Advanced simulation concept for onboard ship grids featuring complex multiterminal power-electronic systems

State-of-the-art naval applications offer a high level of complexity, containing e.g. linear, hybrid and nonlinear elements. To achieve both, high supply reliability and high voltage quality, the topics grid stability, interaction and error scenarios have to be taken into account in the early conceptual design work-phase which is dominated by simulative analysis. In this paper a simulation concept is presented providing high accuracy, short simulation time and the use of multiterminal applications. Furthermore development time losses by program portation are minimised using an interface for control algorithms implemented in C. The capability of this concept is outlined by simulation results of a multiterminal DC ship power-distribution grid containing four three-phase two-level inverters.