电力系统直流电源支路接地指示装置

论述了现有的直流系统接地故障检测方法及其不足之处,介绍了一种新的直流支路接地故障指示装置。该装置采用磁调制技术,检测直流支路的差电流,来判断该直流支路是否有接地故障,且通过判断差电流的方向可以确定直流支路的接地极性。其对直流系统无任何不良影响,不受直流系统分布电容的影响,能准确判断故障所在直流支路,易于安装,抗干扰性强。

Indication device for DC system grounding fault in power system

In contrast with the conventional methods used in measuring resistance between ground and DC power supply and in detecting grounding fault points, a new device is introduced which is superior to those used before. The device adopts the magnetic modulating technology to measure the differential current of DC branch, to judge whether this branch has grounding fault, and to define the grounding polarity of the branch through the direction of differential current. The device has no bad effects to DC system, is immune from the distributed capacity in DC system, and can corrcetly check out the branch on which DC system grounding occurrs. The proposed device is easy-fixed and strong anti-jamming.