Experimental Vertical Axis Wind Turbine System
2010 (English)Licentiate thesis, comprehensive summary (Other academic)
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
Engineering and Technology
IdentifiersURN: urn:nbn:se:uu:diva-143182OAI: oai:DiVA.org:uu-143182DiVA: diva2:389609