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Showing results 1-40 of 40

2022
1 Berg, Gunnar; Eberg, Espen; Aakre, Torstein Grav; Ildstad, Erling; Kantar, Emre; Nysveen, Arne.
HydroStator : hovedfunn og resultater i KPN-prosjektet HydroStator. Trondheim: SINTEF Energi AS 2022 (ISBN 978-82-14-07529-8) 19 p. SINTEF Rapport(2022:00275)
NTNU ENERGISINT Untitled
 
2 Eberg, Espen; Meyer, Hans Kristian Hygen; Foros, Jørn; Berg, Gunnar; Tveten, Erlend Grytli; Aakre, Torstein Grav; Gillund, Astri.
Transformatorgjennomføringer - tilstandskontroll og anbefalinger. Oslo: NVE 2022 (ISBN 978-82-410-2239-5) 20 p. NVE Ekstern rapport(15/2022)
ENERGISINT Untitled
 
2021
3 Langåker, Helge-Andre; Kjerkreit, Håkon; Syversen, Christoffer Lie; Moore, Richard J.D.; Holhjem, Øystein Hov; Jensen, Irene Anite; Morrison, Aiden J; Transeth, Aksel Andreas; Kvien, Oddgeir; Berg, Gunnar; Olsen, Thomas; Hatlestad, Alexander; Negård, Thomas; Broch, Rolf; Johnsen, Jørn E.
An autonomous drone-based system for inspection of electrical substations. International Journal of Advanced Robotic Systems (IJARS) 2021 ;Volume 18.(2)
SINTEF ENERGISINT Untitled
 
4 Magnusson, Niklas; Hellesø, Svein Magne; Mikkonen, R.; Abrahamsen, A.B.; Runde, Magne; Berg, Gunnar; Nysveen, Arne.
Testing of an MgB<inf>2</inf> coil for a wind turbine generator pole. Physica. C, Superconductivity 2021 ;Volume 587. p. 1-7
ENERGISINT NTNU Untitled
 
5 Transeth, Aksel Andreas; Moore, Richard; Holhjem, Øystein Hov; Morrison, Aiden J; Kvien, Oddgeir; Berg, Gunnar.
Autonome droner for ekstern inspeksjon på høyspennings elektriske transformatorstasjoner. De viktigste teknologiske krav for trygg og sikker bruk av droner innen UAM; 2021-04-29 - 2021-04-29
SINTEF ENERGISINT Untitled
 
2020
6 Berg, Gunnar; Eberg, Espen; Hvidsten, Sverre.
Partial Discharge Characterisation of Stator Windings Taken from a 50-year-old Norwegian Hydrogenerator. I: 2019 IEEE Electrical Insulation Conference - EIC. IEEE 2020 ISBN 978-1-5386-7624-0. p. 168-171
ENERGISINT Untitled
 
7 Transeth, Aksel Andreas; Moore, Richard; Morrison, Aiden J; Jensen, Irene Anite; Holhjem, Øystein Hov; Berg, Gunnar; Kvien, Oddgeir.
Residente droner krever mest testing. Teknisk Ukeblad [Business/trade/industry journal] 2020-08-25
ENERGISINT SINTEF Untitled
 
2018
8 Berg, Gunnar.
Tilstandskontroll av krafttransformatorer - feildeteksjon og diagnosemetoder. Oslo: Energi Norge AS 2018 (ISBN 978-82-436-1050-7) 48 p. Publikasjon (Energi Norge)(431-2018)
ENERGISINT Untitled
 
9 Eberg, Espen; Aakre, Torstein Grav; Berg, Gunnar; Hvidsten, Sverre.
Comparison of Offline VLF PD Measurements and Online PD Measurements on a 50-Year-Old Hydrogenerator Stator in Norway. I: 2018 IEEE Electrical Insulation Conference - EIC. IEEE conference proceedings 2018 ISBN 978-1-5386-4178-1. p. 542-546
ENERGISINT NTNU Untitled
 
2016
10 Lesaint, Cedric Michel; Berg, Gunnar; Lundgaard, Lars Esben; Ese, Marit-Helen Glomm.
A novel bench size model coalescer: Dehydration efficiency of AC fields on water-in-crude-oil emulsions. IEEE transactions on dielectrics and electrical insulation 2016 ;Volume 23.(4) p. 2015-2020
ENERGISINT Untitled
 
2015
11 Hellesø, Svein Magne; Atten, Pierre; Berg, Gunnar; Lundgaard, Lars Esben.
Experimental study of electrocoalescence of water drops in crude oil using near-infrared camera. Experiments in Fluids 2015 ;Volume 56.(122)
ENERGISINT Untitled
 
2013
12 Lesaint, Cedric Michel; Simon, Sebastien Charles; Lesaint, Caterina; Glomm, Wilhelm; Berg, Gunnar; Lundgaard, Lars Esben; Sjøblom, Johan.
Dielectric Properties of Asphaltene Solutions: Solvency Effect on Conductivity. Energy & Fuels 2013 ;Volume 27.(1) p. 75-81
ENERGISINT NTNU Untitled
 
2012
13 Berg, Gunnar; Sæternes, Hans Helmer; Aakervik, Jørund; Hvidsten, Sverre.
The effect of hydrostatic pressure on electrical treeing in silicone cable joints. I: Conference Record of the 2012 IEEE International Symposium on Electrical Insulation. IEEE conference proceedings 2012 ISBN 978-1-4673-0486-3. p. 609-612
ENERGISINT Untitled
 
2011
14 Aakervik, Jørund; Berg, Gunnar; Hvidsten, Sverre.
Design of a High Voltage Penetrator for High Pressure and Temperature Laboratory Testing. Conference on Electrical Insulation and Dielectric Phenomena. Annual Report 2011 p. 267-270
ENERGISINT Untitled
 
15 Kvien, Oddgeir; Berg, Gunnar; Hvidsten, Sverre.
Material erosion and build-up at the high voltage electrode during PD testing of subsea insulation materials using a modified Cigré II test method. Conference on Electrical Insulation and Dielectric Phenomena. Annual Report 2011 p. 448-451
ENERGISINT Untitled
 
2009
16 Hølto, Jorunn; Berg, Gunnar; Lundgaard, Lars Esben.
Electrocoalescence of Drops in a Water-in Oil Emulsion. I: 2009 Annual Report Conference on Electrical Insualtion and Dielectric Phenomena. : IEEE Conference Proceedings 2009 ISBN 9781424445592. p. 196-199
ENERGISINT Untitled
 
17 Susa, Dejan; Lundgaard, Lars Esben; Berg, Gunnar; Mjelve, Asgeir.
Power transformer on-line multi-gas monitoring system. I: Proceedings of the 21th Nordic Insulation Symposium : Nord-IS 09 : June 15-17, 2009, Gothenburg, Sweden. Gothenburg, Sweden: Chalmers University of Technology 2009 ISBN 978-91-633-4880-8. p. 271-274
ENERGISINT Untitled
 
2008
18 Kvien, Oddgeir; Berg, Gunnar; Hølto, Jorunn.
Partial discharge testing of subsea insulation materials development of testing methods. I: 2008 International Symposium on Electrical Insulating Materials - ISEIM 2008. IEEE conference proceedings 2008 ISBN 978-4-88686-005-7.
ENERGISINT Untitled
 
2006
19 Atten, Pierre; Lundgaard, Lars Esben; Berg, Gunnar.
A simplified model of electrocoalescence of two close water droplets in oil. Journal of Electrostatics 2006 ;Volume 64.(7-9) p. 550-554
ENERGISINT Untitled
 
2005
20 Berg, Gunnar; Ingebrigtsen, Stian.
Electrostatic forces between charged and uncharged water drops in dielectric liquids. I: Proceedings of the 19th Nordic Insulation symposium. Tapir Akademisk Forlag 2005 ISBN 8251920558.
ENERGISINT Untitled
 
21 Berg, Gunnar; Lundgaard, Lars Esben; Hansen, F.K..
Elongation of water drops in oil during transient electric fields. I: 2005 International Conference on Dielectric Liquids, ICDL 2005. IEEE conference proceedings 2005 ISBN 0780389549. p. 189-192
ENERGISINT UiO Untitled
 
22 Chiesa, Matteo; Melheim, Jens Andreas; Pedersen, Per Atle; Ingebrigtsen, Stian; Berg, Gunnar.
Forces acting on water droplets falling in oil under the influence of an electric field: Numercal predictions versus experimental observations. European journal of mechanics. B, Fluids 2005 ;Volume 26. p. 717-732
NTNU ENERGISINT Untitled
 
23 Ingebrigtsen, Stian; Berg, Gunnar; Lundgaard, Lars Esben.
Electrocoalescence in stagnant emulsions. I: 2005 International Conference on Dielectric Liquids, ICDL 2005. IEEE conference proceedings 2005 ISBN 0780389549. p. 209-212
ENERGISINT Untitled
 
24 Lundgaard, Lars Esben; Berg, Gunnar; Ingebrigtsen, Stian; Atten, Pierre.
Electrocoalescence for Oil-Water Separation: Fundamental Aspects. I: Emulsions and Emulsion Stability, 2nd edition. Taylor & Francis 2005 ISBN 0-8247-2695-2. p. 549-592
ENERGISINT Untitled
 
2004
25 Hestad, Øystein Leif Gurandsrud; Berg, Gunnar; Ingebrigtsen, Stian; Liland, Knut Brede.
Streamer injection and growth under impulse voltage : a comparison of cyclohexane, Midel 7131 and Nytro 10X. I: 2004 Annual Report - Conference on Electrical Insulation and Dielectric Phenomena - CEIDP 2004. IEEE conference proceedings 2004 ISBN 0-7803-8584-5.
ENERGISINT Untitled
 
2003
26 Berg, Gunnar; Lundgaard, Lars Esben; Machazek, L..
Discharge signatures from a wedge geometry in transformer insulation of paper. I: 13th International symposium on high voltage Engineering - ISH 2003. Rotterdam: Millpress 2003 ISBN 9077017798. p. 591-591
ENERGISINT Untitled
 
27 Lundgaard, Lars Esben; Berg, Gunnar; Brede, Arne Petter; Kyrkjeeide, Stig Lidvin.
Acoustic location of discharges in power transformers. I: 13th International symposium on high voltage Engineering - ISH 2003. Rotterdam: Millpress 2003 ISBN 9077017798. p. 582-582
ENERGISINT NTNU Untitled
 
2002
28 Berg, Gunnar; Lundgaard, Lars Esben.
PD signatures of wedge type discharges in transformer insulation. I: Proceedings of the 2002 14th IEEE International Conference on Dielectric Liquids - ICDL 2002. IEEE conference proceedings 2002 ISBN 0-7803-7350-2.
ENERGISINT Untitled
 
29 Berg, Gunnar; Lundgaard, Lars Esben; Becidan, Michael; Sigmond, Reidar Svein.
Instability of electrically stressed water droplets in oil. I: Proceedings of the 2002 14th IEEE International Conference on Dielectric Liquids - ICDL 2002. IEEE conference proceedings 2002 ISBN 0-7803-7350-2.
ENERGISINT NTNU Untitled
 
30 Lundgaard, Lars Esben; Berg, Gunnar; Pedersen, Per Atle; Nilsen, Pål Jahre.
Electrocoalescence of water drop pairs in oil. I: Proceedings of the 2002 14th IEEE International Conference on Dielectric Liquids - ICDL 2002. IEEE conference proceedings 2002 ISBN 0-7803-7350-2.
ENERGISINT Untitled
 
2001
31 Lundgaard, Lars Esben; Linhjell, Dag; Berg, Gunnar.
Streamer/leaders from a metallic particle between parallel plane electrodes in transformer oil. IEEE transactions on dielectrics and electrical insulation 2001 ;Volume 8.(6) p. 1054-1063
ENERGISINT Untitled
 
1999
32 Berg, Gunnar; Lundgaard, Lars Esben.
Discharges in combined transformer oil/paper insulation. I: Proceedings of 1999 IEEE 13th International Conference on Dielectric Liquids - ICDL'99. IEEE conference proceedings 1999 ISBN 0-7803-4759-5.
ENERGISINT Untitled
 
33 Linhjell, Dag; Berg, Gunnar; Lundgaard, Lars Esben.
Streamers from a metallic particle between parallel plane electrodes in transformer oil. I: Proceedings of 1999 IEEE 13th International Conference on Dielectric Liquids - ICDL'99. IEEE conference proceedings 1999 ISBN 0-7803-4759-5.
ENERGISINT Untitled
 
1998
34 Lundgaard, Lars Esben; Linhjell, Dag; Berg, Gunnar; Sigmond, Reidar Svein.
Propagation of positive and negative streamers in oil gaps with and without pressboard interfaces. IEEE transactions on dielectrics and electrical insulation 1998 ;Volume 5.(3) p. 388-395
NTNU ENERGISINT Untitled
 
1996
35 Lundgaard, Lars Esben; Linhjell, Dag; Berg, Gunnar; Sigmond, Reidar Svein.
Positive and negative streamers in oil gaps with and without pressboard interfaces. I: 12th International Conference on Conduction and Breakdown in Dielectric Liquids 1996 - ICDL'96. IEEE conference proceedings 1996 ISBN 0-7803-3560-0. p. 175-180
ENERGISINT Untitled
 
1995
36 Berg, Gunnar.
Physics of electrocal breakdown of transformer oil. Trondheim: NTNU 1995 (ISBN 8271198785) Doktor ingeniør avhandling, ntnu(1995:125)
ENERGISINT Untitled
 
1994
37 Linhjell, Dag; Lundgaard, Lars Esben; Berg, Gunnar.
Streamer propagation under impulse voltage in long point-plane oil gaps. IEEE transactions on dielectrics and electrical insulation 1994 ;Volume 1.(3) p. 447-458
ENERGISINT NTNU Untitled
 
1993
38 Berg, Gunnar; Sigmond, Reidar Svein.
The initial stages of positive and negative corona DC breakdown of transformer oil. I: Proceedings of 1993 IEEE 11th International Conference on Conduction and Breakdown in Dielectric Liquids -ICDL'93. IEEE conference proceedings 1993 ISBN 0-7803-0791-7. p. 342-346
ENERGISINT NTNU Untitled
 
39 Linhjell, Dag; Berg, Gunnar; Lundgaard, Lars Esben.
Streamer propagation in long point-plane oil gaps. I: Proceedings of 1993 IEEE 11th International Conference on Conduction and Breakdown in Dielectric Liquids -ICDL'93. IEEE conference proceedings 1993 ISBN 0-7803-0791-7. p. 268-273
ENERGISINT Untitled
 
1992
40 Dejean, P.; Berg, Gunnar; Goldman, M; Sigmond, Reidar Svein; Dejean, H..
Ageing kinetics of solid insulating materials submitted to partial discharges. I: Proceedings of the 4th International Conference on Conduction and Breakdown in Solid Dielectrics 1992. IEEE conference proceedings 1992 ISBN 0-7803-0129-3. p. 200-204
ENERGISINT Untitled