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Annual Review of Control, Robotics, and Autonomous Systems

Volume 7, 2024

A Control Framework for Ocean Wave Energy Conversion Systems: The Potential of Moments

  • Nicolás Faedo1 and John V. Ringwood2
  • 1Marine Offshore Renewable Energy Lab, Department of Mechanical and Aerospace Engineering, Politecnico di Torino, Turin, Italy; email: [email protected] 2Centre for Ocean Energy Research, Department of Electronic Engineering, Maynooth University, Maynooth, Ireland; email: [email protected]
  • Vol. 7:227-252 (Volume publication date July 2024)
  • First published as a Review in Advance on November 14, 2023
  • Copyright © 2024 by the author(s).
    This work is licensed under a Creative Commons Attribution 4.0 International License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. See credit lines of images or other third-party material in this article for license information.

Abstract

The control of wave energy converters (WECs) to maximize power capture is a challenging problem. In particular, the nature of the wave excitation, which is in general panchromatic (or multi-sinusoidal), presents a reciprocating energy source that needs to be rectified through some means. In addition, the development of suitable control-oriented models is also challenging, requiring correct representation of system hydrodynamics and power take-off (PTO) components, while also lending themselves to control synthesis and real-time computational performance, along with a challenging optimal control problem. This article presents a moment-based mathematical framework for the formulation and solution of WEC control. It shows that moments are ideally suited to WEC control in terms of their ability to accurately characterize the nature of the wave excitation force (and the consequent evolutions in the system variables) while also gracefully including hydrodynamic and PTO nonlinearities as well as a natural extension to WEC arrays. Model reduction, to mold the system model into a control-friendly form, is also a feature of this framework.

Keyword(s): energy-maximizing control, model reduction, moments, wave energy, wave energy arrays
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2024-07-10
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/content/journals/10.1146/annurev-control-070523-115155
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A Control Framework for Ocean Wave Energy Conversion Systems: The Potential of Moments
Annual Review of Control, Robotics, and Autonomous Systems 7, 227 (2024); https://doi.org/10.1146/annurev-control-070523-115155
/content/journals/10.1146/annurev-control-070523-115155
/content/journals/10.1146/annurev-control-070523-115155
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