Fibre laser sensor based on a phase-shifted chirped grating for acoustic sensing of partial discharges in power transformers
S. E. U. Lima, O. Frazão, INESC Porto - Institute for Systems and Computers Engineering of Porto (Portugal); R. G: Farias, Federal University of Pará (Brazil); F. M. Araújo, L. A. Ferreira, V. Miranda, J. L. Santos, INESC Porto - Institute for Systems and Computers Engineering of Porto (Portugal)
Partial discharges are a major source of insulation failure in electric power transformers. Their detection can be achieved through the associated acoustic emissions, and this work reports on the investigation of a fibre laser sensor based on a phase-shifted chirped fibre grating for acoustic emission detection in the power transformer environment. The performance of the sensing head is characterized and compared for different surrounding media: air, water and oil.
