A Model for the Sensitivity of Non-Causal Control of Wave Energy Converters to Wave Excitation Force Prediction Errors


Fusco, Francesco and Ringwood, John (2011) 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).

[img] Download (407kB)


Share your research

Twitter Facebook LinkedIn GooglePlus Email more...



Add this article to your Mendeley library


Abstract

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.

Item Type: Article
Keywords: wave energy converter; control; wave forecasting;
Academic Unit: Faculty of Science and Engineering > Electronic Engineering
Item ID: 3551
Depositing User: Professor John Ringwood
Date Deposited: 30 Mar 2012 09:38
Journal or Publication Title: Proceedings of the 9th European Wave and Tidal Energy Conference (EWTEC)
Publisher: School of Civil Engineering and the Environment, University of Southampton
Refereed: Yes
URI:

Repository Staff Only(login required)

View Item Item control page

Document Downloads

More statistics for this item...