基于PCB罗氏线圈的暂态电流采集装置

Transient Current Acquisition Device Based on PCB Rogowski Coil

故障暂态电流包含了大量的故障信息,是输电线路故障定位和故障诊断的主要依据。以开启式PCB罗氏线圈为故障电流传感器,实现故障暂态电流的低成本获取,通过窗口比较器实现对触发阀值的动态设计,利用总线复用技术实现对暂态故障电流的实时监测,最终实现0～25 kA暂态故障电流的精确采集。有望为输电线路故障检测提供一种新的手段。

Fault transient current contains abundant fault information and is the main base for fault localization and fault diagnosis of transmission lines. Using open-type PCB Rogowski coil as fault current sensor,this paper realized low-cost acquisition of fault transient current.Dynamic design of the trigger threshold was realized through a window comparator,and bus sharing technique was used to achieve real-time monitoring of the transient fault current. Finally,accurate acquisition of 0 -25 kA transient fault current was realized. The proposed scheme could hopefully become a new means for fault detection on transmission lines.