Modeling, simulation and experimental validation of a DC power system testbed

The modeling, simulation and experimental validation of the primary bus components of a dc power system testbed are presented herein. This reduced scale and reduced complexity dc testbed is representative of medium voltage dc (MVDC) systems being considered for shipboard next generation integrated power systems (NGIPS). The primary system components include a 4-pole wound-rotor synchronous generator and a propulsion drive based on an induction machine driven by a fully controlled three-phase bridge inverter with an input filter. Four simulation models are presented: a detailed waveform model, a simplified waveform model, a detailed non-linear average value model, and a simplified non-linear average value model. These models have been implemented in the Advanced Continuous Simulation Language (ACSL). The simplified waveform and average value model (AVM) versions of the ACSL truth models were converted to Simulink to aid dissemination to other researchers. System stability is addressed via time domain simulation and a generalized immittance based stability analysis. The time-domain models and frequency domain stability analysis provide consistent results validated by the experimental results provided herein.