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2D Finite Element (FE) modeling and simulation of the stator winding of synchronous machines in adjustable degree of detailing
(Master thesis, 2007)The General Purpose 2D Electromagnetic Tool, GP2DET, at Voith Siemens Hydro Power Generation GmbH is a tool developed for simulation and calculation of electrical parameters in large hydro power machines. In this tool, the ... -
3-Phase Multi-Functional Grid-Tied Inverter for Compensation of Oscillating Instantaneous Power
(Chapter, 2019)The primary objective of this paper is to present the basic terms of Conservative Power Theory (CPT) and its applications for compensating instantaneous power oscillations in three-phase three-wire systems. The reference ... -
30 kW Power Boost System for Drive Trains for Electric Vehicles Based on Supercapacitor Technologies
(Master thesis, 2007)The goal of the master thesis is to design, dimension and construct a power boost system for the drive trains in electric vehicles, utilizing supercapacitor technology. In order to build the system a supercapacitor bank ... -
A 1 kW PFC converter with GaN-transistors and planar magnetics
(Master thesis, 2019)Auka krafttettleik, kostnadsreduksjon, auka effektivitet og auka driftssikkerheit er fire av dei viktigaste målsetjingane i halvleiarindustrien i dag. Ved bruk av GaN-halvleiarar er fleire av desse målsetjingane innan ... -
A Case Study on Medium-Term Hydropower Scheduling with Sales of Capacity
(Peer reviewed; Journal article, 2016)This paper conducts a case study on hydropower scheduling considering sales of capacity reserves and impacts of detailed mod-elling. In latter years a growing demand for reserve capacity has been needed to ensure stable ... -
A control scheme for utilizing energy storage of the modular multilevel converter for power oscillation damping
(Chapter, 2017)This paper presents a control scheme that utilizes energy storage of the Modular Multilevel Converter (MMC) for Power Oscillation Damping (POD) service. Such a service is used to enhance grid stability by providing damping ... -
A Data-driven Approach to Grid Impedance : Identification for Impedance-based Stability Analysis under Different Frequency Ranges
(Chapter, 2019)The instability caused by inappropriate damping design of grid-connected converters under specific grid impedance makes the grid impedance estimation a crucial issue. To guide the system controller design toward a stable ... -
A DC-Grid Proposal for Deep Sea Mining Focusing on Power Quality Aspects
(Master thesis, 2019)Over the last years, DC grids have become a significant trend topic as a solution for better power distribution systems reducing losses and increasing the efficiency significantly. The technology of HVDC transmission is a ... -
A Feasibility Study of Blockchain Technology As Local Energy Market Infrastructure
(Master thesis, 2018)The recent surge in renewable energy in the distribution grid could transform the generation side to be more variable, which potentially reduces power quality. This technical local challenge could be compensated by introducing ... -
A generic framework for power system flexibility analysis using cooperative game theory
(Journal article; Peer reviewed, 2017)Electricity grid infrastructures provides valuable flexibility in power systems with high shares of variable supply due to its ability to distribute low-cost supply to load centers (spatial), in addition to interlinking a ... -
A Guideline for employing PSIM on power converter Applications: Prototyping and educational tool
(Chapter, 2017)Fast prototyping tools for power electronics and control systems are becoming handful players on effortlessly translating computer simulated results into real experimental validations, not abdicating reliability. Among ... -
A mechanism for allocating benefits and costs from transmission interconnections under cooperation: A case study of the North Sea offshore grid
(Journal article; Peer reviewed, 2018)We propose a generic mechanism for allocating the benefits and costs that result from the development of international transmission interconnections under a cooperative agreement. The mechanism is based on a planning model ... -
A Method for bidding in sequential Capacity Reserve Markets using mixed-integer programming
(Master thesis, 2012)System security and power quality is important in today's society and the ability to regulate and balance production and consumption is crucial for any power system. More and more penetration of intermittent production in ... -
A Method for Planning a Fast Charging Station
(Master thesis, 2019)Denne masteroppgaven foreslår en ny planleggingsmetodikk for hurtigladestasjoner. Ny tenking når man skal planlegge nye, store laster i nettet vil være nødvendig for at framtidens distribusjonsnett skal være samfunnsøkonmisk ... -
A Method to Estimate the Necessary Twist Pitch in Multi-filamentary Superconductors
(Journal article; Peer reviewed, 2014)Twisting of multi-filamentary superconductors is an important step in the development of wires with AC losses at an acceptable level for AC applications. The necessary twist pitch depends on wire architecture, critical ... -
A Model for Techno-Economic Optimization of Wind Power Combined with Hydrogen Production in Weak Grids
(Journal article; Peer reviewed, 2009)This paper presents a two-step method for dimensioning and time-sequential operation of Wind-hydrogen (H2) plants operating in power markets. Step 1 involves identification of grid constraints and marginal power losses ... -
A Modular Series Connected Converter for a 10 MW, 36 kV, Transformer-Less Offshore Wind Power Generator Drive
(Journal article; Peer reviewed, 2012)In the future, large offshore wind turbines are expected to reach a rating of 10 MW. To reduce the corresponding weight increase of the nacelle, research has started to focus on solutions to omit the step-up transformer ... -
A novel arrangement for improving three phase saturated-core fault current limiter (SCFCL)
(Chapter, 2018)Fault current limiter (FCL) is a device that has low impedance in normal state of the power network and has simultaneous large impedance in the time of fault, so that it would lead to limitation of the fault current. Among ... -
A Novel Methodology to Monitor Partial Discharges in Microvoids at Solid-Solid Interfaces
(Chapter; Peer reviewed, 2019)The combination of two solid dielectrics increases the risk of partial discharge (PD) activity in microscopic cavities at the solid-solid dielectric interfaces, facilitating interface tracking failures. The main purpose ... -
A Probabilistic Model-aided Failure Prediction Approach for Spring-Type Operating Mechanism of High Voltage Circuit Breakers
(Journal article; Peer reviewed, 2018)To avoid failures in circuit breakers (CBs) and to extend the lifetime of these critical components, condition-based-maintenance has been increasingly requested by utilities to enable them to efficiently manage their assets. ...