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Article
Affiliation(s)

1. College of Logistics Engineering, Shanghai Maritime Univ., Shanghai 201306, China
2. College of Electrical Engineering, Shenyang University of Technology, Liaoning 110870, Shenyang, China

ABSTRACT

System control and safety reliability are important links of the marine DC (Direct Current) power system. The simulation model is built by Matlab/Simulink, the battery and super-capacitor are supplied to the system through a three-phase interleaved DC/DC converter, the fuse and disconnector switch combination are used as the protection device, and the short-circuit point is set between each branch and the DC distribution board, performing short-circuit simulation. This paper also proposes a short-circuit calculation method for super-capacitors based on the simplified model of series RC (Resistors & Capacitors), and verifies its correctness through simulation data. The results show that the introduction of a three-phase interleaved DC/DC converter reduces the current ripple and makes the system control more convenient; short-circuit calculation and simulation have determined the short-circuit withstand capability of the DC distribution board, and verified the feasibility of the fuse selection method and the short-circuit calculation method of the super-capacitor. This provides reliable verification for the application and calculation of the actual project.

KEYWORDS

Matlab/simulink simulation, three-phase interleaved DC/DC, battery and super-capacitor, short-circuit protection and calculation.

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