This work plan describes a project targeted at developing the next generation of wave energy converter (WEC) power take-off (PTO) systems by employing a “co-design” approach, in which predictionless WEC control is used to provide a framework for tuning system dynamics to minimize LCOE. This three year project will deliver dramatic reductions in LCOE by developing methods for co-design design of the full WEC system, which includes hydrodynamics, PTO, and control.
WECs are unique from other existing energy generation technologies. Instead of converting relatively steady input mechanical energy that fluctuates about some mean (e.g., wind, nuclear, hydroelectric), WECs must absorb a purely oscillatory energy input. This unique quality necessitates the usage of advanced control to maximize energy generation and minimize levelized cost of energy (LCOE). Control strategies can be used to shape the dynamic response of a WEC to achieve resonance and increase energy absorption by as much as 200% (see, e.g., [1-3]). However, WECs comprise complex hydrodynamic, mechanical, electrical, and sometimes hydraulic subsystems, all of which must be properly designed to be capable of accurately implementing a control strategy in order to reap the benefits of advanced control. Additionally, energy absorption does not necessarily equate with energy generation.
