Security assessment of DC zonal naval-ship power system

Security assessment of naval-ship power system under different fault conditions is important for real time operation of naval-ship power system. The existing indices of security assessment did not incorporate the probability of disturbances: therefore this paper proposes a probabilistic security assessment index. As the naval ship architecture is integrated with DC zonal distribution, then a special power flow analysis is needed for the AC/DC IPS system. The paper addresses the incorporation of power flow analysis of naval-ship power system with power electronic devices, security analysis of architecture based on the expected contingency margin, and rank of different contingencies and their implication on system security. The approach is tested on one of the DC zonal naval ship power system topologies