To meet future operational demands of large-scale naval vessels, electrical generation capacity in excess of 100 MW is anticipated. With this capacity, there is growing concern that a fault occurrence on the low voltage switchboards will lead to unacceptably high fault currents. Prudent steady-state design of the electrical network topology is therefore essential to ensure that fault current levels are minimised while maintaining steady-state voltage levels within the required tolerance. In addition to steady-state metrics, the dynamic response of the uncontrolled system should be considered at the network design stage. This allows emphasis to be placed on options for improving the dynamic response of the system through prudent network design, and not control system action, thereby improving the security of the electrical network and minimising the complexity of resulting control systems. Consideration of both steady-state and dynamic metrics in the network design process leads to an iterative co-operative analysis and design approach, which can be considered optimised in terms of minimising fault levels and maximising power system performance. This paper will present this co-operative approach and a case study of its application, highlighting the benefits of adopting the technique to marine power system design.
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