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Abstract
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In this paper, an integrated power system (IPS) based on fuel
cell (FC), battery, photovoltaic panels (PV), and two diesel generators is
proposed and modeled for an all-electric ship to address a solution for
the high pollution resulting from conventional ships. Dual active bridge
(DAB) converter and its nonlinear average model which is faster and
more suitable for system-level studies has been used as power electronic
interface. A decentralized model predictive control (MPC) strategy is also
designed to control the modules of the IPS. A hierarchical control method
with virtual droop control is proposed to control the power generation of
diesel generators and regulate the DC link voltage of the IPS. Moreover, a
power management strategy for efficient operation of diesel generators,
FC and battery is considered in this study. It is important to note that, the
diesel generators considered in this power system make this ship more
applicable for longer voyages. The proposed system has been studied in
various operational modes considering the battery and load conditions in
MATLAB/SIMULINK environment and its validity is shown through the
obtained results. Furthermore, the simulation results show good response
in a long run which is a sign of its suitability for system-level studies.
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