Blar i Institutt for elkraftteknikk på tidsskrift "Energies"
Viser treff 1-20 av 36
-
Active Power Filter Pre-Selection Tool to Enhance the Power Quality in Oil and Gas Platforms
(Peer reviewed; Journal article, 2021)This paper proposes a preliminary design tool for active power filters’ (APFs) solutions to be applied in offshore oil and gas platforms, where power quality indices are typically low, and reactive power compensation and ... -
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, ... -
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 ... -
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. ... -
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 ... -
Challenges in all-dc offshore wind power plants
(Peer reviewed; Journal article, 2021)As the size and distance from shore of new offshore wind power plants (OWPPs) increase, connection to shore using high-voltage (HV) direct-current (DC) technology becomes more cost-effective. Currently, every offshore wind ... -
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 ... -
Current-Based Coordination of Distributed Energy Resources in a Grid-Connected Low-Voltage Microgrid: An Experimental Validation of Adverse Operational Scenarios
(Peer reviewed; Journal article, 2022)Low-voltage grid-connected microgrids rely on the exploitation of inverter-interfaced distributed energy resources (DERs) in order to feed loads and to achieve bidirectional power flow controllability at their point of ... -
DC Current Interruption Based on Vacuum Arc Impacted by Ultra-Fast Transverse Magnetic Field
(Peer reviewed; Journal article, 2020)In this paper, the effect of an external ultrafast transverse magnetic field (UFTMF) on a vacuum arc in the diffused mode has been studied. According to the results of studies, a novel approach for making a zero-crossing ... -
Dielectric Strength of Polymeric Solid–Solid Interfaces under Dry-Mate and Wet-Mate Conditions
(Peer reviewed; Journal article, 2021)One of the most important causes of insulation system failure is the breakdown of the interface between two solid dielectrics; understanding the mechanisms governing this breakdown phenomenon is therefore critical. To that ... -
Dynamic Capabilities in Electrical Energy Digitalization: A Case from the Norwegian Ecosystem
(Peer reviewed; Journal article, 2022)This paper aims to identify the dynamic capabilities required for electrical energy service providers to transform toward a digital and platform-based business models in the context of the current energy transition. The ... -
Effects of Fast Elongation on Switching Arcs Characteristics in Fast Air Switches
(Journal article; Peer reviewed, 2020)This paper is devoted to investigating the effects of high-speed elongation of arcs inside ultra-fast switches (ucontact≈ 5–80 m/s), through a 2-D time-dependent model, in Cartesian coordinates. Two air arcs in series, one ... -
Efficiency Evaluation of the Dual System Power Inverter for On-Grid Photovoltaic System
(Peer reviewed; Journal article, 2022)The implementation of a dual electric system that is capable of operating with either constant current and variable voltage, or constant voltage and variable current appliances, is one of the possible options to solve ... -
An Efficient Non-Inverting Buck-Boost Converter with Improved Step Up/Down Ability
(Peer reviewed; Journal article, 2022)In this article, a new non-inverting buck-boost converter with superior characteristics in both bucking and boosting is presented. The proposed converter has some distinct features, such as high step-up/-down ability and ... -
Energy Storage Scheduling in Distribution Systems Considering Wind and Photovoltaic Generation Uncertainties
(Journal article; Peer reviewed, 2019)Flexible distributed energy resources, such as energy storage systems (ESSs), are increasingly considered as means for mitigating challenges introduced by the integration of stochastic, variable distributed generation (DG). ... -
Evaluation Method for the Hourly Average CO2eq. Intensity of the Electricity Mix and Its Application to the Demand Response of Residential Heating
(Journal article; Peer reviewed, 2019)This work introduces a generic methodology to determine the hourly average CO2eq. intensity of the electricity mix of a bidding zone. The proposed method is based on the logic of input–output models and avails the balance ... -
Evaluation of the Fluid Model Approach for the Sizing of Energy Storage in Wave-Wind Energy Systems
(Journal article; Peer reviewed, 2016)The application of energy storage in offshore renewable generation systems allows managing the intrinsic uncertainty of the resources and improving the utilization factor of the electrical network. Optimal storage design ... -
Exploring the Potential for Increased Production from the Wave Energy Converter Lifesaver by Reactive Control
(Journal article; Peer reviewed, 2013)Fred Olsen is currently testing their latest wave energy converter (WEC), Lifesaver, outside of Falmouth Bay in England, preparing it for commercial operation at the Wavehub test site. Previous studies, mostly focusing on ... -
Hydro Power Reservoir Aggregation via Genetic Algorithms
(Journal article; Peer reviewed, 2017)Electrical power systems with a high share of hydro power in their generation portfolio tend to display distinct behavior. Low generation cost and the possibility of peak shaving create a high amount of flexibility. However, ... -
Interface Converters for Residential Battery Energy Storage Systems: Practices, Difficulties and Prospects
(Peer reviewed; Journal article, 2021)Recent trends in building energy systems such as local renewable energy generation have created a distinct demand for energy storage systems to reduce the influence and dependency on the electric power grid. Under the ...