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Device and method for monitoring moisture content of insulating paper during transformer storage and transportation

A technology for insulating paper and transformers, which is applied in the field of devices for monitoring the moisture content of insulating paper during transformer storage and transportation, and can solve the problems of many detection items, damage to oil-immersed insulating paper, and indirect judgment errors, etc.

Active Publication Date: 2017-05-17
EXAMING & EXPERIMENTAL CENT OF ULTRAHIGH VOLTAGE POWER TRANSMISSION COMPANY CHINA SOUTHEN POWER GRID
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many testing items, and there are certain errors in the indirect judgment, and the sampling test is carried out directly from the oil-immersed insulating paper inside the power transformer. Existing technology needs to be further improved

Method used

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  • Device and method for monitoring moisture content of insulating paper during transformer storage and transportation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Please refer to figure 1 As shown, a device for monitoring the moisture content of insulating paper during transformer storage and transportation includes a T-shaped tube 6 made of hollow steel pipe and a sample tank 5 connected to one end of the T-shaped tube 6, and the T-shaped tube 6 is opposite to One end of the sample tank 5 is provided with a first port 1 for communicating with a power transformer, and the other end of the T-shaped tube 6 is provided with a second port 7 for communicating with a vacuum pump. 6 is provided with a first valve 2, a second valve 3 is provided on a T-shaped tube 6 close to the second port 7, and a barometer 4 is provided on the T-shaped tube 6 close to the sample tank 5, and the sample tank 5 It includes a tank body and a movable cover plate, the movable cover plate and the tank body are detachably connected by fastening screws and sealing rings, and the sample tank 5 is also provided with a mesh support for placing oil-immersed insula...

Embodiment 2

[0034] On the basis of Example 1, in order to monitor the moisture content of the oil-immersed insulating paper in the power transformer in different time periods, several devices of the present invention can be used in parallel through multi-fork interfaces. Every time the specified monitoring time is reached, just remove one of the devices to detect the moisture content of the oil-immersed insulating paper sample in it.

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Abstract

The invention discloses a device for monitoring moisture content of insulating paper during transformer storage and transportation. The device comprises a T-tube and a sample tank connected to one end of the T-tube, wherein a first port for being communicated with a power transformer is formed in one end, opposite to the sample tank, of the T-tube, a second port for being communicated with a vacuum pump is formed in the other end of the T-tube, a first valve is arranged on the T-tube close to the first port, and a second valve is arranged on the T-tube close to the second port; a barometer is arranged on the T-tube close to the sample tank, and a mesh support is arranged in the sample tank. The invention further discloses a method for monitoring the moisture content of the insulating paper during transformer storage and transportation. According to the device and the method for monitoring the moisture content of the insulating paper during transformer storage and transportation, an oil-immersed insulating paper sample having the same moisture content with the power transformer can be directly obtained, and direct basis for monitoring whether insulation gets damp during inflation, storage and transportation before the power transformer is put into operation is provided.

Description

technical field [0001] The invention relates to the field of on-line monitoring and fault diagnosis of electric power equipment, in particular to a device and method for monitoring the moisture content of insulating paper during storage and transportation of transformers. Background technique [0002] With the development of my country's economy, the capacity of the power grid is increasing, and more and more power transformers (ordinary AC transformers and converter transformers) are put into operation. As the key equipment of the power grid, the safety and reliability of the power transformer directly affect the safety and stability of the power system. Oil-immersed power transformers all use oil-paper insulation structure, and moisture will greatly reduce the insulation performance of the oil-paper insulation structure and even cause insulation failure, which will cause the transformer to malfunction. [0003] At present, the monitoring and maintenance of power transform...

Claims

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Application Information

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IPC IPC(8): G01N33/00
CPCG01N33/00G01N33/0077
Inventor 伍衡梁晨李旭东王友元邓军周海滨
Owner EXAMING & EXPERIMENTAL CENT OF ULTRAHIGH VOLTAGE POWER TRANSMISSION COMPANY CHINA SOUTHEN POWER GRID
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