Blar i NTNU Open på forfatter "Uhlen, Kjetil"
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Harmonic Resonance Analysis of Offshore Wind Farm utilizing Type-IV Wind Turbines
Teigmoen, Anders (Master thesis, 2021)Utnyttelse av fornybare energikilder er av største betydning for å oppnå de bærekraftige utviklings- målene som er satt av FN. Av disse energikildene har havvind et betydelig potensiale. For å utnytte dette potensialet må ... -
Hydro Turbine and Governor Modelling: Electric - Hydraulic Interaction
Lucero Tenorio, Luz Alexandra (Master thesis, 2010)This Master s Thesis work deals with the development of improved hydro turbine models for the evaluation of a hydraulic power generating system performance in response to small disturbances in power system analysis tool. ... -
Hywind Powering Utsira - A reliability study of offshore wind connected to multiple oil and gas platforms
Vetvik, Idun (Master thesis, 2017)Today four oil and gas platforms are being commissioned in the Utsira High area. One of the platforms is powered from shore by a 120MW/+-80 kV HVDC cable. The three other platforms will first be powered by gas turbines ... -
Identification of coherency and critical generators set in real-time signal
Schweta, NN; Kishor, Nand; Uhlen, Kjetil; Soumya, Mohanty (Journal article; Peer reviewed, 2017)For a reliable and stable operation of a power system network, it is important to monitor the dynamics of the system. For this purpose, in real system phasor measurement units (PMUs) have been installed to give information ... -
Identification of Hydro turbine governors using PMU data
Jakobsen, Sigurd Hofsmo; Uhlen, Kjetil; Bombois, Xavier (Chapter, 2018)Recent concerns for the frequency quality in the Nordic power system has lead to an increased interest in hydro turbine governors. Among this research have been papers on identification of turbine and turbine governor ... -
Impact of Combining a STATCOM and an Active Filter on the Modular Multilevel Converter Controller
Authen, Hanna (Master thesis, 2019)Spenningen i et transmisjonsnett kan forbedres ved å installere en STATCOM. Ved å forbedre spenningsnivået øker effektkvaliteten og forsyningssikkerheten blir bedret. Å installere en STATCOM har vist seg å være fordelaktig ... -
Impact of hydro-turbine and governor parameters on stability of grid connected power system
Zangmo, Gayleg; Om, Khandu; Uhlen, Kjetil (Journal article; Peer reviewed, 2017)Hydro-turbine and governor parameters affect power system stability. It is essential to identify the parameters of the hydraulic system, turbine, and governor to improve the powersystem stability. In this study, we carry ... -
Impact of Location of Frequency Reserves
Bjelland, Sunniva (Master thesis, 2019)Andelen av fornybar produksjon og kapasitet på HVDC kabler i kraftsystemet er økende. Det forårsaker store og hyppige variasjoner i kraftflyt, redusert kinetisk energi i systemet og begrensede reserver tilgjengelig fra ... -
Impact of Variable-Speed Hydro on Power System Frequency Stability
Aronsveen, Espen (Master thesis, 2018)In this thesis the impacts of variable-speed hydro on the system frequency is studied, by developing a simplified power system model in Simulink based on the swing equation and DC power flow. The model is verified against ... -
Impacts of Interconnecting the Wind Farm Projects within the Dogger Bank Zone: A Technical-Economical Evaluation of the Impact of Increased Wind Farm Connection Reliability
Veila, Siri (Master thesis, 2013)The Dogger Bank zone, which has been awarded to Forewind for development, is planned as the world s largest offshore wind farm with an agreed target of 9 GW installed capacity. Due to the size of the wind farm it will be ... -
Inertia and FCR in the Present and Future Nordic Power System - Inertia Compensation
Hamre, Silje Mork (Master thesis, 2015)The power system characteristics are changing and new power production in the Nordic countries is dominated by modern wind turbines and small scale hydro power. These are wind turbines that are electrically decoupled from ... -
Integrated Modelling Platform for Dynamic Performance Assessment of Floating Wind Turbines
Endegnanew, Atsede Gualu; Satertro, Kristian; Gjerde, Sverre Skalleberg; Svendsen, Harald Georg; Anaya-Lara, Olimpo; Tande, John Olav Giæver; Uhlen, Kjetil; Gjolmesli, Svein (Peer reviewed; Journal article, 2015)The paper presents an integrated modelling platform that can be used to assess the dynamic performance of an offshore wind turbine mounted on a spar-buoy type floater. Sub-models of generator and converter controllers and ... -
Introduksjon av vindkraft i regionalnett med begrenset overføringskapasitet
Husby, Marte Asbøll (Master thesis, 2012)Denne masteroppgaven omhandler stasjonære analyser i forbindelse med utbygningen av en ny vindmøllepark i Ytre Vikna, og er gitt av NTE Nett AS. Gjennom stor introduksjon av vindkraft og småkraft møter nettselskap etter ... -
Investigation of various solutions for improved voltage quality in weak distribution networks
Fellner, David (Master thesis, 2018)This thesis is investigating several solutions to improve voltage stability and the short circuit capacity of weak distribution networks. In order to do so electric machines are added to the grid and their impact is ... -
Kapasitetsutnyttelse og Stabilitet ved Nettilknytning av Vindkraftverk
Gabrielsen, Håkon (Master thesis, 2013)Utfordringer i forbindelse med nettilknytning er i mange prosjekter en hindring for god utnyttelse av de verdifulle vindkraftressursene som finnes i Norge. Tradisjonelle tilnærminger for kapasitetsvurdering ved nettilknytning ... -
Laboratory Demonstration of Frequency Support Provision from VSC-HVDC-connected Full Converter Wind Turbines
Ødegård, Jon Nerbø (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
Støylen, Hanne (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
Teearu, Kalle (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
Fjeldberg, Kjeld (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 ... -
Long-term Peak Power and Energy Forecasting in Norwegian Electricity Grids
Wang, Jacob (Master thesis, 2021)Elkraftbransjen opplever i disse tider store endringer og rask utvikling innenfor mange teknologiske områder. Innføringen av grønne teknologier og flere digitale løsninger legger grunnlag for nye muligheter for produsenter, ...