Distributed Energy Management of Electrically Propelled Vessels for Shipboard Microgrid

This paper proposes a distributed economic dispatch method for all-electric ship microgrids. Firstly, for an all-electric ship microgrid equipped with diesel generator sets, renewable energy sources, and energy storage devices, this paper constructs an economic dispatch model. Through variable substitution, marginal costs are adopted as decision variables while considering the ship’s speed-dependent load. The model minimizes global costs by achieving marginal cost consensus. Secondly, a discrete distributed algorithm more closely aligned with practical models is proposed to solve this optimization problem. Finally, simulation results demonstrate the accuracy and effectiveness of the proposed model and algorithm through comparison with centralized methods.