Contribuições para a Avaliação Técnica da Energia das Ondas em Portugal: O Caso do Pico (Açores) (Contributions to the Technical Assessment of Wave Energy in Portugal: The Case of Pico (Azores))

Renato Veloso (, Rui Castro (

1IST - Universidade de Lisboa
2INESC-ID/IST - Universidade de Lisboa

This paper appears in: Revista IEEE América Latina

Publication Date: Sept. 2015
Volume: 13,   Issue: 9 
ISSN: 1548-0992

Ocean waves have a high potential to become a reference among the renewable energies with economic viability, in the future. Currently, there is in Portugal a WaveRoller technology experimental facility delivering power to the grid. However, Oscillating Water Column (OWC) is the most used technology to capture the energy from the waves. In this paper, a full integrated model of an OWC installation is presented. This model incorporates dedicated models of its components: pneumatic chamber, Wells turbine and Doubly Fed Induction Generator (DFIG). Data to feed the model is taken from Pico (Azores) power plant. The implementation in MATLAB®/Simulink® environment allows to carry on some simulations, regarding the behavior of the OWC system in the presence of pressure increases in the pneumatic chamber (meaning a higher airflow in the turbine). The results allow the conclusion that the speed control feature is crucial to obtain an optimized operation of the system.

Index Terms:
Wave energy, Oscillating Water Column, Wells turbine, Doubly Fed Induction Generator.   

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