Optical quasi-distributed simultaneous vibration and temperature sensing in stator bars of a 370-MVA electric generator

Uilian José Dreyer; Erlon Vagner da Silva; Cicero Martelli; Jean Carlos Cardozo da Silva

doi:10.1117/12.2272189

22 August 2017 Optical quasi-distributed simultaneous vibration and temperature sensing in stator bars of a 370-MVA electric generator

Uilian José Dreyer, Erlon Vagner da Silva, Cicero Martelli, Jean Carlos Cardozo da Silva

Author Affiliations +

Proceedings Volume 10453, Third International Conference on Applications of Optics and Photonics; 104531Q (2017) https://doi.org/10.1117/12.2272189
Event: Third International Conference on Applications of Optics and Photonics, 2017, Faro, Portugal

Abstract

In this paper, we propose a new multiparametric optical fiber transducer applied to an electric generator of 370 MVA. The optical transducer has three multiplexed FBGs in the same optical fiber as the sensing element. The FBG sensors can simultaneously measure both the temperature and vibration independently of the other multiplexed FBGs. The installation in the power plant was performed using six transducers and it was obtained 23 hours of simultaneous vibration and temperature measurement. All the FBGs used to monitor generator vibration were able to monitor the frequency of mechanical and electromagnetic vibrations, which were measured at 2 Hz and 120 Hz, respectively. During the measurement, the machine was turned off due to a failure and all the FBGs sensed temperature changes, as well as frequency vibration changes. The largest temperature difference measured between the FBGs during the test is approximately 2°C.

Citation Download Citation

Uilian José Dreyer, Erlon Vagner da Silva, Cicero Martelli, and Jean Carlos Cardozo da Silva "Optical quasi-distributed simultaneous vibration and temperature sensing in stator bars of a 370-MVA electric generator", Proc. SPIE 10453, Third International Conference on Applications of Optics and Photonics, 104531Q (22 August 2017); https://doi.org/10.1117/12.2272189

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KEYWORDS

Fiber Bragg gratings

Transducers

Multiplexing

Optical fibers

Fiber optics sensors

Sensors

Temperature sensors

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