Research on Ship-applied Low-voltage DC Smart Power Distribution Equipment with Current-limiting

Traditional power distribution systems in ship field usually adopt power breakers, contactors, relays and fuses as power distribution devices, thus result in low fault response and lack of current-limiting, so loads with high current spikes when started may result in large voltage drop on the DC power bus or misoperation of the power distribution branch, moreover, short-circuit may bring great damage to the whole power system. In this paper, a smart power distribution equipment is proposed, to automatically distinguish different load type and state, realize current-limiting when large capacitive load is started and cut off the power distribution branch whenever short-circuit occurs. This technique greatly increases the smart management capability of the power system. The feasibility and effectiveness of this technique is verified by the experiments carried out on a 24V/2kW prototype.