Institutt for elkraftteknikk
Nye registreringer
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Offshore wind farm site selection in Norway: Using a fuzzy trigonometric weighted assessment model
(Peer reviewed; Journal article, 2024)Maximising the energy potential of offshore wind farms requires an in-depth assessment of technological, economic, sociopolitical, and environmental aspects. Given the large economic impact of large-scale projects, a robust ... -
Impact of energy pricing regimes on production schedules under solar-hydro hybridization
(Chapter, 2023)Hybridization of complementary energy production increases system flexibility and allows optimization of energy and resource availability. Hydropower and floating solar photovoltaics (FPV) have a high potential for ... -
Segmentation Effects in the Modular HVDC Offshore Wind Generator and its Impact on Losses
(Chapter, 2023)Worldwide wind power capacity jumped from 7.5 GW in 1997 to 564GW by 2018, according to IRENA. Many regions of the world have strong wind speeds, but the best locations for generating wind power are often remote, where ... -
Eddy Current Loss in Grain-Oriented Steel Laminations due to Normal Leakage Flux
(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 ... -
Optimal price-based scheduling of a pumped-storage hydropower plant considering environmental constraints
(Journal article; Peer reviewed, 2023)The paper proposes a novel medium-term scheduling model for a hydropower system composed by a pumped storage hydropower plant connected to a traditional hydropower plant subject to three types of environmental constraints; ... -
Long-term operational planning for flexible residential buildings with seasonal storage and capacity-based grid tariffs
(Peer reviewed; Journal article, 2024)When performing operation of the energy system in a building, it is difficult to accurately represent the uncertain long-term objectives in the short-term window, and the correlation between long-term objectives. This work ... -
Dynamic multi-agent dc-bus reconfiguration in modular motor drives with a stacked polyphase bridge converter
(Journal article; Peer reviewed, 2023)A stacked polyphase bridge converter consists of multiple standard, three-phase two-level voltage source inverters connected in series to the same dc voltage source. The authors present a decentralised and dynamic dc-bus ... -
Interactive protocols for distributed energy resource management systems (DERMS)
(Journal article; Peer reviewed, 2020)This paper proposes a novel approach to designing technical and financial protocols needed to support the penetration of distributed energy resources (DERs). It first formulates a complex, hard-to-implement, centralized ... -
Characterization of a novel counter-rotating twin harmonic PM machine
(Chapter, 2023)Most machine topologies have two-ports, with one set of electrical connections and one mechanical shaft. Three-port machines having two rotors and mechanical shafts are able to drive two mechanical loads using one stator ... -
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 ... -
Accuracy Analysis of a Dynamic State Estimator with a Hardware in the Loop Approach
(IEEE Belgrade PowerTech;2023, Chapter, 2023)State estimation is critical for the monitoring and control of power systems. The conventional approach for state estimation is based on quasi static models for the power systems and as such neglects relevant dynamic ... -
Considerations on Combining Unfolding Inverters with Partial Power Regulators in Battery–Grid Interface Converters
(Peer reviewed; Journal article, 2024)The application of electrochemical cells as a source unit of electrical energy is rapidly growing—used in electric vehicles and other electric mobility devices, as well as in energy supply systems—as energy storage, often ... -
The influence of multidirectional leakage flux on transformer core losses
(Peer reviewed; Journal article, 2021)In a power transformer, the leakage flux enters the laminations of the iron core in different directions. Depending on the orientation of the leakage flux, it can add eddy current and hysteresis losses to the well-documented ... -
Influence of fast rise voltage and pressure on partial discharges in liquid embedded power electronics
(Peer reviewed; Journal article, 2015)Initiation of partial discharges at the highly stressed regions of an Insulated Gate Bipolar Transistor (IGBT) can lead to degradation of the insulation and eventual total breakdown of the system. In this work, an experimental ... -
Coordinated Decentralized Control of Dynamic Volt-Var Function in Oil and Gas Platform With Wind Power Generation
(Peer reviewed; Journal article, 2023)The integration of offshore wind energy power system is a solution to reduce carbon emissions in the oil and gas sector. However, the intermittent profile of wind power generation can bring challenges of voltage/frequency ... -
A Hybrid Reinforcement Learning and Tree Search Approach for Network Topology Control
(Master thesis, 2023)The growing demand for electricity, driven by widespread adoption of heat pumps, electric vehicles, and industrial electrification, strains power grids and introduces challenges for a reliable and secure supply amidst ... -
Partial Discharges in Narrow Gaps on Power Electronic Converter
(Chapter, 2014)The quest for power electronic converters to operate in a subsea pressurized environment that is completely filled with appropriate dielectric liquid brings about the need to study the insulation performance of liquid in ... -
Decarbonizing integrated chlor-alkali and vinyl chloride monomer production: Reducing the cost with industrial flexibility
(Peer reviewed; Journal article, 2023)Industrial demand response will become increasingly important in power grids with high shares of variable renewables, yet the existing knowledge on how the industrial electricity demand and flexibility will change with the ... -
Representation of uncertainty in market models for operational planning and forecasting in renewable power systems: a review
(Peer reviewed; Journal article, 2023)As the power system is becoming more weather-dependent and integrated to meet decarbonization targets, the level and severity of uncertainty increase and inevitably introduce higher risk of demand rationing or economic ... -
Earth Fault Location in Non-Radial Resonant Grounded Networks – Theory, analysis and methods
(Doctoral theses at NTNU;2024:59, Doctoral thesis, 2024)A common grounding scheme for medium voltage distribution networks and high voltage sub-transmission networks is the resonance grounding scheme. Resonant grounded networks have few interruptions and a high quality of supply, ...