Blar i Institutt for elkraftteknikk på emneord "Energi og miljø, Elektrisk energiomforming"
Viser treff 21-40 av 78
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Control Techniques of Modular Multilevel Converter
(Master thesis, 2017)This thesis aims to address the challenge of suppressing the circulating current. Principle of operation and mathematical derivations, common control methods for inner dynamics and software/hardware algorithm implementation ... -
Design and Analysis of Stationary Reference Frame Controllers for Active Front End Converter
(Master thesis, 2016)An active front end converter along with its associated control system has been the scope of this thesis. Relavant literature has been considered for identifying the operation and possible system implementations of this ... -
Design and Performance Analysis of an Electric Motor Drive utilizing Sillicon Carbide MOSFETs
(Master thesis, 2017)The recent commercialization SiC technology, has made it desirable to use SiC in electrical motor drives for marine applications, due to the superior material qualities of SiC compared to conventional Si based technology. ... -
Design and Testing of Voltage Source Inverter and Motor Control System for Electric Vehicle
(Master thesis, 2015)With fast rotating permanent-magnet motors and compact battery storage units, the high performance motorsport community has, in recent years, started to utilize the quick response and high torque of electrical drivetrain ... -
Design Optimization of Hydropower Generators
(Master thesis, 2016)For education and research purposes, a design calculation program for hydropower generators has been made. The user can change design parameters to optimize the generator. However, manual optimization is a slow and tedious ... -
Determination of AC Characteristics of Superconducting Dipole Magnets in the Large Hadron Collider Based on Experimental Results and Simulations
(Master thesis, 2017)The Large Hadron Collider (LHC) utilizes superconducting Main Dipole Magnets that bend the trajectory of the beam. The LHC ring is electrically divided into eight octants, each allocating a 7 km chain of 154 Main Dipole ... -
Developing a Numerical Model for Optimization of a Coaxial Magnetic Gear
(Master thesis, 2016)Magnetic gears have in recent years attracted a lot of interest as a potential replacement for mechanical gears in applications requiring high torque and low speed. Since the two shafts are not in direct contact undesirable ... -
Developing an Application for Simulating a Parametrized PM Machine by FEM
(Master thesis, 2016)A parametrized 2D model of a permanent magnet synchronous machine is developed in the finite elements method software COMSOL Multiphysics, along with a graphical user interface to control it. The GUI provides automatic ... -
Device-level control of microgrids with Master-Slave structure
(Master thesis, 2018)Microgrids are low voltage distribution networks comprising various distributed generators, storage devices and controllable loads that can operate as a controlled entity, either interconnected or isolated from the main ... -
Doubly-Fed Induction Machine for use in Mini-Hydro Power Plants
(Master thesis, 2016)In hydro power applications, the synchronous generator is widely used. As the speed of the synchronous generator is fixed to the frequency of the grid, the hydro turbine must operate at fixed speed independent of load and ... -
Electric-Hydraulic Interaction - Impact of Hydraulic Properties on Stability in Isolated Operation
(Master thesis, 2016)The models for hydraulic systems found in standard Power System Analysis tools are often based on simplified mathematical models. These simplifications may lead to inaccurate representations of the dynamic behaviour of ... -
Estimering av KILE-kostnader ved seksjonering og feilretting i høyspennings distribusjonsnett
(Master thesis, 2016)Det er behov for å klassifisere komponenter i høyspennings distribusjonsnett med avbruddskostnad. Denne kostnaden representerer de samfunnsøkonomiske konsekvensene ved avbrudd, og er lovfestet i «Ordningen med kvalitetsjusterte ... -
Evaluation of a Medium-Voltage High-Power Bidirectional Dual Active Bridge DC/DC Converter for Marine Applications
(Master thesis, 2017)Due to an increased focus on the development of high-power marine microgrids, new vessels are being installed with large power systems including highly fluctuating loads operating at high efficiency and low emissions. The ... -
Evaluation of Switching Characteristics, Switching Losses and Snubber Design for a Full SiC Half-Bridge Power Module
(Master thesis, 2016)In this thesis, the performance of the full Silicon Carbide (SiC) half-bridge power module BSM120D12P2C005 from Rohm Semiconductor is investigated. A laboratory circuit enabling double-pulse tests of the half-bridge module ... -
Experimental Investigation of Operational Reliability of Silicon Carbide MOSFETs
(Master thesis, 2017)As the performance of silicon power semiconductors is close to the theoretical limit, other semiconductor materials are sought to improve power electronics system efficiency. Devices made with the wide bandgap material ... -
FEM-modellering og analyse av magnetfeltet i endeområdet til store synkrongeneratorer
(Master thesis, 2016)Denne oppgaven er en videreføring av prosjektoppgaven skrevet av undertegnede høsten 2015. Under prosjektoppgaven ble det implementert en modell av en generator i analyseprogrammet Ansys Maxwell. Dette er et feltberegningsprogram ... -
Flexible distribution network - Local flexibility and aggregation
(Master thesis, 2015)The increasing intermittent production from wind power and solar-PV creates a system that is more complex to plan, control and balance. At the same time, there is an increase in power consumption due to electric vehicles, ... -
Frequency Response Presentation of Power System Components
(Master thesis, 2015)This master thesis presents a method for stability analysis. The dynamics of an electric system are described through frequency dependent impedances and admittances. This is presented with the basis of an electric traction ... -
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 ... -
Harmonic Propagation and Production in Offshore Wind Farms
(Master thesis, 2018)Modern wind farms are increasing in size and complexity. As a result, increased power injected from large offshore wind farms is having a significant impact on the stability and power quality of the grid. Harmonics are a ...