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In this paper, different power balance control methods for hybrid marine vessels are analyzed. First, the power grid of a marine vessel is modeled using MATLAB and Simulink. Simulations are then performed using real power plant load data captured from an actual vessel. Isochronous control is used to control the power of the diesel gensets, and different control methods, such as isochronous control and average load power estimation, are used for the battery energy storage system. The system is simulated with different control parameters, and the effects of parameter changes are presented. It is shown that these presented control schemes can be adapted to manage the energy balance in a hybrid vessel, thereby enabling efficient use of the battery energy storage system. A diesel genset and battery energy storage system failure during a dynamic positioning operation is also simulated, and the effect of the failure on the frequency of the power grid of the vessel is presented.

Comparison of Different Power Balance Control Methods for Battery Energy Storage Systems on Hybrid Marine Vessels