Optimisation of wave energy extraction with the Archimedes Wave Swing |
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| Authors: | Duarte Valrio Pedro Beiro Jos S da Costa |
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| Institution: | aIDMEC/IST, TULisbon, Av. Rovisco Pais, 1, 1049-001 Lisboa, Portugal;bDepartment of Mechanical Engineering, Instituto Superior de Engenharia de Coimbra, R. Pedro Nunes, 3030-199 Coimbra, Portugal |
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| Abstract: | This paper addresses the Archimedes Wave Swing (an offshore wave energy converter, which produces electricity from sea waves). It compares the performances of latching control (a discrete, highly non-linear, intrinsically sub-optimum control strategy), of reactive control, of phase and amplitude control (two optimum control strategies that involve non-causal transfer functions, which have to be implemented with approximations, thus rending the control sub-optimum), and of feedback linearisation control (a non-linear control strategy). From extensive simulations it is concluded that the latter performs clearly better irrespective of the sea state, and leads to a significant increase of absorbed wave power. |
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| Keywords: | Wave energy Renewable energy Archimedes Wave Swing Reactive control Phase and amplitude control Latching control Feedback linearisation control |
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