Elektrotechnik TU Wroclaw

Elektrotechnik TU Wroclaw 7 Datensätze gefunden  Die Suche hat 0.03 Sekunden gedauert. 
1. Comparison between DFT, Adaptive Window DFT and EDFT for Power Quality Frequency Spectrum Analysis / Grossoni, M ; Giarnetti, S ; Leccese, F ; Leonowicz, Z [DOI: 10.13140/2.1.3741.1849] [ENY-ARTICLE-2010-292]
Spectral leakage and picket-fence effects associated with the system fundamental frequency variation and improperly selected sampling time window prevents a direct application of the DFT algorithm with a constant sampling rate. [...]
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2. Analysis of power quality disturbances using the S-Transform / Leonowicz, Z ; Lobos, T ; Wozniak, K [I07/2007/I-009] [ENY-ARTICLE-2008-111]
The method presented in this paper employs recently introduced S-transform which is an important development of STFT with improved properties. [...]
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3. Parametric Spectral Estimation for Power Quality Assessment / Leonowicz, Z ; Lobos, T [1-4244-0813-X/07/$20.00 2007 IEEE] [ENY-ARTICLE-2008-025]
The authors show that the use of highresolution spectrum estimation methods instead of Fourier-based techniques can improve the accuracy of measurement of spectral parameters of distorted waveforms encountered in power systems, in particular the estimation of the power quality indices (such as harmonic and interharmonic groups and subgroups). [...]
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4. Parametric methods for time-frequency analysis of electric signals / Leonowicz, Z [ISSN 0324-945x] [ENY-BOOK-2008-001]
The author presents a new approach to spectral analysis of electric signals and related problems encountered in power systems. [...]
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5. Application of higher-order spectra for signal processing in electrical power engineering / Lobos, T ; Leonowicz, Z ; Szymanda, J ; Ruczewski, P [ENY-ARTICLE-2008-004]
In power spectrum estimation, the signal under consideration is processed in such a way, that the distribution of power among its frequency is estimated and phase relations between the frequency components are suppressed. [...]
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6. Advanced Spectrum Estimation Methods for Signal Analysis in Power Electronics / Leonowicz, Z ; Lobos, T ; Rezmer, J [ENY-ARTICLE-2008-003]
Modern frequency power converters generate a wide spectrum of harmonics components. [...]
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7. Analysis of non-stationary signals in power systems / Leonowicz, Z [ENY-ARTICLE-2008-002]
Classical techniques to estimate the spectrum of the multi-component signal are based on Fourier-based transformations. [...]
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