Browsing SINTEF Open by Author "Lesaint, Cedric Michel"

Now showing items 1-9 of 9

    • A novel bench size model coalescer: Dehydration efficiency of AC fields on water-in-crude-oil emulsions 

      Lesaint, Cedric Michel; Berg, Gunnar; Lundgaard, Lars Esben; Ese, Marit-Helen Glomm (Journal article; Peer reviewed, 2016)
      We describe herein the design of a small AC electrostatic model coalescer for investigating coalescence efficiency of water in oil emulsions. The function of the model coalescer is tested on emulsions with different water ...

    • 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 ...

    • 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 ...

    • Compatibility of liquid and solid insulation materials for high voltage subsea connectors 

      Lesaint, Cedric Michel; Hølto, Jorunn; Sæternes, Hans Helmer; Ese, Marit-Helen Glomm (Journal article; Peer reviewed, 2019)
      The main objective of this study is to identify reliable insulation materials and systems for novel AC and DC subsea power connectors for oil and gas exploitation. A combined solid-liquid insulation system might be radically ...

    • Electrocoalescence III : staus and summary report from activities 

      Lundgaard, Lars Esben; Munkejord, Svend Tollak; Reboud, Jean-Luc; Lesaint, Cedric Michel; Ervik, Åsmund; Ese, Marit-Helen Glomm (SINTEF Energi. Rapport;, Research report, 2016)

    • 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 ...

    • STEM-EDS of Inception Sites of Vented Trees in a HV XLPE Subsea Cable 

      Hårberg, Sofie Brandtzæg; Nylund, Inger-Emma; Einarsrud, Mari-Ann; Vullum, Per Erik; Lesaint, Cedric Michel; Hvidsten, Sverre (Chapter, 2023)
      High voltage XLPE cable cores have been subjected to wet ageing following the recommendations in CIGRE TB 722. The electrical ageing was performed at 500 Hz and 10 kV/mm. Vented water trees were detected initiating and ...

    • 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 ...