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Wave power absorption: Experiments in open sea and simulation

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5 Author(s)
Eriksson, M. ; Swedish Centre for Renewable Electric Energy Conversion, Division for Electricity and Lightning Research, Department of Engineering Sciences, The Ångström Laboratory, Uppsala University, P.O. Box 534, 75121 Uppsala, Sweden ; Waters, R. ; Svensson, O. ; Isberg, J.
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A full scale prototype of a wave power plant based on a direct drive linear generator driven by a point absorber has been installed at the west coast of Sweden. In this paper, experimentally collected data of energy absorption for different electrical loads are used to verify a model of the wave power plant including the interactions of wave, buoy, generator, and external load circuit. The wave-buoy interaction is modeled with linear potential wave theory. The generator is modeled as a nonlinear mechanical damping function that is dependent on piston velocity and electric load. The results show good agreement between experiments and simulations. Potential wave theory is well suited for the modeling of a point absorber in normal operation and for the design of future converters. Moreover, the simulations are fast, which opens up for simulations of wave farms.

Published in:

Journal of Applied Physics  (Volume:102 ,  Issue: 8 )