Browsing NTNU Open by Author "Vrana, Til Kristian"

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    • Impact of present and future HVDC links on the nordic power grid 

      Vrana, Til Kristian; Aas, Even Strand; Reigstad, Tor Inge; Mo, Olve (Chapter; Peer reviewed, 2017)
      This article presents preliminary results from ongoing work on establishing a simulation model for R&D activities on the impact of the increasing number of HVDC links in the Nordic power grid. The total HVDC power capacity ...

    • Improving wind power market value with various aspects of diversification 

      Vrana, Til Kristian; Svendsen, Harald Georg; Korpås, Magnus; Couto, António; Estanqueiro, Ana; Flynn, Damian; Holttinen, Hannele; Härtel, Philipp; Koivisto, Matti; Lantz, Eric; Frew, Bethany (Chapter, 2023)
      The wind generation share in many European bidding zones is now large enough to affect the market value of wind power, and wind energy is getting less-than-average market price in day-ahead markets. As alternatives to ...

    • System Design and Balancing Control of the North Sea Super Grid 

      Vrana, Til Kristian (Doctoral Theses at NTNU, 1503-8181; 2013:311, Doctoral thesis, 2013)
      The construction of the North Sea Super Grid is the major step towards meetingthe future demand for electric power transmission in northern Europe. This gridwill likely also extend onshore towards the load centres, and ...

    • System impact studies for near 100% renewable energy systems dominated by inverter based variable generation 

      Holttinen, Hannele; Kiviluoma, Juha; Flynn, Damian; Smith, Charles; Orths, Antje; Eriksen, Peter Børre; Cutululis, Nicolaos Antonio; Söder, Lennart; Korpås, Magnus; Estanqueiro, Ana; MacDowell, Jason; Tuohy, Aidan; Vrana, Til Kristian; O'Malley, Mark (Peer reviewed; Journal article, 2020)
      The demand for low carbon energy calls for close to 100% renewable power systems, with decarbonization of other energy sectors adding to the anticipated paradigm shift. Rising levels of variable inverter-based renewable ...

    • Vulnerability analysis of HVDC contigencies in the Norwegian power system 

      Sperstad, Iver Bakken; Kjølle, Gerd Hovin; Gjerde, Oddbjørn; Vrana, Til Kristian; Jakobsen, Sigurd Hofsmo; Turunen, J.; Haarla, L (Chapter, 2018)
      In the increasingly interconnected and integrated European power system, transmission system operators need to consider new kinds of risk associated with the interconnection to neighbouring systems. For the Nordic power ...

    • Wind power plant grid-forming control and influences on the power train and power system oscillation 

      Khazaeli Moghadam, Farid; Vrana, Til Kristian (Chapter, 2022)
      In future power systems, wind power plants are supposed to contribute in the voltage and frequency stability of the grid. For this purpose, the control strategy of the wind power-frequency converter system needs to change ...