摘要
随着绝缘子表面污秽的积累,绝缘子表面泄漏电流在污秽受潮的过程中有显著变化,泄漏电流对于描述绝缘子的绝缘状态有着简单易行、直观高效的优点。文中旨在介绍一种实用新型的便携式泄漏电流监测系统,适用于现场外绝缘的绝缘状况研究。该套系统数据采集使用差分模式,有效抑制共模信号干扰;数据同步采样率最高可达到20 k S/s,采样信号能够保留泄漏电流原始信号的全部信息;泄漏电流传感器选用具有分段处理信号功能的电阻型传感器,抗电磁干扰能力强,适用于复杂电磁环境;系统测量范围达到0.1 m A^5 A,相对误差控制在2%以内,同时可以配合分压器使用,测量与电流信号同步的电压信号,便于分析处理研究。与硬件系统相配套的软件平台基于Lab VIEW程序搭建,以虚拟仪器的形式实现真实测量仪器的效果,具有操作简单、功能丰富以及可扩展能力强的优点。该套便携式泄漏电流监测系统具有质量轻、体积小、经济灵活、移动方便等特点,适用于各科研单位在不同的试验现场使用。
The leakage current of insulator surface varies with the accumulation of pollution,which is an implementable and effective method.This paper proposes a portable leakage current monitoring system for site outer insulation studies.Difference mode has been applied in this system for common mode signal re-duction.The synchronous sampling rate can reach 20 k S/s,which can record full information in the leakage current data.Resistor sensor has been applied in this system,which has a good anti-electromagnetic interference performance.This system has a wide measuring range from 0.1 m A to 5 A,relative error can be controlled within 2%.Applied voltage values on the insulator can also been measured through this sys-tem when correlating with a voltage divider.LABVIEW has been applied for software platform building of the system,which is easy to operate,rich in functions and extendible.Features of this system are light weight,small volume,economic and convenient to implement.This system can fit varies site applications for research institutes.
出处
《高压电器》
CAS
CSCD
北大核心
2014年第12期141-146,共6页
High Voltage Apparatus
关键词
泄漏电流
测量
便携式
应用
leakage current
measuring
portable
application
