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Transformer-Less Series Compensation of Line-Commutated Converters for Integration of Offshore Wind Power
(Doctoral Theses at NTNU, 1503-8181; 2013:126, Doctoral thesis, 2013)Wind energy is gradually becoming a major contributor to the overall energy production, especially in the developed world. This is because of the ever- increasing concerns about long-term availability of conventional fuels, ... -
Transient Electric Field Distribution Estimates for Layered Paper-Oil High Voltage Direct Current Insulation: Effects of Slow Polarization and Applicability of Dielectric Response Theory
(Doctoral theses at NTNU, 2020:342, Doctoral thesis, 2020)The aim of this work is to contribute to an increased capacity of mass-impregnated, high voltage direct current (HVDC) cables. This has been done by providing a better understanding of the transient electric field distribution ... -
Transient nonlinear Rayleigh-Bénard convection with single-mode initiation
(Peer reviewed; Journal article, 2021)Transient nonlinear convection in a finite Prandtl number fluid heated uniformly from below is studied analytically and numerically. We consider the simple geometry of a square cavity with normal-mode compatible boundary ... -
Transient Stability Assessment of Virtual Synchronous Machine based Wind Energy Conversion System
(Master thesis, 2020)De senere års fokus på klimaendringene har tvunget frem et skifte i energisystemet. Fornybare energikilder blir integrert i stadig større grad, og omveltningen fra tradisjonell kraftproduksjon til fornybar kraftproduksjon ... -
Transient Stability in Subsea PMSM with Damper Windings - Using Finite Element Method Simulations to Identify the dq-circuit Parameters of a PMSM with a Damper Winding Sleeve
(Master thesis, 2016)Today, induction machines dominate the market for electrical machines in industrial pumping applications. This is also the case for subsea pumping applications. Permanent magnet machines are showing great promise for taking ... -
Transient temperature estimations to facilitate dynamic current rating of power cables
(Master thesis, 2020)I dag er den maksimale strømbelastningen for en strømkabel vanligvis ikke fult utnyttet. Den økende etterspørselen for elektrisk energi fører til et ønske om en mer effektiv bruk av den ubrukte kapasiteten i dagens strømnett. ... -
Transient Temperatures of Underground XLPE Power Cables - Comparison of Results from Different Calculation Methods and Full-Scale Experiment
(Master thesis, 2018)By gaining an better understanding of the limiting thermal mechanisms of the various power system components, work can be performed to increase the grid transfer capability. Of these components the underground power cable ... -
Transientanalyse av 22 kV feil i nett med transformatorer uten HS- sikringer
(Bachelor thesis, 2023)Distribusjonstransformatoren er en viktig komponent i kraftnettet. Skader og havari på den medfører store kostnader med tanke på utstyr, utrykning og nedetid for kunder. Røros E-verk har hatt problemer med transformatorhavari ... -
Transients During Energization of Unloaded Generator Step-Up Transformers
(Master thesis, 2019)En standard vannkraftstasjon i det norske kraftsystemet består av generator og transformator installert i fjellanlegg. Fra transformatoren går det kabler til et utendørs koblingsanlegg med effektbryter, samleskinne og ... -
Transition Strategies for Smart Grid: Evaluating future scenarios on a distribution grid
(Master thesis, 2022)Med en økende mengde energiproduksjon og -forbruk i distribusjonsnettet, møter distribusjonssystemoperatører utfordringer knyttet til både planlegging og drift av nettet. Høyere lasttopper og nettverkselementer med ... -
Transmission Expansion Planning in the Nordic System for Wind Power Integration based on Ant Colony Optimization
(Research report, 2011)This paper presents a transmission expansion algorithm based on ant colony optimization. It was developed and tested on a model for the Nordic area. The main focus of this work was to build a transmission expansion planning ... -
Transmission investments under uncertainty: Assessment of how different European energy scenarios for 2030 influence the North Sea Offshore Grid
(Master thesis, 2019)Nordsjønettet er ansett som et viktig prosjekt for å inkludere mer fornybar kraftproduksjon og øke integrasjon av kraftmarkeder. Nordsjøområdene har et stort potensial for offshore vindkraftproduksjon på grunn av de gunstige ... -
Transmission line unavailability due to correlated threat exposure
(Chapter, 2019)Blackouts in the power system are rare events that can have large consequences for society. Successful preparation and prevention of such events calls for models capable of predicting their occurrence. The simultaneous ... -
Transmission Loss Minimization Using Artificial Intelligent Algorithm for Nordic44 Network Model based on Hourly Load Variation
(Peer reviewed; Journal article, 2020)Optimal power flow is a nonlinear optimization method to enhance the performance and flexibility of a power system. This paper explores the use of particle swarm optimization (PSO) algorithm as an artificial intelligence ... -
Transmission solutions for connecting offshore power plants to the onshore grid
(Master thesis, 2009)The European Union has set a binding target saying 20 per cent of their energy consumption shall come from renewable energy sources within 2020. Around 4 per cent of the total amount is planned to come from offshore ... -
Traveling Wave Fault Location on HVDC-MMC Transmission Lines
(Master thesis, 2023)Med et økende behov for elektrisk energi, har høyspentsystemer med likestrøm (HVDC) blitt mer populært. Disse systemene har flere fordeler sammenlignet med høyspentsystemer basert på vekselstrøm (HVAC), blant annet ved at ... -
Tree High Impedance Fault Modelling
(Master thesis, 2023)Europe will be subject in the coming years to major changes in the energy sector, according to the plan called “REPowerEu” the goal is to reduce greenhouse gas emissions by 55% by 2030 and achieve climate neutrality by ... -
Trends and Constraints on Brazilian Photovoltaic Industry: Energy Policies, Interconnection Codes, and Equipment Certification
(Journal article; Peer reviewed, 2018)After years of dormant scenarios, the Brazilian industry of photovoltaic (PV) energy systems is now growing fast. Therefore, improving interconnection and certification codes, as well as standards, has become undeniably ... -
TSO - DSO Coordination for Voltage Control: Simulaiton Study and Use Case Development
(Master thesis, 2020)Abstract With the increasing share of DG and RES, the changing framework in the energy market, the number of traditional synchronous generators decreases, hence primary sources for voltage control are missing. Furthermore, ... -
Tuning of Control Loops for Grid-Connected Modular Multilevel Converters under a Simplified Port Representation for Large System Studies
(Chapter, 2017)One of the present barriers to the widespread use of Modular Multilevel Converters (MMC) is the complexity of its control with respect to its predecessors. This paper presents a simple procedure to tune the current and ...