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Kjell Ljøkelsøy

Research Scientist

Kjell Ljøkelsøy

Research Scientist

Kjell Ljøkelsøy
Phone: 901 94 173
Email:
Department: Energy Systems
Office: Trondheim

Publications and responsibilities

Publication
https://www.sintef.no/en/publications/publication/1939905/

This paper presents a modular and easily reusable Zynq System-on-Chip (SoC) based Embedded Real-Time Simulator (ERTS) aimed for rapid prototyping of electric drives. The power hardware components of the drive including the voltage source converters (VSC) is programmed in the field programmable gate...

Authors Aravinda Perera Roy Nilsen Thomas Sagvold Haugan Kjell Ljøkelsøy
Year 2021
Type Academic chapter/article/Conference paper
Publication
https://www.sintef.no/en/publications/publication/1637260/

This paper presents a driver topology intended for WBG devices with the goal of improving the switching performance. In particular, the initial delay time of the switching transient was targeted. In high power and high frequency bridge converters, the dead time causes output voltage waveform...

Authors Ole Christian Spro Giuseppe Guidi Kjell Ljøkelsøy Magnar Hernes Ole-Morten Midtgård Tore Marvin Undeland
Year 2018
Type Academic chapter/article/Conference paper
Publication
https://www.sintef.no/en/publications/publication/1529203/

Modular Multilevel Converters are now being introduced in the power grid. Control systems for these converters are complex with many degrees of freedom. Simulation models are useful for exploring control algorithms, but there is still a need for acquiring experience from real converters. As...

Year 2017
Type Academic article
Publication
https://www.sintef.no/en/publications/publication/1061317/

A modular generator/converter system suitable for a 100kV transformerless HVDC offshore wind turbine is analyzed in this paper. The large diameter generator combined with mechanical tolerances may result in substantial parameter deviations. Therefore, the impact of such parameter variations is...

Authors Sverre Skalleberg Gjerde Kjell Ljøkelsøy Roy Nilsen Tore Marvin Undeland
Year 2014
Type Academic article
Publication
https://www.sintef.no/en/publications/publication/1133530/

A transformerless wind power generator concept with the potential to achieve 100 kV dc output is proposed in this paper. In this paper, the modular ac/dc converter system suitable for such a high-voltage generator is analyzed for normal operation and fault-tolerant modes. The control synthesis is...

Authors Sverre Skalleberg Gjerde Pål Keim Olsen Kjell Ljøkelsøy Tore Marvin Undeland
Year 2014
Type Academic article
Publication
https://www.sintef.no/en/publications/publication/1162623/

...s paper presents an experimental verification of a voltage droop control for a multi-terminal HVDC system for the grid integration of offshore wind farms. The laboratory setup is composed by four voltage-source converter terminals which aim to emulate behavior of the future power grid in the North...

Authors Raymundo E. Torres-Olguin Atle Rygg Årdal Hanne Støylen Atsede Gualu Endegnanew Kjell Ljøkelsøy John Olav Giæver Tande
Year 2014
Type Academic article