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Transformer oil-paper insulation test platform considering long-term AC and DC and positive and negative pressure

A technology of transformer oil and test platform, applied in the direction of testing dielectric strength, instruments, measuring electricity, etc., can solve problems such as inability to isolate air, deviation, and inability to prevent moisture intrusion.

Inactive Publication Date: 2020-10-23
SOUTHWEST JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing testing device still has the following insurmountable technical problems: the device for measuring the partial discharge process cannot be isolated from the air, so it cannot prevent the intrusion of water during the experiment, resulting in a certain degree of deviation in the experimental results

Method used

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  • Transformer oil-paper insulation test platform considering long-term AC and DC and positive and negative pressure

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Effect test

Embodiment 1

[0040] figure 1 It shows a transformer oil-paper insulation test platform considering long-term AC and DC and positive and negative pressures. The oil filling and discharging valve 10 is arranged on the steel pipe at the bottom of the main oil tank 1, and the front and back of the main oil tank 1 are provided with transparent circles for observing the inside of the main oil tank. Plate 8, the left side of the main fuel tank 1 is provided with a DC bushing 2 for applying DC voltage in the DC experiment and grounded in the AC experiment along the horizontal direction, and the right side of the main fuel tank 1 is provided with a DC bushing 2 along the horizontal direction for the AC experiment. AC voltage is applied in the test, and the AC bushing 9 is grounded in the DC experiment. During the experiment, the entire fuel tank is placed on a special shelf to keep the top of the bushing at a sufficient distance from the ground potential. Above the top of the main oil tank, there i...

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Abstract

A transformer oil-paper insulation test platform considering long-term AC and DC and positive and negative pressures. The main oil tank is equipped with an AC and DC bushing, and the oil conservator is located above the main oil tank. Lan, the structure of the oil conservator is: the cylinder is provided with a piston pad which is used to isolate oil and air and can move in the cylinder, and the middle and lower part of the cylinder is provided with an air valve for vacuuming, and the piston pad moves in the cylinder at the lowest point. The position is slightly higher than or equal to the position of the exhaust valve. The bottom of the cylinder of the oil conservator communicates with the main fuel tank through the connecting pipe. into the heater; the top of the oil pillow is equipped with a pressure valve, a vacuum gauge and a pressure gauge. This platform can completely prevent the intrusion of external moisture during the experiment, and can test the insulation performance of transformer oil paper under the conditions of positive and negative pressure, temperature, and AC and DC voltage levels.

Description

technical field [0001] The invention relates to a transformer oil paper insulation experiment device, in particular to an experiment device for testing the insulation performance of transformer oil paper under the conditions of long-term alternating current and direct current, positive and negative pressure and temperature. Background technique [0002] There are many experimental devices for oil-paper insulation, but they often focus on one aspect, and the functions are not perfect. There are also devices that integrate several aspects, for example: a platform that integrates thermoelectric aging and mechanical vibration. The existing testing device still has the following insurmountable technical problems: the device for measuring the partial discharge process cannot be isolated from the air, so it cannot prevent the intrusion of water during the experiment, resulting in a certain degree of deviation in the experimental results. Contents of the invention [0003] The pu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/12
CPCG01R31/1281
Inventor 胡广才吴广宁杨雁高波刘凯于瑞周芃刘成庄鑫
Owner SOUTHWEST JIAOTONG UNIV
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