Browsing Institutt for elkraftteknikk by Title
Now showing items 1357-1376 of 2565
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Lab Setup and Testing of Lithium-Ion Batteries with Focus on Dynamic and Aging Modeling
(Master thesis, 2013)This report presents the work on making a lab setup for testing of different types of batteries in the energy storage lab at NTNU/SINTEF. A complete lab setup has been made and two different LiFePO4 chemistry cells of size ... -
Laboratory Demonstration of Frequency Support Provision from VSC-HVDC-connected Full Converter Wind Turbines
(Master thesis, 2015)The state of the art in wind power technology is offshore VSC-HVDC-connected (Voltage Source Converter-High Voltage Direct Current) offshore wind farm of Full Converter Wind Turbines (FCWT). This latest generation of wind ... -
Laboratory Demonstration of Provision of Primary Frequency Control Services from VSC-HVDC Connected Wind Farms
(Master thesis, 2014)Frequency control is a particularly significant issue with high levels of rotating generating units interfaced with power electronics in the power system. Since the power electronic converter decouples the generating unit ... -
Laboratory Testing of Multi-terminal VSC-HVDC
(Master thesis, 2013)This report documents laboratory testing of multi-terminal HVDC system in down-scaled model. First, analytical method for solving DC power flow is introduced and explained. Power flow equations are set up and implemented ... -
Laboratory Testing of Virtual Inertia Provided by Converters in Weak Grids
(Master thesis, 2021)Økende andel av uregelmessig fornybar energiproduksjon i nettet gir et økt behov for fleksibel energilagring for å sikre frekvensbalansen. Pumpekraftverk er den mest modne teknologien for å dekke dette behovet. Med variabel ... -
Laboratory Verification of the Modular Converter for a 100 kV DC Transformerless Offshore Wind Turbine Solution
(Journal article; Peer reviewed, 2013)In this paper, an experimental verification of the control of a modular series connected voltage source converter suitable for an HVDC transformerless offshore wind turbine is presented. The test bench is built around a ... -
Ladesystem for elbiler i et borettslag ved bruk av smart-lading og lokal solenergi
(Bachelor thesis, 2021)I denne rapporten skal man undersøke hvilken rolle smart-lading og solcelleteknologi kan ha for et elbilladeanlegg. Rapporten skal belyse hvilke muligheter man har for å installere et ladeanlegg i et eksisterende bygg med ... -
Langsiktige scenarier for europeisk energiforsyning
(Master thesis, 2013)Målet med arbeidet beskrevet i denne rapporten har vært å undersøke to langsiktige scenarier for europeisk energiforsyning. Utviklingen av det europeiske energisystemet er analysert i en tidsperiode på 50 år; fra 2010 til ... -
Large scale integration of wind power in a transmission grid
(Master thesis, 2009)In this report, only stationary analyses have been performed. The results and analyses performed are based on the model as described in the system description. Assumptions made and deviations from the real life grid may ... -
Large Superconducting Wind Turbine Generators
(Journal article; Peer reviewed, 2012)To realize large (>10 MW) direct-driven off-shore wind turbines, a number of steps are needed to reduce weight and cost compared to on-shore technologies. One of the major challenges is to provide drive trains which can ... -
Large-scale Wind Power integration in a Hydro-Thermal Power Market
(Master thesis, 2007)This master thesis describes a quadratic programming model used to calculate the spot prices in an efficient multi-area power market. The model has been adapted to Northern Europe, with focus on Denmark West and the ... -
Large-scale wind power integration in Nordland
(Master thesis, 2007)Nord-Norsk Vindkraft AS is planning to build two wind farms in Nordland, Norway. The wind farms are located at Sleneset and Sjonfjellet. The planned total installed power is 653 MW. An important part of the planning phase ... -
Lastmodellering og energiøkonomisering i smarte distribusjonsnett: Ved anvendelse av ny trinningsstrategi for kraft- og fordelingstransformatorer
(Master thesis, 2014)Omlag halvparten av energitapene i det norske kraftnettet ligger i distribusjonsnettet. Tapsminimering i distribusjonsnettet er derfor viktig for nettselskapene. I denne oppgaven kartlegges energiøkonomiske konsekvenser ... -
Laststyring for å redusere nettbelastning
(Bachelor thesis, 2021)I denne bacheloroppgaven blir det undersøkt løsninger for å redusere effekttopper i strømforbruket til forskjellige bygg. Oppgaven er gitt av Norconsult. De har bistått med informasjon som gjør at det kunne ses på løsninger ... -
Laterally Penetrative Onset of Convection in a Horizontal Porous Layer
(Peer reviewed; Journal article, 2020)The onset of Darcy–Bénard convection in an unlimited horizontal porous layer is studied theoretically. The thermomechanical boundary conditions of Dirichlet or Neumann type at the lower and upper plane are switched from ... -
Lavfrekvente elkvalitetssproblemer i fordelingsnett forårsaket av høyspennings asynkronmaskiner i pumpestasjon
(Master thesis, 2016)Et norsk nettselskap har mottatt kundeklager om synlig flimmer med hastighet på 2 Hz i belysningsutstyr bak elektroniske dimmere. Målinger avslører at spesielt 5.- og 7. harmoniske komponent inneholder en tydelig ... -
Lågspentforsyning i grisgrendte strøk
(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
(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
(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
(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 ...