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Position location of partial discharges in power transformers using fiber acoustic sensor arrays

机译：Position location of partial discharges in power transformers using fiber acoustic sensor arrays

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摘要

A novel partial-discharge positioning system was demonstrated using an acoustic sensor array composed of four fiber acoustic sensors and a signal-processing unit. A hyperbolic position-fixing algorithm was employed to locate partial discharges. Convolution, correlation, and leading edge with finite impulse response filtering were used to determine time differences of arrival (TDOAs). Partial-discharge posi-tioning was demonstrated in a 500-gallon tank. The positioning results showed that the correlation and leading edge methods are more robust and accurate in determining the TDOAs than the convolution method. A positioning accuracy of 3.0percent was achieved using the leading edge method with a sensing range of 755 mm. These positioning results also indicated that the best sensor array layout is to spread the sensors in the tank in order to achieve high positioning accuracy.

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