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    Wyświetlanie 1-6 z 6
    Tytuł:
    Harmonic reduction techniques using multi-pulse rectifiers
    Metody redukcji wyższych harmonicznych z wykorzystaniem prostowników multipulsowych
    Autorzy:
    Stawczyk, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/402226.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Świętokrzyska w Kielcach. Wydawnictwo PŚw
    Tematy:
    AC/DC converter
    power quality
    THD (Total Harmonic Distortion)
    autotransformer
    przekształtnik AC/DC
    jakość energii
    współczynnik zawartości harmonicznych
    autotransformator
    Opis:
    AC/DC converters generate high harmonic currents and voltages into the power system, which causes a deformation of their shapes and increases active power losses. This article gives short review about basic methods of reduction of higher harmonics in phase currents of AC/DC converters consisting of parallel connected 6-pulse bridges.
    Źródło:
    Structure and Environment; 2013, 5, 2; 43-47
    2081-1500
    Pojawia się w:
    Structure and Environment
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The influence of the interphase reactor on the operation of 12-pulse AC/DC thyristor rectifier
    Wpływ dławika kojarzącego na pracę tyrystorowego prostownika 12-pulsowego
    Autorzy:
    Stawczyk, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/402479.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Świętokrzyska w Kielcach. Wydawnictwo PŚw
    Tematy:
    AC/DC converter
    power quality
    interphase reactor
    line currents
    controlled rectifiers
    multi-pulse AC/DC converters
    przekształtnik AC/DC
    jakość energii
    dławik kojarzący
    prądy liniowe
    prostowniki sterowane
    multipulsowe przekształtniki AC/DC
    Opis:
    The parallel connection of 6-pulse componnent bridges in the 12-pulse rectifier requires associating inductors. The article presents an analysis of the influence on interphase reactor on the operation of 12-pulse AC/DC thyristor converter. A very important issue is to set the limit value of the load current, at a given firing angle of the thyristors which is working properly.
    Źródło:
    Structure and Environment; 2013, 5, 3; 41-44
    2081-1500
    Pojawia się w:
    Structure and Environment
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    High quality repetitive control system for a grid-tied converter under distorted grid voltage conditions – design and implementation
    Autorzy:
    Ufnalski, Bartlomiej
    Straś, Andrzej
    Grzesiak, Lech M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2173606.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    AC/DC power converter
    current control
    particle swarm optimization
    power quality
    repetitive control
    RC
    przetwornica mocy AC/DC
    kontrola prądu
    optymalizacja roju cząstek
    jakość prądu
    kontrola powtarzalna
    Opis:
    The paper features a grid-tied converter with a repetitive current controller. Our goal here is to demonstrate the complete design workflow for a repetitive controller, including phase lead, filtering and conditional learning. All key parameters, i.e., controller gain, filter and fractional phase lead, are designed in a single optimization procedure, which is a novel approach. The description of the design and optimization process, as well as experimental verification of the entire control system, are the most important contributions of the paper. Additionally, one more novelty in the context of power converters is verified in the physical system – a conditional learning algorithm to improve transient states to abrupt reference and disturbance changes. The resulting control system is tested experimentally in a 10 kW converter.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2021, 69, 2; art. no. e136739
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    High quality repetitive control system for a grid-tied converter under distorted grid voltage conditions – design and implementation
    Autorzy:
    Ufnalski, Bartlomiej
    Straś, Andrzej
    Grzesiak, Lech M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2090719.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    AC/DC power converter
    current control
    particle swarm optimization
    power quality
    repetitive control
    RC
    przetwornica mocy AC/DC
    kontrola prądu
    optymalizacja roju cząstek
    jakość prądu
    kontrola powtarzalna
    Opis:
    The paper features a grid-tied converter with a repetitive current controller. Our goal here is to demonstrate the complete design workflow for a repetitive controller, including phase lead, filtering and conditional learning. All key parameters, i.e., controller gain, filter and fractional phase lead, are designed in a single optimization procedure, which is a novel approach. The description of the design and optimization process, as well as experimental verification of the entire control system, are the most important contributions of the paper. Additionally, one more novelty in the context of power converters is verified in the physical system – a conditional learning algorithm to improve transient states to abrupt reference and disturbance changes. The resulting control system is tested experimentally in a 10 kW converter.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2021, 69, 2; e136739, 1--11
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Design and construction of a polygon-connected autotransformer-based 36-pulse AC-DC converter for power quality improvement in retrofit applications
    Autorzy:
    Abdollahi, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/202052.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    AC-DC converter
    polygon autotransformer
    power quality
    36-pulse rectifier
    direct torque controlled induction motor drive (DTCIMD)
    konwerter AC-DC
    jakość energii
    prostownik impulsowy
    DTCIMD
    Opis:
    This paper presents the design and analysis of a polygon connected autotransformer based 36-phase AC-DC converter which supplies direct torque controlled induction motor drives (DTCIMD’s) in order to have better power quality conditions at the point of common coupling. The proposed converter output voltage is accomplished via two paralleled eighteen-pulse AC-DC converters each of them consisting of nine-phase diode bridge rectifier. An autotransformer is designed to supply the rectifier. The design procedure of magnetics is in a way such that makes it suitable for retrofit applications where a six-pulse diode bridge rectifier is being utilized. The proposed structure improves power quality criteria at ac mains and makes them consistent with the IEEE-519 standard requirements for varying loads. Furthermore, near unity power factor is obtained for a wide range of DTCIMD operation. A comparison is made between 6-pulse and proposed converters from view point of power quality indices. Results show that input current total harmonic distortion (THD) is less than 4% for the proposed topology at variable loads. A laboratory prototype of the proposed Polygon-Connected autotransformer-based 36-pulse AC-DC converter is developed and test results are presented to validate the developed design procedure and the simulation models of this AC-DC converter under varying loads.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2015, 63, 2; 353-362
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Study of delta/polygon-connected transformer-based 36-pulse ac-dc converter for power quality improvement
    Autorzy:
    Abdollahi, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/140490.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    jakość energii
    prostownik 36-pulsowy
    bezpośredni moment obrotowy silnika indukcyjnego sterowanego napędem
    AC-DC converter
    delta/polygon transformer
    power quality
    direct torque controlled induction motor drive (DTCIMD)
    Opis:
    Design of a delta/polygon-connected autotransformer based 36-pulse ac-dc converter is presented in this paper. The 36-pulse topology is obtained via two paralleled eighteen-pulse ac-dc converters each of them consisting of a nine-phase (nine-leg) diode bridge rectifier. For independent operation of paralleled diode-bridge rectifiers, two interphase transformers (IPT) is designed and implemented. A transformer is designed to supply the rectifier. The design procedure of magnetics is in a way such that makes it suitable for retrofit applications where a six-pulse diode bridge rectifier is being utilized. The proposed structure has been implemented and simulated using Matlab/Simulink software under different load conditions. Simulation results confirmed the significant improvement of the power quality indices (consistent with the IEEE-519 standard requirements) at the point of common coupling. Furthermore, near unity power factor is obtained for a wide range of DTCIMD operation. A comparison is made between 6-pulse and proposed converters from view point of power quality indices. Results show that input current total harmonic distortion (THD) is less than 4% for the proposed topology at variable loads.
    Źródło:
    Archives of Electrical Engineering; 2012, 61, 2; 277-292
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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