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Distribution load flow methods for shipboard power systems

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2 Author(s)
Lewis, S.A. ; Region I Office, U.S. Nucl. Regul. Comm., King Of Prussia, PA, USA ; Baldwin, T.L.

With the initiatives to modernize large ship power systems, ship builders are integrating technologies with the aim of an all-electric energy system. Integrated power systems provide total ship power including motor-drive propulsion, service and hospitality loads, and mission-defined load configurations. New control strategies permit distribution automation and network reconfiguration. The system objective is to provide flexibility and control in directing where power is needed with a high level of reliability and quality. The automated controls require efficient and accurate load flow solutions in monitoring and regulate the power system. A critique of classical and distribution power flow methods is conducted for shipboard distribution automation. Three classical radial-network power-flow methods are reviewed. Modification of a forward-backward sweep method, enhancing the computation time and solution convergence is presented. Comparative tests are conducted on a new benchmark test system of a ship's distribution network. The results demonstrate that the modified forward-backward sweep method succeeds in being the fastest methods with good convergence on networks with high R/X ratios.

Published in:

Industry Applications Conference, 2003. 38th IAS Annual Meeting. Conference Record of the  (Volume:2 )

Date of Conference:

12-16 Oct. 2003

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