Blar i NTNU Open på forfatter "Nøland, Jonas Kristiansen"
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A Case Study of the Effects of Small Modular Nuclear Reactors on the Norwegian Power Grid, Utilizing the Nordic490 Model.
Wikesland, Jostein August (Master thesis, 2024)Denne masteroppgaven utforsker effektene små modulære kjernekrafstreaktorer (SMR) kan ha på det norske kraftsystemet, sett fra et kraftsystemperspektiv. Oppgaven undersøker potensialet SMRer har for å møte Norges voksende ... -
A Non-normal-mode Marginal State of Convection in a Porous Box with Insulating End-Walls
Tyvand, Peder A.; Nøland, Jonas Kristiansen (Journal article; Peer reviewed, 2019)The 4th order Darcy-Benard eigenvalue problem for the onset of thermal convection in a 3D rectangular porous box is investigated. We start from a recent 2D model for a rectangle with hand-picked boundary conditions defying ... -
A Non-normal-Mode Marginal State of Convection in a Porous Rectangle
Tyvand, Peder A.; Nøland, Jonas Kristiansen; Storesletten, Leiv (Journal article; Peer reviewed, 2019)The fourth-order Darcy–Bénard eigenvalue problem for onset of thermal convection in a 2D rectangular porous box is investigated. The conventional type of solution has normal-mode dependency in at least one of the two spatial ... -
Adaptive Neural Network-based PSS Designs for Modern Power Systems
Grong, Thomas (Master thesis, 2020)Når andelen av fornybar energi i et kraftsystem øker, endres systemets egenskaper på en merkbar måte. Fornybare energikilder som solcelleanlegg og vindturbiner skaper mer hyppige forstyrrelser, men bidrar ikke til å ... -
Analysis and Optimization of a Passive Magnetic Bearing
Tungesvik, Sindre (Master thesis, 2020)Abstract will be available on 2023-06-15 -
Analytical Iron Loss Evaluation in the Stator Yoke of Slotless Surface-Mounted PM Machines
Leandro, Matteo; Elloumi, Nada; Tessarolo, Alberto; Nøland, Jonas Kristiansen (Peer reviewed; Journal article, 2022)One of the attractive benefits of slotless machines is low losses at high speeds, which could be emphasized by a careful stator core loss assessment, potentially available already at the pre-design stage. Unfortunately, ... -
An Analytical Model for Detailed Transient Fault Analysis of Doubly-Fed Induction Machines
Maurer, Frederic; Nøland, Jonas Kristiansen (Chapter, 2020)This paper presents an exact analytical solution to the two-phase and three-phase short-circuit events of the doubly-fed induction machine (DFIM). The contribution is intended to strengthen the predictability of DFIMs under ... -
Analytical PM Eddy Currents Loss Evaluations in Inverter-Fed Slotless Machines Induced by SVM Control Using Polar Coordinates Formulations
Leandro, Matteo; Nøland, Jonas Kristiansen (Peer reviewed; Journal article, 2023)Space vector modulation (SVM) is a widespread method for controlling PM machines. However, the switching harmonics contribute to eddy current losses in the magnet region. In the analytical modeling of slotless PM machines, ... -
An Analytical Prediction Model of Balanced and Unbalanced Faults in Doubly-Fed Induction Machines
Maurer, Frédéric; Nøland, Jonas Kristiansen; Toftevaag, Trond Leiv (Peer reviewed; Journal article, 2022)This paper presents the exact transient solution to the unbalanced and balanced faults in the doubly-fed induction machine (DFIM). Stator currents, rotor currents, and stator fluxes have been validated using simulation and ... -
Analytical-Based Iron Loss Assessment in the SPM Slotless Machine Stator Core
Leandro, Matteo; Nada, Elloumi; Tessarolo, Alberto; Nøland, Jonas Kristiansen (Chapter, 2020)The use of slotless machines has acquired growing interest when features such as low vibrations and noise, along with low losses at high speed, are required. However, a careful assessment of the iron losses in the stator ... -
An Approach for Optimal Pre-Conditioning of the Analytical Field Solution of Slotless PM Machines
Leandro, Matteo; Nøland, Jonas Kristiansen (Peer reviewed; Journal article, 2021)Analytical modeling of electrical machines has the advantage of remarkable computational efficiency when compared with finite element analysis (FEA). This is especially important for slotless topologies, as they are well ... -
Assessing the Feasibility of Developing a High-Speed SynRM by Using a Compound Analytical/FEA-Assisted Design Algorithm
Carlsen, Tord Traa (Master thesis, 2021)Abstract will be available on 2024-02-01 -
Assessing the Impacts of Flexible Operation Strategies on Classical Hydropower Generators for Advancing the Energy Transition
Karekezi, Yannick Cyiza (Doctoral theses at NTNU;2024:333, Doctoral thesis, 2024)The worldwide energy transition from fossil fuel to renewable energy has disrupted the power and energy sectors, which results in new challenges and opportunities. This thesis focuses on the optimization of reactive power ... -
Back-to-Back Based Voltage Control of an Isolated Grid Supplied by a Hydro Turbine Driven Induction Generator
Krakk, Eivind (Master thesis, 2020)Dagens samfunn er heilt avhengig av elektrisitetsforsyning. Samankopla transmisjonsnett er lett tilgjengelege over heile verda. Likevel, i rurale områder utan nokon form for eksisterande nettinfrastruktur, kan eit isolert ... -
Comparison of AC-Superconducting Multi-Phase Symmetric-Winding Topologies for Wind Power Generators with PM Rotors
Tome Robles, Dany Josue; Nilssen, Robert; Nøland, Jonas Kristiansen (Peer reviewed; Journal article, 2022)In this paper, an AC superconducting multi-phase symmetric-winding machine is designed for a wind power generator to improve its performance and reduce losses, where four handpicked topological designs were explored and ... -
Coordinated Multi-objective tuning of PSS and AVR
Hansen, Vard Nes (Master thesis, 2021)Spenningsregulatoren (AVR) i en generator sørger for å holde terminalspenningen konstant ved å regulere feltspenningen som tilføres feltviklingene. Synkrongeneratorer kan utstyres med dempetilsats (PSS) som motvirker ... -
Correlation challenges for North Sea offshore wind power: a Norwegian case study
Hjelmeland, Martin N.; Nøland, Jonas Kristiansen (Peer reviewed; Journal article, 2023)Offshore wind power projects are currently booming around the North Sea. However, there are inherent correlation challenges between wind farms in this area, which has implications for the optimal composition of locations ... -
Design and analysis of a 2.5 MW Coreless Aero Generator for Hybrid-Electric Aircraft
Mikkelsen, Eirik Kvåle (Master thesis, 2023)Denne avhandlingen presenterer design og analyse av en høyhastighets 2,5 MW spor- løs generator for bruk i hybrid-elektriske fly. De sporløse statorviklingene er basert på Alva Industries FiberPrinting-teknologi og består ... -
Design of a Power-Dense Aviation Motor With a Low-Loss Superconducting Slotted Armature
Mellerud, Runar; Hartmann, Christian Magnus; Klop, Casper Leonard; Austad, Sindre; Nøland, Jonas Kristiansen (Peer reviewed; Journal article, 2023)This article describes the design and analysis of a 2.5-MW, 5000-rpm electric motor with a slotted armature employing REBCO high-temperature superconductors (HTS). The alternating current and field in the armature induces ... -
Design- and Optimization Analysis of a Modular Thermal Storage System for a Nuclear Power Plant
Grotle, Anders Olai; Dyrkolbotn, Simen (Master thesis, 2024)Betydningen av fornybare energikilder har aldri vært større i jakten på å oppnå Net Zero-målet innen 2050. Overgangen bort fra fossile brensler som kull og gass er allerede i gang, med installasjon av nye vindturbiner, ...