Modeling and simulation of a hybrid electric propulsion system of a green ship

In this work, the hybrid electric propulsion system of a marine vehicle was modeled in MATLAB Simulink and SimPowerSystems. Models of each of the propulsion components were developed and incorporated into a complete system propulsion model. A rule-based supervisory mode controller was constructed which specifies the combination of onboard power sources to be used throughout the mission cycle. The hybrid electric propulsion and control model was simulated on a dSPACE hardware-in-the-loop platform. For each simulation, the energy storage system state of charge, HEV mode, propeller motor drive speed set point, and hotel load were specified. This study forms the foundation for further research in ship hybrid electric propulsion system design and power management.

I Introduction

All-electric and hybrid electric ship propulsion has become a leading/emerging area of research, prompting investigation in hybrid propulsion system design, and demonstration of concept vessels. With respect to ship design and operation, minimizing costs associated with fuel consumption and maintenance are key objectives. As well, new and existing ships are being subject to regulatory requirements, specifically regarding emissions and energy efficiency. Hybrid electric propulsion has shown to be a promising approach in addressing these concerns, particularly for smaller scale vessels requiring a high degree of maneuverability.