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Peak-power control of a grid-integrated oscillating water column wave energy converter

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  • Henriques, J.C.C.
  • Gato, L.M.C.
  • Lemos, J.M.
  • Gomes, R.P.F.
  • Falcão, A.F.O.

Abstract

A critical characteristic of most WECs (wave energy converters) is the large peak-to-average power ratio. This poses many challenges to the design of high-efficient PTO (power take-off) systems and, even more importantly, to integrate this form of renewable energy into power grids. The OWC (oscillating water column) WECs are devices whose PTO uses an air turbine as the primary energy converter. Besides its inherent simplicity, probably the greatest advantage of OWC based WECs is the ability to control or dissipate any excess of energy available to the PTO system that may occur in medium to highly energetic sea states. The contribution of the paper is the performance assessment of a new control algorithm to operate a HSSV (high-speed stop valve) installed in series with the turbine. The goal is to perform close-to-optimal latching control of the WEC and, simultaneously, operate the HSSV to limit the energy available to the turbine/generator set. The proposed control algorithm shows large improvements in the extracted mean power while limiting the peak-to-average power ratio, thus improving the power quality delivered to the electrical grid. Tests performed in a large-scale PTO test rig validated the algorithm.

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  • 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.
    • Handle: RePEc:eee:energy:v:109:y:2016:i:c:p:378-390
    DOI: 10.1016/j.energy.2016.04.098
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    8. 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.
    9. Carrelhas, A.A.D. & Gato, L.M.C. & Henriques, J.C.C., 2023. "Peak shaving control in OWC wave energy converters: From concept to implementation in the Mutriku wave power plant," Renewable and Sustainable Energy Reviews, Elsevier, vol. 180(C).
    10. Hayrettin Bora Karayaka & Yi-Hsiang Yu & Eduard Muljadi, 2021. "Investigations into Balancing Peak-to-Average Power Ratio and Mean Power Extraction for a Two-Body Point-Absorber Wave Energy Converter," Energies, MDPI, vol. 14(12), pages 1-24, June.
    11. Sunil Kumar Mishra & Amitkumar V. Jha & Bhargav Appasani & Nicu Bizon & Phatiphat Thounthong & Pongsiri Mungporn, 2023. "Ocean Wave Energy Control Using Aquila Optimization Technique," Energies, MDPI, vol. 16(11), pages 1-21, June.
    12. 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.
    13. Ramos, V. & López, M. & Taveira-Pinto, F. & Rosa-Santos, P., 2017. "Influence of the wave climate seasonality on the performance of a wave energy converter: A case study," Energy, Elsevier, vol. 135(C), pages 303-316.
    14. Markel Penalba & John V. Ringwood, 2016. "A Review of Wave-to-Wire Models for Wave Energy Converters," Energies, MDPI, vol. 9(7), pages 1-45, June.
    15. Suchithra, R. & Ezhilsabareesh, K. & Samad, Abdus, 2019. "Optimization based higher order sliding mode controller for efficiency improvement of a wave energy converter," Energy, Elsevier, vol. 187(C).
    16. Wu, Jinming & Yao, Yingxue & Zhou, Liang & Göteman, Malin, 2018. "Real-time latching control strategies for the solo Duck wave energy converter in irregular waves," Applied Energy, Elsevier, vol. 222(C), pages 717-728.
    17. Rosati, Marco & Ringwood, John V., 2023. "Control co-design of power take-off and bypass valve for OWC-based wave energy conversion systems," Renewable Energy, Elsevier, vol. 219(P2).
    18. Henriques, J.C.C. & Portillo, J.C.C. & Sheng, W. & Gato, L.M.C. & Falcão, A.F.O., 2019. "Dynamics and control of air turbines in oscillating-water-column wave energy converters: Analyses and case study," Renewable and Sustainable Energy Reviews, Elsevier, vol. 112(C), pages 571-589.
    19. 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.
    20. Jin, Siya & Patton, Ron J. & Guo, Bingyong, 2019. "Enhancement of wave energy absorption efficiency via geometry and power take-off damping tuning," Energy, Elsevier, vol. 169(C), pages 819-832.
    21. 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.
    22. Liu, Zhen & Cui, Ying & Li, Ming & Shi, Hongda, 2017. "Steady state performance of an axial impulse turbine for oscillating water column wave energy converters," Energy, Elsevier, vol. 141(C), pages 1-10.
    23. Das, Tapas K. & Samad, Abdus, 2020. "Influence of stall fences on the performance of Wells turbine," Energy, Elsevier, vol. 194(C).

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