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Oil‐paper insulation partial discharge ultrasonic multifrequency sensing array based on fibre‐optic Fabry–Perot sensor
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Oil‐paper insulation partial discharge ultrasonic multifrequency sensing array based on fibre‐optic Fabry–Perot sensor
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Journal Article
Oil‐paper insulation partial discharge ultrasonic multifrequency sensing array based on fibre‐optic Fabry–Perot sensor
2022
Overview
In order to improve the sensitivity and accuracy of oil‐paper insulation partial discharge detection by the fibre‐optic Fabry–Perot (FP) ultrasonic sensor, this work studied the ultrasonic signal’s frequency characteristics of typical oil‐paper insulation partial discharges and the vibration characteristics of the FP sensor’s diaphragm in the liquid environment. Based on the works above, a multifrequency FP sensor array is proposed, consisting of several FP sensors with different resonant frequencies to detect partial discharges. The experimental results show that the liquid environment has a significant effect on the vibration characteristics of the FP sensor’s diaphragm, and the sensitivity and accuracy of partial discharge detection can be improved based on the multifrequency FP sensing array, which can also be applied in the pattern recognition and localisation of partial discharges.
Publisher
John Wiley & Sons, Inc,Wiley
