直流电力系统短路限流装置研究

Research on short-circuit limiting device for D.C.power system

随着舰船电力系统容量的增加,其短路电流水平不断提高,急需研究一种分断速度快、限流能力强的新型限流保护装置。混合型限流熔断器相对于普通限流熔断器具有功率损耗低、限流能力强的优点。文中介绍了两种新型限流熔断器的结构组成、工作原理和特性,指出被动式混合型熔断器与电子控制的主动式混合型限流熔断器相比,因其无需外部电源、传感器及电子控制单元,可靠性更高且体积更小。

The current level of short-circuit rises with an increase of the shipboard power system, and it is urgent to develop a novel current limiting device which can act fast and effectively. Comparing with the normal current limiting fuse ,hybrid current limiting fuse has the advantages of lower power loss and better current limiting capacity. This paper introduces the structure composition, working fundamentals and characteristics of the two new hybrid current limiting fuses. It shows that compared with the active type hybrid current limiting fuse, the passive type has the advantage of higher reliability and smaller volume due to the absence of external power source, current sensor and controlling unit.