Portable multi-component online monitor of gas dissolved in transformer oil

A transformer oil and dissolved gas technology, applied in instruments, measuring devices, scientific instruments, etc., can solve the problems of increased accident rate, high time and cost, error, etc., to reduce system cost, improve accuracy and reliability performance, to overcome the effect of slow response

Inactive Publication Date: 2013-11-27
ANHUI UNIVERSITY OF ARCHITECTURE
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Problems solved by technology

Although oil chromatography has sufficient detection sensitivity, conventional oil chromatography is an off-line analysis method, which has some shortcomings: not only may there be large errors in degassing, but also artificial correction of detection curves will increase the error
From oil sampling to laboratory analysis, the operation procedures are complicated, and the time and cost are high
In terms of technology and economy, it cannot meet the needs of the devel

Method used

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  • Portable multi-component online monitor of gas dissolved in transformer oil
  • Portable multi-component online monitor of gas dissolved in transformer oil

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Example Embodiment

[0019] See figure 1 , figure 2 .

[0020] The present invention uses a near-infrared DFB semiconductor laser 7 with a center wavelength of 1570 nm as CO, CO 2 The detection laser light source, the 1570 nm semiconductor laser temperature and current control module 3 controls the laser temperature and current to control the laser output center wavelength near 1570 nm, and the 100Hz sawtooth signal generated by the signal generating circuit 4 is superimposed on the laser drive current to slow the laser wavelength Scan sequentially through CO, CO 2 The gas absorption line, the signal generating circuit 4 simultaneously generates a 10KHz sine wave signal and superimposes it on the drive current of the laser to tune the laser output wavelength. Adopt near infrared DFB semiconductor laser 8 with center wavelength of 1529nm as C 2 H 2 The detection laser light source, the 1529nm semiconductor laser temperature and current control module 5 is used to tune the laser output center wav...

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Abstract

The invention discloses a portable multi-component online monitor of gas dissolved in transformer oil. A plurality of semiconductor lasers are arranged in a main chassis, each semiconductor laser is connected with a semiconductor laser controller, each semiconductor laser is jointly connected with a signal generating circuit and a 1*N photoswitch, the 1*N photoswitch is connected with an output optical fiber connector on the main chassis, the output optical fiber connector is connected into a long-optical distance gas absorption cell through an output optical fiber, the long-optical distance gas absorption cell is connected with an input optical fiber, the other end of the input optical fiber is connected with an input optical fiber connector on the main chassis, the input optical fiber connector is connected with a calibration absorption cell in the main chassis, and a focusing lens, an infrared photoelectric detector, a connecting lock-in amplifier and a data acquisition control module are sequentially arranged at a front-end light exit of the calibration absorption cell. According to the portable multi-component online monitor, the demand on safe monitoring of a transformer is met, and the high-sensitivity and real-time online monitoring of a failure of the transformer is actually realized.

Description

technical field [0001] The invention belongs to a gas laser spectrum measuring instrument, in particular to a portable multi-component online monitor for dissolved gas in transformer oil, which can simultaneously measure CO, CO 2 、C 2 h 2 and CH 4 Concentrations of the four gases. Background technique [0002] With the expansion of domestic power demand and the scale of the power grid, transformers are the key equipment of the power system, and their operational reliability directly affects the safe operation of the power system. The gas composition and concentration in transformer insulating oil largely reflect the degree of thermal and electrical faults and service life of transformers. Gas analysis in transformer oil has become an effective technical means for detecting latent faults in transformers. Research and development of multi-component and on-line detection technology of insulating oil gas has important theoretical and practical significance. [0003] The mai...

Claims

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Application Information

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IPC IPC(8): G01N21/39G01N21/03
Inventor 王敏朱达荣王雅姬敬石云
Owner ANHUI UNIVERSITY OF ARCHITECTURE
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