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Wave energy is a broadly accessible renewable energy source, but principallyit is not unexploited still and fully developed. Wave energy technologies needmore investigations to reach commercial developments. In this paper, an arrayof interacting wave energy converters (WECs) with various arrangements andlayout size is considered. The WEC model is a symmetrical, spherical and fullysubmerged buoy with three tethers. A frequency-domain model is derived by usinglinear potential theory. Numerical simulations and parametric examinations aredesigned in order to evaluate the distance influence among buoys with apre-defined arrangement on the total power output of the array, based on theirregular wave models. With regard to validating the best-found layout, weperform a landscape analysis experiment using a grid search technique. Theseexperiments are evaluated in four real wave scenarios from south of Australia.Experiments show that the distance between WECs and also the relative angle ofthe layout to significant wave direction plays a pivotal role to harness morepower from the incident waves. Furthermore, we observe that increasing thenumber of WEC in the layout leads to a rise in the optimal distance among WECs.The maximum power of an array produced by a 5 buoy layout arrangement with 185$m$ distance among buoys in the Tasmania wave scenario with a relative angle of63 degrees to the significant in-site wave direction.

Performance investigation on the different wave energy converters layouts in real wave scenarios