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Detection circuit and system used for discharge of bubbles in transformer oil

A transformer oil and detection circuit technology, applied in the direction of testing dielectric strength, etc., can solve the problem that the offline detection method cannot be compared with the online detection method

Inactive Publication Date: 2015-04-29
STATE GRID CORP OF CHINA +3
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  • Claims
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Problems solved by technology

[0006] The main purpose of the present invention is to provide a detection circuit and system for bubble discharge in transformer oil, to solve the problem that the offline detection method cannot be compared with the online detection method in the related art,

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  • Detection circuit and system used for discharge of bubbles in transformer oil
  • Detection circuit and system used for discharge of bubbles in transformer oil
  • Detection circuit and system used for discharge of bubbles in transformer oil

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Embodiment Construction

[0023] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0024] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiment of the application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the application. Obviously, the described embodiment is only It is an embodiment of a part of the application, but not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0025] It should be noted that the terms "comprising" and "having...

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Abstract

The invention discloses a detection circuit and system used for discharge of bubbles in transformer oil. The detection circuit for the discharge of the bubbles in the transformer oil comprises an off-line detection branch, an on-line detection branch and a power supply, wherein the off-line detection branch is connected with a to-be-detected transformer, and used for detecting off-line discharge of the bubbles in the transformer oil of the to-be-detected transformer in an off-line state; the on-line detection branch is connected with the to-be-detected transformer, and used for detecting on-line discharge of the bubbles in the transformer oil of the to-be-detected transformer in an on-line state; and the power supply is connected with the to-be-detected transformer, and used for serving as a working power supply of the to-be-detected transformer in the on-line state. According to the detection circuit and the system, the problem that an off-line detection effect and an on-line detection effect cannot be compared in a correlation technique is solved.

Description

technical field [0001] The invention relates to the field of power systems, in particular to a detection circuit and system for bubble discharge in transformer oil. Background technique [0002] When the transformer oil contains bubbles, in the unit volume of the transformer insulation, the electric field distribution is inversely proportional to the dielectric constant of the insulating medium, and the dielectric constant of the bubbles is less than 1 / 2 of the oil dielectric constant, so the electric field intensity in the bubbles is less than 1 / 2 of the oil dielectric constant. It is more than twice as high in oil, and the electric field strength of air bubbles is much lower than that of oil-paper insulation, so that air bubbles are particularly prone to partial discharge. Partial discharge plays an erosive effect on the insulating structure. During partial discharge, the oil is decomposed due to electrolysis and the Schottky radiation effect of the electrode, and the orig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12
Inventor 刘弘景石磊张琛桂媛于彤方烈
Owner STATE GRID CORP OF CHINA
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