Blar i Institutt for elkraftteknikk på emneord "Energi og miljø, Elektrisk energiomforming"
Viser treff 61-78 av 78
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Optimal Frequency of Silicon Carbide Power Correction Circuits for On-Board Chargers
(Master thesis, 2016)Compact high-efficiency power converters is a hot topic in electrical power engineering. So is also the case for electric and plug-in hybrid electric vehicle battery chargers. Increasing the switching frequency in the power ... -
Optimal utnyttelse og drift av distribusjonstransformatorer basert på AMS og Smartgrid-teknologi
(Master thesis, 2016)Denne besvarelsen har kommet med forslag til metoder for å optimalisere driften av distribusjonstransformatorer ved hjelp av trådløse målere og kontinuerlig overvåkning. Forarbeidet i prosjektoppgaven undersøkte nytten av ... -
Optimum Configuration of the Dogger Bank Reference Wind Farm Grid with Consideration for Reliability
(Master thesis, 2016)Offshore wind energy has become a major part of the European energy mix, and new and improved technology enables the construction of wind farms with larger installed capacity. One of these large scale projects that has ... -
Power Electronics in Low-Voltage DC Circuit Breakers
(Master thesis, 2017)Low-voltage direct current (LVDC) microgrid has recently been recognized as a feasible solution for next generation electrical power distribution network, due to several benefits that it offers an increasing amount of ... -
Power Factor Correction for a Bidirectional On-Board Charger for Electric Vehicles and Plug-in Hybrid Electric Vehicles - A fundamental study of the bidirectional totem-pole PFC
(Master thesis, 2018)With the beginning implementation of a smart grid in industrialized countries increasing the load flexibility of customers, as well as communication with the grid operators, a potential market for bidirectional on-board ... -
Power quality studies of a Stand-alone Wind-powered Water Injection System without Physical Inertia
(Master thesis, 2017)The purpose of this thesis is to study the power quality in a stand-alone wind- powered water injection system for enhanced oil recovery. Water injection is crucial for boosting the recovery rate in mature oil reservoirs. ... -
Reliability-based Reserve Connections in the Sheringham Shoal Offshore Wind Farm - A Technical-Economical Evaluation of Increasing the Reliability in an Existing Offshore Wind Farm
(Master thesis, 2016)Offshore wind has become one of the fastest growing renewable energy sources over the last twenty years. It has the advantage of having great energy generating capabilities, which may be of good value for the energy ... -
Reversible magnetically geared machine
(Master thesis, 2017)Magnetic gears have gained increasing interest over the past few years for replacing mechanical gears in different applications. With no contacting parts, the magnetic gear eliminates typical problems with friction, ... -
Reversible magnetically geared machine
(Master thesis, 2017)Magnetic gears have gained increasing interest over the past few years for replacing mechanical gears in different applications. With no contacting parts, the magnetic gear eliminates typical problems with friction, ... -
Rotor Design of Permanent Magnet Synchronous Machine for Pumped-storage Plant
(Master thesis, 2015)This master thesis is partly a deeper study of which was presented in the specialization project, fall of 2014. The main objective have been to develop and design a permanent magnet synchronous machine for hydro power plant ... -
Sammenligning av feilstatistikk mellom nettselskaper - Med utgangspunkt i kostnadsnormen og bruk av GIS
(Master thesis, 2017)Distribusjonsnettet i Norge er delt inn i 139 konsesjonærområder. Hver av disse er pålagt av NVE å rapportere data om feil og avbrudd. På grunn av rivende utvikling innenfor datateknologi knyttet til "det digitale skiftet" ... -
Sensorless Control of Synchronous Machines Used in Adjustable Speed Hydro
(Master thesis, 2018)For some high power applications, as for instance in adjustable speed hydro, ASH, synchronous machines are used for power generation. In this master`s thesis, flux models and sensorless control methods for a synchronous ... -
Solid State Circuit Breakers In Medium Voltage Direct Current Systems - Designing, improving and optimizing solid state circuit breakers for MVDC applications
(Master thesis, 2018)In this text three different solid state circuit breakers (SSCB) for medium voltage direct current (MVDC) systems have been investigated, namely the interrupting, the current limiting and the resistive topologies. In ... -
Synthetic Inertia from a Converter-Fed Synchronous Machine in a Hydro-Electric Power Plant - Modeling, Control and Analysis
(Master thesis, 2018)As the share of variable renewable energy in the power system rises, the demand for balancing technologies to compensate for fluctuation in production increases. Pumped-storage hydropower has significant potential globally ... -
Test av litium-ion batterier for transportmidler med høy belastning- og fokus på varmeutvikling
(Master thesis, 2017)Revolve NTNU har de siste årene bygget en bil som både går fortere og er lettere. For at dette skal skje blir alle komponenter i racerbilen presset til sitt ytterste. Dette har medført at batteripakken, som er den tyngste ... -
Transient Stability in Subsea PMSM with Damper Windings - Using Finite Element Method Simulations to Identify the dq-circuit Parameters of a PMSM with a Damper Winding Sleeve
(Master thesis, 2016)Today, induction machines dominate the market for electrical machines in industrial pumping applications. This is also the case for subsea pumping applications. Permanent magnet machines are showing great promise for taking ... -
Variable Flux Permanent Magnet Synchronous Machines: Building and Testing Simple Designs with High-Coercivity Magnets
(Master thesis, 2018)Variable flux permanent magnet synchronous machines (VF-PMSMs) use a novel operation concept based on changing the magnetization level of the permanent magnets in accordance with variations in speed and torque. This may ... -
Virtual Impedance Techniques for Power Sharing Control in AC Islanded Microgrids
(Master thesis, 2018)This thesis focuses on power sharing in low-voltage, islanded ac microgrids. It is motivated by the challenges related to climate change. To achieve a successful integration of renewable energy resources in the power grid, ...