Journal
RENEWABLE ENERGY
Volume 90, Issue -, Pages 229-241Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.renene.2015.12.065
Keywords
Wave energy; Oscillating-water-column; Latching control; Receding horizon; OWC spar-buoy
Funding
- European Community's Seventh Framework Programme under MARINET (Marine Renewables Infrastructure Network)
- Portuguese Foundation for Science and Technology (FCT) under LAETA [Pest-OE/EME/LA0022, PTDC/EME-MFE/111763/2009]
- FCT [IF/01457/2014]
- OceaNET project
- European Union's Seventh Framework Programme [607656]
- Portuguese Foundation for Science and Technology (FCT) through IDMEC
- Fundação para a Ciência e a Tecnologia [PTDC/EME-MFE/111763/2009] Funding Source: FCT
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The OWC spar-buoy is an axisymmetric floating version of an oscillating-water-column (OWC) based device whose power take-off (PTO) system is an air turbine/generator set. Latching has been regarded as one of the most promising techniques to improve the efficiency of wave energy converters. In the case of the OWC spar-buoy, latching control is performed by opening/closing a high-speed stop valve installed in series with the turbine. The present paper has three main objectives. Firstly, to assess the performance improvements that can be achieved with a latching control strategy within a receding horizon framework. Secondly, to establish the practical requirements of this type of control by evaluating the sensitivity of the turbine power output to several receding horizon time intervals. Finally, to test and validate experimentally the proposed algorithms in a small-scale PTO test rig. All the experimental tests were performed considering irregular wave conditions. (C) 2015 Elsevier Ltd. All rights reserved.
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