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Modelling of a Three-Body Hinge-Barge Wave Energy Device Using System Identification Techniques

Author

Listed:
  • Fernando Jaramillo-Lopez

    (Centre for Ocean Energy Research (COER), Maynooth University, W23 F2H6 Co. Kildare, Ireland)

  • Brian Flannery

    (Department of Civil and Environmental Engineering, University College Cork, P43 C573 Co. Cork, Ireland)

  • Jimmy Murphy

    (Department of Civil and Environmental Engineering, University College Cork, P43 C573 Co. Cork, Ireland)

  • John V. Ringwood

    (Centre for Ocean Energy Research (COER), Maynooth University, W23 F2H6 Co. Kildare, Ireland)

Abstract

In order to increase the prevalence of wave energy converters (WECs), they must provide energy at competitive prices, especially when compared with other renewable energy sources. Thus, it is imperative to develop control system technologies that are able to maximize energy extraction from waves, such that the delivered energy cost is reduced. An important part of a model-based controller is the model that it uses. System identification techniques (SITs) provide methodologies to get accurate dynamic models from input-output data. However, even though these techniques are well developed in other application areas, they are seldom used in the context of WECs. This paper proposes several strategies based on SIT to get a linear time-invariant model for a three-body hinge-barge wave energy device using experimental data. The main advantage of the model obtained with this methodology, against other methods such as linear potential theory, is that this model remains valid even for relatively large waves and WEC displacements. Other advantages of this model are its simplicity and the low computational resources that it needs. Numerical simulations are carried out to show the validation of the obtained model against recorded experimental data.

Suggested Citation

  • Fernando Jaramillo-Lopez & Brian Flannery & Jimmy Murphy & John V. Ringwood, 2020. "Modelling of a Three-Body Hinge-Barge Wave Energy Device Using System Identification Techniques," Energies, MDPI, vol. 13(19), pages 1-16, October.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:19:p:5129-:d:422901
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    References listed on IDEAS

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    1. Giorgio Bacelli & Ryan G. Coe & David Patterson & David Wilson, 2017. "System Identification of a Heaving Point Absorber: Design of Experiment and Device Modeling," Energies, MDPI, vol. 10(4), pages 1-33, April.
    2. Stansby, P. & Carpintero Moreno, E. & Stallard, T. & Maggi, A., 2015. "Three-float broad-band resonant line absorber with surge for wave energy conversion," Renewable Energy, Elsevier, vol. 78(C), pages 132-140.
    3. Yu, Hui-Feng & Zhang, Yong-Liang & Zheng, Si-Ming, 2016. "Numerical study on the performance of a wave energy converter with three hinged bodies," Renewable Energy, Elsevier, vol. 99(C), pages 1276-1286.
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    1. Wang, LiGuo & Ringwood, John V., 2021. "Control-informed ballast and geometric optimisation of a three-body hinge-barge wave energy converter using two-layer optimisation," Renewable Energy, Elsevier, vol. 171(C), pages 1159-1170.

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