TTL oscillator with a frequency counter, 0.05ml of insulating oil samples for entrusted 220kV transformers, and an air inlet pipe 1 commercially available DZF incubator with air outlet pipe and heater;

[0016] (2) Apply the insulating oil sample taken in step (1) on the quartz crystal resonator plate of the quartz crystal microbalance taken in step (1), then send the quartz crystal microbalance into the incubator set in step (1), and pass the described The quartz crystal resonator plate coated with the insulating oil sample used by the entrusted transformer is connected to the peripheral electrochemical quartz crystal microbalance test workstation;

[0017] (3) Opening step (2) Put the inlet pipe and outlet pipe of the thermostat of the quartz crystal resonator plate, input nitrogen into the thermostat through the inlet ...

Embodiment 2

[0024] (1) Take a commercially available QCM quartz crystal microbalance with a quartz crystal resonator plate and a sensor bracket, a commercially available TTL oscillator with a frequency counter, 5ml of insulating oil samples for entrusted 110kV transformers, an air inlet pipe and 1 set of DZF constant temperature box with air outlet pipe and heater;

[0025] Step (2) is with embodiment 1;

[0026] (3) Opening step (2) Insert the inlet pipe and outlet pipe of the thermostat box with the quartz crystal resonator plate, input nitrogen into the thermostat box at an input rate of 1 L per hour through the inlet pipe for 60 minutes, and then close the inlet pipe and outlet pipe;

[0027] Step (4) is with embodiment 1;

[0028] (5) Turn on the heater of the incubator set in step (1), control the temperature inside the incubator at 150°C, and keep the temperature for 10 hours;

[0029] Steps ⑹~⑻ are the same as in Example 1.

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Abstract

The invention discloses a method for testing content of corrosive sulphur in insulating oil. The method comprises the following steps: (1) taking an insulating oil sample used by an authorized transformer; (2) coating a quartz crystal resonance oscillation piece by using the insulating oil sample; (3) introducing nitrogen; (4) recording the frequency f1 of the quartz crystal resonance oscillation piece; (5) controlling the temperature to be between 90-150 DEG C and keeping for 0.5-10 hours; (6) recording the frequency f2 of the quartz crystal resonance oscillation piece; (7) calculating the frequency change delta f of the quartz crystal resonance oscillation piece; and (8) calculating the content of corrosive sulphur in the insulating oil used by the authorized transformer. By using the method, the content of corrosive sulphur in the oil of the transformer can be conveniently, accurately and quantitatively tested, and therefore, the device is easy and convenient to operate, and has the important guiding significance on judgment of incipient faults of transformers and development of state maintenance work of the transformers.

Description

technical field [0001] The invention relates to a method for detecting properties of oil products, in particular to a method for detecting corrosive sulfur content in insulating oil for transformers. Background technique [0002] The performance of insulating oil for transformers is directly related to the safe operation and service life of electrical equipment. The sulfide in the insulating oil for transformers can form cuprous sulfide on the insulating paper during the operation of the transformer, which will corrode the copper coil. This sulfide will first reduce the insulating performance of the insulating paper, causing the insulating paper of the transformer to be broken down, thereby causing the transformer to be damaged. Therefore, it is particularly necessary to strengthen the supervision and detection of corrosive sulfur in insulating oil. However, so far, the detection of corrosive sulfur in insulating oil still uses the traditional ASTM D (where "ASTM" is the a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N5/00
Inventor 周舟冯兵何铁祥万涛龚尚昆刘小玲
Owner STATE GRID CORP OF CHINA
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