中低压母线电弧光保护研究与应用

Research on and Application of Electric Arc Protection of MV or LV Buses

电弧光保护采用中低压母线故障产生的电弧光和过电流作为判据,其原理简单、动作可靠迅速、且具有故障点定位功能,该保护已应用于220kV马庄变电站10kV母线,能够避免或减轻母线故障对开关柜及变压器的损坏,为中低压系统设备的安全运行提供了可靠的保障。

Adopting the electric arc light and over-current caused by MV or LV buses＇ faults as the criterion in electric arc protection possesses the following advantages：its principle is simple,its action is reliable and rapid,and it can locate the fault point accurately.This protection has been applied on 10 kV bus of Mazhuang 220 kV Transformer Substation for avoiding or reducing the damage of switch and transformer cause by bus fault,which provides the reliable guarantee for the safe operation of equipment in MV or LV system.