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

Energies

Juan Carlos Antolín-Urbaneja²  Alain Cortés²  Itziar Cabanes¹  Patxi Estensoro²  Joseba Lasa²  Marga Marcos¹ 

[1] Automatic Control and Systems Engineering Department, School of Engineering, University of the Basque Country, Alameda Urquijo Bilbao, Bizkaia E-48013, Spain; E-Mails:;Energy Unit, Tecnalia, Mikeletegi Pasealekua 2-Miramon Donostia-San Sebastián, Gipuzkoa E-20009, Spain; E-Mails:

关键词: hydraulic power take-off;    PTO;    PTO Model;    wave energy conversion;    WEC;    PTO simulation;   

DOI  :  10.3390/en8032230

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.