Control-informed ballast and geometric optimisation of a three-body hinge-barge wave energy converter using two-layer optimisation

RENEWABLE ENERGY

卷:171

Article

Wang, LiGuo¹  Ringwood, John V.^2,3 

[1] Sun Yat Sen Univ, Sch Marine Engn & Technol, Zhuhai 519082, Peoples R China

[2] Natl Univ Ireland Maynooth, Ctr Ocean Energy Res, Maynooth, Kildare, Ireland

[3] Marine & Renewable Energy Ireland, Maynooth, Kildare, Ireland

关键词: Wave energy converter;    Geometric optimisation;    Ballast optimisation;    Hinge barge;    Long-term operation;    Energy-maximisation control;   

DOI  :  10.1016/j.renene.2021.02.125

来源: Elsevier

【 摘 要 】

This paper presents a systematic methodology to optimise the geometry of a three-body hinge-barge wave energy converter, to maximise the energy extraction of the device in given sea states and in site specific wave climates. To that end, a 5-degree-of-freedom mathematical model is proposed to describe the system dynamics in two-dimensional space and a two-layer optimisation is designed to find the optimal design and control variables. The inner-layer optimisation is used to find the optimal control parameters of the power take-off system and the outer-layer optimisation, which uses a genetic algorithm, is employed to find the optimal design parameters of barge lengths and of optimal ballast positioning. In the case study, this methodology is applied to a 1:20 scale prototype of the McCabe Wave Pump device. Numerical results indicate that the optimal dimensions of the device, under given sea states, can be found efficiently and accurately, and that there appears to be no obvious benefit in the use of three barges, over a two-barge system. (c) 2021 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).

【 授权许可】

Free