Modeling and Control of Three-Port DC/DC Converter Interface for Satellite Applications

    Authors

    Z. J. Qian; O. Abdel-Rahman; H. Al-Atrash;I. Batarseh

    Comments

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    Abbreviated Journal Title

    IEEE Trans. Power Electron.

    Keywords

    DC-DC converters; digital control; mode transition; multi-input; multi-output (MIMO); multiport; small-signal modeling; state-space; averaging; DC-DC CONVERTER; FUEL-CELL; MULTIPLE; TRANSFORMER; Engineering, Electrical & Electronic

    Abstract

    This paper presents the control strategy and power management for an integrated three-port converter, which interfaces one solar input port, one bidirectional battery port, and an isolated output port. Multimode operations and multiloop designs are vital for such multiport converters. However, control design is difficult for a multiport converter to achieve multifunctional power management because of various cross-coupled control loops. Since there are various modes of operation, it is challenging to define different modes and to further implement autonomous mode transition based on the energy state of the three power ports. A competitive method is used to realize smooth and seamless mode transition. Multiport converter has plenty of interacting control loops due to integrated power trains. It is difficult to design close-loop controls without proper decoupling method. A detailed approach is provided utilizing state-space averaging method to obtain the converter model under different modes of operation, and then a decoupling network is introduced to allow separate controller designs. Simulation and experimental results verify the converter control design and power management during various operational modes.

    Journal Title

    Ieee Transactions on Power Electronics

    Volume

    25

    Issue/Number

    3

    Publication Date

    1-1-2010

    Document Type

    Article

    Language

    English

    First Page

    637

    Last Page

    649

    WOS Identifier

    WOS:000276253300004

    ISSN

    0885-8993

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