Browsing Institutt for elkraftteknikk by Title
Now showing items 940-959 of 2571
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Factors influencing the tangential AC breakdown strength of solid-solid interfaces
(Journal article; Peer reviewed, 2016)The combination of two solid dielectrics (interface) increases the risk of formation of microscopic cavities reducing the breakdown strength (BDS) of the interface considerably, particularly when the electric field has ... -
Failure analysis and lifetime assessment of IGBT power modules at low temperature stress cycles
(Peer reviewed; Journal article, 2021)Lifetime models of high‐power Insulated Gate Bipolar Transistors modules express the number of cycles to end of life as a function of stress parameters. These models are normally developed based on experimental data from ... -
Fasekompensering i regionalnett ved bruk av kondensatorbatteri
(Bachelor thesis, 2020)Formålet med denne oppgaven er å utarbeide en fremgangsmetodikk for plassering av kondensatorbatteri ved bruk av simuleringsprogrammet NetBas. Dette er utført på bakgrunn av at Eidefoss vil optimalisere den reaktive flyten ... -
Fast Decomposed Energy Flow in Large-Scale Integrated Electricity-Gas-Heat Energy Systems
(Journal article; Peer reviewed, 2018)In this paper, a new decomposing strategy is proposed to solve the power flow problem in the large-scale multienergy carrier (MEC) systems, including gas, electrical, and heating subnetworks. This strategy has been equipped ... -
Fast protection against islanding and unwanted tripping of distributed generation caused by ground faults
(Chapter, 2017)Ground faults (GF) in a feeder with interconnected distributed generation (DG) might lead to overvoltages in healthy phases even after feeder disconnection from a substation, obstacles for reclosing schemes, and safety ... -
Faster decarbonization of heavy industries in low-carbon power grids: Using process flexibility for handling grid congestions
(Journal article; Peer reviewed, 2024)Industrial decarbonization requires substantial electricity and grid infrastructure. Policies are developed and significant funds are being directed to decarbonize electricity generation and incentivize investments in ... -
Fault Detection and Prediction in Smart Grids
(Chapter, 2018)Modern society is to a larger and larger extent dependant on electric energy, and hence the reliance on and utilization of the electric grid is increasing steadily. At the same time the production and consumption patterns ... -
Fault Localization in Medium Voltage Distribution Networks with Distributed Generation
(Doktoravhandlinger ved NTNU, 1503-8181; 2011:182, Doctoral thesis, 2011)Being part of a larger research project named “Distribution 2020”, the focus of this work has been on increasing the automation of the fault handling in distribution networks, taking into consideration the increasing number ... -
Fault Ride Through Capability Analysis of Small-Scale Hydro Power Plants
(Master thesis, 2016)This master thesis has looked upon the fault ride through capability assessment for small-scale hydro power plants in the distribution grid. In this report, the shape of the voltage dip has been studied, and the voltage ... -
Fault Tolerant Modular Multilevel Converter: Investigation of a New Method for Fault Tolerant Control
(Master thesis, 2014)In this thesis work, fault tolerant control and operation of a Modular Multilevel Converter (MMC) has been investigated. The MMC consists of multiple Sub Modules (SM). The MMC technology is rapidly evolving, and research ... -
Feasibility investigation for the application of direct AC-AC conversion in offshore wind power based on a comparative evaluation
(Master thesis, 2010)In this thesis a feasibility study of a direct AC-AC converter for wind power application has been performed. Two three-phase voltages are converted to a single phase square wave for input to a high-frequency transformer ... -
Feasibility of Space Charge Measurements on HVDC Cable Joints: Study Group-IEEE DEIS Technical Committee 'HVDC Cable and Systems:'
(Peer reviewed; Journal article, 2022)This is the first time that the feasibility of space charge measurements on full-sized HVDC cable joints has been explicitly considered. In this article we also consider whether the PEA and TSM techniques could be used. -
Feasibility Studies on a Stand-Alone Hybrid Wind-Diesel System for Fish Farming Applications
(Master thesis, 2017)This thesis aims to explore feasibility related to implementing a Hybrid Wind-Diesel System for an offshore fish farm. The primary motivation behind this is to exploit the excellent wind resources along the Norwegian coast ... -
Feasibility Studies on Integrating Offshore Wind Power with Oil Platforms
(Master thesis, 2011)This thesis is centered around the possibilities of integrating offshore wind power together with oil and gas platforms. The motivation behind this topic is to reduce the emissions of CO2 and other pollutive gases from ... -
Feeder selection algorithms for high-impedance faults in resonance grounded distribution systems
(Master thesis, 2021)Høyspente distribusjonsnett med spolejording har tradisjonelt sett benyttet den stasjonære Wattmetriske algoritmen til å identifisere avgangen med jordfeil. Likevel har metoden vist seg å være utilstrekkelig, noe som har ... -
Feilanalyse av transformator i vindturbiner
(Bachelor thesis, 2023)Transformatoren er en viktig komponent i en vindturbin, og en av komponentene som blir mest belastet. Feilraten for disse har vært betydelig høyere sammenlignet med konvensjonelle distribusjonstransformatorer. Derfor er ... -
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 ... -
FES and VRLA Battery in Uninterruptible Power Supply - Comparison between Flywheel Energy Storage and Valve-Regulated Lead-Acid Batteries in Uninterruptible Power Supply
(Master thesis, 2015)Sensitive electronics components are presently ubiquitous, taking on an ever-growing amount of tasks previously handled by human operators. This is obvious in modern industry with ever-increasing automation as well as ... -
Finite Control Set Model Predictive Control in Power Converters
(Master thesis, 2013)This study presents a detailed description of a cost function-based predictive control strategy called Finite Control Set Model Predictive Control (FCS-MPC) and its applications to the control of power electronics converters. ... -
Fixed Speed Electric Motor Drives for LNG Refrigeration Compressors.: Back-to-Back Starting Methods and Grid Consequences.
(Master thesis, 2009)Experimental studies as well as simulations have been performed on the Back-to-Back starting schemes low frequency-, partial frequency-, and soft -start-up. A Back-to-Back configuration of two synchronous machines has been ...