Electrical Engineering Wroclaw University of Technology

Electrical Engineering Wroclaw University of Technology 70 records found  beginprevious21 - 30nextend  jump to record: Search took 0.02 seconds. 
21. Power quality evaluation using advanced spectrum estimation methods / Leonowicz, Z ; Lobos, T [I07/2006/I-082] [ENY-ARTICLE-2008-174]
The authors show that the use of high-resolution 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 inter/harmonic groups and subgroups) . [...]
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22. Analysis of influence of power quality disturbances using a neuro-fuzzy systems / Janik, P ; Leonowicz, Z ; Lobos, T ; Waclawek, Z [RZ I07/2007/I-025] [ENY-ARTICLE-2008-172]
The authors propose an automated neuro-fuzzy system approach (with neural network subsystem) to power quality assessment incorporating equipment susceptibility patterns. [...]
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23. Wavelets and Prony Method for Disturbance Detection in Wind Farms / Lobos, T ; Rezmer, J ; Janik, P ; Amaris, H ; et al [ENY-ARTICLE-2008-155]
Wind generator impact on power quality is crucial for power system operation. [...]
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24. Echtzeitberechnung der modalen Drehstromkomponenten nach plötzlichen Zustandsänderungen / Hosemann, G ; Schneider, E ; Lobos, T [I08/1987/I-409] [ENY-ARTICLE-2008-119]
Zur schnellen digitalen Ermittlung der Modalkomponenten in Drehstromsystemen werden in des Regel nichtrekursive Filterverfahren verwendet. [...]
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25. Time-Frequency Representation for Non-Stationary Phenomena in Electrical Engineering / Sikorski, T ; Ruczewski, P ; Lobos, T [I07/2004/I-018] [ENY-ARTICLE-2008-118]
The paper introduces two-dimensional method of observation and diagnosis of non-stationary signals in electrical engineering. [...]
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26. Measurement of IEC Groups and Subgroups Using Advanced Spectrum Estimation Methods / Bracale, A ; Carpinelli, G ; Leonowicz, Z ; Lobos, T ; et al [ENY-ARTICLE-2008-117]
The International Electrotechnical Commission (IEC) standards characterize the waveform distortions in power systems with the amplitudes of harmonic and interharmonic groups and subgroups. [...]
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27. Neural networks for real-time estimation of the basic waveforms of voltages and currents encountered in power systems / Cichocki, A ; Lobos, T [I07/1993/I-141] [ENY-ARTICLE-2008-116]
An electronic artificial neural network architecture is presented for estimating the parameters of a sine wave distorted by a DC exponential signal and corrupted by noise. [...]
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28. 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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29. Analysis of nonstationary electric signals using the S-transform. Zastosowanie transformaty S do analizy sygnałów niestacjonarnych w elektrotechnice / Leonowicz, Z ; Lobos, T ; Wozniak, K [I07/2005/I-018] [ENY-ARTICLE-2008-110]
Contemporary power systems, which contain a considerable number of non-linear loads, require advanced methods of spectral analysis for their investigation and control. [...]
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30. Analysis of three-phase chopper circuits controlled by asymmetrical firing of thyristors / Lobos, T ; Wordoffa, A [I08/1987/I-411] [ENY-ARTICLE-2008-109]
Using thyristor and thyristor-diode ac choppers causes distortion of currents and voltages in electrical power networks. [...]
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