Acta Photonica Sinica, Volume. 50, Issue 11, 1130001(2021)
Research on Interference Characteristics of C3 Components to Photoacoustic Spectroscopy Detection of C1 and C2 Gases
When the transformer is overheated or has a discharge failure, characteristic gases such as C1 and C2 gases are dissolved in the insulating oil. There is also a small amount of C3 component gases that may interfere with the detection of other characteristic gases. By analyzing the causes of gas cross-interference and the infrared absorption spectra of C1, C2, and C3 component gases, the gas absorption coefficients within the filter bandwidth were studied and the interference coefficients of C3H8 and C3H6 gases to C1 and C2 gases were theoretically calculated. According to the analysis results, the parameters of the optical filters were determined. A photoacoustic spectroscopy based multi-component gas analysis system using infrared thermal radiation source and non-resonant photoacoustic cell was built. The experimental results show that the interference coefficient of C3H8 gas to CH4, C2H6, C2H4, C2H2 is 3.78%, 84%, 1.5% and 1.6%, respectively. The interference coefficient of C3H6 gas to CH4, C2H6, C2H4, C2H2 is 2%, 32%, 69.6% and 2.6%, respectively. This research is of great significance for evaluating and guiding the improvement of the technical performance of photoacoustic equipment for dissolved gas analysis in transformer oil.
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Chenxi LI, Guangzhen WANG, Dehui FU, Guangyin ZHANG, Min GUO, Bo ZHANG, Shuai YUAN, Ke CHEN. Research on Interference Characteristics of C3 Components to Photoacoustic Spectroscopy Detection of C1 and C2 Gases[J]. Acta Photonica Sinica, 2021, 50(11): 1130001
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Received: May. 8, 2021
Accepted: Aug. 27, 2021
Published Online: Dec. 2, 2021
The Author Email: CHEN Ke (chenke@dlut.edu.cn)