直流系统短路电流计算与保护元件选型  

Calculation of Short Circuit Current in DC System andProtection Component Selection

作　　者：滕喆 TENG Zhe(Design and Management Institute of China Construction Eighth Engineering Division Co.,Ltd.,Shanghai 201206,China)

机构地区：[1]中建八局设计管理总院,上海201206

出　　处：《现代建筑电气》2020年第9期42-46,61,共6页Modern Architecture Electric

摘　　要：电气系统设计中,直流供电系统主要用于向重要用电负荷提供电源,在配电系统中的重要性也越来越高。以某直流供电系统为例,确定了直流供电系统等效模型以及短路工况下等效电路,计算了短路点的短路电流值以及对应的时间常数,并据此验证了短路点保护元件选型的合理性。The DC system is mainly used to supply the important loads in the design of electrical system,and it is more and more important in the power distribution system.Combining by DC power system as an example,the equivalent model of the DC power supply system and the equivalent circuit under short-circuit conditions were determined.The short circuit current value and the corresponding time constant were calculated,and the rationality of protection component selection at short circuit point was verified.

关 键 词：直流供电系统 短路电流计算 时间常数 保护元件 

分 类 号：TU852[建筑科学]