Fiber Bragg Grating Sensor for Electric Field Measurement in the End Windings of High-Voltage Electric Machines

This paper reports proof-of-principle of an optical fiber Bragg grating (FBG) operating as an electric field sensor. The system is based on a semiconductor diode laser, emitting around 1577.5 nm that interrogates the fiber sensor around its maximum reflectivity point. The application of a strong ele...

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Bibliographic Details
Published in:IEEE transactions on industrial electronics (1982) 2016-05, Vol.63 (5), p.2796-2802
Main Authors: Marignetti, Fabrizio, de Santis, Enzo, Avino, Saverio, Tomassi, Gianni, Giorgini, Antonio, Malara, Pietro, De Natale, Paolo, Gagliardi, Gianluca
Format: Article
Language:English
Subjects:
AC machines
Bragg gratings
Electric field sensors
Electric fields
Electric machines
Electric potential
Electric power generation
Fiber Bragg Grating
Fiber gratings
Fibers
Gratings (spectra)
Optical fiber sensors
Optical fibers
Reflectivity
Sensors
strain sensing
Voltage measurement
voltage sensors
Windings
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Summary:This paper reports proof-of-principle of an optical fiber Bragg grating (FBG) operating as an electric field sensor. The system is based on a semiconductor diode laser, emitting around 1577.5 nm that interrogates the fiber sensor around its maximum reflectivity point. The application of a strong electric field causes a small variation of the optical path length of the waveguide due to electrostriction and thus perturbs the grating peak reflectivity wavelength. Calibration and dynamic range tests are performed using a parallel-plate capacitor to create a variable electric field (1-100 kV/cm). A great potential is pointed out in view of possible field applications for voltage graduation in power generators.
ISSN:0278-0046
1557-9948
DOI:10.1109/TIE.2016.2516500