Blar i Institutt for elkraftteknikk på tittel
Viser treff 1509-1528 av 2419
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New Environmentally-friendly Insulation Gases: Pre-breakdown and Breakdown Mechanisms near Insulating Surfaces under Fast Voltage Impulses
(Master thesis, 2022)Med det nåværende presset for å fase ut SF6, er det nødvendig med nye design av høyspentutstyr for å minimere konsekvensene av overgangen til mer miljøvennlige isolasjonsgasser. For å oppnå dette kreves en dypere forståelse ... -
New Environmentally-friendly Insulation Gases: Pre-breakdown Mechanisms under Impulse Voltage in Synthetic Air and AirPlus
(Master thesis, 2022)Med økende fokus på miljøvennlige løsninger i energi-industrien er det et ønske om å redusere den nåværende bruken av SF6 som isolasjonsgass. SF6 har utmerkede dielektriske egenskaper, noe som gjør det til en nær perfekt ... -
New switching pattern for AC/AC converters with RB-IGBTs for offshore wind parks
(Master thesis, 2008)Offshore wind power has an increasing interest in the research community and among the politicians. Therefore it is important to find the right solutions to meet the environmental and commercial requirements to give offshore ... -
Next Generation High Voltage Subsea Transmission Cables: Influence of electric field, NaCl impurities and thermal cycling rate on insulation lifetime.
(Master thesis, 2019)For å kunne utvikle dynamiske undervannskabler med en konkurransedyktig levetid, behøves det kunnskap om hvordan vanntrær forplanter seg i materialet. Det har blitt gjennomført en litterær vurdering av faktorene som påvirker ... -
Next-Generation Cryo-Electric Hydrogen-Powered Aviation: A Disruptive Superconducting Propulsion System Cooled by Onboard Cryogenic Fuels
(Journal article; Peer reviewed, 2022)The idea of hydrogen (H2)- powered airplanes has recently attracted a revitalized push in the aviation sector to combat carbon dioxide (CO2) emissions. However, to also reduce, or even eliminate, non-CO2 emissions and con- ... -
The Noise Effects on Signal Processors Used for Fault Detection Purpose
(Chapter, 2020)Signal Processing plays a crucial role in addressing failures in electrical machines. Experimental data are never perfect due to the intrusion of undesirable fluctuations unrelated to the investigated phenomenon, so-called ... -
Non-intrusive identification of hydro power plants' dynamics using control system measurements
(Peer reviewed; Journal article, 2020)In this paper we propose two non-intrusive methods for identifying hydro power plant dynamics using standard system identification techniques. The purpose of the tests is to obtain transfer functions relevant for the ... -
Non-linear charge-based battery storage optimization model with bi-variate cubic spline constraints
(Peer reviewed; Journal article, 2020)Variable renewable generation demands increasing amount of flexible resources to balance the electric power system, and batteries stand out as a promising alternative. Battery models for optimization typically represent ... -
Non-normal-Mode Onset of Convection in a Vertical Porous Cylinder
(Peer reviewed; Journal article, 2020)This is the first study reporting a full three-dimensional (3D) non-normal-mode onset of convection in a porous medium. In this paper, the onset of thermal convection in a vertical porous cylinder is investigated theoretically. ... -
Non-Synchronous Generation Impact on Frequency Response - A Case from Albania
(Chapter, 2020)Albanian electric power generation has been almost totally dependent on hydropower since its system inception. Within the past decade, although modest, there has been some share of power produced from Renewable Energy ... -
Nonconvex Medium-Term Hydropower Scheduling by Stochastic Dual Dynamic Integer Programming
(Journal article; Peer reviewed, 2018)Hydropower producers rely on stochastic optimization when scheduling their resources over long periods of time. Due to its computational complexity, the optimization problem is normally cast as a stochastic linear program. ... -
Nonlinear Control Structure of Grid Connected Modular Multilevel Converters
(Journal article; Peer reviewed, 2017)This paper implements nonlinear control structure based on Adaptive Fuzzy Sliding Mode (AFSM) Current Control and Unscented Kalman Filter (UKF) to estimate the capacitor voltages from the measurement of arm currents of ... -
Nordsjøen som plattform for grønn omstilling
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North Sea offshore network and energy storage for large scale integration of renewables
(Journal article; Peer reviewed, 2014)This review investigates different aspects of the realization of a North Sea offshore grid. The North Sea region has several characteristics that make large-scale integration of renewable energy sources attractive, such ... -
Norway as a Battery for the Future European Power System – Comparison of Two Different Methodological Approaches
(Chapter, 2019)This paper compares the simulation results for two stochastic optimization power market models. EMPS uses aggregation and heuristics to calculate the optimal dispatch. SOVN simulates the operation of the power system in ... -
Norway as a Battery for the Future European Power System—Impacts on the Hydropower System
(Journal article; Peer reviewed, 2017)Future power production in Europe is expected to include large shares of variable wind and solar power production. Norway, with approximately half of the hydropower reservoir capacity in Europe, can contribute to balance ... -
Norway as Swing Producer
(Master thesis, 2011)This paper looks closer at using Norwegian hydropower for swing production towards Continental Europe. On-going discussions suggest that Norwegian resources could be utilised to a larger extent, and thereby enable further ... -
Norwegian Day-ahead Electricity Price Forecasting using AI Models
(Master thesis, 2022)Omleggingen fra de regulerte, lokale monopolkraftmarkedene i Norge til liberaliseringen av krafthandelen som følge av energiloven i 1991, har skapt konkurransekraft blant markedsaktørene. I tillegg kommer den nylige ... -
Norwegian Energy Scenarios
(Master thesis, 2017)The penetration of renewable energy sources is increasing in the European power system. Their interaction with the power market is fundamentally different from that of traditional thermal power production. This thesis aims ... -
Norwegian hourly residential electricity demand data with consumer characteristics during the European energy crisis
(Peer reviewed; Journal article, 2023)This dataset was collected to understand how Norwegian households responded to the electricity price shock due to the European energy crisis. It consists of consumer characteristics and their self-reported responses to the ...