Protection Schemes in Low-Voltage DC Shipboard Power Systems

Conference: PCIM Europe 2018 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
06/05/2018 - 06/07/2018 at Nürnberg, Deutschland

Proceedings: PCIM Europe 2018

Pages: 7Language: englishTyp: PDF

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Kim, Seongil; Dujic, Drazen (Power Electronics Laboratory, École Polytechnique Fédérale de Lausanne (EPFL), Switzerland)
Kim, Soo-Nam (Power Control Research Department, Hyundai Electric, Repulic of Korea)

Shipbuilding industry has increased interest into DC shipboard power systems (SPS) for their benefits, such as improved fuel efficiency and installation footprint. These new power systems come with technical challenges in system protection owing to lack of natural zero crossing in case of DC fault cur- rents and low thermal capability of semiconductors. This paper presents feasible protection schemes against DC short circuit faults for three different types of, commercially available, low-voltage DC (LVDC) rectifier systems: a six-pulse diode recti- fier, a six-pulse thyristor rectifier and a two-level ac- tive rectifier. In addition, a novel protection method, which provides a simply way for limiting fault cur- rents, is proposed and discussed for the active rec- tifier