Title :
Intrinsic fiber optic ultrasound sensor for oil immersed detection of partial discharges
Author :
Posada-Roman, J.E. ; Garcia-Souto, J.A. ; Rubio-Serrano, J.
Author_Institution :
Dept. of Electron. Technol., Univ. Carlos III de Madrid, Leganés, Spain
Abstract :
A fiber-optic ultrasound sensor is presented for acoustic detection of partial discharges in oil immersed set-ups. Its specifications are similar to R15i (optimized sensor for the detection on the walls of transformers) but for internal installation. It consists of an intrinsic fiber-optic sensing probe, an all-fiber interferometer, homodyne demodulation and an optoelectronic specific conditioning for detecting ultrasounds in the range of 100 kHz - 300 kHz. It is characterized in water and tested with real partial discharges in oil. The sensing probe is based on a multilayer coil that is customized to a specific sensitivity. It is a cost-effective solution useful for a multichannel configuration.
Keywords :
coils; fibre optic sensors; oils; optical multilayers; partial discharges; acoustic detection; all-fiber interferometer; fiber optic ultrasound sensor; frequency 100 kHz to 300 kHz; homodyne demodulation; multichannel configuration; multilayer coil; oil immersed detection; optoelectronic; partial discharge; ultrasound detection; Acoustics; Optical fiber sensors; Optical fibers; Optical interferometry; Partial discharges; Sensitivity;
Conference_Titel :
Sensors, 2011 IEEE
Conference_Location :
Limerick
Print_ISBN :
978-1-4244-9290-9
DOI :
10.1109/ICSENS.2011.6127163
