Feedback Resonating Control for a Wave Energy Converter

Through the use of advanced control techniques, wave energy converters (WECs) can achieve substantial increases in energy absorption. The motion of the WEC device is a significant contribution to the energy absorbed by the device. Reactive (complex conjugate) control maximizes the energy absorption...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on industry applications 2020-03, Vol.56 (2), p.1862-1868
Main Authors: Bacelli, Giorgio, Nevarez, Victor, G. Coe, Ryan, G. Wilson, David
Format: Article
Language:English
Subjects:
Absorption
Conjugates
Control systems
Controllers
Converters
Energy absorption
energy conversion
Energy conversion efficiency
Force
Frequencies
identifi-cation
Impedance
Impedance matching
Iron
Mathematical model
Ocean waves
Power efficiency
resonance
System identification
TIDAL AND WAVE POWER
Transfer functions
Wave power
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Through the use of advanced control techniques, wave energy converters (WECs) can achieve substantial increases in energy absorption. The motion of the WEC device is a significant contribution to the energy absorbed by the device. Reactive (complex conjugate) control maximizes the energy absorption due to the impedance matching. The issue with complex conjugate control is that, in general, the controller is noncausal, which requires prediction of the incoming waves. This article explores the potential of employing system identification techniques to build a causal transfer function that approximates the complex conjugate controller over a finite frequency band of interest. This approach is quite viable given the band-limited nature of ocean waves. The resulting controller is stable, and the average efficiency of the power captured by the causal controller in realistic ocean waves is 99\%, when compared to the noncausal complex conjugate.
ISSN:0093-9994
1939-9367
DOI:10.1109/TIA.2019.2958018