Receding-Horizon Energy-Maximising Optimal Control of Wave Energy Systems Based on Moments
| Autor: | Nicolás Faedo, Yerai Peña-Sanchez, John V. Ringwood |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
0209 industrial biotechnology
010505 oceanography Renewable Energy Sustainability and the Environment Computation Horizon Phase (waves) 02 engineering and technology Optimal control 01 natural sciences Moment (mathematics) 020901 industrial engineering & automation Applied mathematics Absorption (logic) Sensitivity (control systems) Energy (signal processing) 0105 earth and related environmental sciences Mathematics |
| Zdroj: | IEEE Transactions on Sustainable Energy. 12:378-386 |
| ISSN: | 1949-3037 1949-3029 |
| DOI: | 10.1109/tste.2020.3000013 |
| Popis: | In this study, we address the issue of real-time energy-maximising control for wave energy converters (WECs), by proposing a receding-horizon optimal control framework based on the concept of a moment . This approach is achieved by extending the so-called moment-based framework, recently published in the WEC literature, to effectively solve the associated optimal control problem within a finite time-horizon, allowing for real-time performance, and a straightforward inclusion of the wave excitation force $\mathcal {F}_e$ estimation and forecasting requirements, which are intrinsic to the wave energy control application. We present a case study, based on a CorPower-like device, subject to both state and input constraints. We show that the proposed strategy can perform almost identically to the ideal performance case, where full knowledge of $\mathcal {F}_e$ over the time-horizon is assumed available. Moreover, a sensitivity analysis is provided, addressing the impact of wave excitation force estimation and forecasting errors in the computation of the moment-based control input. Two main conclusions can be drawn from this analysis: Forecasting mismatch has a negligible impact on the overall performance of the strategy, while potential differences arising from estimating $\mathcal {F}_e$ , in particular, phase errors, can substantially impact total energy absorption. |
| Databáze: | OpenAIRE |
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