用于变电站单源多负载系统的低压晶闸管多端口直流断路器

Low-voltage direct current power supply system for secondary measuring and controlling devices in substation is a typical single-source multi-loads system, which is protected by air circuit breakers (ACBs) in cooperation with inverse time-lag trip. However, due to the long response time of ACB (≥10 ms), the selectivity of ACB cannot be ensured, enlarging the blackout scope and threatening the reli...