Blar i Institutt for elkraftteknikk på tittel

Viser treff 1288-1307 av 2415

    • Lågspentforsyning i grisgrendte strøk 

      Hermann Skromme (Master thesis, 2019)
      Forbruksmønsteret hjå straumkundane er i stadig utvikling, og dette kan medføra at nettselskapet får problem med spenningskvaliteten når kunden aukar forbruket sitt. Det har i seinare tid kome til utfordrande laster, som ...

    • LCOE-Based Pricing for DLT-Enabled Local Energy Trading Platforms 

      Dynge, Marthe Fogstad; Halden, Ugur; Klæboe, Gro; Cali, Umit (Peer reviewed; Journal article, 2022)
      Support schemes like the Feed-in-Tariff (FiT) have for many years been an important driver for the deployment of distributed energy resources, and the transition from consumerism to prosumerism. This democratization and ...

    • Learning excursion sets of vector-valued Gaussian random fields for autonomous ocean sampling 

      Fossum, Trygve Olav; Travelletti, Cedric; Eidsvik, Jo; Ginsbourger, David; Rajan, Kanna (Journal article, 2021)
      Improving and optimizing oceanographic sampling is a crucial task for marine science and maritime resource management. Faced with limited resources in understanding processes in the water column, the combination of statistics ...

    • LED for belysning i tunneler 

      Often, Per Melander (Master thesis, 2016)
      Norge er et land med 1200 biltunneler som tradisjonelt har blitt belyst med trinnstyring av damplamper. På grunn av LED-teknologiens voldsomme utvikling innen belysningsformål de siste årene, er dette i ferd med å endre ...

    • LED for vei- og gatebelysning 

      Heide, Jørgen Anker-Rasch (Master thesis, 2011)
      Denne masteroppgaven har som formål å finne ut av om LED er egnet til vei- og gatebelysning. Analysen baserer seg på ulike målinger gjort i laboratorium og på testanlegget til NTNU, samt to spørreundersøkelser. Det er gjort ...

    • A Length Scale Approach to the Highest Standing Water Wave 

      Tyvand, Peder A.; Nøland, Jonas Kristiansen (Journal article; Peer reviewed, 2021)
      The highest standing surface wave at infinite depth is a classical hydrodynamic problem, illuminated by Taylor’s ex- cellent experiments [Taylor, G. I., Proc. R. Soc. Lond. Ser. A 218, 44 (1953)]. Based on length scale ...

    • Leveraging residential battery energy storage systems for voltage support in remote distribution grids with high penetration of renewables 

      Bratlie, Frida (Master thesis, 2021)
      Den høye penetrasjonen av fornybare energiressurser i distribusjonsnettet medfører nye operasjonelle utfordringer for nettselskapene. Overspenning er spesielt et problem som utgjør den største begrensningen for integrering ...

    • Leveringspålitelighet og risiko for nettsammenbrudd i BKK-området 

      Mørk, Jannicke Catharina (Master thesis, 2011)
      Kraftsystemet i BKK-området har vært et dagsaktuelt tema de siste årene som følge av ulike oppfatninger om hvordan en redusert forsyningssikkerhet i området skal håndteres. I denne rapporten er det gjennomført en analyse ...

    • Life Cycle Assessment of Biogas/Biofuel Production from Organic Waste 

      Seldal, Tiril Jeanette (Master thesis, 2014)
      The focus on energy production is important today and will be of even bigger importance in the future. With an increase in the world s population and at the same time a more energy demanding one the energy issue is and ...

    • Life Cycle Assessment of Desalinated Water for Enhanced Oil Recovery 

      Kvadsheim, Mari Hellvik (Master thesis, 2013)
      Currently, fossil fuels supply 85% of the world?s energy demand. Nevertheless, we consume more than we are able to produce from new discoveries of fossil resources. As energy demand is predicted to grow rapidly over the ...

    • Life Cycle Assessment of Road Vehicles for Private and Public Transportation 

      Sundvor, Christian Fredric (Master thesis, 2013)
      Ever increasing prosperity and global civilization heralds an increasing demand for communication and transport. The transport sector alone accounts for one quarter of global human greenhouse gas emissions. In the transport ...

    • Life cycle assessment of secondary aluminium refining 

      Gilstad, Gro (Master thesis, 2013)
      The goal of this life cycle assessment is to investigate refining methods which makes it possible to utilise post-consumer aluminium scrap in production of aluminium products that have strict requirements to chemical purity. ...

    • Life Cycle Assessment of Ventilation Systems 

      Schau, Marie (Master thesis, 2013)
      AbstractThree different analyses are conducted in this thesis. First there is made a database of ventilation components with life cycle inventory (LCI) data that can be used to optimize duct work systems based on LCA. These ...

    • Life Cycle Assessment of Wastewater Treatment for Oil and Gas Operations 

      Torp, Anne Lise (Master thesis, 2014)
      Comparison of the three scenarios

    • Lightning Impulse Testing in Short Air-Gaps and Memory Effect of Previous Discharges 

      Subhana, Arik; Støa-Aanensen, Nina Sasaki; Gammelsæter, Marte; Marskar, Robert; Mauseth, Frank (Peer reviewed; Journal article, 2024)
      This paper reports on an observed phenomenon of increasing breakdown voltage while performing standard up and down lightning impulse (LI) testing in short air-gaps with weakly non-uniform field in an enclosed volume. The ...

    • Limitations and Guidelines for Damage Estimation Based on Lifetime Models for High-Power IGBTs in Realistic Application Conditions 

      Antonopoulos, Antonios; D'Arco, Salvatore; Hernes, Magnar; Peftitsis, Dimosthenis (Peer reviewed; Journal article, 2020)
      Statistical lifetime models for high-power IGBTs are developed based on results from power-cycling experiments, and relate lifetime expectancy to the well-defined conditions of a laboratory experiment. In most cases, ...

    • Limitations in Impedance Reshaping of Grid Forming Converters for Instability Prevention 

      Shah, Chirag Ramgopal; Molinas, Marta; Nilsen, Roy; Amin, Mohammad (Chapter, 2023)
      Under a weak grid scenario, Grid Forming (GFM) converters have superior impedance-based small-signal stability compared to Grid Following (GFL) converters. The underlying assumption in defining a weak grid has traditionally ...

    • Limitations Regarding Use of the ABC-Model for Interpretation of Partial Discharge Measurements 

      Aakre, Torstein Grav; Skattenborg, Regina; Ildstad, Erling (Journal article; Peer reviewed, 2019)
      The main purpose of the work presented here is to facilitate use of partial discharge (PD) measurements as a diagnostic tool for condition assessment of hydropower generator bars. The main aim of the work is to clarify how ...

    • Limiting imbalance settlement costs from variable renewable energy sources in the Nordics: Internal balancing vs. balancing market participation 

      Klyve, Øyvind Sommer; Klæboe, Gro; Nygård, Magnus Moe; Marstein, Erik Stensrud (Peer reviewed; Journal article, 2023)
      Due to the market gate closures in the Nordic energy markets, producers with variable renewable energy (VRE) assets, e.g., PV and wind power plants, must forecast their production prior to delivery, leaving room for ...

    • Linking Global and Regional Energy Strategies (LinkS) 

      Bakken, Bjørn Harald; Dalen, Kari; Graabak, Ingeborg; Knudsen, Jørgen Kjetil; Ruud, Audun; Warland, Leif; Wolfgang, Ove; Doorman, Gerard L.; Skar, Christian; Tomasgard, Asgeir; Valdes, Gerardo Alfredo Perez (SINTEF Energi. Rapport;, Research report, 2014)
      The LinkS project was designed to analyse how global long-term strategies can be used as guidelines for the development of energy supply and technology deployment in regional energy systems. In order to produce recommendations ...