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Measurement System of Dissolved Gas Components in Transformer Oil Based on Time Division Multiplexing

A transformer oil and time-division multiplexing technology, which is applied in the direction of color/spectral characteristic measurement, etc., can solve the problems of low measurement accuracy, cross-interference of background gas, long measurement time, etc.

Active Publication Date: 2020-10-23
HUNAN WULING POWER TECH CO LTD
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Problems solved by technology

[0005] The present invention aims to solve the problems of low measurement accuracy, long measurement time and limited measurement environment caused by the cross-interference of background gas in traditional spectroscopic gas measurement, and further provides a time-division multiplexing-based TDLAS measurement of dissolved gas components in transformer oil system

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  • Measurement System of Dissolved Gas Components in Transformer Oil Based on Time Division Multiplexing
  • Measurement System of Dissolved Gas Components in Transformer Oil Based on Time Division Multiplexing
  • Measurement System of Dissolved Gas Components in Transformer Oil Based on Time Division Multiplexing

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Embodiment Construction

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] see figure 1 and figure 2 It is illustrated that the time division multiplexing-based TDLAS transformer oil dissolved gas composition measurement system includes a conversion relay group 101, a laser group 102, a fiber beam splitter 103, a collimating mirror 104, a hollow fiber air chamber 106, a temperature sensor 108, and a temperature controller. 107, focuser 121, vacuum pump 119, exhaust gas treatment device 118, photodetector 115, preamplifier 112, lock-in amplifier 111, A / D converter 109, I / O converter 113, laser controller 114 and embedded computer 110;

[0018] The signal line of the embedded computer 110 is connected to the I / O converter 113 and the A / D converter 109 , one signal output end of the I / O converter 113 is connected to the switch relay group 101 , and the other side of the I / O converter 113 is connected to the switch relay g...

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Abstract

The invention relates to a system for measuring components of a dissolved gas in TDLAS transformer oil, and concretely relates to a time division multiplexing-based system for measuring components ofa dissolved gas in TDLAS transformer oil in order to solve the problems of low measurement precision caused by easy cross interference brought by a background gas, long measurement time and measurement environment limitation of conventional spectroscopic gas measurement. The system includes a switching relay group, a laser group, a fiber splitter, a collimating mirror, a hollow fiber gas chamber,a temperature sensor, a temperature controller, a focalizer, a vacuum pump, an exhaust gas treatment device, a photodetector, a preamplifier, a lock-in amplifier, an A / D converter, an I / O converter, alaser controller and an embedded computer; and the signal lines of the embedded computer are connected with the I / O converter and the A / D converter. The system is used for measuring the components ofthe dissolved gas in the transformer oil.

Description

technical field [0001] The invention relates to a measuring system for dissolved gas components in transformer oil, which belongs to the field of gas detection. Background technique [0002] In transformer fault detection, gas detection in transformer oil is a stressful means of judging transformer insulation faults. It plays an important role in the reliability of strong power grid power supply. Dissolved gas detection methods in transformer oil mainly include: gas chromatography, Fourier transform infrared spectroscopy, laser photoacoustic spectroscopy, array gas sensor method, semiconductor gas sensor method, TCD thermal conductivity detection sensor method. Tunable Laser Absorption Spectroscopy (TDLAS) uses the narrow linewidth and tunable characteristics of lasers to scan the characteristic absorption lines of the gas to be measured, thereby realizing qualitative and quantitative measurement of trace gases. TDLAS can eliminate the cross-interference of other gas spect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/39
CPCG01N21/39
Inventor 万元胡边夏代雄戴景民李钊
Owner HUNAN WULING POWER TECH CO LTD
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