IEEE Electrification Magazine - December 2013 - 40

Figure 1. The power system architecture of an all-electric ship. The system is characterized with multiple power sources, storage elements, and
multiple-load topologies, all connected through a reconfigurable power distribution bus.

paradoxically, the fact that electronic power converters
can and do generally moderate fault currents in dc systems
means that circuit protection is more difficult than in ac
systems. in infinite grid ac systems, fault currents are typically 10-100 times larger than the nominal rated currents,
and this substantially greater current actually assists in

blowing the arcs into the arc chute of a circuit breaker. By
contrast, currents in dc systems may be limited by the
source-side power converters, and currents may not
become large enough to signal a fault; even if they are, this
may not generate the requisite J # B forces needed to
quickly move the arc.

Converter 1

Converter 2

Main
Turbine

Auxiliary
Turbine

Propulsion

Fault
Cable 1-3
Fault
Zone 2

Fault
Zone 1
Load
Zone 3

Propulsion

Load
Zone 1

Load
Zone 2

Load
Zone 4

Auxiliary
Turbine

Main
Turbine
Converter 3

Converter 4

Figure 2. A multiterminal MVdc distribution system. The blue squares are mechanical contactors. They can be either contactors or no-load bus
tie switches, and they are not required to open on sustained fault current like circuit breakers.

40

I E E E E l e c t r i f i c ati o n M agaz ine / december 2013



Table of Contents for the Digital Edition of IEEE Electrification Magazine - December 2013

IEEE Electrification Magazine - December 2013 - Cover1
IEEE Electrification Magazine - December 2013 - Cover2
IEEE Electrification Magazine - December 2013 - 1
IEEE Electrification Magazine - December 2013 - 2
IEEE Electrification Magazine - December 2013 - 3
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IEEE Electrification Magazine - December 2013 - Cover3
IEEE Electrification Magazine - December 2013 - Cover4
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https://www.nxtbook.com/nxtbooks/pes/electrification_june2022
https://www.nxtbook.com/nxtbooks/pes/electrification_march2022
https://www.nxtbook.com/nxtbooks/pes/electrification_december2021
https://www.nxtbook.com/nxtbooks/pes/electrification_september2021
https://www.nxtbook.com/nxtbooks/pes/electrification_june2021
https://www.nxtbook.com/nxtbooks/pes/electrification_march2021
https://www.nxtbook.com/nxtbooks/pes/electrification_december2020
https://www.nxtbook.com/nxtbooks/pes/electrification_september2020
https://www.nxtbook.com/nxtbooks/pes/electrification_june2020
https://www.nxtbook.com/nxtbooks/pes/electrification_march2020
https://www.nxtbook.com/nxtbooks/pes/electrification_december2019
https://www.nxtbook.com/nxtbooks/pes/electrification_september2019
https://www.nxtbook.com/nxtbooks/pes/electrification_june2019
https://www.nxtbook.com/nxtbooks/pes/electrification_march2019
https://www.nxtbook.com/nxtbooks/pes/electrification_december2018
https://www.nxtbook.com/nxtbooks/pes/electrification_september2018
https://www.nxtbook.com/nxtbooks/pes/electrification_june2018
https://www.nxtbook.com/nxtbooks/pes/electrification_december2017
https://www.nxtbook.com/nxtbooks/pes/electrification_september2017
https://www.nxtbook.com/nxtbooks/pes/electrification_march2018
https://www.nxtbook.com/nxtbooks/pes/electrification_june2017
https://www.nxtbook.com/nxtbooks/pes/electrification_march2017
https://www.nxtbook.com/nxtbooks/pes/electrification_june2016
https://www.nxtbook.com/nxtbooks/pes/electrification_december2016
https://www.nxtbook.com/nxtbooks/pes/electrification_september2016
https://www.nxtbook.com/nxtbooks/pes/electrification_december2015
https://www.nxtbook.com/nxtbooks/pes/electrification_march2016
https://www.nxtbook.com/nxtbooks/pes/electrification_march2015
https://www.nxtbook.com/nxtbooks/pes/electrification_june2015
https://www.nxtbook.com/nxtbooks/pes/electrification_september2015
https://www.nxtbook.com/nxtbooks/pes/electrification_march2014
https://www.nxtbook.com/nxtbooks/pes/electrification_june2014
https://www.nxtbook.com/nxtbooks/pes/electrification_september2014
https://www.nxtbook.com/nxtbooks/pes/electrification_december2014
https://www.nxtbook.com/nxtbooks/pes/electrification_december2013
https://www.nxtbook.com/nxtbooks/pes/electrification_september2013
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