Blar i Institutt for elkraftteknikk på tittel
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Wake Modelling using an actuator disk model in openFOAM
(Master thesis, 2013)Two "Blind tests" have been performed at NTNU. Researchers were asked to send in results from a simulation of a model turbine in a wind tunnel to compare the different results with the measured values. There was a large ... -
Water absorption and dielectric properties of Epoxy insulation
(Master thesis, 2008)Characterization of Epoxy (diglycidyl ether of Bis-phenol A cured with Tri ethylene Tetra amine) without fillers was done. The Water absorption test at 95°C shows that at saturation the epoxy contains a water concentration ... -
Water Behind Capacity
(Master thesis, 2016)When the power system becomes more dependent on intermittent renewable energy, the need for ancillary services becomes larger. Therefore, the power producers ability to deliver reserves has been analysed in this thesis. ... -
Wave Energy Conversion: Direct Coupled Point Absorber in Heave with Induction Machine as Power Take Off
(Master thesis, 2007)In the area of offshore renewable, wave energy can give great contribution. There has been research for developing wave energy converters since the late eighteenth century when the first patent was applied for in 1799 [1], ... -
Wave Energy Conversion: Salter Duck Wave Energy Converter with Direct Electrical Power Conversion
(Master thesis, 2010)This master thesis describes the design, calculation, simulation and construction of a buoy shape called the Salter Duck with an internal direct electrical wave energy conversion system. The internal system consists of two ... -
Wave Energy Conversion: Simulation Verification and Linearization of Direct Drive Wave Energy Converter with Variable DC-link Voltage Control
(Master thesis, 2009)Lowering the cost of wave energy conversion is an essential task for it to succeed as a future energy resource. In this work a converter, assumed cheaper than the regular back to back converter setting, have been investigated ... -
Wave-to-Wire Model of the Wave Energy Converter Bolt2: Control and Power Extraction with an All-Electric Power Take-Off System
(Master thesis, 2012)Fred Olsen is currently testing their latest wave energy converter outside of Falmouth Bay in England, preparing it for commercial exploitation at the Wavehub-project. Previous studies have shown that this device has ... -
Weather Models for Capturing Wind Related Failures in Probabilistic Reliability Analysis
(Master thesis, 2019)Forekomsten av ekstraordinære værfenomener som ekstremvær og store stormer øker på grunn av global oppvarming. Derfor er det hensiktsmessig å inkludere værdata til probabilistiske pålitelighets- analyse-metoder for elektriske ... -
Webløsning for kommunale klima- og energiplaner
(Master thesis, 2010)Potensialet for klimagassreduksjoner gjennom lokalt initierte tiltak er beregnet å være mellom 2,5 og 8 millioner tonn CO2-ekvivalenter innen 2020. Dette utgjør 15 til 50 % av Norges mål for innenlands utslippsreduksjon, ... -
Wet Gas Airfoil Analyses
(Master thesis, 2011)Subsea wet gas compression renders new possibilities for cost savings and enhanced gas recovery on existing gas wells. Technology like this opens to make traditional offshore processing plants redundant. With new technology, ... -
Wet Gas Compressor Surge Detection
(Master thesis, 2013)The development of wet gas compressors for installation subsea is key to increase the recovery of oil and gas from the Norwegian Continental Shelf. Safe operation of the compressor depends on understanding of how wet gas ... -
Whitehead memorial lecture: Challenging defects of high voltage insulation systems
(Peer reviewed; Journal article, 2020)The primary function of a high voltage insulation system is to prevent the flow of electric current between oppositely charged conductors, facilitate heat transportation and provide mechanical support throughout a long ... -
Wind farm voltage dip measurements
(Journal article; Peer reviewed, 2014)This paper is based on continuous measurements of voltages and currents from three wind farms for a period of 1 year, and the focus is on voltage dips. The purpose is to get an overview of the characteristics and rate of ... -
Wind in the North Sea.: Effects of offshore grid design on power system operation.
(Master thesis, 2011)In this thesis a method was developed to evaluate and compare various offshore grid topology and capacity choices. A small power system was created for the purpose of the study, including prototypes of offshore grids. To ... -
Wind Powered Water Injection Systems for Oil and Gas Applications
(Master thesis, 2016)The project is focused on the modelling and control of water injection systems (WIS) in oil and gas (O&G) facilities powered by wind turbines. The use of wind power for WIS has been presented by DNV-GL as an sustainable, ... -
Wind Turbine in Yawed Operation
(Master thesis, 2011)The task of this project was to investigate the near wake, performance characteristics and yaw moment on a model wind turbine. The test turbine is a horizontal axis three bladed machine with a rotor diameter of 0.9 meter. ... -
Wind turbine wake meandering
(Master thesis, 2013)In this master thesis the meandering of the wake of a three bladed horizontal axis model wind turbine has been studied. Measurements have been conducted by the use of four hot-wire probes located at multiple nearby points ... -
Winding and Testing of Superconducting Coils
(Master thesis, 2015)Superconducting rotor windings are considered for future large offshore wind turbines for their low weight, volume and their possibility to reduce costs. In a joint European project, INNWIND.EU, a superconducting small ... -
Wireless Control of Active Gate Drivers for Silicon Carbide power MOSFETs
(Peer reviewed; Journal article, 2023)Active Gate Drivers (AGDs) enhance controllability and monitoring of switching devices, especially for fast switching Silicon Carbide (SiC) power Metal-Oxide-Semiconductor Field-Effect Transistors (MOSFETs). To support ...