Control of a point absorber wave energy converter

Ahmed Jabrali, Rabha Khatyr, Jaafar Khalid Naciri

Abstract


This paper deals with the optimization of a bottom fixed wave energy converter of heaving point absorber type (PAWEC). The PAWEC consists of a unique horizontal cylinder of radius R and length L, connected to the seabed through an extensible Power Take Off device. In this work, an original control strategy is used in order to optimize the PAWEC. The proposed method links the damping coefficient of the power take off device to the relative velocity between the buoy and the wave. This study focus on the comparison of the two cases where a passive control is adopted and where the damping coefficient is a constant. The performance of the WEC in different wave conditions for each of the two cases is investigated. The results show that the recovered energy is considerably increased owing to the adaptation of the damping coefficient with the buoy speed

Keywords


Wave energy converters; heaving point absorber; passive control; evolutionary algorithm; WEC performance; Morison’s force

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DOI (PDF): https://doi.org/10.20508/ijrer.v9i2.9374.g7676

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