Blar i Institutt for elkraftteknikk på dokumenttype "Peer reviewed"
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Advanced Fault Detection of Synchronous Generators using Stray Magnetic Field
(Peer reviewed; Journal article, 2021)Many methods used for precise fault detection in salient pole synchronous generators (SPSGs) often require a priori knowledge of the healthy case, but this requirement impedes application of the methods since an accurate ... -
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 ... -
Adversarial security mitigations of mmWave beamforming prediction models using defensive distillation and adversarial retraining
(Journal article; Peer reviewed, 2022)The design of a security scheme for beamforming prediction is critical for next-generation wireless networks (5G, 6G, and beyond). However, there is no consensus about protecting beamforming prediction using deep learning ... -
Ageing of Technical Air and Technical Air with 7.5% C5-Fluoroketone by Free-Burning Arcs
(Journal article; Peer reviewed, 2023)This paper reports on the effect of ageing by free-burning arcs in 7.5% C5-fluoroketone (C5-FK) with 92.5% technical air in comparison to that in technical air (80% N2, 20% O2) at 1.3bar absolute pressure. The gases are ... -
Aggregation Methods for modelling hydropower and its implications for a highly decarbonised energy system in Europe
(Journal article; Peer reviewed, 2017)Given the pursuit of long-term decarbonisation targets, future power systems face the task of integrating the renewable power and providing flexible backup production capacity. Due to its general ability to be dispatched, ... -
Air Flow Measurements During Medium-Voltage Load Current Interruptions
(Journal article; Peer reviewed, 2015)Air has been considered a good alternative to SF6 as arc quenching medium for load break switchgear at medium voltage ratings. In this work, the air flow characteristics and influence from the electric arc have been studied ... -
An All-DC Offshore Wind Farm With Series-Connected Turbines: An Alternative to the Classical Parallel AC Model?
(Journal article; Peer reviewed, 2013)In this paper, the concept of an all-dc wind park with series-connected turbines is investigated as an alternative to the classical ac parallel or radial wind park. This paper presents a literature overview of all-dc wind ... -
Allocation of Spinning Reserves in Autonomous Grids Considering Frequency Stability Constraints and Short-Term Solar Power Variations
(Peer reviewed; Journal article, 2023)Low-inertia, isolated power systems face the problem of resiliency to active power variations. The integration of variable renewable energy sources, such as wind and solar photovoltaic, pushes the boundaries of this issue ... -
An Integrated Assessment of the Environmental and Economic Impact of Offshore Oil Platform Electrification
(Journal article; Peer reviewed, 2019)Electrification of offshore oil and gas installations on the Norwegian continental shelf is one of several options to decrease the CO2 emitted from these installations. However, there is an ongoing debate regarding how the ... -
An open data repository and a data processing software toolset of an equivalent Nordic grid model matched to historical electricity market data
(Journal article; Peer reviewed, 2017)This article presents an open data repository, the methodology to generate it and the associated data processing software developed to consolidate an hourly snapshot historical data set for the year 2015 to an equivalent ... -
An overview on formulations and optimization methods for the unit-based short-term hydro scheduling problem
(Journal article; Peer reviewed, 2019)The short-term hydro scheduling (STHS) problem aims at determining the optimal power generation schedules for either a single hydropower plant or an integrated system of cascaded watercourses during a time horizon from a ... -
Analysis of deceptive data attacks with adversarial machine learning for solar photovoltaic power generation forecasting
(Journal article; Peer reviewed, 2022)The solar photovoltaics (PV) energy resources have become more important with their significant contribution to the current power grid among renewable energy resources. However, the integration of the solar PV causes ... -
Analysis of electricity use and economic impacts for buildings with electric heating under lockdown conditions: examples for educational buildings and residential buildings in Norway
(Peer reviewed; Journal article, 2021)The COVID-19 pandemic has caused significant impacts on energy demand in Norway and many countries. It is important to improve the existing knowledge of building operation under unforeseeable disturbances. This study aimed ... -
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 ... -
Analysis of heat use profiles in Norwegian educational institutions in conditions of COVID-lockdown
(Peer reviewed; Journal article, 2021)The COVID-19 pandemic at the beginning of 2020 has significantly affected the energy demand in Norway. In order to avoid unnecessary energy use and ensure the proper functioning of buildings, it becomes essential to have ... -
Analytical approach for adequacy assessment of cyber–physical multi-microgrid distribution systems with distributed generation
(Peer reviewed; Journal article, 2022)In recent years, there has been a marked increase in the deployment of information and communication technologies (ICTs) in power systems. ICTs impart a cyber-physical nature to power systems, and though they improve the ... -
Analytical Calculation of Yoke Flux Patterns in Fractional-Slot Permanent Magnet Machines
(Journal article; Peer reviewed, 2017)Machine design problems are often solved under the assumption of no-load when calculating iron flux densities. However, it is particularly important to account for the fluxes from the stator currents, the armature reaction, ... -
Analytical Iron Loss Evaluation in the Stator Yoke of Slotless Surface-Mounted PM Machines
(Peer reviewed; Journal article, 2022)One of the attractive benefits of slotless machines is low losses at high speeds, which could be emphasized by a careful stator core loss assessment, potentially available already at the pre-design stage. Unfortunately, ... -
Analytical PM Eddy Currents Loss Evaluations in Inverter-Fed Slotless Machines Induced by SVM Control Using Polar Coordinates Formulations
(Peer reviewed; Journal article, 2023)Space vector modulation (SVM) is a widespread method for controlling PM machines. However, the switching harmonics contribute to eddy current losses in the magnet region. In the analytical modeling of slotless PM machines, ... -
An Analytical Prediction Model of Balanced and Unbalanced Faults in Doubly-Fed Induction Machines
(Peer reviewed; Journal article, 2022)This paper presents the exact transient solution to the unbalanced and balanced faults in the doubly-fed induction machine (DFIM). Stator currents, rotor currents, and stator fluxes have been validated using simulation and ...