基于悬臂梁增强型光声光谱的SF<sub>6</sub>特征分解组分H<sub>2</sub>S定量检测

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Abstract As one of the key characteristic components caused by SF₆ decomposition in the SF₆ gas insulated electrical equipment,H₂S could effectively reflect the severity of the internal insulation faults and whether the faults involve solid insulation material.The paper builds a cantilever enhanced photoacoustic (PA) spectrometry (CEPAS) trace gas detection system based on the micro cantilever microphone and distributed feedback-diode laser.The characteristic absorption line of H₂S with a central wavenumber of 6 336.62 cm^-1in v₁+v₂+v₃ overtones absorption band is selected as the study objective.The frequency response of the CEPAS detection system is tested,and the quantitative relationship between the PA signal amplitude and the gas concentration is studied.The results show that there is a good linear relationship between the PA signal amplitude and the gas concentration.The detection limit of the CEPAS system for tracing H₂S in N₂ is 0.84*10^-6,and H₂S in SF₆ is 1.75*10^-6.It may be a powerful data supplement for the SF₆ decomposition components method in recognizing the internal fault category and severity of the SF₆ gas insulation electrical equipment.

Key words： SF₆ characteristic decomposition components H₂S cantilever enhanced photoacoustic spectrometry quantitative detection

Received: 20 May 2015 Published: 24 August 2016

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TM595

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	Zhang Xiaoxing
	Li Xin
	Liu Heng
	Li Jian
	Cheng Zheng

Cite this article:

Zhang Xiaoxing,Li Xin,Liu Heng等. The Quantitative Detection of SF₆ Characteristic Decomposition Component H₂S Based on Cantilever Enhanced Photoacoustic Spectrometry[J]. Transactions of China Electrotechnical Society, 2016, 31(15): 187-196.

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https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2016/V31/I15/187

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