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Optical high voltage breakdown prediction using thermal lensing effect in transformer oil

Struebig, Robin and Glesk, Ivan (2016) Optical high voltage breakdown prediction using thermal lensing effect in transformer oil. In: International Conference on Renewable Energies (ICREPQ 2016), 2016-05-04 - 2016-05-06, Universidad Pontificia de Comillas.

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Abstract

We describe an optical system to monitor microscopic pre-breakdown events in liquid insulation. The system has successfully demonstrated its ability to predict high voltage breakdown in transformer oil. A simple theory based on a thermal lens build up between electrodes as a result of applied voltage is presented to explain the system operation and obtained measured results.