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Virkningen av usikkerhet i brenselspriser på lønnsomheten av mellomlandsforbindelsene til Tyskland og Storbritannia
(Master thesis, 2014)For å øke fleksibiliteten i det nordiske kraftsystemet planlegger Statnett å investere i to nye kabler til kontinentet - en kabel til Tyskland (1400 MW, 2018) og en til Storbritannia (1400 MW, 2020). Lønnsomhetsanalyser ... -
Virkningsgradsmåling av en høyttrykks Francis turbin
(Master thesis, 2011)19. mai ble det utført virkningsgradsm°alinger av Norconsult AS ved Nore I Kraftverk i Buskerud. På denne målingen var Stud. Techn. Arild Høydal medvirkende, og utførte samtidig egne målinger av energifordelingen i avløpet ... -
Virtual Impedance Design for Power Quality and Harmonic Sharing Improvement in Microgrids
(Chapter; Peer reviewed, 2019)One of the main challenges of decentrally operated islanded microgrids has been proper harmonic sharing for parallel connected inverters. This is largely affected by differences in the feeder impedances of the inverters. ... -
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, ... -
Virtual synchronous machine-based control of a single-phase bi-directional battery charger for providing vehicle-to-grid services
(Journal article; Peer reviewed, 2016)This paper presents a single-phase Virtual Synchronous Machine (VSM) and its possible application for providing Vehicle-to-Grid (V2G) services from domestic battery chargers of Electric Vehicles (EVs). In a VSM, the power ... -
Virtual Synchronous Machine-based Power Control in Active Rectifiers for Micro Grids
(Master thesis, 2012)This dissertation presents an analytical study on virtual synchronous machine-based power control in active rectifiers for micro grids supported by prototype modelling, simulation results and discussions.Popularity and ... -
Visualizing Electromechanical Oscillations for Control Room Purposes
(Master thesis, 2022)Økt satsing på fornybare konverter-baserte energikilder og utfasing av eldre synkron- generatorer basert på fossile energikilder fører til økt tilstedeværelse av elektromekaniske pendlinger i kraftsystemet. Elektromekaniske ... -
Voltage Control and Provision of Reactive Power Reserves - for Hove and Refsdal Power Stations
(Master thesis, 2016)In this thesis voltage control and provision of reactive power reserves were studied, for multiple generators connected to a common main transformer. The system that was considered consists of two power stations in Vik in ... -
Voltage control for optimization of power transmission for a long subsea HVAC cable
(Master thesis, 2017)The objective of this thesis is to make a dynamic system representation of a long HVAC subsea cable, to investigate the use of controlling the operation voltage to optimize the active power transmission of the cable. The ... -
Voltage Control in Distribution Network with Local Generation
(Master thesis, 2014)A growing trend is connection of new renewable energy resources to the power system. Small and medium-scale hydroelectric and wind power plants are examples of such new production with economic incentives being connected ... -
Voltage distribution in medium voltage machines for aerospace applications fed by power converters
(Master thesis, 2022)Oppgaven beskriver en detaljert MATLAB & Simulink basert modell for prediksjoner av spenningsfordelingen i viklinger utsatt for gjentatte bratte spenningsflanker dannet av en PWM-omformer. Den foreslåtte modellen er en ... -
Voltage Regulation in Low Voltage Distribution Grids - A Study of Different Technologies and Implementation of a VSC Based Series Regulator
(Master thesis, 2020)Lading av elbiler, induksjonskokeplater og laster med kraftelektronikk blir mer og mer vanlig i det norske lavspentnettet og trekker høy effekt over kortere tid. Dette introduserer nye utfordringer knyttet til spenningsproblemer ... -
Voltage Source Converter Technology for Offshore Grids: Interconnection of Offshore Installations in a Multiterminal HVDC Grid using VSC
(Master thesis, 2010)This master thesis has investigated the possible application of voltage source converters (VSC) for the interconnection of offshore installations, i.e. wind farms and petroleum platforms, in a multiterminal DC (MTDC) grid. ... -
Voltage Stability Monitoring using a Modified Thevenin Impedance
(Chapter, 2017)This paper presents a method for voltage stability monitoring based on the maximum power transfer to the load. The only required information is the system topology, the data from PMUs and the operational status of synchronous ... -
Voltage Stresses in Converter-Fed Electric Aviation Motors
(Master thesis, 2020)Vekselretterforsyning er essensiell for utviklingen mot mer kompakt og lettere komponenter for helelektrisk fly. Vekselrettere er imidlertid kjent for å forårsake skadelige effekter i lederisolasjonen på grunn av kort ... -
Voltage Support in Distributed Generation by Power Electronics
(Master thesis, 2008)There is an increasing amount of power processed through power electronics in the areas of generation interface, energy storage and loads. This increment enables possibilities for improved solutions for efficient generation ... -
Voltage support strategies for Overvoltage Prevention of Distributed Solar Inverters in Low-Voltage Networks
(Master thesis, 2016)The increasing penetration of distributed photovoltaic generation in low voltage distribution networks has led to higher risk of overvoltage. This has made it necessary to utilize the capability of the inverter in the ... -
Voltage Support with Reactive Power from Fast Charging Stations with Local Energy Storage and Production
(Master thesis, 2021)Norge er ledende innen elektrisk mobilitet, og norske myndigheter har et mål om at alle passasjerbiler, lette varebiler og bybusser skal være nullutslippskjøretøy innen 2025. Med økt elbilandel vil også behovet for ... -
Voltage Upgrading of Overhead Lines
(Master thesis, 2010)Statnett wants to increase the transmission capacity in their 300 kV overhead lines by upgrading the operating voltage to 420 kV. To make this possible some modifications must be done. Insulator strings have to be elongated ... -
Voltage-dependency of loads and its role in voltage control strategies
(Master thesis, 2019)En spenningsreguleringsstrategi kan sees på som et bevisst valg tatt av nettselskapet om å holde spenningene i nettet i den nedre eller øvre delen av det tillatte spenningsbåndet gitt i Forskrift om leveringskvalitet (FoL). ...