一种新型直流快速开关设计

Design of a Novel DC Fast Switch

直流快速开关是直流供电系统的安全保障,起着分断故障电流的作用。相较于交流系统,直流系统对直流快速开关的分闸速度、开断固有时间及灭弧能力的要求更加严格。为提高直流快速开关对直流配电网的实用性,总结了现有直流快速开关操动机构、保持机构及灭弧能力等方面的不足,并在此基础上设计出一种双断口、双灭弧室且具有机械保持结构的新型直流快速开关,极大地提高了直流快速开关的性能,具有广泛的应用前景。

The DC fast switch is the safety guarantee of the DC power supply system and plays a role in breaking the fault current.Compared with AC system,DC system has more strict requirements on opening speed,inherent time of breaking and arc extinguishing ability of DC fast switch.In order to improve the practicability of DC fast switch to DC distribution network,the shortcomings of existing DC fast switch operating mechanism,holding mechanism and arc extinguishing ability are summarized.On this basis,a novel type of DC fast switch with double fracture,double arc extinguishing chamber and mechanical holding structure is designed,which greatly improves the performance of DC fast switch and has a wide application prospect.