Series-vs. Parallel-connected ship generators

WHEN A NUMBER of d-c diesel-driven generators are used to supply propulsion power to a motor driving a ship´s propeller, the generators usually are connected in series. The series system has many advantages and in most cases is the proper selection. However, there are applications where the advantages obtained by the use of parallel-connected generators more than offset the problems encountered in the use of this system. Therefore unless the answer is obvious, it is wise to study the particular system involved before making a final decision with regard to series or parallel connection of the generators.