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Optimal hydraulic PTO and linear permanent magnet generator for a floating two-buoy wave energy converter

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Listed:
  • Li, Demin
  • Sharma, Sanjay
  • Wang, Tianyuan
  • Borthwick, Alistair G.L.
  • Dong, Xiaochen
  • Shi, Hongda

Abstract

A fully coupled fluid-structure-power take-off model is used to investigate the optimal energy capture of a floating two-buoy wave energy converter excited by regular waves and irregular waves. The system incorporates hydraulic power take-off and a linear permanent magnet generator. By considering the coupling relationship between the power take-off parameters for regular waves, a power take-off parameter interval is determined for the optimization model. Parametric optimization of the hydraulic power take-off and linear permanent magnet generator systems is proposed, based on response surface methodology in conjunction with central combination design for sensitivity analysis and optimal configuration of different parameters. The methodology efficiently predicts optimal electric efficiency while reducing the requirement for multiple boundary element simulations. It is found that a model with predicted optimal configuration of the hydraulic power take-off system can achieve 10 % more electrical efficiency than that with linear permanent magnet generator. Comparison between the energy capacities of the different systems indicates that a device with linear permanent magnet generator attains higher energy conversion efficiency within a wider power take-off bandwidth. This study provides guidance for the design and selection of efficient power take-off systems for floating two-buoy wave energy converters.

Suggested Citation

  • Li, Demin & Sharma, Sanjay & Wang, Tianyuan & Borthwick, Alistair G.L. & Dong, Xiaochen & Shi, Hongda, 2024. "Optimal hydraulic PTO and linear permanent magnet generator for a floating two-buoy wave energy converter," Renewable Energy, Elsevier, vol. 234(C).
    • Handle: RePEc:eee:renene:v:234:y:2024:i:c:s0960148124012990
    DOI: 10.1016/j.renene.2024.121231
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    References listed on IDEAS

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