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Students Perceptions on Teaching Design of Power Electronics Using Student-Response Systems: Thematic Content Analysis of Interviews
(Peer reviewed; Journal article, 2022)The paper presents an empirical study conducted in the context of an advanced power electronics design course in a technical university. In selected points of the lectures formative assessments were introduced and supported ... -
Studies of Combustion in Berkeley's Vitiated Co-flow burner
(Master thesis, 2011)An experimental investigation is presented of unsteady N2-H2 jet flames in a co-flow of hot combustion products of lean premixed hydrogen combustion. The unsteady jet flame is characterized by rapid ignition followed by a ... -
Study and development of Solid State based Long Pulse Klystron Modulators for future Linear Accelerators at CERN
(Master thesis, 2007)A new Klystron modulator is to be developed as a part of the new Linear Accelerator (LINAC4) project that is currently running at CERN. The Klystron modulator is required to supply a pulsed output voltage of -100 kV / 20 ... -
Study of frequency dependent loss in magnetic steel by the Jiles-Atherton method
(Master thesis, 2018)This thesis is a continuation of a specialization project which investigated the possibility of simulating the hysteresis and eddy current losses in carbon steel. The work comprises an investigation of how to efficiently ... -
Study of Particle Resuspension by Impaction
(Master thesis, 2011)This thesis discusses particle resuspension from surfaces caused by particle impaction. The thesis also focuses on particle transport and different transport mechanisms regarding different particle sizes. The transport ... -
Study of rail potential and earth current for the BTRC and AT systems
(Master thesis, 2023)Denne oppgaven studerte AC forsyningssystemer i Norge og sammenlignet BTRC- og AT-systemene. Spesifikt ble skinnepotensialet og strømmen i jordsmonnet i returkretsen studert siden disse kan være farlige for mennesker eller ... -
Study on locating transformer internal faults using sweep frequency response analysis
(Journal article; Peer reviewed, 2017)As an extensive network of resistances, capacitances, and inductances, a transformer has inherent characteristic parameters that are functions of frequency. The form of these functions is predicated on the geometric design ... -
Study on the Reactive Power Behaviour of the Variable Frequency Transformer
(Master thesis, 2018)The majority of the power system networks in the world today operate at a nominal frequency of either 50 or 60 Hz. Merging of adjacent power networks will expand the world's power supply system and thereby increase the ... -
Study on the Variable Frequency Transformer's Operation and Frequency Range
(Master thesis, 2022)Inherently variable power generation from renewable energy sources (RES), such as wind turbines and solar panels, is challenging for energy shifting. Merging separated power grids into a super grid with various RES besides ... -
Sub Sea Power Electronics
(Master thesis, 2007)Sub sea compression for maintaining reservoir pressure in a gas field is important to have a steady production of gas as it is extracted from the field. Electrical drives in the several megawatt range are suitable to control ... -
Subsea motor drives with long subsea cable
(Master thesis, 2014)Oil and gas are extracted from the fields by the pumps, which are driven by the electrical motors. With the tendency to increase the distance between the platform and the subsea field, where the motor is installed, the ... -
Subsea Permanent Magnet Motor with Damper winding
(Master thesis, 2014)Permanent Magnet (PM) machines can have difficulties dealing with unstable loads, which in worst case can make the machine to step-out of synchronous speed. This problem can be avoided by equipping the rotor with damper ... -
Subsea Power Electronics: Switching of an IGBT module in a subsea converter
(Master thesis, 2008)Global increases in energy demand will inevitable lead to increased oil and gas exploration in areas not considered economically viable today. In these areas with large depths and hostile conditions subsea system solutions ... -
Subsea varmeveksling: Numerisk undersøkelse av varmeovergang ved naturlig og tvungen konveksjon for rør nedsenket i vann
(Master thesis, 2010)Denne oppgaven tar for seg problemstillinger innenfor kjøling av subsea brønnstrømmer, og muligheten for bruk av passiv kjølemetode. Det er her sett på varmeveksling ved hjelp av frikonveksjon og eventuelle naturlige ... -
Sufficient Conditions for Robust Frequency Stability of AC Power Systems
(Peer reviewed; Journal article, 2020)This paper analyses the frequency stability of ac grids in the presence of non-dispatchable generation and stochastic loads. Its main goal is to evaluate conditions in which the system is robust to large, persistent active ... -
Suitability assessment of high-power energy storage technologies for offshore oil and gas platforms: A life cycle cost perspective
(Peer reviewed; Journal article, 2023)This paper presents a technology suitability assessment (TSA) of high-power energy storage (ES) systems for application in isolated power systems, which is demonstrated through the case of offshore oil and gas platforms ... -
Suitability assessment of high-power energy storage technologies for offshore oil and gas platforms: A life cycle cost perspective
(Peer reviewed; Journal article, 2023)This paper presents a technology suitability assessment (TSA) of high-power energy storage (ES) systems for application in isolated power systems, which is demonstrated through the case of offshore oil and gas platforms ... -
Superconducting magnetic energy storage in power systems with renewable energy sources
(Master thesis, 2010)The increasing focus on large scale integration of new renewable energy sources like wind power and wave power introduces the need for energy storage. Superconducting Magnetic Energy Storage (SMES) is a promising alternative ... -
Superconducting Multiphase Wind Power Generator
(Master thesis, 2021)En undersøkelse av AC-superledende spoler utføres med en permanentmagnetgenerator for en vindkraftturbin på 15 MW. To referansemodeller er dimensjonert: på den ene siden blir en DTU og NREL 15 MW vindturbinmodell tatt som ... -
Superledere i synkronmaskiner
(Master thesis, 2007)Hensikten med denne oppgaven er å skaffe en oversikt over utførte synkronmaskinprosjekter verden over, som har benyttet superledere i felt- eller statorviklinger. Videre er et dimensjoneringseksempel utføret, for å se på ...