Institutt for elkraftteknikk: Recent submissions
Now showing items 21-40 of 1641
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Compensation of oscillating instantaneous power in modern microgrids based on the conservative power theory
(Journal article, 2020)Considering the application of multi-functional grid-tied inverters in modern microgrids, this paper proposes a novel control strategy derived from the Conservative Power Theory (CPT), which makes possible the compensation ... -
Energi og industri - Mulighetsrom verdikjeder - NHO Veikart for fremtidens næringsliv
(SINTEF Rapport;, Research report, 2019)Kan fremtidig verdiskaping innen energi og industri opprettholde Norge som bærekraftig velferdsnasjon, samtidig som vi oppfyller våre forpliktelser i internasjonale klimaavtaler og løser egne utfordringer i tråd med FNs ... -
Stability Analysis of a Virtual Synchronous Machine-based HVDC Link by Gear's Method
(Chapter, 2020)Declining equivalent inertia caused by the massive integration of converter-based technologies can increase the risk of stability problems in the future power system. Control of HVDC systems as Virtual Synchronous Machines ... -
Small‐signal modeling and tuning of Synchronverter‐based wind energy conversion systems
(Peer reviewed; Journal article, 2021)The Synchronverter technique is an example of a virtual synchronous machine‐based control method for PWM controlled power electronic converters that enable converters to mimic the behavior of a synchronous generator (SG). ... -
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 ... -
Investigation of the Effect of Operating Conditions on Reliability of DC-link Capacitors in Microgrids
(Chapter, 2020)This paper considers a microgrid system where the impact of different non-ideal operating conditions on the reliability of the DC-link capacitor in three phase inverter systems is investigated. Rather than focusing on the ... -
Power- and Current-Based Control of Distributed Inverters in Low-Voltage Microgrids: Considerations in Relation to Classic Droop Control
(Chapter, 2020)This paper addresses the matter of active and reactive power sharing among distributed inverters in low-voltage microgrids, particularly highlighting the peculiarities of two strategies of coordinated control based on a ... -
Active NPC Converter for Variable Speed Operation of Pumped Storage Hydropower Plant
(Chapter, 2020)This paper discusses the full size Active Neutral Point Clamped (ANPC) Converter for large scale (100 MW, 13-15 kV) synchronous machine in a pumped storage hydropower application to enable the variable speed operation. ... -
Analytical Loss Equations for Three Level Active Neutral Point Clamped Converters
(Chapter, 2020)This paper presents the analytical expressions that can be used to calculate conduction and switching losses in each devices of an Active Neutral Point Clamped Converter. These expressions can be used to determine the ... -
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 ... -
Metal vapor content of an electric arc initiated by exploding wire in a model N2 circuit breaker: simulation and experiment
(Peer reviewed; Journal article, 2020)A conductive wire can explode by rapidly heating it to vaporization temperature by flowing a current through it. This process is utilized to generate high-temperature high-density plasmas. The temperature and pressure ... -
Stagnant peaked free surface released at a sloping beach
(Peer reviewed; Journal article, 2021)A stagnant free-surface flow is an instantaneous flow field of pure acceleration with zero velocity and a deformed surface. There exists a potential-flow acceleration field. With zero velocity and the acceleration field ... -
Decentralised hybrid robust/stochastic expansion planning in coordinated transmission and active distribution networks for hosting large-scale wind energy
(Peer reviewed; Journal article, 2020)Today, coordinated expansion planning is one of the key challenges for electricity systems including active distribution networks (ADNs) and transmission networks (TNs) hosting distributed renewable generation as well as ... -
Potential impacts of blockchain based equity crowdfunding on the economic feasibility of offshore wind energy investment
(Peer reviewed; Journal article, 2020)This paper explores the potential to reduce the levelized cost of electricity (LCOE) of offshore wind technology through the use of digitalized financial innovations made possible by Distributed Ledger Technology (DLT). ... -
Interval type-2 fuzzy sets based multi-criteria decision-making model for offshore wind farm development in Ireland
(Peer reviewed; Journal article, 2020)Offshore wind energy takes up an important place in Ireland’s renewable generation portfolio thanks to its abundant offshore wind resource. Optimal offshore site selection and developing site-specific energy policy instruments ... -
High voltage insulation design of coreless, planar PCB transformers for multi-MHz power supplies
(Peer reviewed; Journal article, 2021)This paper investigates the insulation design for printed, planar, coreless, and high-frequency transformers with high isolation-voltage. By using finite element analysis on 2D axial-symmetry, the transformer circuit ... -
A two-level over-voltage control strategy in distribution networks with high PV penetration
(Peer reviewed; Journal article, 2021)Over-voltage in low voltage feeders due to the increasing penetration level of photovoltaic (PV) is a crucial issue to be addressed. There is a need to use more advanced voltage control methods to satisfy the response time ... -
PD-Activity in Generator Stator Bar insulation versus Voltage Frequency and Temperature
(Chapter, 2020)Condition assessment of generators is today performed at various voltage frequencies and test temperatures. The main purpose of this paper is to compare measured PD results from sections of generator bars with that of ... -
Hydrogen Electric Airplanes: A Disruptive Technological Path to Clean Up the Aviation Sector
(Peer reviewed; Journal article, 2021)Recently, the COVID-19 pandemic has been a painful reminder of the vulnerability of the aerospace industry. It is currently facing challenges with costs, expensive fuels, and carbon emissions. In recovering the industry, ... -
Variable Speed Hydropower Conversion and Control
(Peer reviewed; Journal article, 2020)The objective of this paper is to develop and analyse a variable speed hydropower (VSHP) model that can aid the design of controllers that maximize the utilization of power plant for the provision of ancillary services, ...