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Dynamic Positioning System as Dynamic Energy Storage on Diesel-Electric Ships

Johansen, Tor Arne; Bø, Torstein Ingebrigtsen; Mathiesen, Eirik; Veksler, Aleksander Vladimirovitsj; Sørensen, Asgeir Johan
Journal article, Peer reviewed
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URI
http://hdl.handle.net/11250/2396144
Date
2014
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  • Institutt for teknisk kybernetikk [2858]
  • Publikasjoner fra CRIStin - NTNU [26671]
Original version
IEEE Transactions on Power Systems 2014, 29:3086-3091   10.1109/TPWRS.2014.2317704
Abstract
A dynamic positioning (DP) system on a diesel-electric ship applies electric power to keep the positioning and heading of the ship subject to dynamic disturbances due to the winds, waves and other external forces using electric thrusters. Vice versa, position and heading errors can be allowed in order to implement energy storage in the kinetic and potential energy of the ship motion using the DP control system to convert between mechanical and electrical power. New simple formulas are derived in order to relate the dynamic energy storage capacity to the maximum allowed ship position deviation, as a function of the frequency of the requested dynamic energy storage. The benefits of DP dynamic energy storage are found to be reduced diesel-generator maintenance need, reduced fuel consumption and emissions, reduced risk for blackout, and increased operational flexibility allowing power-consuming operations such as drilling and lifting to be safely prioritized over DP for short periods of time.
Publisher
IEEE
Journal
Dynamic Positioning System as Dynamic Energy Storage on Diesel-Electric Ships
Copyright
(c) 2014 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.

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