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Rotational speed control and electrical rated power of an oscillating-water-column wave energy converter

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  • Falcão, A.F.O.
  • Henriques, J.C.C.
  • Gato, L.M.C.

Abstract

The oscillating-water-column device equipped with an air turbine is regarded by many researchers and developers as the simplest and most reliable wave energy converter. It has been object of extensive development effort, including the deployment of prototypes into the sea. The maximization of the produced electrical energy involves the control of the rotational speed, which affects the hydrodynamic process of wave energy absorption, the turbine aerodynamics and the performance of the electrical equipment. In the paper, the overall performance of the plant is modelled as an integrated process, with the hydrodynamic modelling based on linear water wave theory. Special account is taken of the electrical efficiency dependence on the load factor and of the constraint introduced by electrical rated power as a power level that should not be exceeded. A case study was selected to investigate these issues: the existing bottom-standing plant on the shoreline of the island of Pico, in the Azores Archipelago. Results are presented for the control of the self-rectifying air turbine of biradial type and for the annually produced electrical energy as affected by turbine size and by electrical rated power.

Suggested Citation

  • Falcão, A.F.O. & Henriques, J.C.C. & Gato, L.M.C., 2017. "Rotational speed control and electrical rated power of an oscillating-water-column wave energy converter," Energy, Elsevier, vol. 120(C), pages 253-261.
    • Handle: RePEc:eee:energy:v:120:y:2017:i:c:p:253-261
    DOI: 10.1016/j.energy.2016.11.078
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    References listed on IDEAS

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    1. Ceballos, Salvador & Rea, Judy & Robles, Eider & Lopez, Iraide & Pou, Josep & O'Sullivan, Dara, 2015. "Control strategies for combining local energy storage with wells turbine oscillating water column devices," Renewable Energy, Elsevier, vol. 83(C), pages 1097-1109.
    2. 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.
    3. Henriques, J.C.C. & Gato, L.M.C. & Lemos, J.M. & Gomes, R.P.F. & Falcão, A.F.O., 2016. "Peak-power control of a grid-integrated oscillating water column wave energy converter," Energy, Elsevier, vol. 109(C), pages 378-390.
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    Cited by:

    1. Roh Chan & Kil-Won Kim & Ji-Yong Park & Se-Wan Park & Kyong-Hwan Kim & Sang-Shin Kwak, 2020. "Power Performance Analysis According to the Configuration and Load Control Algorithm of Power Take-Off System for Oscillating Water Column Type Wave Energy Converters," Energies, MDPI, vol. 13(23), pages 1-30, December.
    2. Scialò, A. & Henriques, J.C.C. & Malara, G. & Falcão, A.F.O. & Gato, L.M.C. & Arena, F., 2021. "Power take-off selection for a fixed U-OWC wave power plant in the Mediterranean Sea: The case of Roccella Jonica," Energy, Elsevier, vol. 215(PA).
    3. Oscar Barambones & Jose M. Gonzalez de Durana & Isidro Calvo, 2018. "Adaptive Sliding Mode Control for a Double Fed Induction Generator Used in an Oscillating Water Column System," Energies, MDPI, vol. 11(11), pages 1-27, October.
    4. Falcão, António F.O. & Henriques, João C.C., 2019. "The spring-like air compressibility effect in oscillating-water-column wave energy converters: Review and analyses," Renewable and Sustainable Energy Reviews, Elsevier, vol. 112(C), pages 483-498.
    5. Faÿ, François-Xavier & Henriques, João C. & Kelly, James & Mueller, Markus & Abusara, Moahammad & Sheng, Wanan & Marcos, Marga, 2020. "Comparative assessment of control strategies for the biradial turbine in the Mutriku OWC plant," Renewable Energy, Elsevier, vol. 146(C), pages 2766-2784.
    6. Correia da Fonseca, F.X. & Henriques, J.C.C. & Gato, L.M.C. & Falcão, A.F.O., 2019. "Oscillating flow rig for air turbine testing," Renewable Energy, Elsevier, vol. 142(C), pages 373-382.
    7. Liu, Zhen & Cui, Ying & Xu, Chuanli & Sun, Lixin & Li, Ming & Jin, Jiyuan, 2019. "Experimental and numerical studies on an OWC axial-flow impulse turbine in reciprocating air flows," Renewable and Sustainable Energy Reviews, Elsevier, vol. 113(C), pages 1-1.

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