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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 applied in the direction of material analysis, instruments, and measuring devices through optical means, and can solve problems such as manual correction of detection curves to increase errors, failure to find faults in real time, and human errors in degassing operations. , to achieve the effects of reducing complexity and system instability, running stably, and simplifying the structure

Active Publication Date: 2014-07-09
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

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Embodiment Construction

[0021] based on the following figure 1 , specifically explain the preferred embodiment of the present invention.

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

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

[0024] The air path control module includes an air collection chamber 4 arranged outside the threaded polymer film tube 5 , and a buffer chamber 8 connected to the air collection chamber 4 through an air path.

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

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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 regular maintenance system commonly implemented in the power system is no longer suitable for the needs of power system reform and development and the requirements of power users for power supply reliability, power companies have urgently needed to implement more advanced condition-based maintenance in the world, that is, according to the equipment The operating status determines whether maintenance is needed and how to maintain it, and online monitoring is a necessary and effective means to implement condition-based maintenance of high-voltage electrical equipment. [0003] Since power transformers, bushings and other electrical equipment are all made of insulating oil or oil paper and cardboa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/3577G01N21/3504
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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