  The series-paralleling technique of dc-dc converters is utilized in various
domains of electrical engineering for improved power conversion. Previous
studies have proposed and classified the control schemes for the
series-paralleled converters. However, they have several restrictions and lack
diversity. The purpose of this paper is to propose passivity-based control
(PBC) for the diverse output series-parallel connection of dc-dc converters. It
is proved that the output series-paralleled converters regulated by PBC are
asymptotically stable. The output series-paralleled converters are numerically
simulated to confirm the asymptotic stability. PBC is shown to maintain the
stability of the output series-paralleled converters with diverse circuit
topologies, parameters, and steady-states. The result of this paper
theoretically supports the numerical and experimental considerations in the
previous studies and justifies the further extension of the series-parallel
connection.

Systems and Control;Systems and Control;Dynamical Systems