Blar i Institutt for elkraftteknikk på tittel
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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) ... -
Reducing Neighborhood Peak Loads with implicit Peer-to-Peer energy trading under Subscribed Capacity tariffs
(Chapter, 2019)Increased power demand is a growing problem for distribution system operators (DSO) capable of causing unwanted and expensive grid upgrades. Descending prices for flexible resources and power generation such as house ... -
Reducing sub-harmonic spatial fields in Concentrated winding machines using Genetic Algorithms
(Master thesis, 2013)Certain slot/pole combinations in fractional slot winding machines with concentrated coils exhibit high amount of sub-harmonic spatial fields. These harmonics may cause additional losses and ripple torque. Literature suggest ... -
Reduksjon av effekttopper i kontorbygg
(Master thesis, 2018)Den totale kraftetterspørselen i Norge er forventet å øke fra 133 TWh i 2016 til 146 TWh innen 2030. Lastene knyttet til nettet forventes også å bli mer effektkrevende. I tillegg forventes andelen enkelt regulerbar energi ... -
Reference data set for a Norwegian medium voltage power distribution system
(Peer reviewed; Journal article, 2023)This article describes a reference data set for a representative Norwegian radial, medium voltage (MV) electric power distribution system operated at 22 kV. The data set is developed in the Norwegian research centre CINELDI ... -
Regenerative Passive Snubber Circuit for High-Frequency Link Converters
(Peer reviewed; Journal article, 2021)This letter presents a passive snubber circuit for high-frequency link cycloconverters, which typically suffer from voltage oscillations across matrix-stage semiconductor devices. The proposed passive snubber allows for ... -
Regional Effects of Hydrogen Production in Congested Transmission Grids with Wind and Hydro Power
(Chapter, 2017)Some of the best wind and natural gas resources in Norway are located in rural areas. Hydrogen can be produced from natural gas in combination with carbon capture and storage to utilize the natural gas resources without ... -
Regional energi- og klimaanalyse av fem kommuner i Sør-Østerdal: Testing og bruk av modellverktøy
(Master thesis, 2007)Denne masteroppgaven tar utgangspunkt i en todelt problemstilling. For det første gjennomføres en regional energi- og klimaanalyse av og for de fem kommunene i Sør-Østerdal: Elverum, Trysil, Åmot, Stor-Elvdal og Engerdal. ... -
Regionalized climate footprints of battery electric vehicles in Europe
(Peer reviewed; Journal article, 2021)The climate mitigation benefits of battery electric vehicles (BEVs) relative to internal combustion engine vehicles (ICEVs) are highly dependent on the carbon intensity of the electricity consumed during their production ... -
Reinvesteringsbehov for stolper i høyspennings fordelingsnett
(Master thesis, 2014)Kraftsystemet er en aldrende infrastruktur og behovet for reinvestering øker raskt. I løpet av ganske få år forventes det en kommende reinvesteringsbølge. I løpet av de siste årene er det påvist betydelige besparelser ved ... -
Reinvestment strategy making for distribution networks
(Research report, 2008)The assets of electricity distribution are of critical importance for continuity of service, safety and economic performance. Stakeholders such as customers, regulators and shareholders are increasingly seeking assurance ... -
Relay Lab at NTNU
(Master thesis, 2014)This thesis presents background on power system protection, relay principles, modern relay technology and relay testing, to support the design, practical set up and proposals for use of a new relay lab at NTNU.The paper ... -
Relay Protection of DG-units in Norway
(Master thesis, 2017)The relay protection monitors the electrical power system for abnormal situations. Its protection settings define whether a production unit should stay online or decouple during abnormal situations. Reviewing the current ... -
Releplanlegging på lange distribusjonsavganger
(Master thesis, 2015)Det er blitt utført reléplanlegging på to distribusjonsradialer i Eidsiva nett sitt konsesjonsområde. Radial 1 har hatt betydelige problemer med selektiviteten. Nye reléinnstillinger for reléene på radial 1 er blitt ...