The latest model (scaled at 1:18), was tested at Ifremer deep water basin in Brest, France, under the MaRINET EU incentive for renewable technology trials. This model was already fully functional with a built-in original PTO system and a full electrical system with various control options and full monitoring (electrical parameters, including power output, forces in tendons and the PTO system, movement of the device). During the trials, the model was already returning some of the generated power back to the public electric grid. This device transformed 45 % of available wave energy into electrical energy.
The model, tested in France(1:18), and some of the recorded outputs: wave ζw , float heave ζb , spar surge ξs, generator rating nG, generator torque MG, tension forces in tendons Q1,2 and force in the toothed rack Ft (Brest, France, February 2014).
A typical transfer function of the float heave (top left), a typical transfer function of the spar surge (bottom left) and typical captured power captured as curves as functions of the generator loading.