Blar i NTNU Open på forfatter "Nysveen, Arne"
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Control Methods for Operation of Pumped Storage Plants With Full-Size Back-to-Back Converter Fed Synchronous Machines
Tiwari, Raghbendra; Nilsen, Roy; Mo, Olve; Nysveen, Arne (Peer reviewed; Journal article, 2023)A full-size converter-fed synchronous machine (CFSM) technology is emerging as the most flexible system for pumped storage plants for efficient operation in a wide range of water flows, which is not the case in existing ... -
Design and Manufacturing of a Twin Harmonic Machine with Counter-rotating Rotors
Bergesen, Samson (Master thesis, 2022)Konseptet med å drive to rotorer som kan rotere i separate retninger i samme stator ved å bruke harmoniske komponenter i et konsentrert viklingsoppsett i en overflatemontert permanentmagnetmotor har blitt undersøkt. ... -
Design and Operation Investigations for large Converter-Fed Synchronous Machines in Hydropower Applications
Engevik, Erlend Løklingholm (Doctoral theses at NTNU;2019:194, Doctoral thesis, 2019)The work presented in this thesis deals with design and operation investigations for large converter-fed synchronous machines in hydropower applications. It is shown that the optimal rated frequency that gives the lowest ... -
Design Optimization of Hydropower Generators
Hestengen, Truls Even (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 ... -
Design optimization of ironless multi-stage axial-flux permanent magnet generators for offshore wind turbines
Zhang, Zhaoqiang; Nilssen, Robert; Muyeen, S.M.; Nysveen, Arne; Al-Durra, Ahmed (Journal article; Peer reviewed, 2017)Direct-driven ironless-stator machines have been reported to have low requirements on the strength of the supporting structures. This feature is attractive for offshore wind turbines, where lightweight generators are ... -
Detailed Magnetic Field Monitoring of Short Circuit Defects of Excitation Winding in Hydro-generator
Ehya, Hossein; Nysveen, Arne; Groth, I. L.; Mork, Bruce A. (Chapter, 2020)The excitation windings of the synchronous generators are generally reliable. However, electrical, mechanical, and thermal stresses that the machine is exposed to during its operation leads to the inter-turn and ground ... -
Deteksjon av rotorfeil under drift i vannkraftgeneratorer
Ebbing, Johan Henrik Holm (Master thesis, 2019)Denne masteroppgaven har undersøkt hvordan rotorfeil kan oppdages i vannkraftgeneratorer ved å måle klemmespenning og ankerstrøm. Det ble gjennomført forsøk på en 100 kVA laboratoriegenerator med 14 poler der vindinger i ... -
Eddy Current Loss in Grain-Oriented Steel Laminations due to Normal Leakage Flux
Wang, Wei; Nysveen, Arne; Magnusson, Niklas (Peer reviewed; Journal article, 2021)Leakage flux penetrating laminated iron cores in power transformers and large generators induces eddy current and local loss. Due to the strong magnetic anisotropy of the lamination structure, the penetrating flux tends ... -
Effects of lifting reactance requirements on the optimal design of converter-fed synchronous hydrogenerators
Engevik, Erlend L.; Nysveen, Arne; Valavi, Mostafa; Hestengen, Truls (Chapter; Peer reviewed, 2017)The maximum allowed per unit value of the synchronous reactance of a synchronous generator is normally decided by the grid codes in order to maintain the stability of the system. For the converter-fed synchronous hydrogenerator, ... -
Electric Heating of Subsea Pipelines: Design and Testing of an Applicable Ring Core Transformer
Solheim, Kristian Thinn (Master thesis, 2013)As it becomes profitable to extract oil and gas from smaller and smaller reservoirs, jumpers (t-offs) connected to the main pipelines become necessary. This master?s thesis has investigated a simple transformer design which ... -
Electromagnetic analysis and electrical signature-based detection of rotor inter-turn faults in salient-pole synchronous machine
Valavi, Mostafa; Jørstad, Kari Gjerde; Nysveen, Arne (Journal article; Peer reviewed, 2018)In this paper, rotor inter-turn faults in salient-pole synchronous machines are investigated using finite-element analysis. The machine under study is a 22 MVA eight-pole hydropower generator with fractional-slot windings. ... -
Electromagnetic field calculation and power loss evaluation in power transformers - Analysis of Leakage Fields and Stray Losses under Special Operation Conditions
Wang, Wei (Doctoral theses at NTNU;2022:395, Doctoral thesis, 2022)The PhD research work presented in this thesis deals with electromagnetic field calculation and loss evaluation in power transformers under special operation conditions. The special loading conditions under investigation ... -
EMC analyse ved Finnfjord smelteverk
Holsen, Martin Sagedal (Master thesis, 2011)I denne rapporten er det utført en analyse av deler av det elektriske anlegget ved Finnfjord smelteverk. Analysen har blant annet gått ut på å klarlegge årsaken til utfallet av en 110 V DC-styrekrets og et overslag på ... -
End-region losses in large hydropower generators
Fagermyr, Børge Johannes (Master thesis, 2022)Store generatorer kan oppleve delvis eller fullstendig oppheting i generatorens endeområde under visse forhold. Lekkfluks i generatorens endeområde kan inneha en betydelig aksiell komponent som trenger gjennom endedelen ... -
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 Magnetic Leakage Field and the Need for Screening with Respect to Induction Power Transfer (IPT) System
Venvik, Jon-Inge (Master thesis, 2014)This report considers a system for transferring electric power from shore to ships for charging of electrical driven ferries by use of induction power transfer (IPT). The IPT works by leading an alternating current through ... -
An Expeditious Algorithm for Identification and Classification of Rotor Faults in Salient Pole Synchronous Generators
Ehya, Hossein; Nysveen, Arne; Akin, Bilal; Gyftakis, Konstantinos N. (Peer reviewed; Journal article, 2023)Providing secure electricity depends on the reliable operation of the synchronous generators in power plants. Interturn short-circuit (ITSC) and dynamic eccentricity (DE) faults are among the most prevalent fault types in ... -
Experimental Determination of Losses in MgB2 Superconductors for Wind Turbine Applications
Moslått, Lars-Erik (Master thesis, 2017)Superconducting generator field windings are suggested for the next generation of wind turbines. The foreseen wind turbines with power ratings greater than 10 MW give raise to technical challenges. Superconducting field ... -
Fabrication of a scaled MgB2 racetrack demonstrator pole for a 10 MW direct drive wind turbine generator
Magnusson, Niklas; Eliassen, J. C.; Abrahamsen, Asger B; Hellesø, Svein Magne; Runde, Magne; Nysveen, Arne; Moslått, Lars-Erik; Bjerkli, Jarle; King, Patrick (Journal article; Peer reviewed, 2018)Field windings made of MgB2 wires or tapes are considered for their potential to reduce volume, weight and cost of large offshore wind turbine generators. To gain experience of how to use this relatively new material in ... -
FEM-modellering og analyse av magnetfeltet i endeområdet til store synkrongeneratorer
Stokland, Tobias Forseth (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 ...