Title :
Benefits of HTS technology to ship systems
Author :
Kalsi, Swam S. ; Henderson, Nancy ; Gritter, Dave ; Nayak, Om ; Gallaghe, Chuck
Author_Institution :
SuperMachines Bus. Unit, American Superconductor Corp., Westborough, MA, USA
Abstract :
This paper presents results of the ´analysis of high-temperature superconductor benefits for ship systems´ study commissioned by U.S. Office of Naval Research (ONR) in 2004. The total power requirement is approaching 100 MW on large U.S. navy surface ships. High-temperature superconductor (HTS) alternating current (AC) synchronous motors and generators scale advantageously compared to other technologies. ONR initiated this study, which focuses on evaluating factors that optimize HTS component weights, sizes, and efficiencies in various ship system configurations. The study concludes that ship electrical systems based on 6.6 kV and 9.9 kV bus voltages are feasible without requiring transformers. On the basis of this analysis, 60 Hz systems at 6.6 kV and 9.9 kV are recommended for both large and small combatant ships. The availability and supportability of commercial-off-the-shelf (COTS) components in 60 Hz systems provides benefits, such as improved reliability, reduced technical risk and reduced cost, while having minimal impact on the system´s weight, size, and footprint. Systems using the second generation (2G) HTS wire had improved weight, size, and efficiency benefits over systems using the first generation (1G) HTS wire. The most attractive option for the variable speed drive (VSD) is a diode-clamped pulse width modulated (PWM) drive.
Keywords :
cost reduction; high-temperature superconductors; reliability; risk management; ships; synchronous generators; synchronous motors; variable speed drives; 6.6 kV; 60 Hz; 9.9 kV; HTS technology; U.S. Office of Naval Research; alternating current synchronous generators; alternating current synchronous motors; commercial-off-the-shelf; cost reduction; diode-clamped pulse width modulated drive; first generation HTS wire; high-temperature superconductor; improved reliability; second generation HTS wire; ship systems; technical risk reduction; variable speed drive; AC generators; Availability; Costs; High temperature superconductors; Marine vehicles; Pulse width modulation; Synchronous generators; Synchronous motors; Transformers; Wire;
Conference_Titel :
Electric Ship Technologies Symposium, 2005 IEEE
Conference_Location :
Philadelphia, PA
Print_ISBN :
0-7803-9259-0
DOI :
10.1109/ESTS.2005.1524712