Browsing Institutt for elkraftteknikk by Title
Now showing items 1022-1041 of 2565
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Gaining insight into solar photovoltaic power generation forecasting utilizing explainable artificial intelligence tools
(Peer reviewed; Journal article, 2020)Over the last two decades, Artificial Intelligence (AI) approaches have been applied to various applications of the smart grid, such as demand response, predictive maintenance, and load forecasting. However, AI is still ... -
GaN-based, High-frequency Converter for Use in Auxiliary Power Supplies for MVDC Converters
(Master thesis, 2024)De siste årene har galliumnitrid (GaN) teknologien hatt betydelig fremskritt og etablert seg som en viktig brikke i utviklingen av høyfrekvens omformere. GaNs overlegne elektronmobilitet og evne til høy gjennomslagsspenning ... -
Gasskraftverk Kårstø
(Master thesis, 2007)Denne diplomoppgaven er skrevet i samarbeid med Statnett. Naturkraft har under bygging et gasskraftverk på Kårstø i Rogaland. Dette er et såkalt combined-cycle-kraftverk (kombinert kraftverk), som består av en gassturbin ... -
Gate driver design for normally-off SiC JFET: Silicon Carbide technology for PV inverters
(Master thesis, 2011)In this thesis a research on modern SiC semiconductor devices is made with a bias on the driving methods and requirements. A compact two-stage gate driver circuit for SiC VJFET is developed, the transistor is characterized ... -
Gate driver, snubber and circuit design considerations for fast-switching series-connected SiC MOSFETs
(Journal article; Peer reviewed, 2024)Series connection of Silicon Carbide (SiC) Metal-Oxide-Semiconductor Field-Effect Transistors (MOSFETs) is an interesting solution to design switches for voltages that are not yet commercially available or limited for ... -
Gate-Drive Circuits for Adaptive Operation of SiC MOSFETs
(Peer reviewed; Journal article, 2024)This paper presents two novel adaptive gate driving concepts for Silicon Carbide (SiC) metal oxide semiconductor field-effect transistors (MOSFETs). The first concept is based on the adaptive over-driving principle and ... -
Gauss-Newton: A prediction-error-gradient based algorithm to track PMSM parameters online
(Chapter, 2021)Online adaptation of temperature-sensitive motor parameters is of significance for the electric drives in reliability-critical applications. Recursive prediction error method (RPEM) is widely used for this purpose. ... -
Gearing as a part of an Electric Machine Functionally - Study and optimization of a partitioned stator switched flux permanent magnet machine
(Master thesis, 2017)The idea to couple a gear magnetically has been around for some time, and has gained increased interest in recent years. By manipulating air gap field harmonics, magnetic gearing has been shown to have comparative, or even ... -
Generalized and Reduced Analytical Formulation for Ultra-Fast 3-D Field and Vector Potential Calculation from Arch-Shaped Axially Magnetized Bodies in Electrical Machines
(Peer reviewed; Journal article, 2020)Arch-shaped axially magnetized bodies tend to appear frequently in electrical machine analysis such as in overhang parts of classical radial-flux machines as well as in main parts of axial-flux machines. The calculation ... -
Generalized Voltage-based State-Space Modelling of Modular Multilevel Converters with Constant Equilibrium in Steady-State
(Journal article; Peer reviewed, 2018)Abstract: This paper demonstrates that the sum and difference of the upper and lower arm voltages are suitable variables for deriving a generalized state-space model of an MMC which settles at a constant equilibrium in ... -
Generation system adequacy studies in the presence of wind energy resources
(Master thesis, 2018)Variable renewable energy sources like wind power are in exponential growth worldwide. One of the major challenges regarding high penetration of wind energy in the power system is the degradation of generation adequacy due ... -
Generator design for vertical axis wind turbine
(Master thesis, 2010)The optimization process for generators are often done for rated speeds and torques. This thesis will discuss and show optimization of a vertical axis wind turbine generator that has a given wind profile. Although the rated ... -
Generator response following as a primary frequency response control strategy for VSC-HVDC connected offshore wind farms
(Journal article; Peer reviewed, 2017)As penetration of renewable energy sources increases, the proportion of synchronous generators with rotating masses directly coupled to the grid decreases. In the case of wind generation, the kinetic energy stored in the ... -
Geomagnetic Induced Current Effects on Power Transformers
(Master thesis, 2016)Solar storms are inevitable and have a number of negative effects on technological systems, the power grid being no exception. High geoelectric field values due to severe geomagnetic storms cause geomagnetic induced currents ... -
Go Real: Power Electronics From Simulations to Experiments in Hours: Versatile Experimental Tool for Next Generation Engineers
(Peer reviewed; Journal article, 2020)The only constant is change-power systems worldwide are going through a paradigm change from centralized generation to distributed generation; transportation systems are being electrified; and billions of lives in third-world ... -
Gradient based optimization of Permanent Magnet generator design for a tidal turbine
(Chapter, 2014)An optimization of an analytical problem with nine variables is executed to find the optimal Permanent Magnet(PM) generator for a tidal turbine. A gradient based solver is used to find the minimum cost of active materials ... -
Green and hybrid microgrid for rural electrification
(Chapter, 2017)Green power generation technologies' interconnection to form hybrid Microgrids are seen as promising option for rural electrification in developing countries like Nepal. The use of distributed energy resources like ... -
Green or blue? Enabling industrial decarbonization and demand response with hydrogen for high temperature process heating
(Chapter, 2023)Vinyl chloride monomer production coupled with chlor-alkali electrolysis is an industrial process that requires high temperature process heat. One option for providing this process heat in a decarbonized energy system is ... -
Grey-box modelling of a domestic hot water tank to be used for flexibility services
(Master thesis, 2022)Fornybar produksjon kan gi utfordringer i kraftnettet, som for eksempel ubalanse mellom produksjon og etterspørsel. Energilagring og nettforsterkning kan løse dette problemet, men er kostbare tiltak. Fornybar produksjon ... -
Grid Connected Photovoltaic Systems with SmartGrid functionality
(Master thesis, 2013)SummaryThis master?s thesis is focused on the design of grid connected PV power stage inverter. This inverter will be used for solar power application in the renewable energy laboratory at NTNU. The designed power stage ...