Title :
Using Cross-Correlation Coefficients to Analyze Transformer Sweep Frequency Response Analysis (SFRA) Traces
Author :
Kennedy, G.M. ; McGrail, A.J. ; Lapworth, J.A.
Author_Institution :
Doble Eng. Co., Watertown, MA
Abstract :
Sweep frequency response analysis (SFRA) is one of the most powerful diagnostic tools for assessing mechanical damage to a transformer winding. Analysis of the results, which are in the form of frequency response traces can, however, be daunting to new users. One approach is to attempt automated analysis, and this paper presents an approach using cross- correlation coefficients. This is a power signal processing tool that can simplify result interpretation in some cases and allow limits to be created.
Keywords :
correlation methods; fault diagnosis; frequency response; power transformers; transformer windings; SFRA traces; automated analysis; cross-correlation coefficient; power signal processing tool; sweep frequency response analysis; transformer winding; Circuit faults; Frequency response; IEC standards; Impedance measurement; Insulators; Laboratories; Low voltage; Power transformers; Testing; Transformer cores;
Conference_Titel :
Power Engineering Society Conference and Exposition in Africa, 2007. PowerAfrica '07. IEEE
Conference_Location :
Johannesburg
Print_ISBN :
978-1-4244-1477-2
Electronic_ISBN :
978-1-4244-1478-9
DOI :
10.1109/PESAFR.2007.4498059
