Design and Implementation of Power Management Algorithm for Efficient Operation of Fishing Vessel With Battery Integrated Hybrid Shaft Generator/Motor System

In today's maritime industry, energy-efficient operations on ships are gradually increasing in parallel with the decrease in battery prices, advancements in battery technology, and the desire to reduce carbon emissions. Hybrid shaft generator/motor (SG/M) systems are an alternative solution to further enhance energy efficiency by capturing and utilizing the excess power. This study presents a new advanced power management algorithm for a marine vessel equipped with a hybrid SG/M, battery, and internal combustion main engine (ME), including the peak shaving function. With the proposed algorithm, peak shaving is performed for both the ME and the ac grid, minimizing the impact of operational load variations on the ME and eliminating the need for additional diesel generators (DGs) to cope with overload and short-term load increases, thus reducing fuel consumption. Experimental investigations are conducted on a fishing vessel to test the performance of the proposed algorithm. The peak shaving capabilities of the ME, ac grid, and direct current (dc) link control performances are examined under different loading cases. The power flow capabilities and oscillation values confirm the performance and effectiveness of the proposed system.