Next Article in Journal
Rapid On-Site Formation of a Free-Standing Flexible Optical Link for Sensing Applications
Next Article in Special Issue
An Optical Fiber Sensor and Its Application in UAVs for Current Measurements
Previous Article in Journal
Eddy-Current Sensors with Asymmetrical Point Spread Function
Previous Article in Special Issue
Strain Modal Analysis of Small and Light Pipes Using Distributed Fibre Bragg Grating Sensors
Article Menu

Export Article

Open AccessArticle
Sensors 2016, 16(10), 1641;

Research on High Sensitive D-Shaped FBG Hydrogen Sensors in Power Transformer Oil

Electric Power Research Institute of Guangdong Power Grid Co., Ltd., Guangzhou 510080, China
State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, China
Author to whom correspondence should be addressed.
Received: 17 July 2016 / Accepted: 15 September 2016 / Published: 4 October 2016
(This article belongs to the Special Issue Recent Advances in Fiber Bragg Grating Sensing)
Full-Text   |   PDF [3848 KB, uploaded 8 October 2016]   |  


Dissolved 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
Keywords: FBG; dissolved hydrogen concentration; power transformer oil; curvature; sensitivity FBG; dissolved hydrogen concentration; power transformer oil; curvature; sensitivity

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

Share & Cite This Article

MDPI and ACS Style

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.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top