Distributed acoustic sensing: towards partial discharge monitoring

Philipp Rohwetter; René Eisermann; Katerina Krebber

doi:10.1117/12.2194850

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28 September 2015 Distributed acoustic sensing: towards partial discharge monitoring

Philipp Rohwetter, René Eisermann, Katerina Krebber

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Proceedings Volume 9634, 24th International Conference on Optical Fibre Sensors; 96341C (2015) https://doi.org/10.1117/12.2194850
Event: International Conference on Optical Fibre Sensors (OFS24), 2015, Curitiba, Brazil

Abstract

We report on the successful application of distributed acoustic sensing (DAS) to the detection of partial discharge (PD). A detection limit of about 1 nC discharge magnitude was achieved for PD in a real-scale model of a high voltage termination. Dedicated ultrasonic fibre-optic transducers were interrogated using coherent optical time-domain Rayleigh backscatter reflectometry (C-OTDR). Random quadrature demodulation was employed for retrieving relevant acoustic information from the raw C-OTDR backscatter traces. To our knowledge, our results are a first-time demonstration that quasi-distributed fibre-optic acoustic sensing is a candidate technology for the acoustic partial discharge monitoring of power cable joints and terminations.

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Philipp Rohwetter, René Eisermann, and Katerina Krebber "Distributed acoustic sensing: towards partial discharge monitoring", Proc. SPIE 9634, 24th International Conference on Optical Fibre Sensors, 96341C (28 September 2015); https://doi.org/10.1117/12.2194850

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