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    Estimation and Forecasting of Excitation Force for Arrays of Wave Energy Devices

    Peña-Sanchez, Yerai and Garcia-Abril, Marina and Paparella, Francesco and Ringwood, John (2018) Estimation and Forecasting of Excitation Force for Arrays of Wave Energy Devices. IEEE Transactions on Sustainable Energy, 9 (4). pp. 1672-1680. ISSN 1949-3029

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    To maximise energy conversion, real-time control of a Wave Energy Converter (WEC) requires knowledge of the present and future excitation force (Fex) acting on the device, which is a non-measurable quantity. The problem of estimation and forecasting of Fex becomes more challenging when arrays of WECs are considered, due to the hydrodynamic interactions in the array. In this paper, a global Fex estimator for a complete WEC array is developed and compared to a set of independent estimators which utilise information local only to each device. A significant question is whether the array of measurements is sufficient to compensate for the greater complexity of the wave field, compared to the isolated body case. The paper shows that the global estimator is always more accurate than the independent estimator, improving up to 45% the estimation accuracy of the independent estimator. Regarding prediction, two different Fex forecasters for a WEC array are compared: a global forecaster, utilising Fex estimates from the full set of array devices, and an independent forecaster, utilising only a local Fex estimate. We demonstrate that the global forecaster achieves more accurate results, not only compared to the independent forecaster, but also compared to the isolated body case.

    Item Type: Article
    Additional Information: This is the postprint version of the article. Content may have changed prior to final publication. Citation information: DOI 10.1109/TSTE.2018.2807880, IEEE Transactions on Sustainable Energy
    Keywords: Wave Energy; Excitation Force; Estimation; Forecasting; Wave Energy Converter; Arrays; Autoregressive Model;
    Academic Unit: Faculty of Science and Engineering > Electronic Engineering
    Faculty of Science and Engineering > Research Institutes > Centre for Ocean Energy Research
    Item ID: 12424
    Identification Number:
    Depositing User: Professor John Ringwood
    Date Deposited: 10 Feb 2020 16:35
    Journal or Publication Title: IEEE Transactions on Sustainable Energy
    Publisher: Institute of Electrical and Electronics Engineers (IEEE)
    Refereed: Yes
    Funders: Science Foundation Ireland (SFI)
    Use Licence: This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here

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