DocumentCode :
675124
Title :
Evaluation of the MPPT performance in small wind turbines by estimating the tip-speed ratio
Author :
Gevaert, Louis F. M. ; De Kooning, Jeroen D. M. ; Vandoorn, Tine L. ; Van de Vyver, Jan ; Vandevelde, Lieven
Author_Institution :
Dept. of Electr. Energy, Syst. & Autom. (EESA), Ghent Univ., Ghent, Belgium
fYear :
2013
fDate :
2-5 Sept. 2013
Firstpage :
1
Lastpage :
5
Abstract :
In this paper, a method for online estimation of the tip speed ratio (TSR) of small wind turbines is presented, in order to evaluate the MPPT performance. Unlike obvious methods, for which an encoder or resolver is needed, the presented method only requires measurements of the wind speed and the generator current. Firstly, the accuracy of the presented method is evaluated by using a wind turbine emulator. The obtained results show that the method is suitable for accurately determining both the shaft speed and the TSR of a small wind turbine. This method of estimating the TSR is promising given its simplicity and applicability in the full range of synchronous generators. In addition, by comparing the estimated TSR with the optimum TSR, the MPPT performance can be evaluated. Secondly, the TSR of a commercially available small wind turbine is measured by using the presented method and the MPPT performance is evaluated. In conclusion, the MPPT of the tested turbine can be improved, allowing a considerable increase in the yearly energy output.
Keywords :
electric current measurement; maximum power point trackers; velocity measurement; wind turbines; MPPT performance; generator current measurement; small wind turbines; synchronous generators; tip speed ratio; wind speed measurement; wind turbine emulator; Current measurement; Generators; Maximum power point trackers; Optimized production technology; Shafts; Wind speed; Wind turbines; Maximum power point tracking; Power coefficient; Shaft speed estimation; Small wind turbines; Tip speed ratio; Wind energy;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Power Engineering Conference (UPEC), 2013 48th International Universities'
Conference_Location :
Dublin
Type :
conf
DOI :
10.1109/UPEC.2013.6714990
Filename :
6714990
Link To Document :
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