Blar i Institutt for elkraftteknikk på forfatter "Norges teknisk-naturvitenskapelige universitet, Fakultet for informasjonsteknologi, matematikk og elektroteknikk, Institutt for elkraftteknikk"
-
2D Finite Element (FE) modeling and simulation of the stator winding of synchronous machines in adjustable degree of detailing
Hole, Håkon (Master thesis, 2007)The General Purpose 2D Electromagnetic Tool, GP2DET, at Voith Siemens Hydro Power Generation GmbH is a tool developed for simulation and calculation of electrical parameters in large hydro power machines. In this tool, the ... -
30 kW Power Boost System for Drive Trains for Electric Vehicles Based on Supercapacitor Technologies
Lium, Frode (Master thesis, 2007)The goal of the master thesis is to design, dimension and construct a power boost system for the drive trains in electric vehicles, utilizing supercapacitor technology. In order to build the system a supercapacitor bank ... -
A Method for bidding in sequential Capacity Reserve Markets using mixed-integer programming
Lindsjørn, Mads Vilhelm (Master thesis, 2012)System security and power quality is important in today's society and the ability to regulate and balance production and consumption is crucial for any power system. More and more penetration of intermittent production in ... -
A Solution for Low Voltage Ride Through of Induction Generators in Wind Farms using Magnetic Energy Recovery Switch
Fønstelien, Olav Jakob (Master thesis, 2009)Induction generators constitute 30 percent of today’s installed wind power. They are very sensitive to grid voltage disturbances and need retrofitting to enhance their low voltage ride through (LVRT) capability. LVRT of ... -
A stochastic optimization approach for pricing hydropower regulation capacity in electricity markets
Fjelldal, Bjørnar; Nafstad, Sjur Messel (Master thesis, 2014)With the introduction of an increasing number of regulation markets,hydropower producers face multiple opportunities regarding how toutilize their water optimally. Such regulation markets can increaseprofits drastically ... -
Ablation-Assisted Current Interruption in a Medium Voltage Load Break Switch: An Experimental Study with Polypropylene as Ablation Material
Gjendal, Gaute Jensen (Master thesis, 2014)Near an electric arc some polymers can change the properties of an arcing medium in a beneficial manner. Such polymers, known as ablation material, decompose and evaporate when exposed to heat from an electric arc. The ... -
AC Loss in MgB2 Superconductors: Calorimetric Loss Measurement
Taxt, Henning (Master thesis, 2012)Ever since the phenomenon of superconduction was discovered, and especially after the discovery of high-temperature superconductors (HTS) in the mid-80s, there has been high expectations to what could be achieved by this ... -
AC losses in MgB2 superconductors
Giljarhus, Sigrid Anne (Master thesis, 2007)This Master thesis studies losses in superconductors. Losses arise when the superconductor carries alternating current or is placed in an alternating magnetic field. As most power applications involve at least one of the ... -
AC machine control: Robust and sensorless control by parameter independency
Samuelsen, Dag Andreas Hals (Doktoravhandlinger ved NTNU, 1503-8181; 2009:124, Doctoral thesis, 2009)In this thesis it is first presented how robust control can be used to give AC motor drive systems competitive dynamic performance under parameter variations. These variations are common to all AC machines, and are a result ... -
AC-tap i MgB2-superleder: Effekt av simulert slaglende
Lindau, Sandra Madeleine (Master thesis, 2013)Superconductive materials can conduct DC currents without energy losses when cooled down below their critical temperature. However, under AC conditions, energy losses appear in the superconductor. In 2001 the new and ... -
Active Control of Reactive Power in a Modern Electrical Rail Vehicle
Toreid, Eivind (Master thesis, 2011)Modern electrical rail vehicles employ four-quadrant voltage source converters, which allow independent control of real and reactive power. This thesis focuses the control of reactive power at the vehicle regarding load ... -
Active Harmonics Filtering of Distributed AC System
Shahbaz, Muhammad (Master thesis, 2012)The tendency of connecting the Power Electronic loads and distributed power plants through Power Electronic converters is increasing day by day. These Power Electronic converters and loads are the sources of harmonics and ... -
Advanced Battery Diagnosis for Electric Vehicles
Lamichhane, Chudamani (Master thesis, 2008)Summary Literatures on battery technologies and diagnosis of its parameters were studied. The innovative battery technologies from basic knowledge to world standard testing procedures were analysed and discussed in the ... -
Air reversing CO2 heat pumps
Andreassen, Hanne Elisabeth Bø (Master thesis, 2010)CO2 is an environmentally friendly refrigerant that has a no global warming potential when used as refrigerant. The current refrigerants used for air conditioning in public transport are chemical components, and have a ... -
Aldring av PEX-isolasjon ved påtrykk av HVDC med overlagrede transienter
Amundsen, Martin (Master thesis, 2012)Produksjon av elektrisk kraft fra offshore vindturbiner vil bli en stor utfordring i nær fremtid. Forskningsrådet har i den forbindelse tildelt SINTEF et femårig forskningsprosjekt på HVAC og HVDC undervannskabler for ... -
Allocation of Battery Production Impact between EVs and Battery Reuse Applications
Furuseth, Marta (Master thesis, 2014)Significant environmental impacts associated with electric vehicle (EV) Li-ion battery pack production has lead to a desire to explore the possibility of offsetting some of the environmental burdens associated with the ... -
An investigation on gridconnectable single phase photovoltaic inverters
Gundersen, Bjørnar (Master thesis, 2010)Several inverter topologies for use with power conditioning of photovoltaic modules were investigated with both national and international requirements in mind, as well as also practical challenges and the ability to be ... -
Analyse av CO2-varmepumper for varmtvannsberedning av boligblokker
Borge, Mads (Master thesis, 2014)SammendragRapporten er skrevet som masteroppgave utført ved NTNU våren 2014 og omhandler det installerte varmtvannsberedningsanlegget ved Tveita borettslag i Oslo. Tveita borettslag ble oppført i 1967, og består av tre ... -
Analyse av konsekvenser ved reduksjon av turtemperaturnivået i fjernvarmesystemer
Gurholt, Marius Kind (Master thesis, 2011)Sammendrag Av mange grunner er det gunstig å operere med et lavt temperaturnivå i fjernvarmesystem. Dette reduserer tapene i nettet, og kan forbedre ytelsen til de varmeproduserende enhetene i fjernvarmesystemet. Det er ... -
Analysemodell for vedlikehold og reinvesteringer i kraftnett
Solli, Maja (Master thesis, 2012)På grunn av den økende alderen på mye av distribusjonsnettet og den økte ressursbruken dette medfører, har nettselskap satt fokus på hvordan vedlikehold og reinvestering kan planlegges og utføres på en best mulig måte. ...