Blar i NTNU Open på forfatter "Nilsen, Roy"
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Evaluation and Comparison between Multilevel Converters for Variable Speed Operation of Pumped Storage Power Plants with Full-size Converters
Tiwari, Raghbendra; Nilsen, Roy; Nysveen, Arne (Chapter, 2021)This paper compares the full-size converter topologies for the converter fed synchronous machines which can enable the fixed speed pumped storage power plant to variable speed operation. Three converter topologies: Neutral ... -
Evaluation of Power Losses and Ruggedness of SiC MOSFETs for use in High-Power High-Frequency Induction Heating Generators
Haukelidsæter, Knut (Master thesis, 2018)As the Si IGBTs are confronting its physical limitations when it comes to high-frequency high-power applications, the SiC MOSFET sails up as a promising substitute due to its material properties. However, in the process ... -
FPGA based motor controller with sensorless control, used for electrical fuel pumps with high rotational frequency
Fjøsne, Amund (Master thesis, 2021)Abstract will be available on 2024-06-14 -
FPGA-Based Real-Time Emulator of Permanent Magnet Synchronous Motor
Moldskred, Anders (Master thesis, 2020)Denne oppgaven er del av et prosjekt på Institutt for elkraftteknikk ved NTNU for utvikling av en sanntids FPGA-basert emulator av en permanent-magnet synkronmotordrift som skal kjøres på NTNU Control Platform. ... -
FPGA-based real-time modeling of active front end (AFE)
Einarsen, Kristel Storvik (Master thesis, 2023)I den voksende sektoren for fornybar energi har nye innovative kontrollmetoder blitt forsket på i lang tid. Denne rapporten tar for seg aktiv likeretter koblet til et kraftnett via et LCL-filter. I utviklingen av ... -
A Framework and an Open-Loop Method to Identify PMSM Parameters Online
Perera, Aravinda; Nilsen, Roy (Chapter, 2020)A method for online adaptation of electric parameters of a rotating machine is proposed herein. The concept adopts the recursive prediction error method (RPEM) for parameter adaptation, that exploits the prediction-error ... -
Frequency Converter Solutions and Control Methods for Varible Speed Operation of Pumped Storage Plants
Tiwari, Raghbendra (Doctoral theses at NTNU;2023:399, Doctoral thesis, 2023)Pumped storage hydropower plants (PSHP) are widely used for bulk energy storage around the world. The variable speed operation of these plants further enables their capability to regulate the power in pump mode as well. ... -
Full Speed Range Sensorless IPMSM Drive Enhanced with Online Parameter Identification
Perera, Aravinda; Nilsen, Roy (Chapter, 2021)This paper aims to combine the state-of-the-art parameter-adaptation and state-estimation techniques to realize an adaptive and sensorless interior permanent magnet synchronous machine (IPMSM) drive that offers robust ... -
Full Speed Range Sensorless IPMSM Drive Enhanced with Online Parameter Identification
Perera, Aravinda; Nilsen, Roy (Chapter, 2021)This paper aims to combine the state-of-the-art parameter-adaptation and state-estimation techniques to realize an adaptive and sensorless interior permanent magnet synchronous machine (IPMSM) drive that offers robust ... -
Gauss-Newton: A prediction-error-gradient based algorithm to track PMSM parameters online
Perera, Aravinda; Nilsen, Roy (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. ... -
Inductor Design for Filter Applications with high dV/dt
Solbakken, Yngve Berset (Master thesis, 2016)The work in this report has consisted in the design of three different inductors to verify how conductor profile impact stray capacitance, and how stray capacitance impact filtering performance. The three conductor ... -
Influence of Converter Topology and Carrier Frequency on Airgap Field Harmonics, Magnetic Forces, and Vibrations in Converter-Fed Hydropower Generator
Valavi, Mostafa; Devillers, Emile; Le Besnerais, Jean; Nysveen, Arne; Nilsen, Roy (Journal article; Peer reviewed, 2018)This paper investigates the effects of converter-fed operation on magnetic forces and vibration in a hydrogenerator. The variable-speed hydrogenerator (in a pumped-storage power plant) is a large synchronous machine with ... -
Intelligent Frequency Support for Offshore Wind
Madsen, Øyvind Kvalheim (Master thesis, 2023)Med den økende etterspørselen etter fornybare energikilder, blir vind energi mer og mer utnyttet i moderne energinett, og som et resultat kreves det at vindturbiner m˚a bidra til frekvensstøtte. Vind turbiner i en vindpark ... -
Investigation of magnetic field and radial force harmonics in a hydrogenerator connected to a three-level NPC converter
Valavi, Mostafa; Nysveen, Arne; Nilsen, Roy (Chapter, 2017)This paper investigates spatial and time harmonics of flux density and radial force distributions in the airgap of a hydrogenerator with fractional-slot windings. Hydrogenerator is connected to a neutral-point-clamped (NPC) ... -
Investigation of Open-Loop Predictor Implementation Methods for Online Parameter Estimation of IPMSM
Perera, Aravinda; Nilsen, Roy; Haugan, Thomas Sagvold (Chapter, 2022)Due to the sensitivity to parametric errors, open-loop current predictor-based estimators offer good online tracking of electric machine parameters, however at the price of rotor-speed dependent predictor pole-trajectories, ... -
Lab Setup and Testing of Lithium-Ion Batteries with Focus on Dynamic and Aging Modeling
Molund, Eirik (Master thesis, 2013)This report presents the work on making a lab setup for testing of different types of batteries in the energy storage lab at NTNU/SINTEF. A complete lab setup has been made and two different LiFePO4 chemistry cells of size ... -
Magnetic Modelling of Saturated IPMSMs, for Improved Torque Estimation and Accurate MTPA Control
Klyve, Øyvind Sommer (Master thesis, 2021)En utfordring for å oppnå optimal kontroll av synkronmotorer med nedgravde permanentmagneter, er å utvikle nøyaktige magnetiske modeller som beskriver forholdet mellom de påførte strømmene og de resulterende fluksforslygningene ... -
Modeling and Control of a DC-grid Hybrid Power System with Battery and Variable Speed Diesel Generators
Syverud, Tron Hansen (Master thesis, 2016)Hybrid electric power systems (HPS) have successfully been integrated in the road-traffic industry due to enhanced efficiency and environmental benefits. Recently this concept has been implemented in the marine sector. In ... -
Modeling of a Maritime DC-distribution System Supplied from a Diode Rectifier Connected Synchronous Generator
Ytrehus, Arve Starheim (Master thesis, 2019)Strenge utslippsreglement har blitt introdusert i den maritime sektor av den Internasjonale Maritime Organisasjon. Ny og eksiterende teknologi er analysert med høyt fokus på å utvikle mer miljøvennlige løsninger. DC ... -
Modeling, simulation and implementation of Multi-phase Induction Motor Drives.
Thopate, Sachin (Master thesis, 2011)The results obtained in the simulations and the actual results that are observed on the SPIM drive for the DSFCC strategy are in agreement. The operations of the control strategies during the extreme conditions were tested ...