Discrete displacement hydraulic power take-off system for the wavestar wave energy converter

RH Hansen, MM Kramer, E Vidal - Energies, 2013 - mdpi.com
The Wavestar Wave Energy Converter (WEC) is a multiple absorber concept, consisting of
20 hemisphere shaped floats attached to a single platform. The heart of the Wavestar WEC …

Compensation of a hybrid platform dynamics using wave energy converters in different sea state conditions

JF Gaspar, M Kamarlouei, F Thiebaut, CG Soares - Renewable Energy, 2021 - Elsevier
An hybrid floating platform concept, combining a wind turbine with wave energy converter
devices, has been proposed. This paper conducts a further exploration of these synergies …

Power take-off concept for wave energy converters based on oil-hydraulic transformer units

JF Gaspar, M Calvário, M Kamarlouei, CG Soares - Renewable Energy, 2016 - Elsevier
A generic oil-hydraulic based power take-off concept applicable to different Wave Energy
Converters is presented. This power take-off is developed to have well-adapted …

RANS-VOF modelling of the wavestar point absorber

EJ Ransley, DM Greaves, A Raby, D Simmonds… - Renewable Energy, 2017 - Elsevier
Numerical modelling has become commonplace in the development of offshore structures,
however for dynamic systems such as Wave Energy Convertors (WECs) conventional …

Effect of non-ideal power take-off on the energy absorption of a reactively controlled one degree of freedom wave energy converter

R Genest, F Bonnefoy, AH Clément, A Babarit - Applied Ocean Research, 2014 - Elsevier
In this paper, the effect of non-ideal actuators on the performance of reactive control for a
heaving wave energy converter is studied. The concept of the control is to cancel all or part …

Design and control of the powertake-off system for a wave energy converter with multiple absorbers

RH Hansen - 2013 - vbn.aau.dk
Abstract Most active Wave Energy Converter (WEC) concepts are based on harvesting
energy from ocean waves by placing buoyant bodies in the sea. As the bodies are forced to …

Speed control of oil-hydraulic power take-off system for oscillating body type wave energy converters

JF Gaspar, M Kamarlouei, A Sinha, H Xu, M Calvário… - Renewable Energy, 2016 - Elsevier
The variable displacement oil-hydraulic pumps for the Power Take-Off (PTO) of wave energy
converters must work above 80% of maximum displacement in order to have an overall …

Effect of non-ideal power take-off efficiency on performance of single-and two-body reactively controlled wave energy converters

AFO Falcão, JCC Henriques - Journal of Ocean Engineering and Marine …, 2015 - Springer
The highest efficiency of wave energy capture by point absorbers is attained under
conditions close to resonance. In most cases, the natural frequency of resonance is higher …

Design tradeoffs of an oil-hydraulic power take-off for wave energy converters

JF Gaspar, M Calvário, M Kamarlouei, CG Soares - Renewable energy, 2018 - Elsevier
This paper presents the main design tradeoffs that should be handled when developing oil-
hydraulic Power Take-Off devices aiming at the maximization of energy extraction from …

Characterization of loads on a hemispherical point absorber wave energy converter

MM Jakobsen, S Beatty, G Iglesias… - International Journal of …, 2016 - Elsevier
Large-scale experiments were carried out using a hemispherical shaped point absorber with
a diameter of one meter, equivalent to scale 1: 5 of the Wavestar North Sea prototype. The …