Compact QEPAS humidity sensor in SF6 buffer gas for high-voltage gas power systems

dc.citation.articleNumber100319en_US
dc.citation.journalTitlePhotoacousticsen_US
dc.citation.volumeNumber25en_US
dc.contributor.authorYin, Xukunen_US
dc.contributor.authorDong, Leien_US
dc.contributor.authorWu, Hongpengen_US
dc.contributor.authorGao, Miaoen_US
dc.contributor.authorZhang, Leen_US
dc.contributor.authorZhang, Xueshien_US
dc.contributor.authorLiu, Lixianen_US
dc.contributor.authorShao, Xiaopengen_US
dc.contributor.authorTittel, Frank K.en_US
dc.date.accessioned2022-01-07T16:17:17Zen_US
dc.date.available2022-01-07T16:17:17Zen_US
dc.date.issued2022en_US
dc.description.abstractIn SF6 insulated high-voltage gas power systems, H2O is the most problematic impurity which not only decreases insulation performance but also creates an acidic atmosphere that promotes corrosion. Corrosion damages electrical equipment and leads to leaks, which pose serious safety hazards to people and the environment. A QEPAS-based sensor system for the sub-ppm level H2O detection in SF6 buffer gas was developed by use of a near-infrared commercial DFB diode laser. Since the specific physical constants of SF6 are strongly different from that of N2 or air, the resonant frequency and Q-factor of the bare quartz tuning fork (QTF) had changed to 32,763 Hz and 4173, respectively. The optimal vertical detection position was 1.2 mm far from the QTF opening. After the experimental optimization of acoustic micro-resonator (AmR) parameters, gas pressures, and modulation depths, a detection limit of 0.49 ppm was achieved for an averaging time of 1 s, which provided a powerful prevention tool for the safety monitoring in power systems.en_US
dc.identifier.citationYin, Xukun, Dong, Lei, Wu, Hongpeng, et al.. "Compact QEPAS humidity sensor in SF6 buffer gas for high-voltage gas power systems." <i>Photoacoustics,</i> 25, (2022) Elsevier: https://doi.org/10.1016/j.pacs.2021.100319.en_US
dc.identifier.digital1-s2-0-S2213597921000781-mainen_US
dc.identifier.doihttps://doi.org/10.1016/j.pacs.2021.100319en_US
dc.identifier.urihttps://hdl.handle.net/1911/111906en_US
dc.language.isoengen_US
dc.publisherElsevieren_US
dc.rightsThis is an open access article under the CC BY-NC-ND licenseen_US
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/en_US
dc.titleCompact QEPAS humidity sensor in SF6 buffer gas for high-voltage gas power systemsen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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