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

Yue Hong, Irina Temiz, Jianfei Pan, Mikael Eriksson and Cecilia Boström
Additional contact information
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

Energies, 2021, vol. 14, issue 4, 1-21

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.

Keywords: wave energy converter; permanent magnet linear generator; wave climate; damping coefficient; optimal (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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