Browsing SINTEF Open by Author "Magnusson, Niklas"

Now showing items 1-16 of 16

    • Apparatus for loss measurements under multidirectional and dc-bias flux in electrical steel laminations 

      Wang, Wei; Nysveen, Arne; Magnusson, Niklas (Peer reviewed; Journal article, 2020)
      Conventional standardized power loss measurements for electric steels are performed at flux densities with a single sinusoidal and unidirectional excitation. However, the flux inside electrical steel laminations can deviate ...

    • Cavities in Mass-Impregnated HVDC Subsea Cables Studied by AC Partial Discharge Measurements 

      Runde, Magne; Kvien, Oddgeir; Førster, Horst H.; Magnusson, Niklas (Journal article; Peer reviewed, 2019)
      Partial discharge measurements have been used for studying shrinkage voids in the insulation of mass-impregnated high voltage DC subsea power cables. Three 4.5-m long cable samples were subjected to ac partial discharge ...

    • Common and differential mode of dc-bias in three-phase power transformers 

      Wang, Wei; Nysveen, Arne; Magnusson, Niklas (Peer reviewed; Journal article, 2022)
      Dc magnetization due to the geomagnetically induced currents (GICs) and HVDC (High Voltage Direct Current) systems may cause core saturation and result in serious destruction in the transformer performance as well as the ...

    • Comparison of Levelized Cost of Energy of superconducting direct drive generators for a 10 MW offshore wind turbine 

      Abrahamsen, Asger B; Liu, Dong; Magnusson, Niklas; Thomas, Arwyn Sean; Azar, Ziad; Stehouwer, Ewoud; Hendriks, Ben; Zinderen, Gerrit Jan Van; Deng, Fujin; Chen, Zhe; Karwatzki, Dennis; Mertens, Axel; Parker, Max Alexander; Finney, Stephen Jon; Polinder, Henk (Journal article; Peer reviewed, 2018)
      A method for comparing the Levelized Cost of Energy (LCoE) of different superconducting drive trains is introduced. The properties of a 10 MW MgB$_{2}$ superconducting direct drive generator are presented in terms weight ...

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

      Magnusson, Niklas; Eliassen, J. C.; Abrahamsen, Asger B; Hellesø, Svein Magne; Runde, Magne; Nysveen, Arne; Moslått, Lars-Erik; Bjerkli, Jarle; King, Patrick (Journal article; Peer reviewed, 2018)
      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 ...

    • How to Plug In the Fishing Fleet: Connectors in charging infrastructure for small fishing boats 

      Mehammer, Eirill Bachmann; Strand, Henrik; Magnusson, Niklas; Solheim, Kristian Thinn; Eberg, Espen (Peer reviewed; Journal article, 2023)
      Fishing fleets are targeted for electrification in many parts of the world. These vessels represent a large potential for emission reductions by transitioning from fossil to hybrid and electric propulsion. However, a massive ...

    • Hysteresis losses in MgB2 superconductors exposed to combinations of low AC and high DC magnetic fields and transport currents 

      Magnusson, Niklas; Abrahamsen, A.B.; Liu, D; Runde, Magne; Polinder, Henk (Peer reviewed; Journal article, 2014)
      MgB2 superconductors are considered for generator field coils for direct drive wind turbine generators. In such coils, the losses generated by AC magnetic fields may generate excessive local heating and add to the thermal ...

    • The influence of multidirectional leakage flux on transformer core losses 

      Wang, Wei; Nysveen, Arne; Magnusson, Niklas (Peer reviewed; Journal article, 2021)
      In a power transformer, the leakage flux enters the laminations of the iron core in different directions. Depending on the orientation of the leakage flux, it can add eddy current and hysteresis losses to the well-documented ...

    • Internal pressures and pressure gradients in mass-impregnated HVDC cables during current cycling 

      Runde, Magne; Jonsson, Erik; Magnusson, Niklas; Solheim, Kristian Thinn (Peer reviewed; Journal article, 2020)
      The internal pressures in the insulation of two 5-m long pieces of a state-of-the art mass-impregnated non-draining subsea cable have been measured under load current cycling at ambient temperatures ranging from 3 to 37 ...

    • MgB2-Based MVDC Superconducting Power Cable in Liquid Hydrogen for Hybrid Energy Distribution 

      Bruzek, Christian-Eric; Spina, Tizana; Melaccio, Umberto; Tropeano, Matteo; Marian, Adela; Morandi, Antonio; Gomory, Fedor; Kováč, Pavol; Reiser, Wolfgang; Hole, Stephane; Lallouet, Nicolas; Iannaccone, Tommaso; Roudaut, Julien; Magnusson, Niklas (Peer reviewed; Journal article, 2024)
      The combination of liquid hydrogen and superconducting cables presents a unique opportunity to distribute both hydrogen and bulk electricity in the same infrastructure. In particular, liquid hydrogen around 20 K is ideally ...

    • Modelling of Internal Pressure Dynamics in Mass-Impregnated Non-Draining HVDC Cables 

      Hestad, Øystein Leif Gurandsrud; Runde, Magne; Enoksen, Henrik; Magnusson, Niklas (Peer reviewed; Journal article, 2022)
      Changing the current loading of mass-impregnated non-draining power cables causes the pressure in the insulation to vary over a wide range. It is generally recognized that under certain conditions—typically after a large ...

    • MVDC MgB2 superconducting cables for hybrid power transmission 

      Bruzek, Christian-Eric; Spina, Tizana; Melaccio, Umberto; Tropeano, Matteo; Grasso, Gianni; Marian, Adela; Morandi, Antonio; Gomory, Fedor; Kováč, Pavol; Reiser, Wolfgang; Hole, Stephane; Combessis, Bruno; Lallouet, Nicolas; Sodiro, Bruno; Roudaut, Julien; Bouvier, Gregory; Magnusson, Niklas (Chapter, 2023)
      Combining liquid hydrogen and superconducting cables presents a unique opportunity for a more decarbonized world. The European project SCARLET has been launched to demonstrate inter alia the feasibility of an MVDC hybrid ...

    • Optimization and comparison of superconducting generator topologies for a 10 MW wind turbine application 

      Liu, Dong; Polinder, Henk; Abrahamsen, Asger B; Stehouwer, Ewoud; Hendriks, Ben; Magnusson, Niklas (Journal article; Peer reviewed, 2017)

    • SCARLET – A European Effort to Develop HTS and MgB2 Based MVDC Cables 

      Magnusson, Niklas; Allais, Arnaud; Angeli, Giuliano; Bouvier, Gregory; Bruzek, Christian-Eric; Candido, José; Creusot, Christophe; Gammelsæter, Marte; Garofalo, Erik; Gomory, Fedor; Hodge, Eoin; Hole, Stephane; Marian, Adela; Morandi, Antonio; Reiser, Wolfgang; West, Beate (Peer reviewed; Journal article, 2023)
      Superconducting cables have been proven in a variety of pilot projects and utility installations, demonstrating several of their advantages, including compact size and low energy losses, which can make the technology ...

    • Superconducting Cables for Europe’s Energy Transition 

      Marian, Adela; Allais, Arnaud; Bruzek, Christian-Eric; Creusot, Christophe; Magnusson, Niklas (Chapter, 2023)
      SCARLET, “Superconducting CAbles foR sustainabLe Energy Transition”, is a new Horizon Europe project funded for a duration of 4.5 years. The goal of the project is to develop and industrially manufacture superconducting ...

    • Testing of an MgB2 coil for a wind turbine generator pole 

      Magnusson, Niklas; Hellesø, Svein Magne; Mikkonen, R.; Abrahamsen, A.B.; Runde, Magne; Berg, Gunnar; Nysveen, Arne (Peer reviewed; Journal article, 2021)
      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 ...