Modeling, reconfiguration and loss modeling of multi-drive propulsion system under inverter faults in all-electric ships

This article models an all-electric ship as a multidrive marine propulsion system from an electromechanical perspective and evaluates the overall losses in the system at various inverter faults. The model can be divided into electric drive controls modelling and the actual ship model. The electrical drive part of the model consists of the supervisory controller and electrical motor drives along with all its losses, while the ship model accounts for the hull resistance loss, thrust power calculations and the propeller losses for a YP yard patrol craft. Losses of the multi-drive propulsion system are evaluated under normal-mode and limp-mode operation and the impact of faults and reconfiguration of load on system losses are studied.