Modelling and Control of the Wavestar Prototype

Rico Hjerm Hansen; Morten M.  Kramer

Modelling and Control of the Wavestar Prototype

Rico Hjerm Hansen, Morten M. Kramer

AAU Energy

Research output: Contribution to book/anthology/report/conference proceeding › Article in proceeding › Research › peer-review

Abstract

In the field of wave energy it is well known that control of point absorbers is essential in order to increase energy capture from waves. Correspondingly, advanced control is an integrated part of the Wavestar design. This paper presents the control method, referred to as the Wave Power Extraction Algorithm (WPEA), applied to the full-scale Wavestar Prototype for maximizing energy extraction. The WPEA is optimized based on simulations of the point absorbers in different sea states. Hence, a presentation of a hydrodynamic model of the Wavestar is included in the paper. A simplified Power Take-Off (PTO) is also added to the model, enabling the optimization of the WPEA to take into account the PTO constraints of PTO bandwidth and force limitations. The predicted results of the optimized WPEA are compared to real measurements from theWavestar Prototype, showing good compliance.

Original language	English
Title of host publication	Proceedings of the 9th European Wave and Tidal Energy Conference, EWTEC 2011
Editors	AbuBakr S. Bahaj
Number of pages	10
Publisher	University of Southampton
Publication date	2011
Publication status	Published - 2011
Event	The 9th European Wave and Tidal Energy Conference : EWTEC 2011 - Southampton, United Kingdom Duration: 5 Sept 2011 → 9 Sept 2011

Conference

Conference	The 9th European Wave and Tidal Energy Conference : EWTEC 2011
Country/Territory	United Kingdom
City	Southampton
Period	05/09/2011 → 09/09/2011

Bibliographical note

Published on a cd.

Keywords

Wavestar Prototype
Modelling
WPEA
Reactive Control
Hydrodynamics
Optimal Control

AUB Link

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SDWED: Structural design of wave energy devices (SDWED)
Kofoed, J. P., Frigaard, P., Sørensen, J. D., Pedersen, J. K., Lu, K., Sørensen, J. T., Bingham, H., Ferreira, C. B., Zanuttigh, B., Estefan, S. F., Nielsen, K., Brito-Melo, A., Sterndorff, M., Ingram, D. & Bard, J.
01/01/2010 → 31/12/2014
Project: Research

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Cite this

@inproceedings{45fd3b8d401a4347a5865c5d171e0a15,

title = "Modelling and Control of the Wavestar Prototype",

abstract = "In the field of wave energy it is well known that control of point absorbers is essential in order to increase energy capture from waves. Correspondingly, advanced control is an integrated part of the Wavestar design. This paper presents the control method, referred to as the Wave Power Extraction Algorithm (WPEA), applied to the full-scale Wavestar Prototype for maximizing energy extraction. The WPEA is optimized based on simulations of the point absorbers in different sea states. Hence, a presentation of a hydrodynamic model of the Wavestar is included in the paper. A simplified Power Take-Off (PTO) is also added to the model, enabling the optimization of the WPEA to take into account the PTO constraints of PTO bandwidth and force limitations. The predicted results of the optimized WPEA are compared to real measurements from theWavestar Prototype, showing good compliance.",

keywords = "Wavestar Prototype, Modelling, WPEA, Reactive Control, Hydrodynamics, Optimal Control, Wavestar Prototype, Modelling, WPEA, Reactive Control, Hydrodynamics, Optimal Control",

author = "Hansen, {Rico Hjerm} and Kramer, {Morten M.}",

note = "Published on a cd.; The 9th European Wave and Tidal Energy Conference : EWTEC 2011 ; Conference date: 05-09-2011 Through 09-09-2011",

year = "2011",

language = "English",

editor = "Bahaj, {AbuBakr S.}",

booktitle = "Proceedings of the 9th European Wave and Tidal Energy Conference, EWTEC 2011",

publisher = "University of Southampton",

}

TY - GEN

T1 - Modelling and Control of the Wavestar Prototype

AU - Hansen, Rico Hjerm

AU - Kramer, Morten M.

N1 - Published on a cd.

PY - 2011

Y1 - 2011

N2 - In the field of wave energy it is well known that control of point absorbers is essential in order to increase energy capture from waves. Correspondingly, advanced control is an integrated part of the Wavestar design. This paper presents the control method, referred to as the Wave Power Extraction Algorithm (WPEA), applied to the full-scale Wavestar Prototype for maximizing energy extraction. The WPEA is optimized based on simulations of the point absorbers in different sea states. Hence, a presentation of a hydrodynamic model of the Wavestar is included in the paper. A simplified Power Take-Off (PTO) is also added to the model, enabling the optimization of the WPEA to take into account the PTO constraints of PTO bandwidth and force limitations. The predicted results of the optimized WPEA are compared to real measurements from theWavestar Prototype, showing good compliance.

AB - In the field of wave energy it is well known that control of point absorbers is essential in order to increase energy capture from waves. Correspondingly, advanced control is an integrated part of the Wavestar design. This paper presents the control method, referred to as the Wave Power Extraction Algorithm (WPEA), applied to the full-scale Wavestar Prototype for maximizing energy extraction. The WPEA is optimized based on simulations of the point absorbers in different sea states. Hence, a presentation of a hydrodynamic model of the Wavestar is included in the paper. A simplified Power Take-Off (PTO) is also added to the model, enabling the optimization of the WPEA to take into account the PTO constraints of PTO bandwidth and force limitations. The predicted results of the optimized WPEA are compared to real measurements from theWavestar Prototype, showing good compliance.

KW - Wavestar Prototype

KW - Modelling

KW - WPEA

KW - Reactive Control

KW - Hydrodynamics

KW - Optimal Control

KW - Wavestar Prototype

KW - Modelling

KW - WPEA

KW - Reactive Control

KW - Hydrodynamics

KW - Optimal Control

M3 - Article in proceeding

BT - Proceedings of the 9th European Wave and Tidal Energy Conference, EWTEC 2011

A2 - Bahaj, AbuBakr S.

PB - University of Southampton

T2 - The 9th European Wave and Tidal Energy Conference : EWTEC 2011

Y2 - 5 September 2011 through 9 September 2011

ER -

Modelling and Control of the Wavestar Prototype

Abstract

Conference

Bibliographical note

Keywords

AUB Link

Fingerprint

Projects

SDWED: Structural design of wave energy devices (SDWED)

Cite this