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Damping Studies on PMLG-Based Wave Energy Converter under Oceanic Wave Climates

Author

Listed:
  • Yue Hong

    (College of Mechatronics and Control Engineering, Shenzhen University, Shenzhen 518061, China)

  • Irina Temiz

    (Department of Electrical Engineering, Uppsala University, Box 65, 75103 Uppsala, Sweden)

  • Jianfei Pan

    (College of Mechatronics and Control Engineering, Shenzhen University, Shenzhen 518061, China)

  • Mikael Eriksson

    (Department of Electrical Engineering, Uppsala University, Box 65, 75103 Uppsala, Sweden)

  • Cecilia Boström

    (Department of Electrical Engineering, Uppsala University, Box 65, 75103 Uppsala, Sweden)

Abstract

Wave energy converters (WECs), which are designed to harvest ocean wave energy, have recently been improved by the installation of numerous conversion mechanisms; however, it is still difficult to find an appropriate method that can compromise between strong environmental impact and robust performance by transforming irregular wave energy into stable electrical power. To solve this problem, an investigation into the impact of varied wave conditions on the dynamics of WECs and to determine an optimal factor for WECs to comply with long-term impacts was performed. In this work, we researched the performance of WECs influenced by wave climates. We used a permanent magnet linear generator (PMLG)-based WEC that was invented at Uppsala University. The damping effect was first studied with a PMLG-type WEC. Then, a group of sea states was selected to investigate their impact on the power production of the WEC. Two research sites were chosen to investigate the WEC’s annual energy production as well as a study on the optimal damping coefficient impact. In addition, we compared the WEC’s energy production between optimal damping and constant damping under a full range of sea states at both sites. Our results show that there is an optimal damping coefficient that can achieve the WEC’s maximum power output. For the chosen research sites, only a few optimal damping coefficients were able to contribute over 90% of the WEC’s annual energy production. In light of the comparison between optimal and constant damping, we conclude that, for specific regions, constant damping might be a better choice for WECs to optimize long-term energy production.

Suggested Citation

  • Yue Hong & Irina Temiz & Jianfei Pan & Mikael Eriksson & Cecilia Boström, 2021. "Damping Studies on PMLG-Based Wave Energy Converter under Oceanic Wave Climates," Energies, MDPI, vol. 14(4), pages 1-21, February.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:4:p:920-:d:496614
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    References listed on IDEAS

    as
    1. Yue Hong & Mikael Eriksson & Cecilia Boström & Rafael Waters, 2016. "Impact of Generator Stroke Length on Energy Production for a Direct Drive Wave Energy Converter," Energies, MDPI, vol. 9(9), pages 1-12, September.
    2. Temiz, Irina & Leijon, Jennifer & Ekergård, Boel & Boström, Cecilia, 2018. "Economic aspects of latching control for a wave energy converter with a direct drive linear generator power take-off," Renewable Energy, Elsevier, vol. 128(PA), pages 57-67.
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    5. Waters, Rafael & Engström, Jens & Isberg, Jan & Leijon, Mats, 2009. "Wave climate off the Swedish west coast," Renewable Energy, Elsevier, vol. 34(6), pages 1600-1606.
    6. Rodríguez, Claudio A. & Rosa-Santos, Paulo & Taveira-Pinto, Francisco, 2019. "Assessment of damping coefficients of power take-off systems of wave energy converters: A hybrid approach," Energy, Elsevier, vol. 169(C), pages 1022-1038.
    7. Yue Hong & Mikael Eriksson & Cecilia Boström & Jianfei Pan & Yun Liu & Rafael Waters, 2020. "Damping Effect Coupled with the Internal Translator Mass of Linear Generator-Based Wave Energy Converters," Energies, MDPI, vol. 13(17), pages 1-14, August.
    8. Markel Penalba & John V. Ringwood, 2016. "A Review of Wave-to-Wire Models for Wave Energy Converters," Energies, MDPI, vol. 9(7), pages 1-45, June.
    9. Wang, LiGuo & Lin, MaoFeng & Tedeschi, Elisabetta & Engström, Jens & Isberg, Jan, 2020. "Improving electric power generation of a standalone wave energy converter via optimal electric load control," Energy, Elsevier, vol. 211(C).
    10. Zang, Zhipeng & Zhang, Qinghe & Qi, Yue & Fu, Xiaoying, 2018. "Hydrodynamic responses and efficiency analyses of a heaving-buoy wave energy converter with PTO damping in regular and irregular waves," Renewable Energy, Elsevier, vol. 116(PA), pages 527-542.
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    Cited by:

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    2. Dragić, Mile & Hofman, Milan & Tomin, Veselin & Miškov, Vladimir, 2023. "Sea trials of Sigma wave energy converter – Power and efficiency," Renewable Energy, Elsevier, vol. 206(C), pages 748-766.
    3. Tatiana Potapenko & Joseph Burchell & Sandra Eriksson & Irina Temiz, 2021. "Wave Energy Converter’s Slack and Stiff Connection: Study of Absorbed Power in Irregular Waves," Energies, MDPI, vol. 14(23), pages 1-21, November.
    4. Budi Azhari & Fransisco Danang Wijaya & Edwar Yazid, 2021. "Performance of Linear Generator Designs for Direct Drive Wave Energy Converter under Unidirectional Long-Crested Random Waves," Energies, MDPI, vol. 14(16), pages 1-28, August.

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