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In this paper, a multichannel instrumentation system for the location of partial discharges (PDs) in power transformers is presented. It is based on the detection of the acoustic emissions from PDs in oil with several piezoelectric (PZT) and fiber optic sensors. An acoustic detection and location approach is proposed based on a time reference given by one fiber optic sensor installed inside the tank...
In this paper an instrumentation system with multichannel acquisition and denoising is described and characterized for detecting and locating acoustic emissions from partial discharges in oil. A fiber optic immersed sensor and four external ultrasonic piezoelectric sensors where used in this implementation. A signal processing system based on the use of digital denoising techniques and location algorithms...
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