Reliability Modeling and Analysis of DC Space Microgrids

This work presents a space microgrid architecture for long-term space exploration and human presence in space. It also considers internal and external microgrid faults, and their effects on the functionality of the space habitat. Additionally, it presents a qualitative reliability assessment model for the space microgrid based on Fault Tree Analysis (FTA). The paper presents different failure modes of the power system components, classifies their importance, and assesses the reliability of the system in multiple phases of operation and with different power management and control systems. Simulation results to assess the microgrid's reliability for various disturbance scenarios in a space habitat model are shown.