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Online monitoring system for gas content in transformer oil by using photoacoustic spectrum

A technology of photoacoustic spectroscopy and transformer oil, which is used in the measurement of color/spectral characteristics, material analysis by optical means, instruments, etc., can solve the problem of manual correction of detection curves to increase errors, failure to find faults in real time, and artificial degassing operations. Errors and other problems, to achieve the effect of reducing complexity and system instability, stable operation, and simplified structure

Active Publication Date: 2012-07-04
KUNSHAN HEZHI ELECTRICAL EQUIP
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Problems solved by technology

The off-line gas chromatograph has the advantages of good selectivity, high separation performance, fast separation time, high sensitivity and wide application range, but there are also a series of shortcomings, such as human error in degassing operation, manual correction of detection curve, etc. It will also increase the error; from oil sampling to oil and gas separation to laboratory analysis, the operation procedure is complicated and takes a long time; in addition, the development of insulation deterioration varies from time to time, and preventive experiments cannot detect faults in real time. On-line monitoring of gas content in oil has become an urgent need
The online gas chromatograph monitoring system solves the shortcomings of the off-line gas chromatograph, such as long detection cycle and long analysis time.
However, most of the current online gas chromatography monitoring systems, such as the method mentioned in the "MGA2000 Transformer Oil Gas Online Monitoring Device" of Ningbo University of Technology, only use gas in oil smart sensors for measurement, which has low measurement accuracy, less gas to be measured, and long-term work. Unstable and heavy maintenance

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  • Online monitoring system for gas content in transformer oil by using photoacoustic spectrum
  • Online monitoring system for gas content in transformer oil by using photoacoustic spectrum

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Embodiment Construction

[0021] According to the following figure 1 , the preferred embodiment of the present invention is described in detail.

[0022] like figure 1 As shown, the system for on-line monitoring of gas content in transformer oil using photoacoustic spectroscopy provided by the present invention includes an oil circuit system, a gas circuit control module, a photoacoustic spectrum monitoring module and a signal conditioning analysis module.

[0023] The oil circuit system includes a transformer 1 , an oil tank 3 , a threaded polymer membrane tube 5 , an oil return pump 6 and a flow meter 7 which are sequentially connected by pipelines and form a loop.

[0024] The gas path control module includes a gas collection chamber 4 arranged outside the threaded polymer membrane tube 5 , and a buffer chamber 8 connected to the gas collection chamber 4 by a gas path.

[0025] The photoacoustic spectrum monitoring module includes an infrared light source 11, a spherical reflector 10 arranged on t...

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Abstract

The invention relates to an online monitoring system for gas content in transformer oil by using photoacoustic spectrum; the online monitoring system comprises an oil line system, a gas path control module, a photoacoustic spectrum monitoring module and a signal conditioning and analyzing module. The online monitoring system is based on the photoacoustic spectrometry, can replace an offline chromatographic instrument and operate stably for long time on site, can be used for detecting various gases and simultaneously greatly reduces the complexity of detecting the oil line in a transformer on line and the instability of the system.

Description

technical field [0001] The invention relates to the field of on-line monitoring of high-voltage electrical equipment, in particular to a system for on-line monitoring of gas content in transformer oil by using photoacoustic spectroscopy. Background technique [0002] Since the current periodic maintenance system generally implemented in the power system has not adapted to the needs of the reform and development of the power system and the requirements of power users for the reliability of power supply, power companies have urgently needed to implement more advanced condition maintenance in the world, that is, according to the equipment The running state determines whether maintenance is needed and how to maintain it, and online monitoring is a necessary and effective means to carry out condition maintenance of high-voltage electrical equipment. [0003] Since electrical equipment such as power transformers and bushings use insulating oil or an insulating structure composed o...

Claims

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Application Information

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IPC IPC(8): G01N21/17G01N21/35G01N21/3504
CPCG01N21/1702G01N2021/1704
Inventor 李喆王俏华王志浩尹毅熊益吴艳竹刘杰
Owner KUNSHAN HEZHI ELECTRICAL EQUIP
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