Rotational Speed Control of an OWC Wave Power Plant

[+] Author and Article Information
P. A. P. Justino

Departamento de Energias Renováveis, Instituto Nacional de Engenharia e Tecnologia Industrial, Estrada do Paço do Lumiar, 1699 Lisboa Codex, Portugal

A. F. de O. Falcão

Departamento de Engenharia Mecânica, Instituto Superior Técnico, Avenida Rovisco Pais, 1096 Lisboa Codex, Portugal

J. Offshore Mech. Arct. Eng 121(2), 65-70 (May 01, 1999) (6 pages) doi:10.1115/1.2830079 History: Received May 08, 1998; Revised August 20, 1998; Online December 17, 2007


The paper deals with the control of an oscillating water column wave energy plant, equipped with a Wells turbine driving a variable speed electric generator. The control of the plant is achieved by changing the electric torque through the power conditioning equipment. The control has to meet several requirements: rotational speed allowable range, energy quality, and allowable fluctuations in power delivered to the grid. On the other hand, the turbine is expected to perform efficiently, and so its rotational speed should approximately match the sea conditions (it should be higher in more energetic sea states). Three different control strategies are described. Results of numerical simulations are presented for two of them, and are found to satisfy the prescribed requirements.

Copyright © 1999 by The American Society of Mechanical Engineers
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