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Optimizing the hydraulic power take-off system in a wave energy converter

Zeinali, Shokoufa LU ; Wiktorsson, Magnus LU orcid ; Forsberg, Jan ; Lindgren, Georg LU orcid and Lindström, Johan LU orcid (2024) In Ocean Engineering 310.
Abstract

This study aims to determine the optimal pressure for the accumulator tank in a wave energy converter (WEC) with hydraulic power take-off (PTO) to maximize energy generation. A simulation-based approach was employed to analyze the buoy's performance with wave data generated from the Wafo toolbox using the generalized Pierson–Moskowitz (GPM) spectrum. These data were then fed into a Simulink model of the WEC system. Using output from the Simulink model, concave regression was applied to model the relationship between tank pressure and power output. Subsequently, a regression analysis was performed to model the optimal pressure as a function of wave steepness. The findings indicate a strong dependency of optimal pressure on wave... (More)

This study aims to determine the optimal pressure for the accumulator tank in a wave energy converter (WEC) with hydraulic power take-off (PTO) to maximize energy generation. A simulation-based approach was employed to analyze the buoy's performance with wave data generated from the Wafo toolbox using the generalized Pierson–Moskowitz (GPM) spectrum. These data were then fed into a Simulink model of the WEC system. Using output from the Simulink model, concave regression was applied to model the relationship between tank pressure and power output. Subsequently, a regression analysis was performed to model the optimal pressure as a function of wave steepness. The findings indicate a strong dependency of optimal pressure on wave steepness, suggesting that adjusting the accumulator tank pressure according to wave conditions can significantly enhance the WEC's energy output. This research contributes to the ongoing efforts to improve the efficiency of WECs and provides valuable insights for developing adaptive control strategies in WEC systems.

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author
; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Bretschneider spectrum, Concave regression, Semi-parametric bootstrap, Simulation study, Uncertainty analysis, Wave steepness
in
Ocean Engineering
volume
310
article number
118636
publisher
Elsevier
external identifiers
  • scopus:85198320792
ISSN
0029-8018
DOI
10.1016/j.oceaneng.2024.118636
language
English
LU publication?
yes
id
52d8fe5c-0af3-4d5a-be6f-36105449209b
date added to LUP
2024-09-03 15:26:51
date last changed
2025-04-04 14:51:27
@article{52d8fe5c-0af3-4d5a-be6f-36105449209b,
  abstract     = {{<p>This study aims to determine the optimal pressure for the accumulator tank in a wave energy converter (WEC) with hydraulic power take-off (PTO) to maximize energy generation. A simulation-based approach was employed to analyze the buoy's performance with wave data generated from the Wafo toolbox using the generalized Pierson–Moskowitz (GPM) spectrum. These data were then fed into a Simulink model of the WEC system. Using output from the Simulink model, concave regression was applied to model the relationship between tank pressure and power output. Subsequently, a regression analysis was performed to model the optimal pressure as a function of wave steepness. The findings indicate a strong dependency of optimal pressure on wave steepness, suggesting that adjusting the accumulator tank pressure according to wave conditions can significantly enhance the WEC's energy output. This research contributes to the ongoing efforts to improve the efficiency of WECs and provides valuable insights for developing adaptive control strategies in WEC systems.</p>}},
  author       = {{Zeinali, Shokoufa and Wiktorsson, Magnus and Forsberg, Jan and Lindgren, Georg and Lindström, Johan}},
  issn         = {{0029-8018}},
  keywords     = {{Bretschneider spectrum; Concave regression; Semi-parametric bootstrap; Simulation study; Uncertainty analysis; Wave steepness}},
  language     = {{eng}},
  month        = {{10}},
  publisher    = {{Elsevier}},
  series       = {{Ocean Engineering}},
  title        = {{Optimizing the hydraulic power take-off system in a wave energy converter}},
  url          = {{http://dx.doi.org/10.1016/j.oceaneng.2024.118636}},
  doi          = {{10.1016/j.oceaneng.2024.118636}},
  volume       = {{310}},
  year         = {{2024}},
}