Bacelli, Giorgio and Gilloteaux, Jean-Christophe and Ringwood, John (2008) State space model of a hydraulic power take off unit for wave energy conversion employing bondgraphs. In: 10th World Renewable Energy Congress - WRECX. WREC, Brighton, pp. 1-4. ISBN 9780080568973

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Abstract

In this work, the modeling of a Power Take- Off (PTO) unit for a point absorber wave energy converter is described. The PTO influences the energy conversion performance by its efficiency and by the damping force exerted, which affects the motion of the body. The state space model presented gives a description of the damping force and of the internal dynamics of the PTO. The aim of this work is to develop a model for the PTO as a part of a complete wave-to-wire model of a wave energy converter as in Figure 1, used for the design control techniques. Figure 1: Wave-to-wire model structure A bondgraph is employed to model the physical system that provides transparent and methodical means of formulating state space equations and of visualizing energy transfer throughout the system. Bondgraphs have already been shown to be a very useful tool for the modeling of PTO for wave energy converters (2). The dynamic of the mathematical model is then analyzed respect to the variation of parameters; in particular, the non-linear system obtained is linearized and its eigenvalues are calculated as function of the accumulator size and pre-charge pressure

Item Type:	Book Section
Additional Information:	Proceedings of the 10th World Renewable Energy Congress - WREC X : 19 - 25th July, 2008, Scottish Exhibition and Conference Centre, Glasgow, Scotland. Published in CDROM format.
Keywords:	State space model; hydraulic power take off unit; wave energy conversion; bondgraphs;
Academic Unit:	Faculty of Science and Engineering > Electronic Engineering Faculty of Science and Engineering > Research Institutes > Centre for Ocean Energy Research
Item ID:	4419
Depositing User:	Professor John Ringwood
Date Deposited:	16 Jul 2013 15:51
Publisher:	WREC
Refereed:	Yes
URI:
Use Licence:	This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here

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