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    Simple Controllers for Wave Energy Devices Compared


    García-Violini, Demián and Faedo, Nicolás and Jaramillo-Lopez, Fernando and Ringwood, John (2020) Simple Controllers for Wave Energy Devices Compared. Journal of Marine Science and Engineering, 8 (793). ISSN 2077-1312

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    Abstract

    The design of controllers for wave energy devices has evolved from early monochromatic impedance-matching methods to complex numerical algorithms that can handle panchromatic seas, constraints, and nonlinearity. However, the potential high performance of such numerical controller comes at a computational cost, with some algorithms struggling to implement in real-time, and issues surround convergence of numerical optimisers. Within the broader area of control engineering, practitioners have always displayed a fondness for simple and intuitive controllers, as evidenced by the continued popularity of the ubiquitous PID controller. Recently, a number of energy-maximising wave energy controllers have been developed based on relatively simple strategies, stemming from the fundamentals behind impedance-matching. This paper documents this set of (5) controllers, which have been developed over the period 2010–2020, and compares and contrasts their characteristics, in terms of energy-maximising performance, the handling of physical constraints, and computational complexity. The comparison is carried out both analytically and numerically, including a detailed case study, when considering a state-of-the-art CorPower-like device.

    Item Type: Article
    Additional Information: Funding: This research was funded by Science Foundation Ireland under grant number SFI/13/IA/1886 and Grant No. 12/RC/2302 for the Marine Renewable Ireland (MaREI) centre. © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). Cite as: García-Violini, D.; Faedo, N.; Jaramillo-Lopez, F.; Ringwood, J.V. Simple Controllers for Wave Energy Devices Compared. J. Mar. Sci. Eng. 2020, 8, 793. https://doi.org/10.3390/jmse8100793
    Keywords: wave energy; wave energy converter; energy-maximising control; optimal control; impedance-matching; renewable energy systems;
    Academic Unit: Faculty of Science and Engineering > Research Institutes > Centre for Ocean Energy Research
    Faculty of Science and Engineering > Electronic Engineering
    Item ID: 14338
    Identification Number: https://doi.org/10.3390/jmse8100793
    Depositing User: Professor John Ringwood
    Date Deposited: 14 Apr 2021 15:38
    Journal or Publication Title: Journal of Marine Science and Engineering
    Publisher: MDPI AG
    Refereed: Yes
    URI:

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