Optimization of the wave energy absorption in oscillating-body systems using extremum seeking approach

In this work, we consider the optimization problem of ocean wave energy absorption in oscillating-body systems. A solution based on discrete-time extremum seeking control is proposed to improve the mean extracted power by a power take-off (PTO) mechanism under different wave climates. Two different PTO mechanisms are considered: a linear and a non-linear one. Simulation results, obtained from an oscillating-body system subject to incident regular and irregular waves, are presented to show the feasibility of the proposed scheme.

[1]  I. Queinnec,et al.  MPPT of photovoltaic systems using extremum - seeking control , 2006, IEEE Transactions on Aerospace and Electronic Systems.

[2]  Torgeir Moan,et al.  A Comparison of Selected Strategies for Adaptive Control of Wave Energy Converters , 2011 .

[3]  Miroslav Krstic,et al.  Real-Time Optimization by Extremum-Seeking Control: Ariyur/Extremum Seeking , 2004 .

[4]  Segen F. Estefen,et al.  Experimental and Numerical Studies of the Wave Energy Hyberbaric Device for Electricity Production , 2008 .

[5]  António F.O. Falcão,et al.  Phase control through load control of oscillating-body wave energy converters with hydraulic PTO system , 2008 .

[6]  M. Krstic,et al.  PID tuning using extremum seeking: online, model-free performance optimization , 2006, IEEE Control Systems.

[7]  Thor I. Fossen,et al.  Practical aspects of frequency-domain identification of dynamic models of marine structures from hydrodynamic data , 2011 .

[8]  J. Falnes,et al.  STATE-SPACE MODELLING OF A VERTICAL CYLINDER IN HEAVE , 1995 .

[9]  Scott J. Moura,et al.  Air flow control in fuel cell systems: An extremum seeking approach , 2009, 2009 American Control Conference.

[10]  Paula B. Garcia-Rosa,et al.  Phase control strategy for a wave energy hyperbaric converter , 2010 .

[11]  António F.O. Falcão,et al.  Wave energy utilization: A review of the technologies , 2010 .

[12]  Kartik B. Ariyur,et al.  Real-Time Optimization by Extremum-Seeking Control , 2003 .

[13]  Milos S. Stankovic,et al.  Extremum seeking under stochastic noise and applications to mobile sensors , 2010, Autom..

[14]  J. Falnes.  Ocean Waves and Oscillating Systems , 2002 .

[15]  A. Clément,et al.  Optimal Latching Control of a Wave Energy Device in Regular and Irregular Waves , 2006 .

[16]  Paula B. Garcia-Rosa,et al.  Efficiency optimization in a wave energy hyperbaric converter , 2009, 2009 International Conference on Clean Electrical Power.

[17]  Torgeir Moan,et al.  Experimental and numerical investigation of non-predictive phase-control strategies for a point-absorbing wave energy converter , 2009 .

[18]  Stephen P. Boyd,et al.  Convex Optimization , 2004, Algorithms and Theory of Computation Handbook.

[19]  Andreas Antoniou,et al.  Practical Optimization: Algorithms and Engineering Applications , 2007, Texts in Computer Science.

[20]  Jin Soo Lee,et al.  Extremum seeking control for discrete-time systems , 2002, IEEE Trans. Autom. Control..

[21]  H. Miyamoto,et al.  Output maximization control of wind turbine based on extremum control strategy , 2001, Proceedings of the 2001 American Control Conference. (Cat. No.01CH37148).

[22]  Aurélien Babarit,et al.  Optimizing the Power Take Off of a Wave Energy Converter With Regard to the Wave Climate , 2006 .

[23]  E Tedeschi,et al.  Wave-to-wave buoys control for improved power extraction under electro-mechanical constraints , 2010, 2010 IEEE International Conference on Sustainable Energy Technologies (ICSET).

[24]  Johannes Falnes,et al.  A REVIEW OF WAVE-ENERGY EXTRACTION , 2007 .

[25]  J. Labeyrie,et al.  Stationary and transient states of random seas , 1990 .

[26]  W. Cummins.  THE IMPULSE RESPONSE FUNCTION AND SHIP MOTIONS , 2010 .

[27]  W. E. Cummins,et al.  The Impulse Response Function and Ship Motion , 1962 .