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    Wyświetlanie 1-14 z 14
    Tytuł:
    Analiza strat mocy w trójfazowych torach wielkoprądowych
    Analysis of the power losses in the three-phase high-current busducts
    Autorzy:
    Szczegielniak, T.
    Piątek, Z.
    Kusiak, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/376152.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
    Tematy:
    tory wielkoprądowe
    straty mocy
    pole elektromagnetyczne
    Opis:
    Do przesyłu energii elektrycznej o dużych prądach stosuje się m.in. tory wielkoprądowe. W urządzeniach tego typu przepływ prądu wywołuje efekty natury elektromagnetycznej, termicznej oraz dynamicznej. Poprawne wyznaczenie parametrów elektrodynamicznych ma duże znaczenie praktyczne. Podstawą w analizie tych zjawisk jest informacja o rozkładzie pola elektromagnetycznego i stratach mocy, w szczególności zaś gdy straty te stanowią znaczną część całkowitych strat mocy w analizowanej konstrukcji. W artykule przeprowadzono analizę strat mocy w trójfazowych torach wielkoprądowych o przekroju kołowym. Opisano analityczną metodę wyznaczania strat mocy, którą następnie skonfrontowano z metodą numeryczną opartą na metodzie elementów skończonych, zastosowanej w programie FEMM.
    This paper presents an analytical method for determining the power losses in the three-phase gas-insulated transmission line (i.e., high-current busduct) of circular crosssection geometry. The athematical model takes into account the skin effect and the proximity effects, as well as the complete electromagnetic coupling between phase conductors and enclosures (i.e., screens). Apart from analytical calculation, computer simulations for high-current busduct system power losses were also performed with the aid of the commercial FEMM software, using two-dimensional finite elements.
    Źródło:
    Poznan University of Technology Academic Journals. Electrical Engineering; 2015, 81; 63-69
    1897-0737
    Pojawia się w:
    Poznan University of Technology Academic Journals. Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Aspect of the elliptical field in the screened flat three-phase high current busduct. Part I - In the internal area of the screen
    Aspekt pola eliptycznego w ekranowanym płaskim trójfazowym torze wielkoprądowym. Część I - W obszarze wewnętrznym ekranu
    Autorzy:
    Kusiak, D.
    Piątek, Z.
    Szczegielniak, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/376450.pdf
    Data publikacji:
    2012
    Wydawca:
    Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
    Tematy:
    elliptical field
    screened flat three-phase high current busduct
    high current busduct
    external proximity effect
    internal proximity effect
    Opis:
    The paper shown the elliptical magnetic field in the high current screened busduct in the case of the both the external and internal proximity effect. For the characterisation of complex vector values for such a field it is proposed that the length of the longer ellipse semi axis as indicated by the end of the vector within one period be used. Part I describes of elliptic field in the internal area of the screen of the flat three-phase high current busduct.
    W artykule przedstawiono eliptyczne pole magnetyczne występujące w ekranowanym torze wielkoprądowym w przypadku zewnętrznego i wewnętrznego zjawiska zbliżenia. Do charakteryzowania wartości zespolonego wektora takiego pola zaproponowano długość dłuższej półosi elipsy jaką zakreśla koniec tego wektora w ciągu jednego okresu. Część I opisuje pole eliptyczne w obszarze wewnętrznym ekranu trójfazowego płaskiego toru wielkoprądowego.
    Źródło:
    Poznan University of Technology Academic Journals. Electrical Engineering; 2012, 69; 127-134
    1897-0737
    Pojawia się w:
    Poznan University of Technology Academic Journals. Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of the screen thickness on the total magnetic field of a double-pole bifilar high-current busduct
    Autorzy:
    Kusiak, D.
    Piątek, Z.
    Szczegielniak, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/97205.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
    Tematy:
    tubular screen
    high-current busduct
    magnetic field
    tubular conductor
    Opis:
    In the paper shown the impact of the screen thickness on the total magnetic field of a double-pole bifilar line in the screen and its immediate vicinity. The resultant magnetic field in the high-current busduct of this type has two components of different amplitudes and initial phases. As a consequence this field is elliptical. This phenomenon has been described with the formulas relevant to the relative values of the field and the parameters allowing the frequency, conductivity, and the cross-section dimensions of screen. Into account was taken skin, internal and external proximity effects. These phenomena have a strong impact on the magnetic field in the environment of two-conductor shielded highcurrent busduct and should be taken into consideration also for the industrial frequency of phase currents.
    Źródło:
    Computer Applications in Electrical Engineering; 2013, 11; 73-82
    1508-4248
    Pojawia się w:
    Computer Applications in Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of the power losses in the three-phase high-current busducts
    Autorzy:
    Szczegielniak, T.
    Piątek, Z.
    Kusiak, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/97329.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
    Tematy:
    high-current busduct
    power losses
    electromagnetic field
    Opis:
    This paper presents an analytical method for determining the power losses in the three-phase gas-insulated transmission line (i.e., high-current busduct) of circular cross-section geometry. The mathematical model takes into account the skin effect and the proximity effects, as well as the complete electromagnetic coupling between phase conductors and enclosures (i.e., screens). Apart from analytical calculation, computer simulations for high-current busduct system power losses were also performed with the aid of the commercial FEMM software, using two-dimensional finite elements.
    Źródło:
    Computer Applications in Electrical Engineering; 2015, 13; 21-27
    1508-4248
    Pojawia się w:
    Computer Applications in Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of the external proximity effect on the power losses in flat three phase high current busduct
    Autorzy:
    Piątek, Z.
    Szczegielniak, T.
    Kusiak, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/97507.pdf
    Data publikacji:
    2011
    Wydawca:
    Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
    Tematy:
    active power
    reactive power
    Bessel function
    three phase current busduct
    Opis:
    In the paper the influence of the external proximity effect on the active and reactive power in flat three phase high current busduct were presented. Calculations were made using the Poynting theorem and Joule-Lenz law.
    Źródło:
    Computer Applications in Electrical Engineering; 2011, 9; 34-44
    1508-4248
    Pojawia się w:
    Computer Applications in Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Current density in the unscreened three-phase high-current busduct
    Autorzy:
    Szczegielniak, T.
    Piątek, Z.
    Kusiak, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/97582.pdf
    Data publikacji:
    2014
    Wydawca:
    Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
    Tematy:
    analytical method
    high-current busduct
    current density
    Opis:
    Design of the high-current busducts on high currents and voltages causes necessity precise describing of electromagnetic, dynamic and thermal effects. Knowledge of the relations between electrodynamics and constructional parameters is necessary in the optimization construction process of the high-current busducts. Information about distribution electromagnetic field is a base into analysis of electrodynamics and thermal effects in the high-current busducts. The paper presents analytical calculations of the current density in the three-phase high-current busduct which phase conductors are placed in vertex of a square. Into account were taken skin and proximity effect. The electromagnetic field produced by high-current busducts are usually calculated numerically with the use of a computer. However, the analytical calculation of the electromagnetic field is preferable, because it results in a mathematical expression for showing its dependences on various parameters of the line arrangement.
    Źródło:
    Computer Applications in Electrical Engineering; 2014, 12; 57-64
    1508-4248
    Pojawia się w:
    Computer Applications in Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Power losses in the screens of the flat single-pole high-current busduct
    Autorzy:
    Szczegielniak, T.
    Piątek, Z.
    Kusiak, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/97698.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
    Tematy:
    analytical method
    high-current busduct
    electromagnetic field
    power losses
    Opis:
    This paper presents an analytical method for determining the power losses in the screens of the three-phase gas-insulated transmission line (i.e., high-current busduct) of circular crosssection geometry. The mathematical model takes into account the skin effect and the proximity effects, as well as the complete electromagnetic coupling between phase conductors and enclosures (i.e., screens). The power losses produced by high-current busducts are usually calculated numerically with the use of a computer. However, the analytical calculation of the power losses is preferable, because it results in a mathematical expression for showing its dependences on various parameters of the line arrangement. Moreover, knowledge of the relations between electrodynamics and constructional parameters is necessary in the optimization construction process of the high-current busducts.
    Źródło:
    Computer Applications in Electrical Engineering; 2013, 11; 64-72
    1508-4248
    Pojawia się w:
    Computer Applications in Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetic field around the screened three-phase high-current busducts
    Autorzy:
    Szczegielniak, T.
    Piątek, T.
    Kusiak, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/97254.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
    Tematy:
    high current busduct
    magnetic field
    FEMM
    Opis:
    This paper presents an analytical method for determining the magnetic field in the three–phase gas–insulated transmission line (i.e., high-current busduct) of circular cross–section geometry. The mathematical model takes into account the skin effect and the proximity effects, as well as the complete electromagnetic coupling between phase conductors and enclosures (i.e., screens). Apart from analytical calculation, computer simulations for high-current busduct system magnetic field were also performed with the aid of the commercial FEMM software, using two–dimensional finite elements.
    Źródło:
    Computer Applications in Electrical Engineering; 2016, 14; 14-24
    1508-4248
    Pojawia się w:
    Computer Applications in Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Power losses in the screens of the symmetrical three phase high current busduct
    Autorzy:
    Piątek, Z.
    Szczegielniak, T.
    Kusiak, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/97357.pdf
    Data publikacji:
    2012
    Wydawca:
    Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
    Tematy:
    high current busduct
    phase busduct
    Jolule-Lenz law
    Poynting's theorem
    Opis:
    Design of the high current busducts on high currents and voltages causes necessity precise describing of electromagnetic, dynamic and thermal effects. Knowledge of the relations between electrodynamics and constructional parameters is necessary in the optimization construction process of the high current busducts. Information about distribution electromagnetic field and power losses is a base into analysis of electrodynamics and thermal effects in the high current busducts. In the paper using the Poynting theorem and Jolule-Lenz law the active and reactive power in the screens of the symmetrical high current busduct were determined. Into account were taken internal and external proximity effect.
    Źródło:
    Computer Applications in Electrical Engineering; 2012, 10; 69-79
    1508-4248
    Pojawia się w:
    Computer Applications in Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Reverse reaction magnetic field in two-wire high current busduct
    Autorzy:
    Piatek, Z.
    Kusiak, D.
    Szczegielniak, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/97489.pdf
    Data publikacji:
    2010
    Wydawca:
    Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
    Tematy:
    magnetic field
    high-current busduct
    elliptical field
    Opis:
    Work has shown how a reverse reaction magnetic field influences the whole magnetic field within the conductor and its vicinity. A description of this is presented in formulae for relative field values and parameters taking into account frequency, conductivity and diameter of the conductor. This has shown the field to be an elliptical field.
    Źródło:
    Computer Applications in Electrical Engineering; 2010, 8; 53-60
    1508-4248
    Pojawia się w:
    Computer Applications in Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Illustration of the elliptical field in the screened flat 3-phase high current busduct
    Autorzy:
    Kusiak, D.
    Piątek, Z.
    Szczegielniak, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/97732.pdf
    Data publikacji:
    2012
    Wydawca:
    Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
    Tematy:
    high-current busduct
    magnetic fields
    Opis:
    The paper demonstrates the elliptical magnetic field in the flat 3-phase high current screened busduct in the context of the both the external and internal proximity effect. The modules and the amplitudes of the complex components of the magnetic field strength in the high-current busducts of this type are the functions of the two variables: r and Ѳ of the cylindrical coordinate system which subsequently provokes to the conclusion that the harmonic magnetic field in shielded high-current busducts is a rotating elliptical field. For the characterisation of complex vector values for this field, it is suggested that the length of the longer semi axis of an ellipse as showed at the end of the vector within one period should be used. The article presents the elliptic magnetic field in the screen, and the internal and external area of the screen of the flat 3-phase high current busduct.
    Źródło:
    Computer Applications in Electrical Engineering; 2012, 10; 80-97
    1508-4248
    Pojawia się w:
    Computer Applications in Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Power losses in the three-phase gas-insulated line
    Autorzy:
    Szczegielniak, T.
    Kusiak, D.
    Piątek, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/376150.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
    Tematy:
    high-current busduct
    electromagnetic field
    power losses
    Opis:
    This paper presents an analytical method for determining the power losses in the three–phase gas–insulated line (i.e., high-current busduct) of circular cross–section geometry which phase conductors are placed in vertex of a square. The mathematical model takes into account the skin effect and the proximity effects, as well as the complete electromagnetic coupling between phase conductors and enclosures (i.e., screens). The power losses produced by high-current busducts are usually calculated numerically with the use of a computer. However, the analytical calculation of the power losses is preferable, because it results in a mathematical expression for showing its dependences on various parameters of the line arrangement. Moreover, knowledge of the relations between electrodynamics and constructional parameters is necessary in the optimization construction process of the high-current busducts.
    Źródło:
    Poznan University of Technology Academic Journals. Electrical Engineering; 2017, 89; 89-98
    1897-0737
    Pojawia się w:
    Poznan University of Technology Academic Journals. Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetic field of tubular screened phase conductor in a system with grounded or shorted shield
    Autorzy:
    Kusiak, D.
    Piątek, Z.
    Szczegielniak, T.
    Jabłoński, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/97359.pdf
    Data publikacji:
    2014
    Wydawca:
    Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
    Tematy:
    magnetic field
    tubular screen
    tubular conductor
    high-current busduct
    Opis:
    In the paper discusses the influence of grounding or shorting of the screen on the magnetic field of screened phase conductor. This phenomenon has been described with the formulas relevant to the relative values of the field and the parameters allowing the frequency, conductivity, and the cross-section dimensions of screen. Into account was taken skin, internal and external proximity effects. Components of this field were expressed through modified Bessel’s functions as a function r and & of cylindrical coordinates. As a consequence this the magnetic field is a rotating elliptical field.
    Źródło:
    Computer Applications in Electrical Engineering; 2014, 12; 65-81
    1508-4248
    Pojawia się w:
    Computer Applications in Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Calculations of the magnetic field of the three-phase 4-conductor line with rectangular busbars
    Autorzy:
    Kusiak, D.
    Piątek, Z.
    Szczegielniak, T.
    Jabłoński, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1395763.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
    Tematy:
    magnetic field
    rectangular busbar
    high-current busduct
    Opis:
    The paper presents the results of the calculations of the magnetic field for the both shielded and non-shielded 3-phase MR 250 busbar manufactured by Elektromontaż 2 in Katowice, Poland. The busbar magnetic field has been determined by the following methods: analytical method for non–shielded busbar without taking into account the skin and proximity effects, analytical–numerical method based on integral equations, two-dimensional method of finite elements with the use of the commercial FEMM software, measurement method on a test stand. The measurements were performed with the use of a special non-directional magnetic field meter. A satisfactory compliance of the calculations has been obtained.
    Źródło:
    Computer Applications in Electrical Engineering; 2016, 14; 25-38
    1508-4248
    Pojawia się w:
    Computer Applications in Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-14 z 14

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