Multiconverter Power Systems and Their Applications

As the power systems evolve to contain more and more solid-state devices, a new type of power system emerges. We call this solid-state, silicon rich, silicon intensive, power electronics based, or, as is named in this paper, multiconverter power systems. In these systems, solid-state switching power converters are extensively used for generating, distributing, and utilizing of electrical energy throughout the system. Different converters, such as DC/DC choppers, DC/AC inverters, AC/AC cycloconverters, and AC/DC rectifiers, are used in source, load, and distribution subsystems to provide power at different voltage levels and both DC and AC forms. Most of the loads are also in the form of power electronic converters and motor drives. These systems have a broad variety of applications from small multiconverter power systems, such as automotive power systems, Electric and Hybrid Electric Vehicles (EV & HEV), advanced industrial electrical systems, telecommunications, and terrestrial computer systems with a few converters, to large systems, such as International Space Station (ISS), spacecraft, modern aircraft, submarine, and More Electric Ship (MES) power systems with many converters. Furthermore, these unconventional power systems have unique characteristics, dynamics, and stability problems that are just beginning to be appreciated. In this paper, we take a closer look at multiconverter power systems and address the fundamental problems faced in these systems. We also propose the multiconverter power systems as a new area of specialized research, which will have benefits in many applications.

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