Energy-maximising moment-based constrained optimal control of ocean wave energy farms
Author(s)
Faedo, N
Scarciotti, Giordano
Astolfi, A
Ringwood, John V
Type
Journal Article
Abstract
Successful commercialisation of wave energy technology inherently incorporates the concept of an array of wave energy converters (WECs). These devices, which constantly interact via hydrodynamic effects, require optimised control that can guarantee maximum energy extraction from incoming ocean waves while ensuring, at the same time, that any physical limitations associated with device and actuator systems are being consistently respected. This paper presents a moment-based energy-maximising optimal control framework for WECs arrays subject to state and input constraints. The authors develop a framework under which the objective function (and system variables) can be mapped to a finite-dimensional tractable quadratic program (QP), which can be efficiently solved using state-of-the-art solvers. Moreover, the authors show that this QP is always concave, i.e. existence and uniqueness of a globally optimal solution is guaranteed under this moment-based framework. The performance of the proposed strategy is demonstrated through a case study, where (state and input constrained) energy-maximisation for a WEC farm composed of CorPower-like WEC devices is considered.
Date Issued
2021-10-26
Date Acceptance
2021-08-05
Citation
IET Renewable Power Generation, 2021, 15 (14), pp.3395-3408
ISSN
1752-1416
Publisher
Wiley
Start Page
3395
End Page
3408
Journal / Book Title
IET Renewable Power Generation
Volume
15
Issue
14
Copyright Statement
© 2021 The Authors. IET Renewable Power Generation published by John Wiley & Sons Ltd on behalf of The Institution of Engineering and Technology. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
License URL
Sponsor
Royal Society
Identifier
10.1049/rpg2.12284
Grant Number
IEC\R1\180018
Subjects
Energy
0906 Electrical and Electronic Engineering
Publication Status
Published
Date Publish Online
2021-09-06