TY - GEN
T1 - A new technique for a better sweep frequency response analysis interpretation
AU - Al Murawwi, Esam
AU - Barkat, Braham
PY - 2012
Y1 - 2012
N2 - This paper presents a new technique for a better and faster sweep frequency response analysis (SFRA) results' interpretation. The proposed technique is based on the time-frequency analysis. Unlike the Fourier transform (FT) which is a 1-dimensional representation, a time-frequency distribution (TFD) is a 2-dimensional representation where both time and frequency are present in one plot. Moreover, noise can affect the SFRA signal and affect the interpretation of the results which may lead to misinterpretation of the results. However, noise will have less effect on the TFD signal. By just looking at the TFD of the SFRA signal, we can conclude whether the signal comes from a healthy or unhealthy transformer. To quantitatively assess the strength of the proposed technique, we evaluate the cross-correlation coefficient of the computed TFDs. Different case studies are presented to show the superiority of the proposed technique compared to the existing FT based SFRA.
AB - This paper presents a new technique for a better and faster sweep frequency response analysis (SFRA) results' interpretation. The proposed technique is based on the time-frequency analysis. Unlike the Fourier transform (FT) which is a 1-dimensional representation, a time-frequency distribution (TFD) is a 2-dimensional representation where both time and frequency are present in one plot. Moreover, noise can affect the SFRA signal and affect the interpretation of the results which may lead to misinterpretation of the results. However, noise will have less effect on the TFD signal. By just looking at the TFD of the SFRA signal, we can conclude whether the signal comes from a healthy or unhealthy transformer. To quantitatively assess the strength of the proposed technique, we evaluate the cross-correlation coefficient of the computed TFDs. Different case studies are presented to show the superiority of the proposed technique compared to the existing FT based SFRA.
KW - Cross-Correlation Coefficient
KW - Fourier Transform
KW - Power Transformers
KW - Sweep Frequency Response Analysis
KW - Time-Frequency Analysis
UR - http://www.scopus.com/inward/record.url?scp=84866935867&partnerID=8YFLogxK
U2 - 10.1109/ELINSL.2012.6251491
DO - 10.1109/ELINSL.2012.6251491
M3 - Conference contribution
AN - SCOPUS:84866935867
SN - 9781467304887
T3 - Conference Record of IEEE International Symposium on Electrical Insulation
SP - 366
EP - 370
BT - Conference Record of the 2012 IEEE International Symposium on Electrical Insulation, ISEI 2012
T2 - 2012 19th IEEE International Symposium on Electrical Insulation, ISEI 2012
Y2 - 10 June 2012 through 13 June 2012
ER -