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The effects of sea-state on optimal generator parameters for a wave energy converter

Zeinali, Shokoufa LU ; Wiktorsson, Magnus LU orcid ; Lindström, Johan LU orcid ; Lindgren, Georg LU orcid ; Forsberg, Jan ; Shao, X. and Ringsberg, J. W. (2025) 6th International Conference on Renewable Energies Offshore, RENEW 2024 p.551-558
Abstract

The power take-off (PTO) system and control laws for wave energy converters (WECs) are crucial for system performance. Determining optimal PTO parameters based on different sea states is key for formulating control laws, identifying optimal WEC locations, and optimizing wave-to-wire performance. This study focuses on an oscillating water column (OWC) type WEC developed by Waves4Power using a buoy and piston in a water tube to generate hydraulic pressure in an accumulator tank for an electric generator. For 78 different sea states, optimal generator parameters maximizing electrical output are identified using waves simulated from Pierson-Moskowitz (PM) spectra and a Simulink model, including non-linear PTO effects. Results show a strong... (More)

The power take-off (PTO) system and control laws for wave energy converters (WECs) are crucial for system performance. Determining optimal PTO parameters based on different sea states is key for formulating control laws, identifying optimal WEC locations, and optimizing wave-to-wire performance. This study focuses on an oscillating water column (OWC) type WEC developed by Waves4Power using a buoy and piston in a water tube to generate hydraulic pressure in an accumulator tank for an electric generator. For 78 different sea states, optimal generator parameters maximizing electrical output are identified using waves simulated from Pierson-Moskowitz (PM) spectra and a Simulink model, including non-linear PTO effects. Results show a strong dependency between optimal generator speed and sea state, suggesting control laws based on sea state can enhance energy production. Wave steepness is the most important characteristic, hence four representative sea states based on their steepness are used to illustrate results.

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Please use this url to cite or link to this publication:
author
; ; ; ; ; and
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
host publication
Innovations in Renewable Energies Offshore : Proceedings of the 6th International Conference on Renewable Energies Offshore, RENEW 2024 - Proceedings of the 6th International Conference on Renewable Energies Offshore, RENEW 2024
editor
Guedes Soares, Carlos and Wang, Shan
pages
8 pages
publisher
CRC Press/Balkema
conference name
6th International Conference on Renewable Energies Offshore, RENEW 2024
conference location
Lisbon, Portugal
conference dates
2024-11-19 - 2024-11-21
external identifiers
  • scopus:85208530722
ISBN
9781032905570
9781003558859
DOI
10.1201/9781003558859-61
project
Statistical modelling of wave powerplants
language
English
LU publication?
yes
id
44f05f38-778c-4c05-bae4-e46d7dbe9946
date added to LUP
2025-01-27 10:18:28
date last changed
2025-07-16 02:19:15
@inproceedings{44f05f38-778c-4c05-bae4-e46d7dbe9946,
  abstract     = {{<p>The power take-off (PTO) system and control laws for wave energy converters (WECs) are crucial for system performance. Determining optimal PTO parameters based on different sea states is key for formulating control laws, identifying optimal WEC locations, and optimizing wave-to-wire performance. This study focuses on an oscillating water column (OWC) type WEC developed by Waves4Power using a buoy and piston in a water tube to generate hydraulic pressure in an accumulator tank for an electric generator. For 78 different sea states, optimal generator parameters maximizing electrical output are identified using waves simulated from Pierson-Moskowitz (PM) spectra and a Simulink model, including non-linear PTO effects. Results show a strong dependency between optimal generator speed and sea state, suggesting control laws based on sea state can enhance energy production. Wave steepness is the most important characteristic, hence four representative sea states based on their steepness are used to illustrate results.</p>}},
  author       = {{Zeinali, Shokoufa and Wiktorsson, Magnus and Lindström, Johan and Lindgren, Georg and Forsberg, Jan and Shao, X. and Ringsberg, J. W.}},
  booktitle    = {{Innovations in Renewable Energies Offshore : Proceedings of the 6th International Conference on Renewable Energies Offshore, RENEW 2024}},
  editor       = {{Guedes Soares, Carlos and Wang, Shan}},
  isbn         = {{9781032905570}},
  language     = {{eng}},
  pages        = {{551--558}},
  publisher    = {{CRC Press/Balkema}},
  title        = {{The effects of sea-state on optimal generator parameters for a wave energy converter}},
  url          = {{http://dx.doi.org/10.1201/9781003558859-61}},
  doi          = {{10.1201/9781003558859-61}},
  year         = {{2025}},
}