Institutt for elkraftteknikk: Nye registreringer
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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, ... -
NTNU-SINTEF SolarNet: A solar irradiation monitoring network at high latitudes
(Peer reviewed; Journal article, 2023)This study presents a monitoring network for solar irradiation at high latitudes, called NTNU-SINTEF SolarNet. The network collects, with a time resolution ranging from seconds to hours, solar irradiance data, e.g. global ... -
Power Flow Control in a Modular Converter With Energy Storage
(Peer reviewed; Journal article, 2023)Using modularized power converters with scalable energy storage in particle accelerators can be further enhanced with controls that can be adapted to optimise different design targets, such as to minimise the front-end ... -
Stability Improvement of MMC-Based Multiterminal HVDC Grids
(Doctoral theses at NTNU;2024:7, Doctoral thesis, 2024)The 100% renewable European smart grid cannot be implemented without reliance on wind energy from the offshore wind farms in the North Sea. High-voltage direct current (HVDC) cables are generally used to transfer power ... -
Energy profiles and electricity flexibility potential in apartment buildings with electric vehicles – A Norwegian case study
(Journal article; Peer reviewed, 2024)Energy flexibility in buildings has the potential to reduce the grid burden of neighbourhoods, yet its practical implementation remains limited. This paper presents a data-based case study from Norway, examining the ... -
A Hybrid Current- and Voltage-Source Driver for Active Driving of Series-Connected SiC MOSFETs
(Peer reviewed; Journal article, 2024)The series-connection of silicon carbide (SiC) metal-oxide-semiconductor field-effect transistors ( mosfet s) is an attractive way of increasing the blocking voltage capability of a switch. However, due to inherent transient ... -
A Scalable DC/DC Converter Topology with Modularized Energy Storage for High Energy Physics Applications
(Journal article; Peer reviewed, 2023)This article presents the design and control of a high-power modular dc–dc converter for electromagnets used in high energy physics applications. The fundamental building modules, herein called bricks, can either be connected ... -
Scalable Regenerative Power Converters for Accelerator Magnets
(Doctoral theses at NTNU;2023:413, Doctoral thesis, 2023)Electromagnets are used at The European Centre for Nuclear Research (CERN) in high-energy physics experiments to direct the charged particle beams. They store significant amounts of energy in the magnetic fields and are ... -
Technology Suitability Assessment of Battery Energy Storage System for High-Energy Applications on Offshore Oil and Gas Platforms
(Peer reviewed; Journal article, 2023)Selecting a battery energy storage technology for application on offshore platforms or marine vessels can be a challenging task. Offshore oil and gas platforms (OOGPs) require battery energy storage systems (BESSs) with ... -
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 ... -
Evaluating the Precision of the DC Decay Test Method for Characterizing Wound-Field Synchronous Machines in Power Plants
(Peer reviewed; Journal article, 2023)The sudden short-circuit test is the gold standard for determining the equivalent diagram of wound-field synchronous machines (WFSMs). Only a single measurement is needed while the machine is in saturated mode. However, ... -
Uncertainty Aware Deep Learning Model for Secure and Trustworthy Channel Estimation in 5G Networks
(Peer reviewed; Journal article, 2023)With the rise of intelligent applications, such as self-driving cars and augmented reality, the security and reliability of wireless communication systems have become increasingly crucial. One of the most critical components ... -
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 ...