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Analysis of electrical drive speed control limitations of a power take-off system for wave energy converters

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  • Gaspar, José F.
  • Kamarlouei, Mojtaba
  • Sinha, Ashank
  • Xu, Haitong
  • Calvário, Miguel
  • Faÿ, François-Xavier
  • Robles, Eider
  • Guedes Soares, C.

Abstract

The active control of wave energy converters with oil-hydraulic power take-off systems presents important demands on the electrical drives attached to their pumps, in particular on the required drive accelerations and rotational speeds. This work analyzes these demands on the drives and designs reliable control approaches for such drives by simulating a wave-to-wire model in a hardware in-the-loop simulation test rig. The model is based on a point absorber wave energy converter, being the wave, hydrodynamic and oil-hydraulic part simulated in a computer that sends and receives signals from the real embedded components, such as the drive generator, controller and back-to-back converter. Three different control strategies are developed and tested in this test rig and the results revealed that despite the drive limitations to acceleration levels, well above 1 × 104 rpm/s, these do not significantly affect the power take-off efficiency, because the required acceleration peaks rarely achieve these values. Moreover this drive is much more economical than an oil-hydraulic and equivalent one that is able to operate at those peaks of acceleration.

Suggested Citation

  • Gaspar, José F. & Kamarlouei, Mojtaba & Sinha, Ashank & Xu, Haitong & Calvário, Miguel & Faÿ, François-Xavier & Robles, Eider & Guedes Soares, C., 2017. "Analysis of electrical drive speed control limitations of a power take-off system for wave energy converters," Renewable Energy, Elsevier, vol. 113(C), pages 335-346.
    • Handle: RePEc:eee:renene:v:113:y:2017:i:c:p:335-346
    DOI: 10.1016/j.renene.2017.05.085
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    References listed on IDEAS

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    1. 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.
    2. 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.
    3. Henderson, Ross, 2006. "Design, simulation, and testing of a novel hydraulic power take-off system for the Pelamis wave energy converter," Renewable Energy, Elsevier, vol. 31(2), pages 271-283.
    4. Rico H. Hansen & Morten M. Kramer & Enrique Vidal, 2013. "Discrete Displacement Hydraulic Power Take-Off System for the Wavestar Wave Energy Converter," Energies, MDPI, vol. 6(8), pages 1-44, August.
    5. Gaspar, José F. & Calvário, Miguel & Kamarlouei, Mojtaba & Guedes Soares, C., 2016. "Power take-off concept for wave energy converters based on oil-hydraulic transformer units," Renewable Energy, Elsevier, vol. 86(C), pages 1232-1246.
    6. 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.
    7. Gaspar, José F. & Kamarlouei, Mojtaba & Sinha, Ashank & Xu, Haitong & Calvário, Miguel & Faÿ, François-Xavier & Robles, Eider & Soares, C. Guedes, 2016. "Speed control of oil-hydraulic power take-off system for oscillating body type wave energy converters," Renewable Energy, Elsevier, vol. 97(C), pages 769-783.
    8. Zhang, Dahai & Li, Wei & Lin, Yonggang & Bao, Jingwei, 2012. "An overview of hydraulic systems in wave energy application in China," Renewable and Sustainable Energy Reviews, Elsevier, vol. 16(7), pages 4522-4526.
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    Cited by:

    1. Mohd Afifi Jusoh & Mohd Zamri Ibrahim & Muhamad Zalani Daud & Aliashim Albani & Zulkifli Mohd Yusop, 2019. "Hydraulic Power Take-Off Concepts for Wave Energy Conversion System: A Review," Energies, MDPI, vol. 12(23), pages 1-23, November.
    2. Gaspar, José F. & Calvário, Miguel & Kamarlouei, Mojtaba & Soares, C. Guedes, 2018. "Design tradeoffs of an oil-hydraulic power take-off for wave energy converters," Renewable Energy, Elsevier, vol. 129(PA), pages 245-259.

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