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Comprehensive sensitivity analysis and multi-objective optimization on a permanent magnet linear generator for wave energy conversion

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  • Liu, Chunyuan
  • Dong, Rui
  • Ye, Bao-lin

Abstract

With the situation of global energy crisis and environment pollution, it is imperative to develop and utilize renewable energy such as wave energy. In this paper, a permanent magnet linear generator (PMLG) with 9 poles 10 slots is optimized and the direct-drive wave power generation with PMLG as the energy conversion mechanism directly converts the wave energy into electric energy. First, the structure of PMLG was proposed and the mathematical equation of detent force was deduced. The main parameters which related to the detent force and power density were analyzed. Then, parameters were classified into strong-sensitivity and non-sensitivity parameters based on the value of sensitivity SC and FEM-IPSO method was applied to optimize sensitive parameters. The simulation results show that the detent force is decreased 80.33%, and the maximum output power reaches 803.8 W which is higher than the initial design. Finally, A PMLG prototype was manufactured, and the detent force and Induced Electromotive Force (EMF) are measured, the results show that the optimization method is correctness. The oceanic test indicate that wave energy is efficiently converted into electrical energy through the direct-drive wave power take-off system, and the practicability and effectiveness of the scheme are illustrated by experiments.

Suggested Citation

  • Liu, Chunyuan & Dong, Rui & Ye, Bao-lin, 2022. "Comprehensive sensitivity analysis and multi-objective optimization on a permanent magnet linear generator for wave energy conversion," Renewable Energy, Elsevier, vol. 198(C), pages 841-850.
    • Handle: RePEc:eee:renene:v:198:y:2022:i:c:p:841-850
    DOI: 10.1016/j.renene.2022.08.102
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    References listed on IDEAS

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    1. Elwood, David & Yim, Solomon C. & Prudell, Joe & Stillinger, Chad & von Jouanne, Annette & Brekken, Ted & Brown, Adam & Paasch, Robert, 2010. "Design, construction, and ocean testing of a taut-moored dual-body wave energy converter with a linear generator power take-off," Renewable Energy, Elsevier, vol. 35(2), pages 348-354.
    2. Das, Tapas K. & Kumar, Kumud & Samad, Abdus, 2020. "Experimental Analysis of a Biplane Wells Turbine under Different Load Conditions," Energy, Elsevier, vol. 206(C).
    3. Henderson, Ross, 2006. "Design, simulation, and testing of a novel hydraulic power take-off system for the Pelamis wave energy converter," Renewable Energy, Elsevier, vol. 31(2), pages 271-283.
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    1. Li, Jian & Zuo, Zhengxing & Jia, Boru & Feng, Huihua & Mei, Bingang & Smallbone, Andrew & Roskilly, Anthony Paul, 2024. "Operating characteristics and design parameter optimization of permanent magnet linear generator applied to free-piston energy converter," Energy, Elsevier, vol. 287(C).

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