Evaluating Constant DC-Link Operation of Wave Energy Converter
2012 (English)In: Proceedings of the 31st ASME International Conference on Ocean, Offshore and Arctic Engineering, vol. 7, 2012, 269-276 p.Conference paper (Refereed)
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.
Engineering and Technology
Research subject Engineering Science with specialization in Science of Electricity
IdentifiersURN: urn:nbn:se:uu:diva-190218DOI: 10.1115/OMAE2012-83339ISI: 000324507000033ISBN: 978-0-7918-4494-6OAI: oai:DiVA.org:uu-190218DiVA: diva2:583150
31st International Conference on Ocean, Offshore and Arctic Engineering, Jul 01-06, 2012, Rio de Janeiro, Brazil