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The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of Open Access research papers by University of Strathclyde researchers, including by researchers from the Department of Computer & Information Sciences involved in mathematically structured programming, similarity and metric search, computer security, software systems, combinatronics and digital health.

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Principal component and hierarchical cluster analyses as applied to transformer partial discharge data with particular reference to transformer condition monitoring

Babnik, T. and Aggarwal, R.K. and Moore, P.J. (2008) Principal component and hierarchical cluster analyses as applied to transformer partial discharge data with particular reference to transformer condition monitoring. IEEE Transactions on Power Delivery, 23 (4). pp. 2008-2016. ISSN 0885-8977

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Abstract

This paper analyses partial discharges obtained by remote radiometric measurements from a power transformer with a known internal defect. Since fingerprints of remote radiometric measurements are not available, the formation of clusters with similar features obtained from captured partial discharge data is crucial. Hierarchical cluster analysis technique is used as a method for grouping different signals. Investigation based on Euclidian and Mahalanobis distance measures and Ward and Average linkage algorithms were performed on partial discharge data pre-processed by principal component analysis. As a result of the analysis, a clear separation of partial discharges emanating from the transformer and discharges emanating from its surrounding is achieved; this in turn should enhance the methodologies for condition monitoring of power transformers.