Testing of an MgB2 coil for a wind turbine generator pole

Autor: G. Berg, Magne Runde, Risto Mikkonen, Niklas Magnusson, Arne Nysveen, Svein Magne Hellesø, Asger Bech Abrahamsen

Publikováno v: Physica. C, Superconductivity
Magnusson, N, Hellesø, S M, Mikkonen, R, Abrahamsen, A B, Runde, M, Berg, G & Nysveen, A 2021, ' Testing of an MgB 2 coil for a wind turbine generator pole ', Physica C: Superconductivity and its Applications, vol. 587, 1353901 . https://doi.org/10.1016/j.physc.2021.1353901

We report on the testing of a 1 m long and 0.5 m wide racetrack coil wound from 4.5 km of MgB2 tape-shaped superconductors with a copper strip soldered to the nickel matrix. The cross-section of the coil corresponds to what is needed for the field wi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2ec806c6710bf196f0f03d28c2239cdd
https://trepo.tuni.fi/handle/10024/133402

Axial Water Ingress MV XLPE Cable Designs with Watertight Barrier

Autor: Svein Magne Hellesø, Karl Magnus Bengtsson, Knut Brede Liland, Arve Ryen, Sverre Hvidsten

Publikováno v: Proceedings of the Nordic Insulation Symposium.

Humidity can enter the insulation system when the outer sheath of a cable becomes damaged. The relative humidity can then increase above a critical value (70 % RH), facilitating initiation and growth of water trees. The purpose of this experimental a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::531f3f0e021fee0d288bcebd7c9d1875
https://doi.org/10.5324/nordis.v0i23.2489

Fabrication of a scaled MgB2 racetrack demonstrator pole for a 10 MW direct drive wind turbine generator

Autor: Arne Nysveen, Patrick King, Niklas Magnusson, Magne Runde, Jan Christian Eliassen, Asger Bech Abrahamsen, Svein Magne Hellesø, Jarle Bjerkli, Lars-Erik Moslatt

Publikováno v: IEEE transactions on applied superconductivity
Magnusson, N, Eliassen, J C, Abrahamsen, A B, Helleso, S M, Runde, M, Nysveen, A, Moslatt, L-E, Bjerkli, J & King, P 2018, ' Fabrication of a Scaled MgB2 Racetrack Demonstrator Pole for a 10-MW Direct-Drive Wind Turbine Generator ', I E E E Transactions on Applied Superconductivity, vol. 28, no. 4, 5207105 . https://doi.org/10.1109/TASC.2018.2815027

Field windings made of MgB2 wires or tapes are considered for their potential to reduce volume, weight and cost of large offshore wind turbine generators. To gain experience of how to use this relatively new material in full-scale generators, tests o

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ff2a915157b2190c38b203388dbe1aa6
https://hdl.handle.net/11250/2495329

Experimental study of electrocoalescence of water drops in crude oil using near-infrared camera

Autor: Gunnar Berg, Svein Magne Hellesø, Pierre Atten, Lars E. Lundgaard

Publikováno v: Experiments in Fluids

Results are presented concerning the influence of an applied electric field on the coalescence of a water droplet with a much bigger water drop, both drops being immersed in a crude oil. This original study of electrocoalescence in crude oil was perf

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6ee79304de29482345f9dc5a484ebbc5
https://doi.org/10.1007/s00348-015-1990-y

Water tree initiation and growth in XLPE cables under static and dynamic mechanical stress

Autor: Mildrid Selsjord, Sverre Hvidsten, Jan Tore Benjaminsen, Svein Magne Hellesø

Publikováno v: 2012 IEEE International Symposium on Electrical Insulation.

Water treeing is the major aging mechanism in wet-designed cross-linked polyethylene (XLPE) cables causing a reduced lifetime. Several factors affect the initiation and growth of water trees. Without the presence of an electrical field, contaminants

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a07e30bdedbca363a8bfa7c5278b4b8f
https://doi.org/10.1109/elinsl.2012.6251546