Browsing NTNU Open by Author "Gjerde, Sverre Skalleberg"
Now showing items 1-7 of 7
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A Modular Series Connected Converter for a 10 MW, 36 kV, Transformer-Less Offshore Wind Power Generator Drive
Gjerde, Sverre Skalleberg; Undeland, Tore Marvin (Journal article; Peer reviewed, 2012)In the future, large offshore wind turbines are expected to reach a rating of 10 MW. To reduce the corresponding weight increase of the nacelle, research has started to focus on solutions to omit the step-up transformer ... -
A Slim Wind Turbine Concept with Low Frequency AC Connection
Hole, Andreas Nyhagen (Master thesis, 2016)This thesis aims to investigate the feasibility of using a slim wind turbine concept together with a low frequency alternating current (LFAC) transmission system in an offshore wind farm system. By a slim wind turbine ... -
Analysis and Control of a Modular Series ConnectedConverter for a Transformerless Offshore Wind Turbine
Gjerde, Sverre Skalleberg (Doktoravhandlinger ved NTNU, 1503-8181; 2013:279, Doctoral thesis, 2013)A modular series connected converter consisting of N number of converter units, suitable for a high power, high voltage transformerless offshore wind turbine is analyzed in this thesis. The main objective is to verify the ... -
Integrated Modelling Platform for Dynamic Performance Assessment of Floating Wind Turbines
Endegnanew, Atsede Gualu; Satertro, Kristian; Gjerde, Sverre Skalleberg; Svendsen, Harald Georg; Anaya-Lara, Olimpo; Tande, John Olav Giæver; Uhlen, Kjetil; Gjolmesli, Svein (Peer reviewed; Journal article, 2015)The paper presents an integrated modelling platform that can be used to assess the dynamic performance of an offshore wind turbine mounted on a spar-buoy type floater. Sub-models of generator and converter controllers and ... -
Laboratory Verification of the Modular Converter for a 100 kV DC Transformerless Offshore Wind Turbine Solution
Gjerde, Sverre Skalleberg; Ljøkelsøy, Kjell; Undeland, Tore Marvin (Journal article; Peer reviewed, 2013)In this paper, an experimental verification of the control of a modular series connected voltage source converter suitable for an HVDC transformerless offshore wind turbine is presented. The test bench is built around a ... -
Multilevel Converters for a 10 MW, 100 kV Transformer-less Offshore Wind Generator System
Iversen, Tor Martin (Master thesis, 2012)The size of offshore wind generators is increasing, and the trend is moving towards full converter gear-less solutions with permanent magnet synchronous generators (PMSG). The nacelle weight reduction is a key design ... -
STATCOM and Energy Storage in Grid Integration of Wind Farms
Gjerde, Sverre Skalleberg (Master thesis, 2009)In this work, a STAtic synchronous COMpensator (STATCOM) with energy storage system for wind power application has been treated. This device was proposed as a mean to improve voltage stability and power transmission by ...