Fiber Optic Sensor for Acoustic Detection of Partial Discharges in Oil-Paper Insulated Electrical Systems
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2012
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Abstract
A fiber optic interferometric sensor with an intrinsic transducer along a length of the fiber is presented for ultrasound measurements of the acoustic emission from partial discharges inside oil-filled power apparatus. The sensor is designed for high sensitivity measurements in a harsh electromagnetic field environment, with wide temperature changes and immersion in oil. It allows enough sensitivity for the application, for which the acoustic pressure is in the range of units of Pa at a frequency of 150 kHz. In addition, the accessibility to the sensing region is guaranteed by immune fiber-optic cables and the optical phase sensor output. The sensor design is a compact and rugged coil of fiber. In addition to a complete calibration, the in-situ results show that two types of partial discharges are measured through their acoustic emissions with the sensor immersed in oil.
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posada-roman2012sensorsfiber
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| Authors | Julio Posada-Roman;Jose A. Garcia-Souto;Jesus Rubio-Serrano;Posada-Roman, Julio;Garcia-Souto, Jose A.;Rubio-Serrano, Jesus; |
| Journal | sensors |
| Year | 2012 |
| DOI |
10.3390/s120404793
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