Modeling and control of ship propulsion with shaft generator and battery storage system

Abstract

The use of shaft generators in marine applications makes it possible to operate the main engine more efficiently and to provide additional power to the electrical system. This paper develops a dynamic model and controller for a hybrid marine propulsion system that operates efficiently in both mechanical and hybrid modes such as power take-off (PTO). A simplified electric power system model with a shaft generator and a battery set is introduced into the ship propulsion system. The corresponding control and switching logics are also described and are proved with simulations.