Institutt for elkraftteknikk: Nye registreringer
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Implementation and laboratory verification of method utilizing phase and neutral quantities for detection and location of low-current earth faults in resonant grounded networks
(Peer reviewed; Journal article, 2023)Earth faults is a challenging fault type to locate in resonant grounded networks due to their naturally low fault current, and the problem increases with an increased fault impedance. This paper describes the detailed ... -
Characterization of Ultrahigh Pressure Nitrogen Arc Using Black Box Arc Model
(Journal article; Peer reviewed, 2023)In this paper, the effect of filling pressure on the black box arc parameters of nitrogen arc is reported using Mayr arc model. The arc current is approximately 130 A at 190 Hz. The filling pressure is varied at absolute ... -
Limiting imbalance settlement costs from variable renewable energy sources in the Nordics: Internal balancing vs. balancing market participation
(Peer reviewed; Journal article, 2023)Due to the market gate closures in the Nordic energy markets, producers with variable renewable energy (VRE) assets, e.g., PV and wind power plants, must forecast their production prior to delivery, leaving room for ... -
A rich dataset of hourly residential electricity consumption data and survey answers from the iFlex dynamic pricing experiment
(Peer reviewed; Journal article, 2023)The iFlex field experiment was conducted to understand if and how households change their power consumption in response to variable hourly electricity prices. This experiment was conducted in several Norwegian regions, and ... -
Power market models for the clean energy transition: State of the art and future research needs
(Peer reviewed; Journal article, 2023)As power systems around the world are rapidly evolving to achieve decarbonization objectives, it is crucial that power system planners and operators use appropriate models and tools to analyze and address the associated ... -
Digital Energy Platforms Considering Digital Privacy and Security by Design Principles
(Chapter, 2023)The power system and markets have become increasingly complex, along with efforts to digitalize the energy sector. Accessing flexibility services, in particular, through digital energy platforms, has enabled communication ... -
Experimental evaluation of SiC-based medium voltage Series Resonant Dual-Active-Bridge three-level DC/DC converters for EV charging
(Chapter, 2023)This paper compares two topologies of SeriesResonant Dual-Active-Bridge (SRDAB) converters with threelevel input applied for EV charging from medium voltage (MV) bipolar DC-link. To convert such a voltage with the utilization ... -
Etablere en energidelingsmodell som simulerer lønnsomhet for energideling i et off-grid hyttefelt.
(Master thesis, 2023)På bakgrunn av at dagens hyttelandsbyer begynner å ligne mer på små tettsted, er det på tide å komme med nye bærekraftige løsninger gjeldende norske hytter. Denne masteroppgaven har som hensikt å undersøke forbedringspotensiale ... -
Control Methods for Operation of Pumped Storage Plants With Full-Size Back-to-Back Converter Fed Synchronous Machines
(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 ... -
Carbon abatement costs for renewable fuels in hard-to-abate transport sectors
(Peer reviewed; Journal article, 2023)Renewable fuels can help to reduce carbon emissions from transportation. To inform planning decisions, this paper estimates carbon abatement costs of replacing fossil fuels with renewable hydrogen, ammonia, or Fischer–Tropsch ... -
Swarm electrification: Harnessing surplus energy in off-grid solar home systems for universal electricity access
(Peer reviewed; Journal article, 2023)Achieving universal access to electricity by 2030, as set out by the Sustainable Development Goals, presents a significant challenge given the current rate of progress. A recent promising concept is swarm electrification. ... -
Accelerating electric vehicle charging investments: A real options approach to policy design
(Peer reviewed; Journal article, 2023)Replacing conventional cars and trucks with battery electric vehicles requires a rapid expansion of fast-charging infrastructure. However, private sector charging infrastructure investments are delayed by unfavorable project ... -
Advances in Machine-Learning Based Disaggregation of Building Heating Loads: A Review
(Peer reviewed; Journal article, 2023)This review article investigates the methods proposed for disaggregating the space heating units’ load from the aggregate electricity load of commercial and residential buildings. It explores conventional approaches together ... -
Analysis of gray Box Modelling of Transformers
(Journal article; Peer reviewed, 2021)Calculation of power system transients involving transformers require models that incorporate capacitive behavior. The paper outlines how classical low-frequency transformer models can be extended with capacitances and ... -
Pattern Recognition of Inter-Turn Short Circuit Fault in a Synchronous Generator using Magnetic Flux
(Journal article; Peer reviewed, 2021)This article provides a novel approach for discriminating the interturn short circuit (ITSC) fault in a salient pole synchronous generator (SPSG) based on the use of noninvasive sensors. A stray magnetic field is used as ... -
Stability and Power Quality Improvements to Facilitate Wide-Scale Deployment of Future Microgrids
(Doctoral theses at NTNU;2021:388, Doctoral thesis, 2023)The massive integration of distributed energy resources (DERs) represents a paradigm shift for the traditional power system, which until recently has been dominated by large, centralized power generation units. In addition ... -
Performance Evaluation of Signal Processing Tools Used for Fault Detection of Hydro-generators Operating in Noisy Environments
(Journal article; Peer reviewed, 2021)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, namely ... -
Integrated design and operational optimization of energy systems in dairies
(Journal article; Peer reviewed, 2023)Around 70% of worldwide industrial energy use is today based on fossil energy. Electrification of low temperature heat in this sector is pointed out as a key measure to reduce emissions. A large amount of the low temperature ... -
Investigation of the Application of Optimal Power Flow in the Assessment of Power System Reliability
(Master thesis, 2023)Med modernisering av kraftnettet er det avgjørende å ha smarte løsninger for effektiv og sikker systemplanlegging og drift. Tradisjonelle optimeringsmetoder av kraftsystemer blir reevaluert, siden de nå er relevante for ... -
Effektivitetsanalyse av AC- og AC/DC-hybridsystem i boliger
(Master thesis, 2023)I denne rapporten har en omfattende studie av AC- og AC/DC-hybridsystemer for effektstyring med ulike driftsmoduser og operasjonstilstander blitt gjennomført. Analysen har fokusert på systemenes ytelse og effektivitet ...