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Improving the OWC Wave Energy Converter Power Take-Off Efficiency throughout Experimental and Numerical Characterisation of an SCIG

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  • Joseba Lopez-Mendia

    (TECNALIA, Basque Research and Technology Alliance (BRTA), Parque Tecnológico de Bizkaia, Astondo Bidea, Edificio 700 E, 48160 Derio, Spain
    Department of Electronics Technology, University of the Basque Country UPV/EHU, 48013 Bilbao, Spain)

  • Eider Robles

    (TECNALIA, Basque Research and Technology Alliance (BRTA), Parque Tecnológico de Bizkaia, Astondo Bidea, Edificio 700 E, 48160 Derio, Spain
    Automatics and System Engineering Department, University of the Basque Country UPV/EHU, 48013 Bilbao, Spain)

  • Salvador Ceballos

    (TECNALIA, Basque Research and Technology Alliance (BRTA), Parque Tecnológico de Bizkaia, Astondo Bidea, Edificio 700 E, 48160 Derio, Spain
    Department of Electronics Technology, University of the Basque Country UPV/EHU, 48013 Bilbao, Spain)

  • Pablo Ruiz-Minguela

    (TECNALIA, Basque Research and Technology Alliance (BRTA), Parque Tecnológico de Bizkaia, Astondo Bidea, Edificio 700 E, 48160 Derio, Spain)

  • Jacobo Rotger

    (Energy Engineering Department, University of the Basque Country UPV/EHU, 48013 Bilbao, Spain)

Abstract

The increasing interest in the use of renewable energy technologies is directing attention towards the potential contribution of marine energy technologies, especially ocean wave energy, to world energy demand. While open-sea demonstrations of full-scale devices have been carried out to validate several technologies, the focus now is shifting to optimising the components for efficiency and reliability. The efficiency of the electrical generator plays a crucial role in wave-to-wire numerical models for converting wave energy into usable electricity. It provides essential data that enables the industry to reduce technical risks and uncertainties. Wave-to-wire models typically simplify the generator’s efficiency through assuming a single curve based on the load. This curve is usually provided by the machine manufacturers for the nominal rotational speed. However, the rotational speed varies in the case of air turbines used in OWC devices. Therefore, to accurately estimate decision variables derived from these models, a comprehensive efficiency map is necessary. This map should demonstrate the performance at different rotational speeds and loads, as it directly influences the estimation of key parameters. The main objective of the present work is to improve the generator behaviour of an OWC for different generator operation regimes. For this purpose, a numerical model of the generator’s efficiency will be developed throughout the segregation of losses and validated experimentally. Finally, an optimal control law will be presented to maximise the electrical power output of the wave energy converter, considering the efficiency of both the generator and the turbine.

Suggested Citation

  • Joseba Lopez-Mendia & Eider Robles & Salvador Ceballos & Pablo Ruiz-Minguela & Jacobo Rotger, 2024. "Improving the OWC Wave Energy Converter Power Take-Off Efficiency throughout Experimental and Numerical Characterisation of an SCIG," Energies, MDPI, vol. 17(5), pages 1-22, February.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:5:p:1146-:d:1347765
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    References listed on IDEAS

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    1. Faÿ, François-Xavier & Robles, Eider & Marcos, Marga & Aldaiturriaga, Endika & Camacho, Eduardo F., 2020. "Sea trial results of a predictive algorithm at the Mutriku Wave power plant and controllers assessment based on a detailed plant model," Renewable Energy, Elsevier, vol. 146(C), pages 1725-1745.
    2. Giovanni Bucci & Fabrizio Ciancetta & Edoardo Fiorucci & Simone Mari & Maria Anna Segreto, 2019. "The Measurement of Additional Losses in Induction Motors: Discussion about the Actually Achievable Uncertainty," Energies, MDPI, vol. 13(1), pages 1-13, December.
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