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System used for detecting gas in transformer insulating oil

A technology for transformer insulating oil and detection system, applied in instruments, measuring devices, scientific instruments, etc., can solve the problems of inability to meet the actual application requirements of the power sector, long detection period, and real-time online monitoring of the separation effect of chromatographic columns.

Inactive Publication Date: 2013-10-02
STATE GRID CORP OF CHINA +1
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Problems solved by technology

[0013] The accuracy of gas chromatography has been improved, but there is a long detection period, so real-time online monitoring cannot be achieved, and the separation effect of the chromatographic column is greatly affected by temperature, and the operation is complicated, etc., which cannot meet the actual application requirements of the power sector

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  • System used for detecting gas in transformer insulating oil
  • System used for detecting gas in transformer insulating oil
  • System used for detecting gas in transformer insulating oil

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Embodiment Construction

[0041] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0042] An embodiment of the present invention provides a gas detection system in transformer insulating oil, see figure 1 , The detection system for gas in transformer insulating oil includes a light source module 1 connected by signals, a chopper module 2, a photoacoustic cell module 3, a signal processing module 4, and a controller module 5.

[0043] Specifically, the light source module 1 is composed of a light source and a filter. The light source module uses a laser to generate laser light, and uses an optical filter to filter the laser light. The light source plays the role of providing excitation in the detection system and is the energy source for generating photoacoustic signals. The radiation characteristics of the light so...

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Abstract

The invention discloses a system used for detecting gas in transformer insulating oil, and belongs to the field of electrical equipment. The system used for detecting gas in transformer insulating oil comprises: a light source module, a chopper module, a photoacoustic cell module, a signal processing module, and a controller module which are connected by signals. The chopper module comprises a chopper; the chopper comprises a motor drive circuit, a motor, a raster encoder code wheel, a Hall sensor and a display screen; the motor drive circuit receives control instruction of the controller module by serial port communication, and control the motor to rotate according to the control instruction; the raster encoder code wheel is connected with a front shaft of the motor; and the Hall sensor is connected with a back shaft of the motor. A combination structure formed by a semiconductor laser and an optical filter is applied in the light source module; a resonant photoacoustic cell structure is applied in the photoacoustic cell, and lock-in amplifier technologies are applied in the signal processing module. The control module is used for system control and calculation of gas concentration. The system used for detecting gas in transformer insulating oil has advantages of fast detecting speed, high detecting accuracy and excellent user-machine interactivity.

Description

technical field [0001] The invention relates to the field of electric equipment, in particular to a gas detection system in transformer insulating oil. Background technique [0002] Large-scale power transformer is one of the most important electrical equipment in the power grid, and it is the hub between power grids of different voltage levels. Its reliability determines the safety of the power grid to a certain extent. [0003] Oil-filled transformers are generally used in high-voltage and large-capacity power transformers at home and abroad. When internal faults occur in such transformers, the insulating oil usually contains fault gas. Therefore, the most effective method for fault analysis and life prediction of oil-filled transformers is to detect the gas concentration in the transformer insulating oil. [0004] The main internal insulating materials of oil-filled power transformers include transformer insulating oil, paper and cardboard and other A-level insulating ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/01G01N21/17
CPCG01N21/1702G01N2021/1704
Inventor 宋飞席超李廷辉
Owner STATE GRID CORP OF CHINA
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