Browsing Institutt for elkraftteknikk by Title
Now showing items 1549-1568 of 2419
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Offshore Wind Farms and Isolated Oil and Gas Platforms: Perspectives and Possibilities
(Chapter, 2022)Single-cycle gas turbines operating at low-efficiency ranges due to redundancy concerns in offshore oil and gas platforms are responsible for considerable amounts of nitrogen oxides and greenhouse gas emissions in some ... -
Offshore Wind in Conjunction with an Offshore Oil and Gas Platform - Wind Power with Energy Storage in Synergy with Traditional Gas Turbine Generation.
(Master thesis, 2017)This thesis is part of the topic of wind power in combination with an oil and gas platform, and focuses on the interaction of an offshore wind farm, an energy storage system, and traditional offshore platform power generation ... -
Offshore Wind Power in the North Sea: Grid Integration of 1000 MW Offshore Wind Power into the Norwegian Power System
(Master thesis, 2008)Norway has great potential for offshore wind power, but the depths just outside the coast probably make floating wind turbines necessary. In order to use today s technology for offshore wind turbines with foundations on ... -
Offshore-Grid
(Master thesis, 2011)This thesis has been conducted in cooperation with the Norwegian transmission system operator, Statnett, and their research on two new interconnectors linking Norway to England and Germany. The work presented in this thesis ... -
Oil/ Paper Insulation for HVDC: Conductivity of Oil
(Master thesis, 2011)The work begins with a theoretical description of conductivity and the importance of this material property in the electrical power industry. The various theories describing high voltage conduction in highly insulating ... -
Ombygging av 230 V IT-installasjoner til 230/400 V TN-installasjoner
(Master thesis, 2017)På grunn av forventede endringer i bruksmønster og behov er det fra norske myndigheters side et ønske om å tilpasse seg den europeiske modellen for utforming av lavspenningsnett. I Norge i dag er størstedelen av ... -
Områdeanalyse av 22kV distribusjonsnett fra Rybakken transformatorstasjon med et 20 års perspektiv
(Bachelor thesis, 2021)Denne oppgaven ser på fremtidig utvikling i distribusjonsnettet som i dag er forsynt av Rybakken transformatorstasjon. Den introduserer det norske kraftnettet, med spesielt fokus på 22kV distribusjonsnettet i interesseområdet. ... -
On Adaptive Moving Average Algorithms for the Application of the Conservative Power Theory in Systems with Variable Frequency
(Journal article; Peer reviewed, 2021)The Conservative Power Theory (CPT) emerged in recent decades as a theoretical framework for coping with harmonically distorted and unbalanced electric networks of ac power systems with a high participation of converter ... -
On Dynamic Characterization Evaluation and Control of Active Gate Drivers for SiC power MOSFETs
(Doctoral theses at NTNU;2023:388, Doctoral thesis, 2023)Silicon Carbide (SiC) powerMetal-Oxide-Semiconductor Field-Effect Transistors (MOSFETs) bear the potential of revolutionizing power electronic converters in regard to high efficiency, but also high power density converters ... -
On estimation and identifiability issues of sex-linked inheritance with a case study of pigmentation in Swiss barn owl (Tyto alba)
(Journal article; Peer reviewed, 2014)Genetic evaluation using animal models or pedigree-based models generally assume only autosomal inheritance. Bayesian animal models provide a flexible framework for genetic evaluation, and we show how the model readily can ... -
On Modern IGBT Modules: Characterization, Reliability and Failure Mechanisms
(Master thesis, 2010)The increased demand of offshore power conversion systems is driven by newly initiated offshore projects for wind farms and oil production. Because of long distances to shore and inaccessibility of the equipment long repair ... -
On the Scalability of Blockchain-Supported Local Energy Markets
(Chapter, 2018)Local energy markets could play a very important role in future electric power systems, allowing small electricity producers/consumers to trade within a small geographical area. In this context, an important challenge to ... -
On the Tangential AC Breakdown Strength of Polymer Interfaces Considering Elastic Modulus
(Chapter, 2017)The interfacial breakdown between two dielectric surfaces was reported to represent one of the leading causes of failure for power cable joints and connectors, in which elastic modulus of the dielectric material plays a ... -
On the Tuning of Fractional Order Resonant Controllers for a Voltage Source Converter in a Weak AC Grid Context
(Peer reviewed; Journal article, 2021)This paper proposes a method for tuning the fractional exponent of different types of fractional order resonant controllers for a voltage source converter in a weak AC grid context. The main objective is to ensure the ... -
On-line Condition Assessment of 420 kV Terminations - design and development of partial discharge sensors
(Master thesis, 2023)En kabelterminering er en nødvendig komponent når man går fra en kabel til et annet apparat i kraftsystemet. Det har derimot vist seg at kabeltermineringer er mer utsatt for feil enn kabelen i seg selv, mest fordi den ... -
On-line Condition Assessment of 420 kV Terminations - design and development of PD sensors
(Master thesis, 2022)Termineringer er ansett som et svakt punkt i transmisjonsnettet, og industrien erfarer at dårlig terminering er en av hovedgrunnene til feil i kabelsystemer. Partielle utladninger som en konsekvens av hulromsdannelse i ... -
On-line Magnetic Flux Monitoring and Incipient Fault Detection in Hydropower Generators
(Master thesis, 2019)Denne rapporten undersøker om kontinuerlig overvåkning av magnetfeltet i luftgapet kan bidra til å avdekke begynnende elektromagnetiske og mekaniske feil i vannkraftgeneratorer. Feiltypene som undersøkes i denne rapporten ... -
On-line Voltage Estimation during Sensorless Control of an Induction Machine Drive
(Master thesis, 2019)Sensorløs kontroll av elektriske maskiner kan bidra til økt pålitelighet samt kostnadsreduksjon på motordrifter med krav til høy-presisjon. Kontrollstrategien feltorientert kontroll kan brukes for å oppnå sensorløs kontroll ... -
On-Line Voltage Stability Assessment - Combining Model Based and Measurement Based Indicators .
(Master thesis, 2017)This master thesis has examined the possibility of combining measurement and model based methods for on-line voltage stability assessment in the power system. Voltage instability may lead to voltage collapse and blackout ... -
Online Assessment of Contact Erosion in High Voltage Gas Circuit Breakers based on different Physical Quantities
(Journal article; Peer reviewed, 2018)In this paper, an effort has been made to evaluate the online condition of arc contacts as a vital component of interruption chamber in high voltage puffer type SF6 circuit breakers. The relationship between eroded mass ...