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A test device for transformer oil-paper insulation combined with electric heating and aging

A technology for transformer oil and aging experiments, applied in the field of transformers, can solve problems such as low reliability and inconvenient operation, and achieve the effects of simple operation, convenient operation process, and isothermal relaxation current detection.

Active Publication Date: 2017-02-15
SHANGHAI MUNICIPAL ELECTRIC POWER CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a transformer oil-paper insulation electric heating combined aging test device, which can realize various state detection and fault diagnosis of the transformer, and can be directly taken out of the sealed cavity after the aging test without opening the sealed cavity. The oil sample and gas, the operation is more convenient, the reliability of the experimental analysis results is high, and the operation is simple and convenient, which is used to solve the problems of low reliability of the experimental analysis results and inconvenient operation of the existing electrothermal aging experimental device

Method used

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  • A test device for transformer oil-paper insulation combined with electric heating and aging

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Embodiment 1

[0042] Such as figure 1 As shown, the experimental device of the present invention includes a sealed cavity, a test device, a heating device, a partial discharge detection device, an oil inlet and an air inlet.

[0043] The sealed cavity includes a metal upper cover plate 1 and a metal lower shielding shell 2, the metal lower shielding shell 2 is an open box structure, the metal upper cover plate 1 is installed at the opening of the metal lower shielding shell, the metal upper cover plate 1 and the metal lower shielding shell The interface of the metal lower shielding shell 2 is provided with positioning grooves that cooperate with each other to prevent sliding. The metal upper cover plate 1 is equipped with a BNC connector 3 for leading out the low-voltage electrode 8 , a high-voltage flange 5 for leading out the high-voltage electrode 6 , and a heating penetrating piece 13 for fixing the heating device.

[0044] The test device is located in the sealed cavity and fixed with...

Embodiment 2

[0050] This embodiment is provided with an oil delivery pipeline 22 and an electric pump 23 on the basis of the first embodiment, the electric pump 23 is arranged on the oil delivery pipeline 22, and the oil inlet 18 is a pipeline arranged on the metal lower shielding shell 2 port, the oil intake port 18 communicates with the metal lower shielding shell 2 through the pipeline where it is located, one end of the oil delivery pipeline 22 communicates with the metal lower shielding shell 2, and the other end of the oil delivery pipeline 22 is arranged at the place where the oil intake port is located. On the pipeline, it is connected with the oil intake port 18 and the metal lower shielding shell 2. An oil intake control valve 17 is arranged on the pipeline where the oil intake port 18 is located. The oil intake control valve 17 is a three-way valve. Through the oil intake control valve 17 Control the passage of the oil pipeline 22 .

[0051] At the beginning of the experiment, t...

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Abstract

The invention relates to a transformer oil-paper insulation electricity-heating unite ageing test device which comprises a sealing cavity and a test device body located in the sealing cavity. The test device body of the transformer oil-paper insulation electricity-heating unite ageing test device comprises a high voltage electrode, a low voltage electrode and an insulation paper sample, the insulation paper sample of the test device body is located between the high voltage electrode and the low voltage electrode, and electric ageing conditions of an oil-paper insulation test are controlled by controlling the voltage exerted to the insulation paper sample; the transformer oil-paper insulation electricity-heating unite ageing test device further comprises a heating device, and heat aging conditions of the oil-paper insulation test are controlled by controlling the heating temperature of the heating device; the transformer oil-paper insulation electricity-heating unite ageing test device further comprises a partial discharge detecting device, and high-frequency partial discharge detecting and low-frequency partial discharge detecting are achieved. By means of the transformer oil-paper insulation electricity-heating unite ageing test device, multi-state detection and fault diagnosis of a transformer can be achieved, an oil sample and gas in the sealing cavity after the aging test are directly taken out under the condition that the sealing cavity is not opened, the reliability of experimental analysis results is high, and the device is easy and convenient to operate, and the problem that an existing test device is low in reliability of the experimental analysis results and inconvenient to operate is solved.

Description

technical field [0001] The invention relates to the technical field of transformers, in particular to transformer oil paper, in particular to a transformer oil paper insulation electric heating combined aging experiment device. Background technique [0002] Power transformers, especially large oil-immersed power transformers, are one of the most important equipment in power systems. Their operational reliability is directly related to the safety and stability of power systems. Statistics show that transformer operating accidents are mainly caused by faults in their insulation systems. , The operating life of the transformer depends largely on the aging state of the oil-paper insulation system. Therefore, accurately diagnosing the aging state of the oil-paper insulation system is crucial to predicting the life of the transformer, and it is also the premise and basis for realizing the condition maintenance of the transformer. [0003] In most transformers, the insulation syst...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/00
Inventor 吴剑敏黄华陈超杰李淑琦吴建东尹毅
Owner SHANGHAI MUNICIPAL ELECTRIC POWER CO
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