Intelligent diagnosis apparatus for faults of power transformer based on graphene gas sensor array

A technology of gas sensor and power transformer, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of low correct rate of fault diagnosis, achieve fast response speed, good repeatability and stability, and simple and convenient preparation process Effect

Active Publication Date: 2016-11-09
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology

The transformer fault diagnosis method based on the analysis of dissolved gas in transformer oil mainly includes the traditional three-ratio method, but the fault diagnosis accuracy rate of the three-ratio method is relatively low

Method used

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  • Intelligent diagnosis apparatus for faults of power transformer based on graphene gas sensor array
  • Intelligent diagnosis apparatus for faults of power transformer based on graphene gas sensor array
  • Intelligent diagnosis apparatus for faults of power transformer based on graphene gas sensor array

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Embodiment Construction

[0032] The following embodiments will further illustrate the present invention in conjunction with the accompanying drawings.

[0033] see figure 1 , the embodiment of the present invention is used for the detection of dissolved gas in the insulating oil 3 of the power transformer 2. After being filtered by the oil-gas separation membrane 4, the gas enters the gas test chamber 9 through the gas valve 5, and is detected by the graphene-based gas sensor array The resistance change of 10 realizes the component and content detection of the dissolved gas in the transformer oil, adopts the deep trust network expert system 13 to judge the fault type of the power transformer according to the corresponding relationship between different gas types and concentrations and fault types, and displays it on the Labview terminal display module 14 Display the transformer running status and fault diagnosis results, and remotely transmit the transformer running status to the monitoring terminal b...

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Abstract

The invention discloses an intelligent diagnosis apparatus for faults of power transformer based on graphene gas sensor array. The apparatus comprises a transformer tank, an oil-gas separation film, a gas test chamber, a graphene-base gas sensor array, a data acquisition module, a computer, a depth confidence network expert system, a Labview terminal display module, a sound-light alarm module and a wireless communication module. The graphene-base gas sensor array is a six-unit gas sensor array, detection on compositions and content of a dissolved gas in transformer oil is realized by detecting the resistance variation of the graphene-base gas sensor array, and the depth correspondence network expert system is employed for determining the fault type of a power transformer based on the correspondence between different gas type and concentration and fault types. The apparatus is applicable to intelligently diagnose faults of power transformers and possesses characteristics of real-time monitoring, sound-light alarm and wireless remote transmission.

Description

technical field [0001] The invention relates to a power transformer fault characteristic gas detection device, in particular to a power transformer fault characteristic gas detection device based on a graphene gas sensor and a deep confidence network expert system. Background technique [0002] As the key equipment of the power system, the safe operation of large power transformers is particularly important to ensure the safety and stability of the power system. Once the transformer fails, it will cause huge losses to the national economy. Insulation status monitoring of power transformers has received much attention in the construction of smart grids. 90% of the power transformers used in power plants and substations in my country are oil-immersed transformers. The insulation system of this type of transformer is mainly insulating oil and insulating paper. During long-term operation, changes in the dissolved gas content in the oil will cause insulation performance Severe de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/12G06K9/62
CPCG01N27/125G06F18/214
Inventor 张冬至常洪燕刘静静刘润华
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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