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...

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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
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cited_by cdi_FETCH-LOGICAL-c360t-1f703315ccd5f97f0beba71aea834fe4dd9ca18cffcc94c693fea3e8ec60a7613
cites cdi_FETCH-LOGICAL-c360t-1f703315ccd5f97f0beba71aea834fe4dd9ca18cffcc94c693fea3e8ec60a7613
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container_title IEEE transactions on industry applications
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creator Bacelli, Giorgio
Nevarez, Victor
G. Coe, Ryan
G. Wilson, David
description 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.
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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
title Feedback Resonating Control for a Wave Energy Converter
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