Browsing Institutt for elkraftteknikk by Subject "Energi og miljø, Elektrisk energiomforming"
Now showing items 41-60 of 78
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Harmonic Resonance Mode Analysis and Application for Offshore Wind Power Plants
(Master thesis, 2015)This thesis is centred around a form of resonance analysis for power systems known as Harmonic Resonance Mode Analysis (HRMA). It is a form of eigenvalue analysis and has some parallels to the modal analysis commonly ... -
Harmonic Sharing in Microgrid Applications - Modeling, Developing and Evaluating a Microgrid Control System With Harmonic Sharing Capability
(Master thesis, 2018)The world is critically dependent on a transition from fossil fuels to renewable energy. Microgrids represent a promising systematic approach to increasing the reliability of the power system and solving the challenge of ... -
Health Indexing of Norwegian Power Transformers
(Master thesis, 2015)In this thesis, a health index model for condition evaluation of power transformers is proposed. A health index is a tool that processes service and condition data into a score which describes the overall health of an ... -
Innmating av solkraft i lavspenningsnett
(Master thesis, 2016)Støtte fra Enova til utbygging av private solcelleanlegg har stimulert til en økning i antall solcelleanlegg i Norge [19]. Med en økning av distribuert generering oppstår det utfordringer forbundet med spenningskvalitet ... -
Integrating Battery into MMC Submodule using Passive Filter and Control Technique
(Master thesis, 2017)The growing need and importance of Battery Energy Storage Systems (BESS) in grid support applications as well as in the transportation sector, has brought attention to the adaption of the Modular Multilevel Converter (MMC) ... -
Investigation of Interior Permanent Magnet Machines with Concentrated Windings for High Dynamics Applications
(Master thesis, 2015)Interior permanent magnet (IPM) machines and non-overlapping concentrated windings (CW) are two design philosophies that have grown in popularity over the last decade. This is due to the many benefits and flexibility they ... -
Investigation of Loss Calculation Methods for PMSMs and Implementation of Loss Functionality on a Developed FEM Model
(Master thesis, 2016)Accurate estimation of losses is one of the major challenges in electromagnetic machinery modelling. Where permanent magnet synchronous machines are attractive for high performance applications, making them relevant for ... -
Isolated Full-Bridge DC-DC Converter Configurations for Photovoltaic Applications using Modular Multilevel Converter
(Master thesis, 2018)As a result of the continuously increasing carbon emissions, the global demand for cleaner energy is rising. Grid-connected photovoltaic (PV) systems is an attractive solution to provide green energy, and PV technology has ... -
Kapasitivt indusert ladning i høyspentmast fra nærliggende kraftledning
(Master thesis, 2017)Oppgaven beregner kapasitivt indusert ladning i en høyspentmast i stål, plassert i nærheten av en spenningssatt 420 kV kraftledning. Beregningene ble gjort for varierende avstand til kraftledning og for varierende ... -
Kontrollstrategier for lading og utlading av et batteri i samsvar med last og produksjon hos en plusskunde
(Master thesis, 2017)Denne masteroppgaven har analysert funksjonaliteten til utviklede use cases ved å utføre forsøk i laboratoriet. Use casene har blitt utviklet for en batteripakke plassert i en husstand med PV produksjon tilknyttet strømnettet ... -
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 ... -
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 ... -
Loss Analysis in Laminated Iron Cores using COMSOL Multiphysics and LiveLink for Matlab
(Master thesis, 2018)A framework for loss analysis using COMSOL and LiveLink for Matlab is presented in this thesis. The loss analysis is based on Steinmetz' theory on iron core losses. IEC standard 60404-8-4:2013 gives a method of presenting ... -
Low Frequency Alternating Current (LFAC) Transmission Systems for Offshore Wind Farms - Case Studies on the Use of LFAC, Based on Horns Rev 3 Offshore Wind Farm
(Master thesis, 2017)This thesis investigates the use of low frequency alternating current (LFAC) for the longdistance transmission of the power extracted from offshore wind farms. It is based on the measurement of power flow in different nodes ... -
Model of Single-Phase Synchronous Generator for Rotary Frequency Converter
(Master thesis, 2018)Synchronous-synchronous rotary frequency converters are in the Norwegian traction power system applied for converting three-phase AC voltage at 50 Hz to single-phase AC voltage at 16 2/3 Hz. The converters consist of a ... -
Model of single-phase synchronous machine for rotary frequency converter - Developement of time-domain model, including excitation system
(Master thesis, 2016)This thesis concerns the development of a single-phase synchronous machine model in time-domain, with instantaneous value output. The model is meant to represent the generator part of the rotary converter used in the ... -
Modeling and Control of a DC-grid Hybrid Power System with Battery and Variable Speed Diesel Generators
(Master thesis, 2016)Hybrid electric power systems (HPS) have successfully been integrated in the road-traffic industry due to enhanced efficiency and environmental benefits. Recently this concept has been implemented in the marine sector. In ... -
Modelling, Simulation, and On-line Detection of Rotor Eccentricity in Hydropower Generators
(Master thesis, 2018)The generator is a critical component in the hydropower power plant, and detection of its fault conditions is important for safe and cost-effective operation. A new proposed method for detection of rotor interturn short ... -
Modular Multilevel Converter for Electric Motor Drive Applications
(Master thesis, 2015)In this master thesis the topic of Modular Multilevel Converters (MMC) has been studied. The working principle of the converter is presented with advantageous attributes such as a multilevel waveform, a modular realization ... -
Operation of IGBT-Modules in Insulation Liquids - A First Step for Enabling Operation in High Pressure Environments
(Master thesis, 2015)Theory regarding the main components needed in a subsea converter are provided. Focus is spent on the IGBT and pulse testing are described. A safe and fully functional test cell for high voltage single and double pulse ...