Zobrazeno 1 - 10
of 16
pro vyhledávání: '"Tomislav Zupan"'
Publikováno v:
IEEE Access, Vol 9, Pp 143295-143306 (2021)
Relevant international instrument transformer standards specify internal arc testing to prove the transformer behavior under internal fault conditions. However, the test is defined in a way that does not recognize that it is possible to limit and red
Externí odkaz:
https://doaj.org/article/a35652254c334e219e7ac0aaeb52675a
The aim of this paper is to present the findings and compare the results of two types of tests, both of which are designed to test the instrument transformer insulation during disconnector operation. The first one is the multiple/endurance chopped te
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f016ac46150d15e39b128b34042e6f09
https://www.bib.irb.hr/1201470
https://www.bib.irb.hr/1201470
Publikováno v:
2021 IEEE Electrical Insulation Conference (EIC).
In order to ensure the withstand capability of the high voltage apparatus against high- frequency transients, multiple chopped impulse test is usually defined. Such tests serve as a basis of replicating in-field phenomena produced by the operation of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::81008366420a662f366bd01ec1cec370
https://doi.org/10.1109/eic49891.2021.9612245
https://doi.org/10.1109/eic49891.2021.9612245
Stray flux in a transformer enters the outer packages of a core perpendicularly and induces significant eddy currents that cause ohmic losses. Local thermal conditions near the core are affected by these losses that are dissipated as heat and can cau
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bf9cdb3c30f11168fa8157511709e412
https://www.bib.irb.hr/1096089
https://www.bib.irb.hr/1096089
Publikováno v:
2019 2nd International Colloquium on Smart Grid Metrology (SMAGRIMET).
During their operation, power transformers are stressed by switching and lightning overvoltages. Transformers that are extensively exposed to these stresses are usually equipped with transformer monitoring system which enables assessing the transform
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::09e87cbf0a09b3c264b6d704faf5606b
https://doi.org/10.23919/smagrimet.2019.8720391
https://doi.org/10.23919/smagrimet.2019.8720391
Autor:
Okan Yurduseven, David R. Smith, Guy Lipworth, Vinay R. Gowda, Tomislav Zupan, Matthew S. Reynolds
Publikováno v:
IEEE Antennas and Wireless Propagation Letters. 15:1865-1868
A scheme for wireless power transfer (WPT) in the radiative near-field (Fresnel) region is presented. The proposed Fresnel WPT scheme is designed to focus microwaves to a diffraction- limited region where a detector can be positioned, achieving reaso
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3803c4854f4d3852e63a54f2951e2a54
https://doi.org/10.1109/lawp.2016.2542138
https://doi.org/10.1109/lawp.2016.2542138
Publikováno v:
2018 First International Colloquium on Smart Grid Metrology (SmaGriMet).
This paper presents a method for Finite-Impulse-Response (FIR) modeling of voltage instrument transformers. The method is based on Wiener filtering and measurement of the transformer response in the frequency domain using a low frequency network anal
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d016ed7684a2185e21ac9f8b78995e80
https://doi.org/10.23919/smagrimet.2018.8369834
https://doi.org/10.23919/smagrimet.2018.8369834
The aim of this research is to develop a physical model useful for measuring the influence of ageing, temperature and water content on the high voltage behavior of oil-paper insulation. The insulation model, made in accordance with the instrument tra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e22382d1ab260964665eed33c5c30ac4
https://www.bib.irb.hr/950823
https://www.bib.irb.hr/950823
Publikováno v:
IEEE Transactions on Magnetics. 51:1-9
The complete electromagnetic-mechanical-thermal modeling approach is demonstrated on the Thomson’s levitating ring experiment. This problem, but with a different set of parameters, was also described by Laithwaite and defined by Freeman and Lowther
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f6d3fd6e427a1d50973490c025b6f0ae
https://doi.org/10.1109/tmag.2014.2370944
https://doi.org/10.1109/tmag.2014.2370944
Publikováno v:
Energies, Vol 17, Iss 6, p 1378 (2024)
A multi-step approach for the fast calculation of the magnetic field inside transformer tank shields, based on the 2D FEM, is presented in the paper. Due to the limitations of the 2D FEM, the proposed approach utilizes several 2D FEM models and calcu
Externí odkaz:
https://doaj.org/article/86d1524cf64d4f8a9687003166844c77