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Optical Engineering

Position location of partial discharges in power transformers using fiber acoustic sensor arrays
Author(s): Lijun Song; Kristie L. Cooper; Zhuang Wang; Anbo Wang; Yilu Liu
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Paper Abstract

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 positioning 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 3.0% 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.

Paper Details

Date Published: 1 November 2006
PDF: 6 pages
Opt. Eng. 45(11) 114401 doi: 10.1117/1.2390681
Published in: Optical Engineering Volume 45, Issue 11
Show Author Affiliations
Lijun Song, Virginia Polytechnic Institute and State Univ. (United States)
Kristie L. Cooper, Virginia Polytechnic Institute and State Univ. (United States)
Zhuang Wang, Virginia Polytechnic Institute and State Univ. (United States)
Anbo Wang, Virginia Polytechnic Institute and State Univ. (United States)
Yilu Liu, Virginia Polytechnic Institute (United States)

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