Active control of a vertical axis pendulum wave energy converter

Modular horizontal pendulum wave energy converter: Exploring feasibility to power ocean observation applications in the U.S. pacific northwest

“…The pendulum-PTO design is straightforward and has been shown to operate well in both small and large sea states [20].…”

“…Basic components and assembly of a HPWEC [20]; pendulum rotates to drive electrical generator a minimum amount of mechanical parts, possibly eliminating the need for gearboxes or complex control techniques [21]. The concept is that rotation of a pendulum attached to a gear-andpinion system drives an electrical generator.…”

“…Many empirical spectra have been developed to characterise sea states. The Bretschneider spectrum was chosen based on the fact that it does not have the hard requirement of needing a fully developed sea and that it is formulated using two parameters, H s and w m (=) giving a more accurate representation of the true sea state as opposed to one parameter spectra [20, 24]. The span of frequencies, w , used to generate the spectrum contain the lowest and highest frequency seen in each season to ensure all observed data from NDBC Station 46041 during 2019 was used in the spectrum calculation.…”

A Novel 2-D Point Absorber Numerical Modelling Method

“…Examples of offshore WECs are illustrated in Figure 1. These WECs can be categorized into two main clusters, earth-reacting and self-reacting, and into two more subgroups, floating at the surface [19][20][21][22][23][24] or fully submerged [25,26]. The mooring component must counteract loads that are equivalent in magnitude and characteristics to the environmental forces acting on the WEC.…”

“…Inventions 2021, 6, x FOR PEER REVIEW 2 surface [19][20][21][22][23][24] or fully submerged [25,26]. The mooring component must counteract lo that are equivalent in magnitude and characteristics to the environmental forces actin the WEC.…”