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000000046 001__ 46
000000046 037__ $$aENY-ARTICLE-2008-038
000000046 041__ $$aeng
000000046 100__ $$aLeonowicz, Z$$uWroclaw University of Technology, Poland
000000046 245__ $$aSpectrum estimation of non- stationary signals in power systems
000000046 260__ $$c2003-02-26
000000046 300__ $$a6p
000000046 500__ $$aProceedings of the 5th International Conference on Power Systems Transients. IPST 2003 , New Orleans, Louisiana, USA, September 28th - October 2nd, 2003. pp. 18
000000046 520__ $$aTime-varying spectra of non-stationary time-series commonly used are spectrograms from the Short-Time Fourier Transform (STFT). The most prominent limitation of the Fourier Transform is that of frequency resolution. To overcome the limitation the Wavelet Transform, Wigner-Ville Distribution and the Min-Norm subspace method have been applied for spectrum estimation of non-stationary signals caused by switching on capacitor banks and by a short circuit at the output of a frequency converter. Investigation results confirm the advantages of the advanced methods.
000000046 6531_ $$afault diagnosis
000000046 6531_ $$apower systems
000000046 6531_ $$apulse width modulated power converters
000000046 6531_ $$asubspace methods
000000046 6531_ $$atime–frequency analysis
000000046 6531_ $$awavelet transforms
000000046 6531_ $$aWigner distributions
000000046 700__ $$aLobos, T$$uWroclaw University of Technology, Poland
000000046 700__ $$aRezmer, J$$uWroclaw University of Technology, Poland
000000046 8560_ $$fzbigniew.leonowicz@pwr.wroc.pl
000000046 8564_ $$uhttp://zet10.ipee.pwr.wroc.pl/record/46/files/$$zAccess to Fulltext
000000046 909CO $$ooai:zet10.pwr.wroc.pl:46$$pglobal
000000046 980__ $$aARTICLE