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    Receding-Horizon Energy-Maximising Optimal Control of Wave Energy Systems Based on Moments


    Faedo, Nicolás and Peña-Sanchez, Yerai and Ringwood, John (2021) Receding-Horizon Energy-Maximising Optimal Control of Wave Energy Systems Based on Moments. IEEE Transactions on Sustainable Energy, 12 (1). pp. 378-386. ISSN 1949-3029

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    Abstract

    In this study, we address the issue of real-time energy maximising control for wave energy converters (WECs), by proposing a receding-horizon optimal control framework based on the concept of a moment. This approach is achieved by extending the so-called moment-based framework, recently published in the WEC literature, to effectively solve the associated optimal control problem within a finite time-horizon, allowing for real-time performance, and a straightforward inclusion of the wave excitation force Fe estimation and forecasting requirements, which are intrinsic to the wave energy control application. We present a case study, based on a CorPower-like device, subject to both state and input constraints. We show that the proposed strategy can perform almost identically to the ideal performance case, where full knowledge of Fe over the time-horizon is assumed available. Moreover, a sensitivity analysis is provided, addressing the impact of wave excitation force estimation and forecasting errors in the computation of the moment-based control input. Two main conclusions can be drawn from this analysis: Forecasting mismatch has a negligible impact on the overall performance of the strategy, while potential differences arising from estimating Fe, in particular, phase errors, can substantially impact total energy absorption

    Item Type: Article
    Keywords: Wave energy; WEC; receding-horizon; energy-maximising control, optimal control; moment-domain;
    Academic Unit: Faculty of Science and Engineering > Electronic Engineering
    Faculty of Science and Engineering > Research Institutes > Centre for Ocean Energy Research
    Item ID: 16274
    Identification Number: https://doi.org/10.1109/TSTE.2020.3000013
    Depositing User: Professor John Ringwood
    Date Deposited: 06 Jul 2022 13:56
    Journal or Publication Title: IEEE Transactions on Sustainable Energy
    Publisher: Institute of Electrical and Electronics Engineers (IEEE)
    Refereed: Yes
    URI:

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