Simulation Modeling and Research of Integrated Shipboard Power System Based on SimuNPS

In response to the industry demands for the development of shipboard power systems towards high efficiency and low carbonization, this paper proposes a modeling and simulation method for the low-voltage direct current (LVDC) integrated shipboard power system based on the SimuNPS software. With a voltage level of 710V, the system integrates synchronous generators, propulsion motors, lithium-ion battery energy storage systems, and various types of power electronic converters, and is modeled using a dual-bus redundancy + zoned power distribution topology. Its performance is verified through tests under four typical operating conditions: baseline steady state, load mutation, equipment failure, and bus paralleling. Simulation results show that during steady-state operation, the DC bus voltage of the system is stable at 710 ± 2 V; under conditions of sudden load change or generator failure, the voltage can be restored within 0.2 s; and there is no obvious impact during dual-bus paralleling. This fully verifies the validity of the model and the dynamic stability of the system, providing simulation support for the engineering design of LVDC shipboard power systems.