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Method for testing transformer on-load tap changer

A technology for transformers and switches, applied in the field of transformers, can solve the problems affecting the accuracy, poor stability, contact interference, etc. of the transition waveform test of the on-load switch, and achieve the effects of improving the acquisition effect, high stability, and improving accuracy.

Active Publication Date: 2017-06-13
BAODING TIANWEI GROUP TEBIAN ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

The existing method for testing the on-load switch has poor stability. When the switch operates, the contact will generate interference at the moment of contact, which will affect the accuracy of the transition waveform test of the on-load switch.

Method used

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  • Method for testing transformer on-load tap changer

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Embodiment Construction

[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0020] like figure 1 Shown, is an embodiment of the present invention,

[0021] A method for testing an on-load switch of a transformer, comprising a test circuit formed by connecting an on-load switch tester to a tested phase of the transformer on-load switch, characterized in that: the DC resistance tester is connected in parallel with the on-load switch tester, Use an external auxiliary DC source to reduce the error caused by interference during the test to improve the acquisition accuracy of the waveform. The specific steps are as follows:

[0022] 1) Check the oil sample index, and if the inspection is qualified, go to the next step;

[0023] 2) Use a DC resistance tester or an on-load switch tester to test the DC resistance of the on-load switch, and proceed to the next step if the DC resistance of the on-load switch is qualif...

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Abstract

The invention discloses a method for testing a transformer on-load tap changer, and relates to the technical field of power supply maintenance. An on-load tap changer tester is connected with a tested transformer on-load tap changer in a tested mode to form a test loop, a direct-current resistance tester is connected with the on-load tap changer tester in parallel, and an error brought by interference in the external auxiliary direct-current source reduction testing process is utilized for improving the waveform acquisition precision. By means of the method, the waveform acquisition effect is better, and on-load tap changer testing is more accurate.

Description

technical field [0001] The invention relates to the technical field of transformers, in particular to a method for testing an on-load switch of a transformer. Background technique [0002] The on-load switch is an important part of the transformer, and the field test of the on-load tap-changer plays a vital role in the safe operation of the transformer. The AC on-load switch test experiment is a must-do item in the power on-load high-voltage switch test, and its reliability directly determines whether the transformer can operate reliably. Therefore, during installation and maintenance, relevant experiments should be carried out to ensure that the on-load switch can operate safely for a long time. The existing method for testing the on-load switch has poor stability, and when the switch operates, the contact moment will cause interference, which will affect the accuracy of the transition waveform test of the on-load switch. Contents of the invention [0003] The technical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/327G01R27/02
CPCG01R27/02G01R31/327
Inventor 黄宝新陈建孙锋陈志国陈青田王函
Owner BAODING TIANWEI GROUP TEBIAN ELECTRIC
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