Fault tolerant shipboard MVDC architectures

Abstract

Medium Voltage DC (MVDC) architectures are identified from the literature search that are suitable for a highly survivable 20kVdc shipboard Integrated Power System (IPS). “Breaker-based” architectures enable fast fault isolation through the use of Solid State Protective Device (SSPD) technology. “Breaker-less” architectures require based generator power converter and Solid State Transformer (SST) interfaces that can fold back outputs and coordinate with no load switches to isolate faults. Estimated size/weights and survivability of various “breaker-based” and “breaker-less topologies are compared. “Breaker-Less”, Current Source Converter (CSC) based architectures have the highest power density but at the cost of lower survivability. Expanding the role of galvanically isolating converters within the system (i.e. SSTs) increases power density and survivability.