覆冰绝缘子闪络过程泄漏电流监测设计与实现

Realization and Design of Leakage Current Detecting System of Flashover Process on Iced Insulators

覆冰绝缘子闪络过程中泄漏电流持续时间长 ,幅值变化大 ,用常规示波器很难测量 ,故据此特点设计了基于L ab View的覆冰绝缘子冰闪过程泄漏电流监测系统。通过设计制作前置处理电路及 L ab View编程来全过程监测覆冰污秽绝缘子闪络试验中及局部电弧发展变化过程中泄漏电流 ,并实现了波形显示、数据存储和分析。

The leakage current along the surface of an iced insulator lasts several seconds before flashover, and its amplitude varies in a wide range. It is difficult to measure the leakage current by an oscillograph. This paper develops a measurement system based on the graphical programming LabVIEW to record the leakage current of iced insulator string. It can measure leakage current on iced insulator and partial discharge exactly, and also has the functions of wave display, data memory, date analysis and printing et al.