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

Preview

Download (1MB) | Preview

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:	http://www.mdpi.com/journal/jmse
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

Repository Staff Only(login required)

Item control page

Downloads

Origin of downloads