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Appl. Sci. 2013, 3(2), 420-436; doi:10.3390/app3020420

Power Collection from Wave Energy Farms

1,* , 1
1 Fred. Olsen / Norwegian University of Science and Technology, Fred. Olsens Gate 2, N0152 Oslo, Norway 2 Department of Electric Power Engineering, Norwegian University of Science and Technology, O. S. Bragstads plass 2E, N-7034 Trondheim, Norway
* Author to whom correspondence should be addressed.
Received: 7 January 2013 / Revised: 12 March 2013 / Accepted: 13 March 2013 / Published: 2 April 2013
(This article belongs to the Special Issue Renewable Energy)
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Most Wave Energy Converters (WECs) produce highly distorted power due to thereciprocal motion induced by ocean waves. Some WEC systems have integrated energystorage that overcomes this limitation, but add significant expenses to an already costlysystem. As an alternative approach, this article investigates the direct export option thatrelies on aggregate smoothing among several WECs. By optimizing the positioning of theWEC devices with respect to the incoming waves, fluctuations may be mutually canceledout between the devices. This work is based on Fred. Olsen’s WEC system Lifesaver, anda WEC farm consisting of 48 devices is designed in detail and simulated. The major costdriver for the electrical export system is the required oversize factor necessary for transferof the average power output. Due to the low power quality, this number can be as high as20 at the entry point of the electrical system, and it is thus crucial to quickly improve thepower quality so that the downstream power system is efficiently utilized. The simulationsundertaken in this work indicate that a high quality power output can be achieved at the farmlevel, but that a significant oversize factor will be required in the intermediate power systemwithin the farm.
Keywords: wave; energy; array; farm; power; quality; peak; average; ratio wave; energy; array; farm; power; quality; peak; average; ratio
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Sjolte, J.; Tjensvoll, G.; Molinas, M. Power Collection from Wave Energy Farms. Appl. Sci. 2013, 3, 420-436.

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