Scientific Results

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

Year: 2016

Authors: Marignetti F., de Santis E., Avino S., Tomassi G., Giorgini A., Malara P., De Natale P., Gagliardi G.

Autors Affiliation: Department of Electrical and Information Engineering, University of Cassino and Southern Latium, I-03043
Cassino, Italy;
Laboratory of Advanced ElectroDynamics, LEDA srl, I-03043 Cassino, Italy;
Consiglio Nazionale delle Ricerche, Istituto Nazionale di Ottica (INO), 50125 Florence, Italy;

Abstract: 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.

Journal/Review: IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS

Volume: 63 (5)      Pages from: 2796  to: 2802

KeyWords: Bragg gratings; Electric field measurement; Electric fields; Electric machinery; Fiber Bragg gratings; Fiber optic sensors; Fibers; Machine windings; Optical fibers; Power semiconductor diodes; Reflection; Semiconductor diodes, AC machine; Electric field sensors; Fiber Bragg Grating Sensors; Optical path lengths; Parallel plate capacitors; Strain sensing; Strong electric fields; Voltage sensor, Electric windings
DOI: 10.1109/TIE.2016.2516500

Citations: 18
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