ABOUT PREPRINTS
The Preprints collection contains not-yet-published papers and research results obtained at the institute. The collection starts from 2001.
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Preprints

Latest additions:
2014-10-17
11:02
Analysis of SDFT based phase detection system for grid synchronization of distributed generation systems / Chitti Babu, B ; Sridharan, K ; Rosolowski, E ; Leonowicz, Z [http://dx.doi.org/10.1016/j.jestch.2014.07.005] [ENY-PREPRINT-2014-015]
A fast and exact detection of phase and fundamental frequency of grid voltage/current is essential for calculating accurate reference signal in order to implement the control algorithm of inverter-interfaced distributed generation (DG) system and realize precise harmonic compensation. [...]
http://zet10.ipee.pwr.wroc.pl/record/455/files/
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2014-10-17
10:42
Analysis of Recursive DFT Filtering Based Grid Synchronization of Distributed Generation System / Chitti Babu, B ; Sridharan, K ; Rosolowski, E ; Leonowicz, Z [I08/2014/I-069] [ENY-PREPRINT-2014-014]
A converter-interfaced distributed generation (DG) system, like, wind power system, photovoltaic (PV) and micro-turbine-generator system, requires a fast and exact detection of phase and fundamental frequency of grid current in order to implement the control algorithm of power converters by generating reference currents signals. [...]
http://zet10.ipee.pwr.wroc.pl/record/454/files/
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2013-09-18
20:20
Error Compensation in Distance Relays Caused by Wind Power Plants in the Power Grid / Trujillo, L ; Conde, A ; Leonowicz, Z [http://www.sciencedirect.com/science/article/pii/S0378779613002198] [ENY-PREPRINT-2013-013]
This article presents the Prony method as a filtering technique for distance relays. [...]
http://zet10.ipee.pwr.wroc.pl/record/442/files/
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2011-06-24
12:42
Power line fault location using the Complex Space-Phasor and Hilbert-Huang Transform / Bernadić, A ; Leonowicz, Z [I07/2011/I-024] [ENY-PREPRINT-2011-012]
Fault location finding in power system is very important problem in power system monitoring. [...]
http://zet10.ipee.pwr.wroc.pl/record/374/files/
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2010-11-08
17:42
Analysis of Distorted Waveforms in Power Converter Systems / Rezmer, J ; Leonowicz, Z [ENY-PREPRINT-2010-011]
The paper presents a method of determining the frequency developed and based on the Prony model. [...]
http://zet10.ipee.pwr.wroc.pl/record/369/files/
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2009-08-28
18:41
Proceedings of the 8. International Conference on Environment and Electrical Engineering, Karpacz, Poland, 10-13. May 2009 / Schwarz, H ; Leonowicz, Z [ENY-PREPRINT-2009-010]
The aim of the Conference is to promote a Forum, where people involved with electrical power systems may exchange their experiences and present solutions found for actual and future problems. [...]
http://zet10.ipee.pwr.wroc.pl/record/326/files/
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2009-02-21
16:53
Wavelets an Hilbert Transform methods for detection of voltage dips and micro interruptions / Caciotta, M ; Giarnetti, S ; Leccese, F ; Leonowicz, Z ; et al [ENY-PREPRINT-2009-009]
In electrical energy power network, disturbances can cause problems in electronic devices therefore their monitoring is fundamental in Power Quality field both to properly dimension protections and to calculate compensations in case of malfunction of the apparatus. [...]
http://zet10.ipee.pwr.wroc.pl/record/315/files/
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2008-05-22
09:22
Proceedings of the Int. Conference "7th EEEIC International Workshop on Environment and Electrical Engineering" / Schwarz, H ; Janik, P ; Leonowicz, Z ; Lehmann, D [ENY-PREPRINT-2008-008]
http://zet10.ipee.pwr.wroc.pl/record/190/files/
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2008-04-21
22:25
Modelowanie procedur przetwarzania rozproszonego w sieciach informatycznych laboratoriów dydaktycznych / Szymanda, J ; Noszczynski, M [ISBN 978-83-89333-19-3] [ENY-PREPRINT-2008-007]
W referacie przedstawiono adaptację dedykowanego systemu przetwarzania rozproszonego, przeznaczonego do wdrożenia w studenckich laboratoriach-sieciowo komputerowych wydziałów elektrycznych ze szczególnym uwzględnieniem zagadnień z zakresu kursów z cyfrowego przetwarzania sygnałów oraz metod numerycznych w technice. [...]
http://zet10.ipee.pwr.wroc.pl/record/159/files/
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2008-04-21
22:18
Dydaktyczne aspekty projektowania wirtualnego w kształceniu na odległość / Szymanda, J [ISBN 978-83-89333-19-3] [ENY-PREPRINT-2008-006]
W referacie przedstawiono doświadczenia i sugestie dotyczące wprowadzania do programów dydaktycznych elementów kształcenia na odległość (e-learning) w zakresie wspomagania kursów uruchamianych w formie tradycyjnej (blended learning), nazywanych często w polskich przekładach kursami komplementarnymi lub mieszanymi. [...]
http://zet10.ipee.pwr.wroc.pl/record/158/files/
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2008-03-16
20:52
Analysis of Non-Stationary Signals in Power Systems using Wigner Transform and Min-Norm Method / Leonowicz, Z [ENY-PREPRINT-2008-005]
Time-varying spectra of non-stationary time-series commonly used are spectrograms from the Short-Time Fourier Transform (STFT). [...]
http://zet10.ipee.pwr.wroc.pl/record/88/files/
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2008-03-16
20:48
Time-Frequency Analysis of Distorted Electric Signals using a Complex Space-Phasor / Leonowicz, Z [ENY-PREPRINT-2008-004]
We consider applying non-parametric and parametric methods for calculation of time-frequency representation of non-stationary electric waveforms. [...]
http://zet10.ipee.pwr.wroc.pl/record/87/files/
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2008-03-16
20:43
Classification of Electric Signals Based on Time-Frequency Signal Decomposition / Leonowicz, Z [ENY-PREPRINT-2008-003]
A classification procedure based on time-frequency decomposition of the signal is presented. [...]
http://zet10.ipee.pwr.wroc.pl/record/86/files/
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2008-03-11
23:26
Independent Variable Selection: An Application of Independent Component Analysis to Forecasting a Stock Index / Cichocki, A ; Stansell, S R ; Leonowicz, Z ; Buck, J [ENY-PREPRINT-2008-002]
Forecasts of financial time series requires the use of a possibly large set of input (explanatory) variables drawn form a very large set of potential inputs. [...]
http://zet10.ipee.pwr.wroc.pl/record/51/files/
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2008-03-07
23:00
Optimized robust averaging of event-related potentials / Leonowicz, Z ; Karvanen, J ; Shishkin, S [ENY-PREPRINT-2008-001]
Averaging is one of the most commonly used procedures in Neuroscience and is the basic procedure for obtaining event-related potentials (ERP). [...]
http://zet10.ipee.pwr.wroc.pl/record/27/files/
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