Modeling Innovative Power Take-Off Based on Double-Acting Hydraulic Cylinders Array for Wave Energy Conversion

Juan Carlos Antolín-Urbaneja, Alain Cortés, Itziar Cabanes, Patxi Estensoro, Joseba Lasa and Marga Marcos
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Juan Carlos Antolín-Urbaneja: Energy Unit, Tecnalia, Mikeletegi Pasealekua 2-Miramon Donostia-San Sebastián, Gipuzkoa E-20009, Spain
Alain Cortés: Energy Unit, Tecnalia, Mikeletegi Pasealekua 2-Miramon Donostia-San Sebastián, Gipuzkoa E-20009, Spain
Itziar Cabanes: Automatic Control and Systems Engineering Department, School of Engineering, University of the Basque Country, Alameda Urquijo Bilbao, Bizkaia E-48013, Spain
Patxi Estensoro: Energy Unit, Tecnalia, Mikeletegi Pasealekua 2-Miramon Donostia-San Sebastián, Gipuzkoa E-20009, Spain
Joseba Lasa: Energy Unit, Tecnalia, Mikeletegi Pasealekua 2-Miramon Donostia-San Sebastián, Gipuzkoa E-20009, Spain
Marga Marcos: Automatic Control and Systems Engineering Department, School of Engineering, University of the Basque Country, Alameda Urquijo Bilbao, Bizkaia E-48013, Spain

Energies, 2015, vol. 8, issue 3, 1-38

Abstract: One of the key systems of a Wave Energy Converter for extraction of wave energy is the Power Take-Off (PTO) device. This device transforms the mechanical energy of a moving body into electrical energy. This paper describes the model of an innovative PTO based on independently activated double-acting hydraulic cylinders array. The model has been developed using a simulation tool, based on a port-based approach to model hydraulics systems. The components and subsystems used in the model have been parameterized as real components and their values experimentally obtained from an existing prototype. In fact, the model takes into account most of the hydraulic losses of each component. The simulations show the flexibility to apply different restraining torques to the input movement depending on the geometrical configuration and the hydraulic cylinders on duty, easily modified by a control law. The combination of these two actions allows suitable flexibility to adapt the device to different sea states whilst optimizing the energy extraction. The model has been validated using a real test bench showing good correlations between simulation and experimental tests.

Keywords: hydraulic power take-off; PTO; PTO Model; wave energy conversion; WEC; PTO simulation (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2015
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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