Power System Considerations for

Abstract—Power systems for undersea observatories combine ideas from terrestrial power systems and switching power supplies with experience from undersea cable systems. Basic system trade-offs for various design decisions are explored in this paper. First, design questions including whether the power delivery should be alternating or direct current and a parallel or series network are examined. This introduces the question of maximum power de-livery capability, which is explored in depth. A separate issue, the negative incremental resistance presented to the delivery system by the use of constant-voltage converters, is examined, and the re-sulting dynamics explored by simulation. Index Terms—DC/DC converter, dc power systems, medium voltage dc converters, ocean observatories. I