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Experimental Vertical Axis Wind Turbine System
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Electricity.
2010 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

Vertical axis wind turbines may have mechanical advantages compared to conventional horizontal axis wind turbines, which make vertical turbines interesting to study. A 12 kW straight-bladed Darrieus turbine has been designed and constructed by the Division of Electricity at Uppsala University. The aim of the project was to build a small scale model of a turbine that was system optimized, not optimized part by part. The constructed turbine has no mechanical control systems such as blade pitching; it is instead regulated electrically by power electronics connected to the generator. A control system has been built that can run the turbine at constant optimum tip speed ratio. To start the turbine a simple robust electrical starter has been developed. It consists of a six-step modulated inverter which is feedback-controlled from the generator rotor position. The power coefficient as a function of the tip speed ratio was determined during a long measurement campaign performed in spring 2009. The top power coefficient was measured to 0.29 at a tip speed ratio of 3.3.

Place, publisher, year, edition, pages
Uppsala: Institutionen för teknikvetenskaper, Uppsala universitet , 2010. , 61 p.
UURIE / Uppsala University, Department of Engineering Sciences, ISSN 0349-8352 ; 318-10L
National Category
Engineering and Technology
URN: urn:nbn:se:uu:diva-143182OAI: oai:DiVA.org:uu-143182DiVA: diva2:389609
Available from: 2011-01-20 Created: 2011-01-19 Last updated: 2011-01-20Bibliographically approved

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