Blar i SINTEF Open på forfatter "Liland, Knut Brede"

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    • Absorption of water in silicon gel 

      Lesaint, Cedric Michel; Babault, Celine; Liland, Knut Brede; Lundgaard, Lars Esben (Chapter; Peer reviewed, 2014)
      Water is an important enemy of an electric insulation system. Water vapour can be absorbed by electrical insulation materials (liquids or solid) and migrate in between the materials to achieve the same relative humidity ...

    • Blister Test as Method of Measuring Adhesion of Solids on a Flat Surface 

      Liland, Knut Brede; Faremo, Hallvard; Furuheim, Knut-Magne (Journal article; Peer reviewed, 2019)
      The adhesion between coating and a flat metal surface has been investigated by measurements. The setup is based on the formation of a blister by injecting nitrogen gas under pressure between the coating and the substrate. ...

    • Comparison between synthetic ester and mineral oil impregnated transformer paper aging markers 

      Liland, Knut Brede; Linhjell, Dag; Lesaint, Cedric Michel; Ese, Marit-Helen Glomm; Lundgaard, Lars Esben; Mavrommatis, Pascal; Stjepanovic, Nenad Miroljub (Proceedings of IEEE International Conference on Dielectric Liquids;, Chapter; Peer reviewed, 2017)
      For transformers in service, aging markers from cellulose in oil such as furans, water, methanol and acids are measured for diagnostic purposes. The content of these indicators, measured in oil, may therefore vary with ...

    • Electric Field Enhancement Control in Active Junction of IGBT Power Module 

      Abdelmalik, Abdelghaffar Amoka; Liland, Knut Brede (Peer reviewed; Journal article, 2020)
      Dielectric liquids are incompressible, able to fill voids and have selfhealing effect and hence are being considered as alternative encapsulation materials to establish power electronics at ambient high pressure at subsea ...

    • Formation of micro-cracks at the surface of a high voltage cable screen induced by aluminum corrosion 

      Lesaint, Cedric Michel; Liland, Knut Brede; Mermigkas, Athanasios; Klusmeier, Katharina Kuhlefelt; Kantar, Emre; Hvidsten, Sverre; Hestad, Øystein Leif Gurandsrud (Chapter; Peer reviewed, 2023)
      The main purpose of this study is to investigate the adhesion between corroded aluminium conductor strands and the semi-conductive cable screen. In this paper it is proposed that increased adhesion is one of the pre-requisites ...

    • Liquid insulation of IGBT modules: Long term chemical compatibility and high voltage endurance testing 

      Liland, Knut Brede; Lesaint, Cedric Michel; Lundgaard, Lars Esben; Hernes, Magnar; Glomm, Wilhelm (Chapter; Peer reviewed, 2016)
      To facilitate operation of power electronics for subsea operation at ambient pressure components have to be submerged in a liquid. Equipment and schemes for testing of long term properties have been developed. Several ...

    • Transformer Windings Ageing, diagnosis and asset management. Version 4 

      Lundgaard, Lars Esben; Liland, Knut Brede; Linhjell, Dag; Susa, Dejan; Ese, Marit-Helen; Selsbak, Cecilie Mørk; Kes, M; Lesaint, Cedric Michel (SINTEF Energi. Rapport;TR A7099, Research report, 2015)
      This report addresses state of the art in the field of transformer ageing and diagnostics, with emphasis on advising end-users on transformer asset management and on transformer specification. The basis is results from two ...