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Rapid 3-D Magnetic Integral Field Computation of Current-Carrying Finite Arc Segments with Rectangular Cross-Section
(Journal article; Peer reviewed, 2020)The computation of three-dimensional (3-D) magnetic fields is a demanding task in the analysis of electrical machines and other electromagnetic devices. In this context, integral field calculation provides a smooth solution, ... -
Re-synchronization of Universal Droop Control Distributed Generation Inverter to the Grid
(Chapter, 2019)The distributed generation (DG) inverters can operate in an islanded mode and a grid-connected mode. Under grid fault conditions, the inverter is disconnected from the main grid and operates in the islanded mode. When DG ... -
Reactive Power and Voltage Control of Offshore Wind Farms
(Master thesis, 2014)There are several challenges related to reactive power and voltage control of HVAC transmission from offshore wind farms to the main grid, which need to be addressed when designing wind farms. One challenge is the variation ... -
Reactive Power Compensation and Active Filtering Capabilities of the Step-down AC Chopper
(Master thesis, 2013)The Step-down AC Chopper (hereby referenced as "AC Chopper") has been presented in recent academic papers as a possible solution for reactive compensation. The goal of this project was to investigate and evaluate the ... -
Reactive Power Compensation using a Matrix Converter
(Master thesis, 2010)This Master's thesis investigates a new application for the matrix converter: Shunt reactive power compensation. The suggested Matrix Converter-based Reactive power Compensation (MCRC) device is composed of a matrix ... -
Reactive Power Considerations in Reliability Assessment of Power Systems
(Master thesis, 2021)ormålet med denne avhandlingen er å implementere en ikke-sekvensiell Monte Carlo-simuleringsmetode med bruk av AC optimal lastflyt i Python. Videre implementeres en metode som tar hensyn til reaktiv effekt i pålitelighetsstudier ... -
Reactive Power Considerations in Reliability Assessment of Power Systems
(Master thesis, 2021)Formålet med denne avhandlingen er å implementere en ikke-sekvensiell Monte Carlo-simuleringsmetode med bruk av AC optimal lastflyt i Python. Videre implementeres en metode som tar hensyn til reaktiv effekt i pålitelighetsstudier ... -
Real time hardware-in-the-loop comparison of frequency estimation techniques in application to ROCOF based islanding detection
(Journal article; Peer reviewed, 2018)Rate of change of frequency (ROCOF) is one of the most common islanding detection techniques because of its simplicity and economical benefits. However, it does need thorough considerations to avoid mis-operations of ROCOF ... -
Real Time Phasor Estimation based on Recursive Prony with Several Channels of One PMU
(Chapter, 2018)Phasor estimation is crucial for monitoring and control of smart power systems. The classical signal processing method named Prony has been used for estimating the parameters of measured signals such as frequency, damping ... -
Real-Time implementation for gird-forming control of type-4 wind turbine to mitigate voltage and frequency instabilities in high renewable penetration.
(Master thesis, 2019)Den økende inntrengningen av PE-omformer-grensesnittgenerasjonsenheter i elektriske kraftsystemer har gitt mange utfordringer i kraftsystemdriften. To av de viktigste utfordringene er spenningskontroll og frekvensstyring ... -
Real-Time Parameter Identification for Reliable Operation of Synchronous Generators
(Master thesis, 2020)Denne masteroppgaven utforsker metoder for online identifiksajon av synkronmaskiner ved hjelp av online målinger. Det sentrale konseptet for online parameterestimeringsalgoritmen er å bruke de dynamiske målingene fra ... -
Real-time Volt-Var control of grid forming converters in DER-enriched distribution network
(Peer reviewed; Journal article, 2023)The growing installation of distributed energy resources (DERs) in a distribution network (DN) poses substantial issues related to voltage regulation. Due to constrained switching operation and slower response time, ... -
Recognizing snow on a solar module and melting it, prototyping and profitability
(Master thesis, 2021)I denne rapporten er målet å forstå hvordan man enklest kan fjerne snø ifra solcellepaneler. Solcellepaneler har en lei tendens til å bli dekket av snø, og ikke motta solstrålene som trengs for å produsere energi. ... -
A Rectangular End-Winding Model for Enhanced Circulating Current Prediction in AC Machines
(Peer reviewed; Journal article, 2020)The end-winding region is usually overlooked in the roebel design of large AC machines. However, saturated stator slots cause overhang parts to impact the circulating currents significantly. In fact, a precise knowledge ... -
Recursive Multi-Channel Prony for PMU
(Journal article; Peer reviewed, 2023)The phasor estimation process is important in monitoring, controlling and protecting power networks. Prony's method can be used as an estimator by which electrical power system parameters are approximated. The Prony algorithm ... -
Recursive Prediction Error Gradient-Based Algorithms and Framework to Identify PMSM Parameters Online
(Peer reviewed; Journal article, 2022)Real-time acquisition of accurate machine parameters is of significance to achieving high performance in electric drives, particularly targeted for mission-critical applications. Unlike the saturation effects, the temperature ... -
A Recursive Prediction Error Method with Effective Use of Gradient-Functions to Adapt PMSM-Parameters Online
(Chapter, 2020)This paper proposes a method for online estimation of electrical parameters of interior permanent magnet synchronous machines (IPMSM) based on the recursive prediction error method (RPEM). The parameter-sensitivity functions ... -
Recursive training based physics-inspired neural network for electric water heater modeling
(Peer reviewed; Journal article, 2022)Aggregating flexibility from residential electric water heaters (EWHs) is fast gaining commercial interest. Flexibility modeling of an EWH involves highly precise and quick simulation of EWH water temperature using the EWH ... -
Reducing HVDC Network Oscillations Considering Wind Intermittency Through Optimized Grid Expansion Decision
(Chapter, 2018)This paper considers the evolution of independent offshore HVDC links into a multi-terminal network. It proposes a control strategy to maximize the DC voltage stability under the worst-case perturbation scenario and considers ... -
Reducing Neighborhood Peak Load with a Peer-to-Peer Approach under Subscribed Capacity Tariffs
(Master thesis, 2019)På grunn av et økende effektforbruk står elektrisitetsnettet overfor et kapasitetsproblem og dyre oppgraderinger. En mulig løsning på dette problemet er å benytte effektbaserte nettariffer og peer-to-peer-teknologi (P2P) ...