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Evaluating Constant DC-Link Operation of Wave Energy Converter
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Electricity.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Electricity.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Electricity.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Electricity.
2012 (English)In: Proceedings of the 31st ASME International Conference on Ocean, Offshore and Arctic Engineering, vol. 7, 2012, 269-276 p.Conference paper, Published paper (Refereed)
Abstract [en]

A Wave Energy Converter (WEC) based on a linear generator and a point-absorbing buoy has been developed at Uppsala University. Interconnecting an array of WECs in parallel requires a point of common coupling, such as a common DC-bus. The DC voltage level seen by the generator is directly linked to the electromagnetic damping of the generator A lower DC-level results in a higher damping factor and is important for increased absorption of the wave power The drawback is increased losses in generator windings and cable resistance. There will be an optimal DC-level for maximum power output. This is a function of not only generator and buoy characteristics, but the current sea state. Experimental results of the full-scale system have been carried out, and used as validation of a simulation model of the system. The model is then used to evaluate how the DC-level seen by the generator influence the power output. The results indicate that higher DC-levels should be used at higher sea states, and power output may vary by up to a factor five depending on which DC-level is chosen.

Place, publisher, year, edition, pages
2012. 269-276 p.
National Category
Engineering and Technology
Research subject
Engineering Science with specialization in Science of Electricity
Identifiers
URN: urn:nbn:se:uu:diva-190218DOI: 10.1115/OMAE2012-83339ISI: 000324507000033ISBN: 978-0-7918-4494-6 (print)OAI: oai:DiVA.org:uu-190218DiVA: diva2:583150
Conference
31st International Conference on Ocean, Offshore and Arctic Engineering, Jul 01-06, 2012, Rio de Janeiro, Brazil
Available from: 2013-01-07 Created: 2013-01-07 Last updated: 2013-12-12Bibliographically approved

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Ekström, RickardKurupath, VenugopalanBoström, CeciliaSvensson, Olle

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