166 kW Liquid-Insulated Medium-Frequency Transformer With Hybrid Foil-Litz Windings

Autor: Andrea Cremasco, Daniel Rothmund, Marco Milone, Sudheer Mokkapaty, Elena A. Lomonova

Publikováno v: IEEE Open Journal of Power Electronics, Vol 5, Pp 201-213 (2024)

The safe operation of high-power solid-state transformers (SSTs) in medium-voltage grid-connected applications relies on medium-frequency transformers (MFTs). In MFTs, hybrid foil-litz windings present a cost-effective alternative to litz wire, since

Externí odkaz: https://doaj.org/article/45cff40d52eb4b488b69a9fa13662f2a

Voltage Distribution in the Windings of Medium-Frequency Transformers Operated with Wide Bandgap Devices

Autor: Andrea Cremasco, M. Curti, Elena A. Lomonova, Daniel Rothmund

Publikováno v: IEEE Journal of Emerging and Selected Topics in Power Electronics, 10(4):9373403, 3587-3602. Institute of Electrical and Electronics Engineers
IEEE Journal of Emerging and Selected Topics in Power Electronics

The short rise time observed in the PWM voltages generated by ultrafast wide bandgap devices increases the amplitude of voltage harmonics at higher frequencies. These harmonics can excite the resonances of medium-frequency transformers (MFTs), result

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::552782a0a8b78d8fb982fd40e3f24ee7
http://www.scopus.com/inward/record.url?scp=85102654112&partnerID=8YFLogxK

A Fourier-based Semi-Analytical Model for Foil-Wound Solid-State-Transformers

Autor: Siamak Pourkeivannour, Mitrofan Curti, Coen Custers, Andrea Cremasco, Uwe Drofenik, Elena A. Lomonova

Publikováno v: IEEE Transactions on Magnetics, 58(2):58. Institute of Electrical and Electronics Engineers
IEEE Transactions on Magnetics

A mesh-free semi-analytical Fourier-based method is presented to evaluate the frequency-dependent losses in the windings of solid-state transformers (SSTs) with foil-wound transformers. In the employed diffusion equation, which accounts for induced e

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::672b3c3d430231bea1436ccb6be7d9a1
https://doi.org/10.1109/tmag.2021.3094047

Network modelling of dry-type transformer cooling systems

Autor: Bogdan Cranganu-Cretu, Andreas Blaszczyk, Wei Wu, Andrea Cremasco

Publikováno v: COMPEL - The international journal for computation and mathematics in electrical and electronic engineering. 37:1039-1053

Purpose The application of dry-type transformers is growing in the market because the technology is non-flammable, safer and environmentally friendly. However, the unit dimensions are normally larger and material costs become higher, as no oil is pre

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::565c518ea5662c7124f6c080d171bc2f
https://doi.org/10.1108/compel-12-2016-0534

Thermal Simulations for Optimization of Dry Transformers Cooling System

Autor: Andrea Cremasco, Andreas Blaszczyk, Paolo Di Barba, Wei Wu, Bogdan Cranganu-Cretu

Publikováno v: Scientific Computing in Electrical Engineering ISBN: 9783319303987

An efficient computational model based on principles of thermo-fluid dynamics is crucial for thermal design and optimization of transformers. In this paper we propose a Thermal/Pressure Network (TPN) model of a dry transformer encapsulated in enclosu

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c198f4af89c96b70d6cf05bcfeab8a3e
https://doi.org/10.1007/978-3-319-30399-4_11