Apply blade element momentum theory in matching a wind turbine system

Author(s): Jui –Hsiang Kao, Yan-Jhang Lin, Yu-Why Huang
Department of Systems Engineering and Naval Architecture National Taiwan Ocean University No.2, Peining Rd., Jhongjheng District, Keelung City 20224, Taiwan
International Journal of Smart Grid and Clean Energy, vol. 9, no. 1, January 2020: pp. 44-51
ISSN: 2315-4462 (Print)
ISSN: 2373-3594 (Online)
Digital Object Identifier: 10.12720/sgce.9.1.44-51

Abstract: The objective of this paper is to apply Blade Element Momentum Theory in matching the turbine blades and the generator to increase the efficiency of the wind turbine, and the matching process is developed. As the turbine blades are not matched well with the generator in advance, the optimal design of the turbine blades can’t attain the expected performance, and the controller can’t increase the power capture. Thus, the matching problem is worthy of being discussed. The T (torque)–N (r/min) curves of turbine blades are calculated by Blade Element Momentum Theory. As the optimal voltage mode of the generator is selected, the characteristics of the operating points, such as tip speed ratio, revolutions per minute, blade torque, and efficiency, can be identified by the crossover point of the T–N curves of the turbine blades and the generator. A horizontal upwind turbine is treated as the study case here to illustrate the computing and matching processes.

Keywords: Blade element momentum theory, turbine blades, generator, T–N curve, tip speed ratio
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