Maximum energy capture strategy for dual-port wave energy converters based on model predictive control

Conventional single-port direct-drive wave energy converters (SPDDWEC) cause waves in the emitted power because the generator speed keeps varying during the generation process, and to solve this problem, dual-port direct-drive wave energy converters (DPDDWEC) has been proposed. In this paper, a control strategy for maximum energy capture for a DPDDWEC system is proposed so that the DPDDWEC capture strategy captures the maximum energy from the waves while keeping the emitted power as smooth as possible. Firstly, the mathematical model of the DPDDWEC is introduced in the paper, and then the MPC method is used to find the conditions of maximum energy capture and power smoothness, and the particle swarm algorithm is used to find the optimal generator output for the coupling problem when solving the power. Finally, the correctness of the method is verified using simulation.