Browsing Institutt for elkraftteknikk by Document Types "Peer reviewed"
Now showing items 41-60 of 527
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An Anti-Islanding Protection for VSM Inverters in Distributed Generation
(Peer reviewed; Journal article, 2020)Virtual synchronous machine (VSM) technology is an attractive control method for an inverter-based distributed generation (DG) due to having the voltage, and frequency support functionality. Embedding an anti-islanding ... -
Apparatus for calorimetric measurements of losses in MgB2 superconductors exposed to alternating currents and external magnetic fields
(Journal article; Peer reviewed, 2013)Inexpensive superconducting wires with low AC losses would open up for a large superconductor market in AC electrical power applications. One candidate for this market is the MgB2 conductor. In the development of an AC ... -
Apparatus for loss measurements under multidirectional and dc-bias flux in electrical steel laminations
(Peer reviewed; Journal article, 2020)Conventional standardized power loss measurements for electric steels are performed at flux densities with a single sinusoidal and unidirectional excitation. However, the flux inside electrical steel laminations can deviate ... -
An Approach for Optimal Pre-Conditioning of the Analytical Field Solution of Slotless PM Machines
(Peer reviewed; Journal article, 2021)Analytical modeling of electrical machines has the advantage of remarkable computational efficiency when compared with finite element analysis (FEA). This is especially important for slotless topologies, as they are well ... -
Arc Voltage Characteristics in Ultrahigh-Pressure Nitrogen Including Supercritical Region
(Journal article; Peer reviewed, 2017)A supercritical (SC) fluid is formed when both pressure and temperature of a fluid exceed the critical point, where distinct gas and liquid phases no longer exist. SC fluids demonstrate combined properties of gas and liquid, ... -
Arm Power Control of the Modular Multilevel Converter in Photovoltaic Applications
(Journal article; Peer reviewed, 2019)In this paper, a control method is proposed that allows the extraction of maximum power from each individual photovoltaic string connected to the Modular Multilevel Converter (MMC) and inject balanced power to the AC grid. ... -
Assessing incentives for multinational cooperation towards a North Sea Offshore Grid using allocation methods from coalitional game theory
(Journal article; Peer reviewed, 2018)The North Sea Offshore Grid (NSOG) has been recognized as a beneficial infrastructure project with respect to both economic and environmental concerns. Because of the absence of a supra-national planner, system optimal ... -
Assessing the benefits of exchanging spinning reserve capacity within the hydro-Dominated nordic market
(Peer reviewed; Journal article, 2021)This paper presents a hydrothermal scheduling toolchain suitable for detailed studies of procurement of spinning reserves in the hydro-dominated Nordic power system. The toolchain combines a long-term model to find the ... -
Assessing the impact of sampling and clustering techniques on offshore grid expansion planning
(Journal article; Peer reviewed, 2017)Due to the ongoing large-scale connection of non-dispatchable renewable energy sources to the power systems, short- to long-term planning models are challenged by an increasing level of variability and uncertainty. A key ... -
Assessment method of offshore wind resource based on a multi-dimensional indexes system
(Peer reviewed; Journal article, 2022)Traditional assessment indexes could not fully describe offshore wind resource for the meteorological properties of offshore are more complex than onshore. And as a result, the uncertainty of offshore wind power projects ... -
Assessment of flexibility in different ancillary services for the power system
(Chapter; Peer reviewed, 2020)To handle the changing power system and enable the energy transformation, several actions are needed, where the increase of digitalization, automation and more substantial production variability implies a need for flexibility. ... -
Assessment of the Distributed Ledger Technology for Energy Sector Industrial and Operational Applications Using the MITRE ATT&CK® ICS Matrix
(Peer reviewed; Journal article, 2023)In recent times, Distributed Ledger Technology (DLT) has gained significant attention for its potential application in the energy sector. Utilizing blockchain and DLT has demonstrated the ability to enhance the resilience ... -
Balancing future variable wind and solar power production in Central-West Europe with Norwegian hydropower
(Journal article; Peer reviewed, 2018)Norwegian hydropower has an excellent potential to balance power production in a future Central-West European power system with large shares of variable wind and solar resources. The assessment of the realistic potential ... -
Balancing needs and measures in the future West Central European power system with large shares of wind and solar resources
(Chapter; Peer reviewed, 2017)The future European power system will include large shares of variable wind and solar resources. This paper analyses the variability for the eHighway 2050 scenarios (from the EU 7th Framework project) by modelling wind and ... -
BATTPOWER Toolbox: Memory-Efficient and High-Performance Multi-Period AC Optimal Power Flow Solver
(Peer reviewed; Journal article, 2021)In this paper, we introduce an Interior Point-based (IP) Multi-Period AC Optimal Power Flow (MPOPF) solver for the integration of Stationary Energy Storage Systems (SESS) and Electric Vehicles (EV). The primary methodology ... -
Benchmarking time series based forecasting models for electricity balancing market prices
(Journal article; Peer reviewed, 2013)In the trade-off between bidding in the day-ahead electricity market and the real time balancing market, producers need good forecasts for balancing market prices to make informed decisions. A range of earlier published ... -
Bestemmelser om energi- og miljøkrav i reguleringsplaner – i lys av konseptet nullutslippsnabolag
(Journal article; Peer reviewed, 2022)Nullutslippsnabolag er områder med ambisjon om å redusere direkte og indirekte klimagassutslipp mot null. En av utfordringene kommuner og eiere/utbyggere møter når de vil bygge i tråd med normene for nullutslippsnabolag, ... -
Breakdown at Multiple Protrusions in SF6 and CO2
(Peer reviewed; Journal article, 2020)The electric breakdown at single and multiple protrusions in SF6 and CO2 is investigated at 0.4 and 0.6 MPa, respectively. Additionally, the breakdown fields at rough surfaces of two different areas were determined. From ... -
Breakdown in short rod-plane air gaps under positive lightning impulse stress
(Journal article; Peer reviewed, 2017)Prediction of withstand voltages in air-insulated systems are made on the basis of empirical models that are not sufficiently accurate for complex geometries. Bet-ter understanding of the spatio temporal ... -
Breakdown Mechanisms of Rod-Plane Air Gaps with a Dielectric Barrier Subject to Lightning Impulse Stress
(Journal article; Peer reviewed, 2018)The complexity of gas-insulated substations makes it difficult to predict withstand voltages. Modeling interaction between dielectric surfaces and electrical discharges is a key challenge. In this study, 60 mm rod-plane ...