Journal
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS
Volume 55, Issue 6, Pages 6476-6485Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TIA.2019.2938149
Keywords
Boost converter; buck converter; constant power load (CPL); dc-dc converter; interconnection and damping assignment passivity-based control (IDA-PBC); more electric aircraft (MEA); on-board distribution system; port-controlled Hamiltonian (PCH) system
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In the more electric aircraft context, dc distribution systems have a time-varying structure due to the flexible distributed loads and complex operation conditions. This feature poses challenges for system stability and increases the difficulty of the stability analysis. Besides, the risk of instability may be increased under constant power load condition due to the negative incremental impedance characteristic. To this end, this article proposes an improved interconnection and damping assignment passivity-based control scheme. Particularly, an adaptive interconnection matrix is developed to establish the internal links in port-controlled Hamiltonian models and to generate the unique control law. The damping assignment technique is addressed to tune the dynamic characteristic. In order to meet the load requirements of different voltage levels, the design procedures were given for determining the control law in both boost converter and buck converter cases. The simulation and experimental results are performed to demonstrate the validity of the proposed control approach.
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