Improved fibre optic acoustic sensors for partial discharge in elastomeric insulations

Philipp Rohwetter; Chaiyaporn Lothongkam; Wolfgang Habel; Gerd Heidmann; Daniel Pepper

doi:10.1117/12.2059489

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2 June 2014 Improved fibre optic acoustic sensors for partial discharge in elastomeric insulations

Philipp Rohwetter, Chaiyaporn Lothongkam, Wolfgang Habel, Gerd Heidmann, Daniel Pepper

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Proceedings Volume 9157, 23rd International Conference on Optical Fibre Sensors; 91571J (2014) https://doi.org/10.1117/12.2059489
Event: OFS2014 23rd International Conference on Optical Fiber Sensors, 2014, Santander, Spain

Abstract

Partial discharge in elastomeric high voltage insulations is a major reason for device failure. The special challenges of the high voltage environment limit the use of conventional acoustic emission sensors. Fibre-optic sensors can cope with these challenges thanks to their optical sensing principle and the use of all-dielectric materials. In this contribution, improvements to a previously introduced design of ultrasonic fibre-optic acoustic partial discharge sensors for elastomeric insulations are presented. The improved performance of fibre-optic acoustic sensors in detecting AC partial discharge is demonstrated. Furthermore, their ability to detect low-level damage processes in elastomeric insulation under DC dielectric stress is shown to outperform the highly sensitive electrical detection method.

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Philipp Rohwetter, Chaiyaporn Lothongkam, Wolfgang Habel, Gerd Heidmann, and Daniel Pepper "Improved fibre optic acoustic sensors for partial discharge in elastomeric insulations", Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 91571J (2 June 2014); https://doi.org/10.1117/12.2059489

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