Title: Wind turbine power coefficient real-time identification

Authors: A. Monroy, L. Alvarez-Icaza

Addresses: Instituto de Ingenieria, Universidad Nacional Autonoma de Mexico, 04510 Coyoacan DF, Mexico. ' Instituto de Ingenieria, Universidad Nacional Autonoma de Mexico, 04510 Coyoacan DF, Mexico

Abstract: A scheme for real-time identification of a wind turbine power coefficient curve is presented. Knowledge of this curve is important to maximise the generated electric power. The precise shape of this curve is difficult to predict as it depends on several factors: air density, humidity, temperature, wind speed and tip speed. Once the power coefficient curve is found, it is possible to propose reference power points appropriate for the turbine mode of operation that are fed to a controller of the electric generator. Two models for this surface are proposed whose parameters can be identified in real-time. The first model considers variations on the blade angle and the other is a simplified model useful for variable speed wind turbines. Simulation results show good performance of this identification scheme.

Keywords: wind energy; power coefficient; modelling; real-time identification; wind turbines; wind power; wind turbines; turbine blade angle; variable speed; simulation.

DOI: 10.1504/IJMIC.2009.024457

International Journal of Modelling, Identification and Control, 2009 Vol.6 No.3, pp.181 - 187

Published online: 05 Apr 2009 *

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