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000000242 001__ 242
000000242 037__ $$aENY-ARTICLE-2008-191
000000242 041__ $$aeng
000000242 088__ $$aI07/2006/I-037
000000242 100__ $$aBracale, A$$uUniversita degli Studi di Napoli “Federico II”, Napoli, Italy
000000242 245__ $$aTime-frequency analysis of non-stationary phenomena in electrical engineering
000000242 260__ $$c2006-01-06
000000242 300__ $$a6p
000000242 500__ $$aModern electric power systems. MEPS '06. Proceedings of the international symposium, Wrocław, September 6-8, 2006 /  Wrocław : Institute of Electrical Power Engineering. Wrocław University of Technology, pp. 373-378
000000242 520__ $$aThis paper serves the idea of applying joint time-frequency representations in electrical engineering. Main directions of researches are concentrated around Cohen’s class of transformation which gives some possibilities of adaptation for analysed signal by choosing appropriate kernel function. Additionally, novel approach delivered by S-transform is also introduced. In order to investigate the methods several experiments were performed using simulated phenomena of switching on the capacitor banks in distribution system. Firstly some aspect of S-transform application were present. Then the influence of different kernel functions were investigated when Wigner-Ville, Choi-Williams and Zhao-Atlas-Marks distributions were applied. Obtained results were supplemented by comparison to classical spectrogram. Proposed methods allowed to track instantaneous frequency as well as energy with better time-frequency precision than classical spectrogram. It leads to applications in diagnosis and power quality area. 
000000242 6531_ $$atime-frequency analysis
000000242 6531_ $$apower system signal analysis
000000242 6531_ $$apower system harmonics
000000242 6531_ $$asignal analysis
000000242 6531_ $$aelectric variables
000000242 6531_ $$aestimation
000000242 700__ $$aCarpinelli, G$$uUniversita degli Studi di Napoli “Federico II”, Napoli, Italy
000000242 700__ $$aWozniak, K$$uWroclaw University of Technology, Poland
000000242 700__ $$aSikorski, T$$uWroclaw University of Technology, Poland
000000242 700__ $$aLeonowicz, Z$$uWroclaw University of Technology, Poland
000000242 8560_ $$fleon99@pwr.wroc.pl
000000242 8564_ $$uhttp://zet10.ipee.pwr.wroc.pl/record/242/files/$$zAccess to Fulltext
000000242 909CO $$ooai:zet10.pwr.wroc.pl:242$$pglobal
000000242 980__ $$aARTICLE