Blar i Publikasjoner fra CRIStin - SINTEF Energi på tidsskrift "Proceedings of the Nordic Insulation Symposium"

Viser treff 1-7 av 7

    • AC Breakdown Voltage of 50-Year-Old Service Aged Hydro Power Generator Stator Bars 

      Aakre, Torstein Grav; Ildstad, Erling (Peer reviewed; Journal article, 2022)
      Randomly selected generator bars from a 50-year-old Norwegian hydro power generator were examined in this work. Typical non-destructive tests, as partial discharge and dissipation factor measurements were initially performed ...

    • 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. ...

    • Hybrid Method for Numerical Implementation of Segmented Power Cable Conductors in Finite-element Based Ampacity Calculation 

      Strand, Henrik; Eberg, Espen; Anders, George J. (Peer reviewed; Journal article, 2022)
      This paper addresses challenges with modelling of segmented power cable conductors using finite element analysis (FEA) for ampacity calculation. Segmented conductors improve current distribution by minimizing skin and ...

    • Multi-stress Cyclic Testing of Roebel Stator Bars for Hydropower 

      Eberg, Espen; Kantar, Emre; Aakre, Torstein Grav (Peer reviewed; Journal article, 2022)
      A multi-stress test rig was built to investigate the effect of many start-stops (load cycling) on hydropower generator insulation. To emulate real-life start-stops, stator bars were subjected to accelerated temperature ...

    • Review of Water Treeing in Polymeric Insulated Cables 

      Abideen, Amar; Mauseth, Frank; Hestad, Øystein Leif Gurandsrud; Faremo, Hallvard (Peer reviewed; Journal article, 2022)
      Since discovering the water treeing phenomenon (WT) in polymeric cables in the early 1970s, water treeing has been presumed to be the main cable degradation mechanism for polymeric cables and has been extensively researched ...

    • Streamer Propagation along Profiled Insulator Surfaces under Positive Impulse Voltages 

      Meyer, Hans Kristian Hygen; Marskar, Robert; Bilsbak, Henriette Graverholt; Mauseth, Frank; Schueller, Michael (Peer reviewed; Journal article, 2022)
      Controlling discharge growth on insulator surfaces is important in high voltage gaseous insulation systems. In this study, the effect of small-scale surface profiles on streamer discharge propagation is examined experimentally. ...

    • Use of Data-Driven Approaches for Defect Classification in Stator Winding Insulation 

      Kantar, Emre; Cascallo, Jaume M.; Aakre, Torstein Grav; Thomsen, Nina Marie; Eberg, Espen (Peer reviewed; Journal article, 2022)
      Partial discharges (PD) in the high voltage insulation systems are both a symptom and cause of terminal and impending failures. The use of data-driven methods based on PD measurements will enable predictive strategies to ...