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