Fusco, Francesco and Ringwood, John
A Model for the Sensitivity of
Non-Causal Control of Wave Energy Converters to
Wave Excitation Force Prediction Errors.
Proceedings of the 9th European Wave and Tidal Energy Conference (EWTEC).
Wave Energy Converters (WECs) consisting of oscillating
bodies can gain significant benefit from a real-time
controller that is able to appropriately tune the system operation
to the incident wave, thus allowing for a higher energy capture
in a wider variety of wave conditions. Some of the proposed
controllers, however, are non-causal and need predictions of the
excitation force to be implemented in practise. A frequencydomain
model is proposed, for the estimation of the effects that
the wave- excitation-force prediction error has on the reference
velocity that is calculated from the non-causal control law and,
ultimately, on the absorbed power. The model can easily be
derived exclusively from the predictor and from the non-causal
law, with no additional information about the excitation force.
Such a frequency-domain model can be valuable for the design
of a robust control architecture, where the prediction error
has a limited effect on the performance (power absorption).
Focus is put on reactive control, but it is shown how the
proposed sensitivity model can be generalised to other non-causal
strategies, such as model predictive control.
||wave energy converter; control; wave forecasting;
||Science & Engineering > Electronic Engineering
Professor John Ringwood
||30 Mar 2012 09:38
|Journal or Publication Title:
||Proceedings of the 9th European Wave and Tidal Energy Conference (EWTEC)
||School of Civil Engineering and the Environment, University of Southampton
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