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Wyszukujesz frazę "Łukowicz, M." wg kryterium: Autor


Wyświetlanie 1-3 z 3
Tytuł:
Location of arc faults on power transmission lines
Autorzy:
Pustułka, M
Iżykowski, J
Łukowicz, M
Powiązania:
https://bibliotekanauki.pl/articles/410527.pdf
Data publikacji:
2013
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
arc fault
fault location
signal processing
Opis:
This paper presents a fault location algorithm, which allows to determine the distance to a fault and fault resistance, as a result of considering natural fault loops. It is assumed that three-phase voltages and currents from both ends of the line measured asynchronously are the input signals of the fault locator. In case of the availability of synchronized measurements the elements associated with the determination of the synchronization angle should be omitted. In addition to natural fault loop signals also use of symmetrical components (positive and negative or incremental positive sequence components) to fault location were considered as well.
Źródło:
Present Problems of Power System Control; 2013, 3; s. 95-102
2084-2201
Pojawia się w:
Present Problems of Power System Control
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Neural network filtration for arc faults location on power transmission lines
Autorzy:
Pustułka, M.
Iżykowski, J.
Łukowicz, M.
Powiązania:
https://bibliotekanauki.pl/articles/410589.pdf
Data publikacji:
2013
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
arc fault
fault location
signal processing
filtration
Opis:
This paper presents filtration using neural network for arc fault location, which allows to determine the distance to a fault, as a result of considering natural fault loops. It is assumed that three-phase voltages and currents from both ends of the line are the input signals of the fault locator and naturally of the neutral network applied for filtering the input signals. In addition to natural fault loop signals also use of symmetrical components (positive and negative or incremental positive sequence components) to fault location were considered as well. Results of evaluation study have been included, analyzed and discussed. Influence of filtration has been also considered.
Źródło:
Present Problems of Power System Control; 2013, 4; 37-49
2084-2201
Pojawia się w:
Present Problems of Power System Control
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimization Of Current Magnitude Estimators Based On Marquardt-Levenberg Algorithm
Autorzy:
Łukowicz, M.
Solak, K.
Wicher, P.
Wiecha, B.
Powiązania:
https://bibliotekanauki.pl/articles/410595.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
signal processing
digital filter
magnitude estimator
high speed overcurrent relay
Opis:
Digital filtering, correlation methods, time delay methods, signal differentiation are the most commonly used methods of estimating fundamental frequency orthogonal components utilized in magnitude estimators. The foundation for designing filters used in aforementioned methods are usually demanded frequency responses or signal models with their parameters to be estimated. A weak point of both approaches is frequency-domain modelling ignoring time-domain performance of the magnitude estimators. In order to fulfil the requirements of protection with the optimum speed for many different configurations, operating conditions and construction features of power systems, it is necessaiy to develop magnitude estimator design methods aimed at modelling with respect to highspeed response with simultaneous acceptable estimation accuracy in the steady state. The article discusses the implementation of Levenberg-Marquardt algorithm to optimization of current magnitude estimators designed for power system protection with the focus on estimators used in instantaneous overcurrent relays. The paper presents details of optimizing algorithm, power system model used for acquisition of signal patterns and estimator performance analyzes.
Źródło:
Present Problems of Power System Control; 2016, 7; 5-17
2084-2201
Pojawia się w:
Present Problems of Power System Control
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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