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Online monitoring system for hydrogen in power transformer oil based on thin film technology

A technology of power transformer and thin-film technology, which is applied to the online monitoring system of hydrogen in power transformer oil and the field of online monitoring of the health status of oil-immersed power transformers in power grids. It can solve the problems of high cost and large volume, and achieve good stability and sensitivity. High, overcome the effect of large volume

Inactive Publication Date: 2015-12-02
48TH RES INST OF CHINA ELECTRONICS TECH GROUP CORP
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Problems solved by technology

Among them, an oil-gas separation device must be used, and the oil-gas separation device has the disadvantages of large volume and high cost.

Method used

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  • Online monitoring system for hydrogen in power transformer oil based on thin film technology
  • Online monitoring system for hydrogen in power transformer oil based on thin film technology

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Embodiment Construction

[0025] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0026] Such as figure 1 and figure 2 Shown, the hydrogen on-line monitoring system in the power transformer oil based on film technology of the present invention comprises:

[0027] The hydrogen-sensitive chip 10 includes a hydrogen-sensitive element, which is a hydrogen-sensitive sensor based on a Pd-Cr film; that is, a Pd-Cr film is used as a hydrogen-sensitive material, and when Pd absorbs hydrogen, hydrogen molecules are catalyzed by Pd. It is decomposed into hydrogen atoms, and the hydrogen atoms then form Pd-H bonds with Pd, thereby causing changes in the resistance (or capacitance) of Pd; and then converting it into changes in electrical signals through circuits, so the hydrogen concentration on the surface of the hydrogen-sensitive chip 10 can be adjusted Changes are ultimately manifested in the form of electrical signals. ...

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Abstract

The invention discloses an online monitoring system for hydrogen in power transformer oil based on a thin film technology. The online monitoring system comprises a hydrogen sensitive chip and a control assembly, wherein the hydrogen sensitive chip comprises a hydrogen sensitive element; the hydrogen sensitive element is a hydrogen sensitive sensor based on a Pd-Cr thin film; and the control assembly is used for converting physical property variation of the hydrogen sensitive chip in a measuring range into a signal to be output. The online monitoring system disclosed by the invention has the advantages of simple structure, low cost, high sensitivity, good stability and the like.

Description

technical field [0001] The invention mainly relates to the field of on-line monitoring equipment for power systems, in particular to an on-line monitoring system for hydrogen in power transformer oil based on thin-film technology, which is mainly suitable for on-line monitoring of the health status of oil-immersed power transformers in power grids. Background technique [0002] With the improvement of the grid voltage level and the increase of transmission capacity, the requirements for the reliability of the power system are getting higher and higher. The transformer is the main equipment in the power system. When it fails, it will have a great impact on the safe operation of the power grid. Therefore, the online monitoring of the transformer status is particularly important. [0003] When local overheating, partial discharge or arc discharge occurs in an oil-immersed transformer, the transformer oil and insulating materials will be decomposed to produce various gases and d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/12G01N27/22
Inventor 刘又清景涛谢贵久曹勇全陈浩金忠
Owner 48TH RES INST OF CHINA ELECTRONICS TECH GROUP CORP
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