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Wyszukujesz frazę "charging rate" wg kryterium: Temat


Wyświetlanie 1-2 z 2
Tytuł:
Influence of electric vehicle charging rates on transformer derating in harmonic-rich battery charger applications
Autorzy:
Jouybari-Moghaddam, M.
Alimardani, A.
Hosseinian, S.H.
Powiązania:
https://bibliotekanauki.pl/articles/140829.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
electric vehicle charging
charging rate
power quality
stochastic modeling
transformer derating
Opis:
A study on plug-in electric vehicle (PEV) charging load and its impacts on distribution transformers loss-of-life, is presented in this paper. The assessment is based on residential PEV battery charging. As the exact forecasting of the charging load is not possible, the method for predicting the electric vehicle (EV) charging load is stochastically formulated. With the help of the stochastic model, the effect of fixed, time of use, and real-time charging rates on the charging load and the resultant impact on transformer derating is investigated. A 38-bus test system is adopted as the test system including industrial harmonic sources. Test results demonstrate that uncontrolled EV charging might causes a noticeable change in the K-factor of the transformer, emerging the need for derating, while applying real-time rates for battery charging loads conquers this problem even in case of harmonic-rich chargers.
Źródło:
Archives of Electrical Engineering; 2012, 61, 4; 483-497
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Pre-strain on Hydrogen Embrittlement in Intercritically Annealed Fe-6.5Mn-0.08C Medium-Mn steels
Autorzy:
Kim, Sang-Gyu
Yoon, Young-Chul
Ko, Seok-Woo
Hwang, Byoungchul
Powiązania:
https://bibliotekanauki.pl/articles/2174575.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
medium-manganese steel
hydrogen embrittlement
electrochemical charging
pre-strain
slow strain-rate tensile test
SSRT
Opis:
The present research deals with the effect of pre-strain on the hydrogen embrittlement behavior of intercritically annealed medium-Mn steels. A slow strain-rate tensile test was conducted after hydrogen charging by an electrochemical permeation method. Based on EBSD and XRD analysis results, the microstructure was composed of martensite and retained austenite of which fraction increased with an increase in the intercritical annealing temperature. The tensile test results showed that the steel with a higher fraction of retained austenite had relatively high hydrogen embrittlement resistance because the retained austenite acts as an irreversible hydrogen trap site. As the amount of pre-strain was increased, the hydrogen embrittlement resistance decreased notably due to an increase in the dislocation density and strain-induced martensite transformation.
Źródło:
Archives of Metallurgy and Materials; 2022, 67, 4; 1491--1495
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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