Research on High Sensitive D-Shaped FBG Hydrogen Sensors in Power Transformer Oil
AbstractDissolved hydrogen is a symbol gas decomposed by power transformer oil for electrical faults such as overheat or partial discharges. A novel D-shaped fiber Bragg grating (D-FBG) sensor is herein proposed and was fabricated with magnetron sputtering to measure the dissolved hydrogen concentration in power transformer oil in this paper. Different from the RI (refractive index)-based effect, D-FBG in this case is sensitive to curvature caused by stress from sensing coating, leading to Bragg wavelength shifts accordingly. The relationship between the D-FBG wavelength shift and dissolved hydrogen concentration in oil was measured experimentally in the laboratory. The detected sensitivity could be as high as 1.96 μL/L at every 1-pm wavelength shift. The results proved that a simple, polished FBG-based hydrogen sensor provides a linear measuring characteristic in the range of low hydrogen concentrations in transformer oil. Moreover, the stable hydrogen sensing performance was investigated by X-ray diffraction analysis. View Full-Text
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Luo, Y.-T.; Wang, H.-B.; Ma, G.-M.; Song, H.-T.; Li, C.; Jiang, J. Research on High Sensitive D-Shaped FBG Hydrogen Sensors in Power Transformer Oil. Sensors 2016, 16, 1641.
Luo Y-T, Wang H-B, Ma G-M, Song H-T, Li C, Jiang J. Research on High Sensitive D-Shaped FBG Hydrogen Sensors in Power Transformer Oil. Sensors. 2016; 16(10):1641.Chicago/Turabian Style
Luo, Ying-Ting; Wang, Hong-Bin; Ma, Guo-Ming; Song, Hong-Tu; Li, Chengrong; Jiang, Jun. 2016. "Research on High Sensitive D-Shaped FBG Hydrogen Sensors in Power Transformer Oil." Sensors 16, no. 10: 1641.
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