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Latching control of a floating oscillating-water-column wave energy converter

Author

Listed:
  • Henriques, J.C.C.
  • Gato, L.M.C.
  • Falcão, A.F.O.
  • Robles, E.
  • Faÿ, F.-X.

Abstract

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.

Suggested Citation

  • Henriques, J.C.C. & Gato, L.M.C. & Falcão, A.F.O. & Robles, E. & Faÿ, F.-X., 2016. "Latching control of a floating oscillating-water-column wave energy converter," Renewable Energy, Elsevier, vol. 90(C), pages 229-241.
    • Handle: RePEc:eee:renene:v:90:y:2016:i:c:p:229-241
    DOI: 10.1016/j.renene.2015.12.065
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    References listed on IDEAS

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    1. Falcão, António F.O. & Henriques, João C.C., 2016. "Oscillating-water-column wave energy converters and air turbines: A review," Renewable Energy, Elsevier, vol. 85(C), pages 1391-1424.
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    5. Henriques, J.C.C. & Gomes, R.P.F. & Gato, L.M.C. & Falcão, A.F.O. & Robles, E. & Ceballos, S., 2016. "Testing and control of a power take-off system for an oscillating-water-column wave energy converter," Renewable Energy, Elsevier, vol. 85(C), pages 714-724.
    6. Gomes, R.P.F. & Henriques, J.C.C. & Gato, L.M.C. & Falcão, A.F.O., 2012. "Hydrodynamic optimization of an axisymmetric floating oscillating water column for wave energy conversion," Renewable Energy, Elsevier, vol. 44(C), pages 328-339.
    7. Falcão, A.F.O. & Gato, L.M.C. & Nunes, E.P.A.S., 2013. "A novel radial self-rectifying air turbine for use in wave energy converters," Renewable Energy, Elsevier, vol. 50(C), pages 289-298.
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