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    Wyświetlanie 1-5 z 5
    Tytuł:
    Statystyczna analiza zmienności obciążeń w sieciach rozdzielczych
    Statistical Analysis of the Load Variability in Distribution Network
    Autorzy:
    Zalewski, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/399172.pdf
    Data publikacji:
    2010
    Wydawca:
    Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
    Tematy:
    analiza statystyczna
    profil obciążeń
    systemy dystrybucji energii
    statistical analysis
    load profiles
    power distribution systems
    Opis:
    This paper presents application statistical analysis to the electrical load modeling clustering of load profiles in different part of system was used to classify the substations. Simulation studies have been performed to demonstrate the efficiency of the proposed scheme and an effect of different parameters on its accuracy on the basis of actual data obtained at distribution system substations. To verify the proposed method of load estimation the measurements of daily energy consumption and daily load at selected distribution substations in Bialystok Power Distribution Utility Co. were made in 365 days. Simulation studies have been performed to demonstrate the efficiency of the proposed scheme and an effect of different parameters on its accuracy on the basis of actual data obtained at distribution system substations.
    Źródło:
    Ekonomia i Zarządzanie; 2010, 2, 4; 206-213
    2080-9646
    Pojawia się w:
    Ekonomia i Zarządzanie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An application of continuous wavelet transform and wavelet coherence for residential power consumer load profiles analysis
    Autorzy:
    Kapler, Piotr
    Powiązania:
    https://bibliotekanauki.pl/articles/2086818.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    residential power consumers
    load profiles
    power demand
    continuous wavelet transform
    wavelet coherence
    odbiorcy energii lokalni
    zapotrzebowanie na energię
    profil obciążenia
    ciągła transformata falkowa
    spójność falkowa
    Opis:
    Load profiles of residential consumers are very diverse. This paper proposes the usage of a continuous wavelet transform and wavelet coherence to perform analysis of residential power consumer load profiles. The importance of load profiles in power engineering and common shapes of profiles along with the factors that cause them are described. The continuous wavelet transform and wavelet coherence has been presented. In contrast with other studies, this research has been conducted using detailed (not averaged) load profiles. Presented load profiles were measured separately on working day and weekend during winter in two urban households. Results of applying the continuous wavelet transform for load profiles analysis are presented as coloured scalograms. Moreover, the wavelet coherence was used to detect potential relationships between two consumers in power usage patterns. Results of coherence analysis are also presented in a colourful plots. The conducted studies show that the Morlet wavelet is slightly better suitable for load profiles analysis than the Meyer’s wavelet. Research of this type may be valuable for a power system operator and companies selling electricity in order to match their offer to customers better or for people managing electricity consumption in buildings.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2021, 69, 1; art. no. e136216, 1--8
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An application of continuous wavelet transform and wavelet coherence for residential power consumer load profiles analysis
    Autorzy:
    Kapler, Piotr
    Powiązania:
    https://bibliotekanauki.pl/articles/2090695.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    residential power consumers
    load profiles
    power demand
    continuous wavelet transform
    wavelet coherence
    odbiorcy energii lokalni
    zapotrzebowanie na energię
    profil obciążenia
    transformata falkowa ciągła
    spójność falkowa
    Opis:
    Load profiles of residential consumers are very diverse. This paper proposes the usage of a continuous wavelet transform and wavelet coherence to perform analysis of residential power consumer load profiles. The importance of load profiles in power engineering and common shapes of profiles along with the factors that cause them are described. The continuous wavelet transform and wavelet coherence has been presented. In contrast with other studies, this research has been conducted using detailed (not averaged) load profiles. Presented load profiles were measured separately on working day and weekend during winter in two urban households. Results of applying the continuous wavelet transform for load profiles analysis are presented as coloured scalograms. Moreover, the wavelet coherence was used to detect potential relationships between two consumers in power usage patterns. Results of coherence analysis are also presented in a colourful plots. The conducted studies show that the Morlet wavelet is slightly better suitable for load profiles analysis than the Meyer’s wavelet. Research of this type may be valuable for a power system operator and companies selling electricity in order to match their offer to customers better or for people managing electricity consumption in buildings.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2021, 69, 1; e136216, 1--8
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Influence of Composite Lay-Up on the Stability of a Structure with Closed Section
    Autorzy:
    Różyło, Patryk
    Dębski, Hubert
    Powiązania:
    https://bibliotekanauki.pl/articles/2022295.pdf
    Data publikacji:
    2022
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    buckling
    composite closed-section profiles
    critical load
    FEM
    Opis:
    This paper presents a study on the stability of a composite structure with a closed section. The research was carried out solely based on numerical simulations using the finite element method. ABAQUS software was used to conduct numerical simulations, which allowed to determine the values of critical loads, as well as the corresponding forms of buckling. As part of the research, the influence of composite material arrangement of layers on the stability of the structure was analyzed. The study was conducted on a composite material, which is a carbon-epoxy composite (CFRP). The obtained research results will be verified in subsequent studies by the results of experimental tests.
    Źródło:
    Advances in Science and Technology. Research Journal; 2022, 16, 1; 260-265
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Influence of Composite Lay-Up and the Shape of the Closed Section on the Stability of the Structure
    Autorzy:
    Czajka, Błażej
    Różyło, Patryk
    Powiązania:
    https://bibliotekanauki.pl/articles/2172346.pdf
    Data publikacji:
    2022
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    buckling
    composite closed-section profiles
    critical load
    FEM
    Opis:
    Stability tests of a thin-walled composite structure with a closed section are presented in this paper. The purpose of this paper is to conduct preliminary studies in the context of numerical simulations of critical and slightly post-buckling states. The tests were conducted based only on numerical simulations by the finite element method. Numerical simulations were conducted using ABAQUS software, which allowed to determine the values of critical loads and their corresponding buckling forms. The influence of layer arrangement on the stability of the structure was studied. Carbon-epoxy laminate (CEL) was used in the tests. It is shown that there are composite lay-ups that show more than 1.3 times higher stiffness than the other cases. The paper demonstrates the dependence of the influence of the arrangement of layers on the stability of the structure, which will provide the basis for planned experimental studies (the results require experimental verification, which will be carried out in subsequent studies).
    Źródło:
    Advances in Science and Technology. Research Journal; 2022, 16, 2; 216--224
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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