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Salman Husain, Gordon G. Parker and Wayne W. Weaver
Multiple wave energy converter (WEC) buoys can be used to establish a WEC array-powered microgrid collectively forming a Marine Energy Grid (MEG). An oceanic domain with gravity waves will have significant spatial variability in phase, causing the power ...
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Shangyan Zou and Ossama Abdelkhalik
Wave energy converters (WECs) usually require reactive power for increased levels of energy conversion, resulting in the need for more complex power take-off (PTO) units, compared to WECs that do not require reactive power. A WEC without reactive power p...
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Joseba Lasa, Juan Carlos Antolin, Carlos Angulo, Patxi Estensoro, Maider Santos and Pierpaolo Ricci
This paper presents the construction, mathematical modeling and testing of a scaled universal hydraulic Power Take-Off (PTO) device for Wave Energy Converters (WECs). A specific prototype and test bench were designed and built to carry out the tests. The...
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De Zhi Ning, Xuan Lie Zhao, Li Fen Chen and Ming Zhao
The cost of wave energy converters (WECs) can be reduced significantly by integrating WECs into other marine facilities, especially in sea areas with a mild wave climate. To reduce the cost and increase the efficiency, a hybrid WEC system, comprising a l...
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Simon Thomas, Marianna Giassi, Mikael Eriksson, Malin Göteman, Jan Isberg, Edward Ransley, Martyn Hann and Jens Engström
This paper introduces a machine learning based control strategy for energy converter arrays designed to work under realistic conditions where the optimal control parameter can not be obtained analytically. The control strategy neither relies on a mathema...
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Nianxin Ren, Hongbo Wu, Kun Liu, Daocheng Zhou and Jinping Ou
This work presents a modular floating structure, which consists of five inner tension-leg platforms and two outermost wave energy converters (denoted as MTLPW). The hydrodynamic interaction effect and the mechanical coupling effect between the five inner...
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Jian Qin, Zhenquan Zhang, Xuening Song, Shuting Huang, Yanjun Liu and Gang Xue
In order to enhance the power generation efficiency and reliability of wave energy converters (WECs), an enclosed inertial WEC with a magnetic nonlinear stiffness mechanism (nonlinear EIWEC) is proposed in this paper. A mathematical model of the nonlinea...
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Yuan Zhang, Xuanyu Chen, Peng Xu, Xizeng Zhao, Ould el Moctar and Changqing Jiang
The development and utilization of wave energy, heralded as a potential leading source of clean energy worldwide, have garnered considerable attention from the global research community. Among the diverse array of wave energy converters (WECs), the raft-...
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Jian Tan, Xuezhou Wang, Henk Polinder, Antonio Jarquin Laguna and Sape A. Miedema
A crucial part of wave energy converters (WECs) is the power take-off (PTO) mechanism, and PTO sizing has been shown to have a considerable impact on the levelized cost of energy (LCOE). However, as a dominating type of PTO system in WECs, previous resea...
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Bingyong Guo, Tianyao Wang, Siya Jin, Shunli Duan, Kunde Yang and Yaming Zhao
There are more than thousands of concepts for harvesting wave energy, and wave energy converters (WECs) are diverse in operating principles, design geometries and deployment manners, leading to misconvergence in WEC technologies. Among numerous WEC devic...
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Nianxin Ren, Yuekai Yu, Xiang Li and Jinping Ou
For both the expansion of important islands/reefs and the development of marine resources in South China Sea, a modular integrated floating structure (MIFS) system with tidal self-adaptation dolphin-fender mooring (DFM) has been proposed. The DFM, couple...
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Yapo Wang, Lixian Zhang, Constantine Michailides, Ling Wan and Wei Shi
Due to the energy crisis and greenhouse effect, offshore renewable energy is attracting increasing attention worldwide. Various offshore renewable energy systems, such as floating offshore wind turbines (FOWTs), and wave energy converters (WECs), have be...
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Sergej Antonello Sirigu, Mauro Bonfanti, Ermina Begovic, Carlo Bertorello, Panagiotis Dafnakis, Giuseppe Giorgi, Giovanni Bracco and Giuliana Mattiazzo
A proper design of the mooring systems for Wave Energy Converters (WECs) requires an accurate investigation of both operating and extreme wave conditions. A careful analysis of these systems is required to design a mooring configuration that ensures stat...
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David G. Wilson, Rush D. Robinett III, Giorgio Bacelli, Ossama Abdelkhalik and Ryan G. Coe
This paper extends the concept of Complex Conjugate Control (CCC) of linear wave energy converters (WECs) to nonlinear WECs by designing optimal limit cycles with Hamiltonian Surface Shaping and Power Flow Control (HSSPFC). It will be shown that CCC for ...
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Nicolas Guillou, Georges Chapalain and Philippe Sergent
Accurate evaluations of the available and technically exploitable wave energy resources are fundamental to optimise the design and implementation of energy converters in the marine environment. However, long-term resource assessments have been primarily ...
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Yang Yi, Ke Sun, Yongqian Liu, Gang Ma, Chuankai Zhao, Fukang Zhang and Jianhua Zhang
The wave-energy excitation of point absorbers is highly associated with their resonant movement, and harmonic characteristics are of increasing concern in affecting resonance. However, the commonly used linearized power take-off (PTO) systems underestima...
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Jaime Cortés, Felipe Lucero, Leandro Suarez, Cristian Escauriaza, Sergio A. Navarrete, Gonzalo Tampier, Cristian Cifuentes, Rodrigo Cienfuegos, Daniel Manriquez, Bárbara Parragué, Nicole Osiadacz and Randy Finke
Current advances in wave energy technologies have enabled the development of new integrated measurement platforms powered by the energy of wave motion. Instrumentation is now being deployed for the long-term observation of the coastal ocean, with the obj...
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Timothy Vervaet, Vasiliki Stratigaki, Brecht De Backer, Kurt Stockman, Marc Vantorre and Peter Troch
Commercial wave energy exploitation will be realised by placing multiple wave energy converters (WECs) in an array configuration. A point-absorber WEC consists of a floating or submerged body to capture wave energy from different wave directions. This po...
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Nerea Portillo Juan, Vicente Negro Valdecantos, M. Dolores Esteban and José Santos López Gutiérrez
Wave energy is one of the most powerful sources of energy on our planet, but its exploitation is difficult. Much current research on renewable energy is focused on how to harness ocean energy. However, wave energy converter (WEC) technology is still imma...
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Timothy Vervaet, Vasiliki Stratigaki, Francesco Ferri, Louis De Beule, Hendrik Claerbout, Bono De Witte, Marc Vantorre and Peter Troch
To offer point absorber wave energy converters (WECs) as a bankable product on the marine renewable energy market, multiple WECs will be installed together in an array configuration. The wave energy community (research and industrial) has identified the ...
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