12 May 2016 Development and field trial of a FBG-based magnetic sensor for large hydrogenerators
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We propose a passive optical sensor for online magnetic field monitoring in large hydrogenerators, based on FBG (Fiber Bragg Grating) technology and a magnestostrictive material (Terfenol-D). The objective of this sensor is to detect faults in the rotor windings due to inter turn short-circuits. This device is packaged in a novel rod-shaped enclosure, allowing it to be easily installed on the ventilation ducts of the stator of the machine. This sensor was developed and tested in laboratory and it has been evaluated in a field test on a 200 MVA, 60 poles hydrogenerator.
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João P. V. Fracarolli, João P. V. Fracarolli, João B. Rosolem, João B. Rosolem, Elias K. Tomiyama, Elias K. Tomiyama, Claudio Floridia, Claudio Floridia, Rivael S. Penze, Rivael S. Penze, Rodrigo Peres, Rodrigo Peres, Danilo C. Dini, Danilo C. Dini, Claudio A. Hortencio, Claudio A. Hortencio, Paulo I. G. Dilli, Paulo I. G. Dilli, Erlon V. da Silva, Erlon V. da Silva, Marcéu C. dos Santos, Marcéu C. dos Santos, Fabiano Fruett, Fabiano Fruett, } "Development and field trial of a FBG-based magnetic sensor for large hydrogenerators", Proc. SPIE 9852, Fiber Optic Sensors and Applications XIII, 98520L (12 May 2016); doi: 10.1117/12.2223919; https://doi.org/10.1117/12.2223919

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