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Model Predictive Energy-Maximising Tracking Control for a Wavestar-Prototype Wave Energy Converter

Li, Doudou; Patton, Ron

Authors

Doudou Li



Abstract

To date, one of the main challenges in the wave energy field is to achieve energy-maximizing control in order to reduce the levelized cost of energy (LCOE). This paper presents a model predictive velocity tracking control method based on a hierarchical structure for a Wavestar-like deivce in the WEC-SIM benchmark. The first part of the system structure aims to estimate the wave excitation moment (WEM) by using a Kalman filter. Then, an extended Kalman filter (EKF) is chosen to obtain the amplitude and angular frequency of the WEM in order to compute the reference velocity. Following this, a low-level model predictive control (MPC) method is designed to ensure the wave energy converter (WEC) tracks the optimal reference velocity for maximum energy extraction from irregular waves. Two Gaussian Process (GP) models are considered to predict the future wave excitation moment and future reference velocity, which are needed in MPC design. The proposed strategy can give a new vision for energy-maximizing tracking control based on MPC.

Citation

Li, D., & Patton, R. (2023). Model Predictive Energy-Maximising Tracking Control for a Wavestar-Prototype Wave Energy Converter. Journal of Marine Science and Engineering, 11(7), Article 1289. https://doi.org/10.3390/jmse11071289

Journal Article Type Article
Acceptance Date Jun 20, 2023
Online Publication Date Jun 25, 2023
Publication Date Jul 1, 2023
Deposit Date Jul 10, 2023
Publicly Available Date Jul 11, 2023
Journal Journal of Marine Science and Engineering
Electronic ISSN 2077-1312
Publisher MDPI
Peer Reviewed Peer Reviewed
Volume 11
Issue 7
Article Number 1289
DOI https://doi.org/10.3390/jmse11071289
Keywords Kalman filter; Extended Kalman filter; Gaussian Process (GP) model; Velocity tracking; Model predictive control
Public URL https://hull-repository.worktribe.com/output/4331028

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