基于电流注入法的小电流接地选线零序电流互感器二次回路的自动监测系统

An Automatic Monitoring System for the Secondary Circuit of the Zero-Sequence Current Transformer of the Small Current Grounding Line Selection Based on the Current Injection Method

随着社会对供电可靠性要求的不断提高,我国对配电网小电流接地系统的小电流接地选线装置正确动作率的要求也不断提高。针对小电流选线零序电流互感器二次回路监测难的问题,提出了一种基于电流注入法的零序电流互感器二次回路自动监测系统及方法,可及时有效发现小电流选线二次回路异常。

With the continuous improvement of social requirements for power supply reliability,the requirement for the correct action rate of small current grounding line selection device is also increasing.Aiming at the problem that it is difficult to monitor the secondary circuit of zero sequence current transformer for small current line selection,an automatic monitoring system and method for the secondary circuit of zero sequence current transformer based on current injection method is proposed in this paper.